How to set iframe size dynamically

The height is different depending on the browser's window size. It should be set dynamically depending on the size of the browser window

<!DOCTYPE html>
    <html>
    <body>
    
    <center><h2>Heading</h2></center>
    <center><p>Paragraph</p></center>
    
    <iframe src="url" height="600" width="1350" title="Enter Here"></iframe>
    
    </body>
    </html>

Resize a large bitmap file to scaled output file on Android

This may be useful for someone else looking at this question. I rewrote Justin's code to allow the method to receive the target size object required as well. This works very well when using Canvas. All credit should go to JUSTIN for his great initial code.

    private Bitmap getBitmap(int path, Canvas canvas) {

        Resources resource = null;
        try {
            final int IMAGE_MAX_SIZE = 1200000; // 1.2MP
            resource = getResources();

            // Decode image size
            BitmapFactory.Options options = new BitmapFactory.Options();
            options.inJustDecodeBounds = true;
            BitmapFactory.decodeResource(resource, path, options);

            int scale = 1;
            while ((options.outWidth * options.outHeight) * (1 / Math.pow(scale, 2)) > 
                  IMAGE_MAX_SIZE) {
               scale++;
            }
            Log.d("TAG", "scale = " + scale + ", orig-width: " + options.outWidth + ", orig-height: " + options.outHeight);

            Bitmap pic = null;
            if (scale > 1) {
                scale--;
                // scale to max possible inSampleSize that still yields an image
                // larger than target
                options = new BitmapFactory.Options();
                options.inSampleSize = scale;
                pic = BitmapFactory.decodeResource(resource, path, options);

                // resize to desired dimensions
                int height = canvas.getHeight();
                int width = canvas.getWidth();
                Log.d("TAG", "1th scale operation dimenions - width: " + width + ", height: " + height);

                double y = Math.sqrt(IMAGE_MAX_SIZE
                        / (((double) width) / height));
                double x = (y / height) * width;

                Bitmap scaledBitmap = Bitmap.createScaledBitmap(pic, (int) x, (int) y, true);
                pic.recycle();
                pic = scaledBitmap;

                System.gc();
            } else {
                pic = BitmapFactory.decodeResource(resource, path);
            }

            Log.d("TAG", "bitmap size - width: " +pic.getWidth() + ", height: " + pic.getHeight());
            return pic;
        } catch (Exception e) {
            Log.e("TAG", e.getMessage(),e);
            return null;
        }
    }

Justin's code is VERY effective at reducing the overhead of working with large Bitmaps.

How to resize image automatically on browser width resize but keep same height?

I've used Perfect Full Page Background Image to accomplish this on a previous site.

You can use background-size: cover; if you only need to support modern browsers.

WPF: Setting the Width (and Height) as a Percentage Value

You can put the textboxes inside a grid to do percentage values on the rows or columns of the grid and let the textboxes auto-fill to their parent cells (as they will by default). Example:

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="2*" />
        <ColumnDefinition Width="3*" />
    </Grid.ColumnDefinitions>

    <TextBox Grid.Column="0" />
    <TextBox Grid.Column="1" />
</Grid>

This will make #1 2/5 of the width, and #2 3/5.

Scale image to fit a bounding box

The cleanest and simplest way to do this:

First some CSS:

div.image-wrapper {
    height: 230px; /* Suggestive number; pick your own height as desired */
    position: relative;
    overflow: hidden; /* This will do the magic */
    width: 300px; /* Pick an appropriate width as desired, unless you already use a grid, in that case use 100% */
}
img {
    width: 100%;
    position: absolute;
    left: 0;
    top: 0;
    height: auto;
}

The HTML:

<div class="image-wrapper">
  <img src="yourSource.jpg">
</div>

This should do the trick!

Merging two images with PHP

The GD Image Manipulation Library in PHP is probably the best for working with images in PHP. Try one of the imagecopy functions (imagecopy, imagecopymerge, ...). Each of them combine 2 images in different ways. See the php documentation on imagecopy for more information.

Set size of HTML page and browser window

You could try:

<html>
    <head>
        <style>
            #main {
                width: 500; /*Set to whatever*/
                height: 500;/*Set to whatever*/
            }
        </style>
    </head>
    <body id="main">
    </body>
</html>

How to resize a custom view programmatically?

This works for me:

ViewGroup.LayoutParams params = layout.getLayoutParams();
params.height = customHeight;
layout.requestLayout();

Change form size at runtime in C#

You can change the height of a form by doing the following where you want to change the size (substitute '10' for your size):

this.Height = 10;

This can be done with the width as well:

this.Width = 10;

How can I scale an entire web page with CSS?

With this code 1em or 100% will equal to 1% of the body height

document.body.style.fontSize = ((window.innerHeight/100)*6.25)+"%"

Numpy Resize/Rescale Image

For people coming here from Google looking for a fast way to downsample images in numpy arrays for use in Machine Learning applications, here's a super fast method (adapted from here ). This method only works when the input dimensions are a multiple of the output dimensions.

The following examples downsample from 128x128 to 64x64 (this can be easily changed).

Channels last ordering

# large image is shape (128, 128, 3)
# small image is shape (64, 64, 3)
input_size = 128
output_size = 64
bin_size = input_size // output_size
small_image = large_image.reshape((output_size, bin_size, 
                                   output_size, bin_size, 3)).max(3).max(1)

Channels first ordering

# large image is shape (3, 128, 128)
# small image is shape (3, 64, 64)
input_size = 128
output_size = 64
bin_size = input_size // output_size
small_image = large_image.reshape((3, output_size, bin_size, 
                                      output_size, bin_size)).max(4).max(2)

For grayscale images just change the 3 to a 1 like this:

Channels first ordering

# large image is shape (1, 128, 128)
# small image is shape (1, 64, 64)
input_size = 128
output_size = 64
bin_size = input_size // output_size
small_image = large_image.reshape((1, output_size, bin_size,
                                      output_size, bin_size)).max(4).max(2)

This method uses the equivalent of max pooling. It's the fastest way to do this that I've found.

Set iframe content height to auto resize dynamically

In the iframe: So that means you have to add some code in the iframe page. Simply add this script to your code IN THE IFRAME:

<body onload="parent.alertsize(document.body.scrollHeight);">

In the holding page: In the page holding the iframe (in my case with ID="myiframe") add a small javascript:

<script>
function alertsize(pixels){
    pixels+=32;
    document.getElementById('myiframe').style.height=pixels+"px";
}
</script>

What happens now is that when the iframe is loaded it triggers a javascript in the parent window, which in this case is the page holding the iframe.

To that JavaScript function it sends how many pixels its (iframe) height is.

The parent window takes the number, adds 32 to it to avoid scrollbars, and sets the iframe height to the new number.

That's it, nothing else is needed.

But if you like to know some more small tricks keep on reading...

DYNAMIC HEIGHT IN THE IFRAME? If you like me like to toggle content the iframe height will change (without the page reloading and triggering the onload). I usually add a very simple toggle script I found online:

<script>
function toggle(obj) {
    var el = document.getElementById(obj);
    if ( el.style.display != 'block' ) el.style.display = 'block';
    else el.style.display = 'none';
}
</script>

to that script just add:

<script>
function toggle(obj) {
    var el = document.getElementById(obj);
    if ( el.style.display != 'block' ) el.style.display = 'block';
    else el.style.display = 'none';
    parent.alertsize(document.body.scrollHeight); // ADD THIS LINE!
}
</script>

How you use the above script is easy:

<a href="javascript:toggle('moreheight')">toggle height?</a><br />
<div style="display:none;" id="moreheight">
more height!<br />
more height!<br />
more height!<br />
</div>

For those that like to just cut and paste and go from there here is the two pages. In my case I had them in the same folder, but it should work cross domain too (I think...)

Complete holding page code:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1">
<title>THE IFRAME HOLDER</title>
<script>
function alertsize(pixels){
    pixels+=32;
    document.getElementById('myiframe').style.height=pixels+"px";
}
</script>
</head>

<body style="background:silver;">
<iframe src='theiframe.htm' style='width:458px;background:white;' frameborder='0' id="myiframe" scrolling="auto"></iframe>
</body>
</html>

Complete iframe code: (this iframe named "theiframe.htm")

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1">
<title>IFRAME CONTENT</title>
<script>
function toggle(obj) {
    var el = document.getElementById(obj);
    if ( el.style.display != 'block' ) el.style.display = 'block';
    else el.style.display = 'none';
    parent.alertsize(document.body.scrollHeight);
}
</script>
</head>

<body onload="parent.alertsize(document.body.scrollHeight);">
<a href="javascript:toggle('moreheight')">toggle height?</a><br />
<div style="display:none;" id="moreheight">
more height!<br />
more height!<br />
more height!<br />
</div>
text<br />
text<br />
text<br />
text<br />
text<br />
text<br />
text<br />
text<br />
THE END

</body>
</html>

Demo

How to auto resize and adjust Form controls with change in resolution

Use combinations of these to get the desired result:

Set Anchor property to None, the controls will not be resized, they only shift their position.
Set Anchor property to Top+Bottom+Left+Right, the controls will be resized but they don't change their position.
Set the Minimum Size of the form to a proper value.
Set Dock property.
Use Form Resize event to change whatever you want

I don't know how font size (label, textbox, combobox, etc.) will be affected in (1) - (4), but it can be controlled in (5).

Delete item from array and shrink array

No use of any pre defined function as well as efficient: --- >>

public static void Delete(int d , int[] array )
{       
    Scanner in = new Scanner (System.in);

    int i , size = array.length;

    System.out.println("ENTER THE VALUE TO DELETE? ");

     d = in.nextInt();

        for ( i=0;i< size;i++)
        {
                if (array[i] == d)
                        {


                            int[] arr3 =new int[size-1];
                            int[] arr4 = new int[i];
                            int[] arr5 = new int[size-i-1];

                                    for (int a =0 ;a<i;a++)
                                    {
                                        arr4[a]=array[a];
                                        arr3[a] = arr4[a];
                                    }
                                     for (int a =i ;a<size-1;a++)
                                     {
                                         arr5[a-i] = array[a+1];
                                         arr3[a] = arr5[a-i];

                                     }


                System.out.println(Arrays.toString(arr3));

                        }
                else System.out.println("************");    


        }

}

How to resize an image with OpenCV2.0 and Python2.6

Example doubling the image size

There are two ways to resize an image. The new size can be specified:

Manually;

height, width = src.shape[:2]

dst = cv2.resize(src, (2*width, 2*height), interpolation = cv2.INTER_CUBIC)
By a scaling factor.

dst = cv2.resize(src, None, fx = 2, fy = 2, interpolation = cv2.INTER_CUBIC), where fx is the scaling factor along the horizontal axis and fy along the vertical axis.

To shrink an image, it will generally look best with INTER_AREA interpolation, whereas to enlarge an image, it will generally look best with INTER_CUBIC (slow) or INTER_LINEAR (faster but still looks OK).

Example shrink image to fit a max height/width (keeping aspect ratio)

import cv2

img = cv2.imread('YOUR_PATH_TO_IMG')

height, width = img.shape[:2]
max_height = 300
max_width = 300

# only shrink if img is bigger than required
if max_height < height or max_width < width:
    # get scaling factor
    scaling_factor = max_height / float(height)
    if max_width/float(width) < scaling_factor:
        scaling_factor = max_width / float(width)
    # resize image
    img = cv2.resize(img, None, fx=scaling_factor, fy=scaling_factor, interpolation=cv2.INTER_AREA)

cv2.imshow("Shrinked image", img)
key = cv2.waitKey()

Using your code with cv2

import cv2 as cv

im = cv.imread(path)

height, width = im.shape[:2]

thumbnail = cv.resize(im, (round(width / 10), round(height / 10)), interpolation=cv.INTER_AREA)

cv.imshow('exampleshq', thumbnail)
cv.waitKey(0)
cv.destroyAllWindows()

The simplest way to resize an UIImage?

Here my somewhat-verbose Swift code

func scaleImage(image:UIImage,  toSize:CGSize) -> UIImage {
    UIGraphicsBeginImageContextWithOptions(toSize, false, 0.0);

    let aspectRatioAwareSize = self.aspectRatioAwareSize(image.size, boxSize: toSize, useLetterBox: false)


    let leftMargin = (toSize.width - aspectRatioAwareSize.width) * 0.5
    let topMargin = (toSize.height - aspectRatioAwareSize.height) * 0.5


    image.drawInRect(CGRectMake(leftMargin, topMargin, aspectRatioAwareSize.width , aspectRatioAwareSize.height))
    let retVal = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    return retVal
}

func aspectRatioAwareSize(imageSize: CGSize, boxSize: CGSize, useLetterBox: Bool) -> CGSize {
    // aspect ratio aware size
    // http://stackoverflow.com/a/6565988/8047
    let imageWidth = imageSize.width
    let imageHeight = imageSize.height
    let containerWidth = boxSize.width
    let containerHeight = boxSize.height

    let imageAspectRatio = imageWidth/imageHeight
    let containerAspectRatio = containerWidth/containerHeight

    let retVal : CGSize
    // use the else at your own risk: it seems to work, but I don't know 
    // the math
    if (useLetterBox) {
        retVal = containerAspectRatio > imageAspectRatio ? CGSizeMake(imageWidth * containerHeight / imageHeight, containerHeight) : CGSizeMake(containerWidth, imageHeight * containerWidth / imageWidth)
    } else {
        retVal = containerAspectRatio < imageAspectRatio ? CGSizeMake(imageWidth * containerHeight / imageHeight, containerHeight) : CGSizeMake(containerWidth, imageHeight * containerWidth / imageWidth)
    }

    return retVal
}

Change the size of a JTextField inside a JBorderLayout

Any component added to the GridLayout will be resized to the same size as the largest component added. If you want a component to remain at its preferred size, then wrap that component in a JPanel and then the panel will be resized:

JPanel displayPanel = new JPanel(new GridLayout(4, 2)); 
JTextField titleText = new JTextField("title"); 
JPanel wrapper = new JPanel( new FlowLayout(0, 0, FlowLayout.LEADING) );
wrapper.add( titleText );
displayPanel.add(wrapper); 
//displayPanel.add(titleText);

Rerender view on browser resize with React

I know this has been answered but just thought I'd share my solution as the top answer, although great, may now be a little outdated.

    constructor (props) {
      super(props)

      this.state = { width: '0', height: '0' }

      this.initUpdateWindowDimensions = this.updateWindowDimensions.bind(this)
      this.updateWindowDimensions = debounce(this.updateWindowDimensions.bind(this), 200)
    }

    componentDidMount () {
      this.initUpdateWindowDimensions()
      window.addEventListener('resize', this.updateWindowDimensions)
    }

    componentWillUnmount () {
      window.removeEventListener('resize', this.updateWindowDimensions)
    }

    updateWindowDimensions () {
      this.setState({ width: window.innerWidth, height: window.innerHeight })
    }

The only difference really is that I'm debouncing (only running every 200ms) the updateWindowDimensions on the resize event to increase performance a bit, BUT not debouncing it when it's called on ComponentDidMount.

I was finding the debounce made it quite laggy to mount sometimes if you have a situation where it's mounting often.

Just a minor optimisation but hope it helps someone!

Resizing Images in VB.NET

You can simply use this one line code to resize your image in visual basic .net

Public Shared Function ResizeImage(ByVal InputImage As Image) As Image
        Return New Bitmap(InputImage, New Size(64, 64))
End Function

Where;

"InputImage" is the image you want to resize.
"64 X 64" is the required size you may change it as your needs i.e 32X32 etc.

How can I resize an image dynamically with CSS as the browser width/height changes?

window.onresize = function(){
    var img = document.getElementById('fullsize');
    img.style.width = "100%";
};

In IE onresize event gets fired on every pixel change (width or height) so there could be performance issue. Delay image resizing for few milliseconds by using javascript's window.setTimeout().

http://mbccs.blogspot.com/2007/11/fixing-window-resize-event-in-ie.html

Creating a textarea with auto-resize

You're using the higher value of the current clientHeight and the content scrollHeight. When you make the scrollHeight smaller by removing content, the calculated area can't get smaller because the clientHeight, previously set by style.height, is holding it open. You could instead take a max() of scrollHeight and a minimum height value you have predefined or calculated from textarea.rows.

In general you probably shouldn't really rely on scrollHeight on form controls. Apart from scrollHeight being traditionally less widely-supported than some of the other IE extensions, HTML/CSS says nothing about how form controls are implemented internally and you aren't guaranteed scrollHeight will be anything meaningful. (Traditionally some browsers have used OS widgets for the task, making CSS and DOM interaction on their internals impossible.) At least sniff for scrollHeight/clientHeight's existance before trying to enable the effect.

Another possible alternative approach to avoid the issue if it's important that it work more widely might be to use a hidden div sized to the same width as the textarea, and set in the same font. On keyup, you copy the text from the textarea to a text node in hidden div (remembering to replace '\n' with a line break, and escape '<'/'&' properly if you're using innerHTML). Then simply measuring the div's offsetHeight will give you the height you need.

Prevent div from moving while resizing the page

hi firstly there seems to be many 'errors' in your html where you are missing closing tags, you could try wrapping the contents of your <body> in a fixed width <div style="margin: 0 auto; width: 900px> to achieve what you have done with the body {margin: 0 10% 0 10%}

How to get full width in body element

You should set body and html to position:fixed;, and then set right:, left:, top:, and bottom: to 0;. That way, even if content overflows it will not extend past the limits of the viewport.

For example:

<html>
<body>
    <div id="wrapper"></div>
</body>
</html>

CSS:

html, body, {
    position:fixed;
    top:0;
    bottom:0;
    left:0;
    right:0;
}

JS Fiddle Example

Caveat: Using this method, if the user makes their window smaller, content will be cut off.

How to center canvas in html5

You can give your canvas the ff CSS properties:

#myCanvas
{
    display: block;
    margin: 0 auto;
}

How to resize images proportionally / keeping the aspect ratio?

Have a look at this piece of code from http://ericjuden.com/2009/07/jquery-image-resize/

$(document).ready(function() {
    $('.story-small img').each(function() {
        var maxWidth = 100; // Max width for the image
        var maxHeight = 100;    // Max height for the image
        var ratio = 0;  // Used for aspect ratio
        var width = $(this).width();    // Current image width
        var height = $(this).height();  // Current image height

        // Check if the current width is larger than the max
        if(width > maxWidth){
            ratio = maxWidth / width;   // get ratio for scaling image
            $(this).css("width", maxWidth); // Set new width
            $(this).css("height", height * ratio);  // Scale height based on ratio
            height = height * ratio;    // Reset height to match scaled image
            width = width * ratio;    // Reset width to match scaled image
        }

        // Check if current height is larger than max
        if(height > maxHeight){
            ratio = maxHeight / height; // get ratio for scaling image
            $(this).css("height", maxHeight);   // Set new height
            $(this).css("width", width * ratio);    // Scale width based on ratio
            width = width * ratio;    // Reset width to match scaled image
            height = height * ratio;    // Reset height to match scaled image
        }
    });
});

PHPExcel auto size column width

Here a more flexible variant based on @Mark Baker post:

foreach (range('A', $phpExcelObject->getActiveSheet()->getHighestDataColumn()) as $col) {
        $phpExcelObject->getActiveSheet()
                ->getColumnDimension($col)
                ->setAutoSize(true);
    }

Hope this helps ;)

Automatically resize images with browser size using CSS

This may be too simplistic of an answer (I am still new here), but what I have done in the past to remedy this situation is figured out the percentage of the screen I would like the image to take up. For example, there is one webpage I am working on where the logo must take up 30% of the screen size to look best. I played around and finally tried this code and it has worked for me thus far:

img {
width:30%;
height:auto;
}

That being said, this will change all of your images to be 30% of the screen size at all times. To get around this issue, simply make this a class and apply it to the image that you desire to be at 30% directly. Here is an example of the code I wrote to accomplish this on the aforementioned site:

the CSS portion:

.logo {
position:absolute;
right:25%;
top:0px;
width:30%;
height:auto;
}

the HTML portion:

<img src="logo_001_002.png" class="logo">

Alternatively, you could place ever image you hope to automatically resize into a div of its own and use the class tag option on each div (creating now class tags whenever needed), but I feel like that would cause a lot of extra work eventually. But, if the site calls for it: the site calls for it.

Hopefully this helps. Have a great day!

How to resize an Image C#

Why not use the System.Drawing.Image.GetThumbnailImage method?

public Image GetThumbnailImage(
    int thumbWidth, 
    int thumbHeight, 
    Image.GetThumbnailImageAbort callback, 
    IntPtr callbackData)

Example:

Image originalImage = System.Drawing.Image.FromStream(inputStream, true, true);
Image resizedImage = originalImage.GetThumbnailImage(newWidth, (newWidth * originalImage.Height) / originalWidth, null, IntPtr.Zero);
resizedImage.Save(imagePath, ImageFormat.Png);

Source: http://msdn.microsoft.com/en-us/library/system.drawing.image.getthumbnailimage.aspx

AngularJS $watch window resize inside directive

You can listen resize event and fire where some dimension change

directive

(function() {
'use strict';

    angular
    .module('myApp.directives')
    .directive('resize', ['$window', function ($window) {
        return {
            link: link,
            restrict: 'A'
        };

        function link(scope, element, attrs){
            scope.width = $window.innerWidth;
            function onResize(){
                // uncomment for only fire when $window.innerWidth change   
                // if (scope.width !== $window.innerWidth)
                {
                    scope.width = $window.innerWidth;
                    scope.$digest();
                }
            };

            function cleanUp() {
                angular.element($window).off('resize', onResize);
            }

            angular.element($window).on('resize', onResize);
            scope.$on('$destroy', cleanUp);
        }
    }]);
})();

In html

<div class="row" resize> ,
    <div class="col-sm-2 col-xs-6" ng-repeat="v in tag.vod"> 
        <h4 ng-bind="::v.known_as"></h4>
    </div> 
</div>

Controller :

$scope.$watch('width', function(old, newv){
     console.log(old, newv);
 })

How to resize datagridview control when form resizes

Unless I am misunderstanding what you are asking you can do this on the properties for your data grid view. You need to set the Anchor property to the sides you want it locked to.

How can I resize an image using Java?

I have developed a solution with the freely available classes ( AnimatedGifEncoder, GifDecoder, and LWZEncoder) available for handling GIF Animation.
You can download the jgifcode jar and run the GifImageUtil class. Link: http://www.jgifcode.com

UIImage resize (Scale proportion)

This fixes the math to scale to the max size in both width and height rather than just one depending on the width and height of the original.

- (UIImage *) scaleProportionalToSize: (CGSize)size
{
    float widthRatio = size.width/self.size.width;
    float heightRatio = size.height/self.size.height;

    if(widthRatio > heightRatio)
    {
        size=CGSizeMake(self.size.width*heightRatio,self.size.height*heightRatio);
    } else {
        size=CGSizeMake(self.size.width*widthRatio,self.size.height*widthRatio);
    }

    return [self scaleToSize:size];
}

Image resizing client-side with JavaScript before upload to the server

Perhaps with the canvas tag (though it's not portable). There's a blog about how to rotate an image with canvas here, I suppose if you can rotate it, you can resize it. Maybe it can be a starting point.

See this library also.

Input type "number" won't resize

What you want is maxlength.

Valid for text, search, url, tel, email, and password, it defines the maximum number of characters (as UTF-16 code units) the user can enter into the field. This must be an integer value 0 or higher. If no maxlength is specified, or an invalid value is specified, the field has no maximum length. This value must also be greater than or equal to the value of minlength.

You might consider using one of these input types.

How can I make all images of different height and width the same via CSS?

Simplest way - This will keep the image size as it is and fill the other area with space, this way all the images will take same specified space regardless of the image size without stretching

.img{
   width:100px;
   height:100px;

/*Scale down will take the necessary specified space that is 100px x 100px without stretching the image*/
    object-fit:scale-down;

}

jquery $(window).width() and $(window).height() return different values when viewport has not been resized

Try to use a

$(window).load event

$(document).ready

because the initial values may be inconstant because of changes that occur during the parsing or during the DOM load.

Cross-browser window resize event - JavaScript / jQuery

jQuery has a built-in method for this:

$(window).resize(function () { /* do something */ });

For the sake of UI responsiveness, you might consider using a setTimeout to call your code only after some number of milliseconds, as shown in the following example, inspired by this:

function doSomething() {
    alert("I'm done resizing for the moment");
};

var resizeTimer;
$(window).resize(function() {
    clearTimeout(resizeTimer);
    resizeTimer = setTimeout(doSomething, 100);
});

How to easily resize/optimize an image size with iOS?

For Swift 3, the below code scales the image keeping the aspect ratio. You can read more about the ImageContext in Apple's documentation:

extension UIImage {
    class func resizeImage(image: UIImage, newHeight: CGFloat) -> UIImage {
        let scale = newHeight / image.size.height
        let newWidth = image.size.width * scale
        UIGraphicsBeginImageContext(CGSize(width: newWidth, height: newHeight))
        image.draw(in: CGRect(x: 0, y: 0, width: newWidth, height: newHeight))
        let newImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return newImage!
    }
}

To use it, call resizeImage() method:

UIImage.resizeImage(image: yourImageName, newHeight: yourImageNewHeight)

How do I disable form resizing for users?

Using the MaximumSize and MinimumSize properties of the form will fix the form size, and prevent the user from resizing the form, while keeping the form default FormBorderStyle.

this.MaximumSize = new Size(XX, YY);
this.MinimumSize = new Size(X, Y);

Using jQuery To Get Size of Viewport

To get size of viewport on load and on resize (based on SimaWB response):

function getViewport() {
    var viewportWidth = $(window).width();
    var viewportHeight = $(window).height();
    $('#viewport').html('Viewport: '+viewportWidth+' x '+viewportHeight+' px');
}

getViewport();

$(window).resize(function() {
    getViewport()
});

Android: How to Programmatically set the size of a Layout

You can get the actual height of called layout with this code:

public int getLayoutSize() {
// Get the layout id
    final LinearLayout root = (LinearLayout) findViewById(R.id.mainroot);
    final AtomicInteger layoutHeight = new AtomicInteger();

    root.post(new Runnable() { 
    public void run() { 
        Rect rect = new Rect(); 
        Window win = getWindow();  // Get the Window
                win.getDecorView().getWindowVisibleDisplayFrame(rect);

                // Get the height of Status Bar
                int statusBarHeight = rect.top;

                // Get the height occupied by the decoration contents 
                int contentViewTop = win.findViewById(Window.ID_ANDROID_CONTENT).getTop();

                // Calculate titleBarHeight by deducting statusBarHeight from contentViewTop  
                int titleBarHeight = contentViewTop - statusBarHeight; 
                Log.i("MY", "titleHeight = " + titleBarHeight + " statusHeight = " + statusBarHeight + " contentViewTop = " + contentViewTop); 

                // By now we got the height of titleBar & statusBar
                // Now lets get the screen size
                DisplayMetrics metrics = new DisplayMetrics();
                getWindowManager().getDefaultDisplay().getMetrics(metrics);   
                int screenHeight = metrics.heightPixels;
                int screenWidth = metrics.widthPixels;
                Log.i("MY", "Actual Screen Height = " + screenHeight + " Width = " + screenWidth);   

                // Now calculate the height that our layout can be set
                // If you know that your application doesn't have statusBar added, then don't add here also. Same applies to application bar also 
                layoutHeight.set(screenHeight - (titleBarHeight + statusBarHeight));
                Log.i("MY", "Layout Height = " + layoutHeight);   

            // Lastly, set the height of the layout       
            FrameLayout.LayoutParams rootParams = (FrameLayout.LayoutParams)root.getLayoutParams();
            rootParams.height = layoutHeight.get();
            root.setLayoutParams(rootParams);
        }
    });

return layoutHeight.get();
}

Resizable table columns with jQuery

I tried to add to @user686605's work:

1) changed the cursor to col-resize at the th border

2) fixed the highlight text issue when resizing

I partially succeeded at both. Maybe someone who is better at CSS can help move this forward?

http://jsfiddle.net/telefonica/L2f7F/4/

HTML

<!--Click on th and drag...-->
<table>
    <thead>
        <tr>
            <th><div class="noCrsr">th 1</div></th>
            <th><div class="noCrsr">th 2</div></th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>td 1</td>
            <td>td 2</td>
        </tr>
    </tbody>
</table>

$(function() {
    var pressed = false;
    var start = undefined;
    var startX, startWidth;

    $("table th").mousedown(function(e) {
        start = $(this);
        pressed = true;
        startX = e.pageX;
        startWidth = $(this).width();
        $(start).addClass("resizing");
        $(start).addClass("noSelect");
    });

    $(document).mousemove(function(e) {
        if(pressed) {
            $(start).width(startWidth+(e.pageX-startX));
        }
    });

    $(document).mouseup(function() {
        if(pressed) {
            $(start).removeClass("resizing");
            $(start).removeClass("noSelect");
            pressed = false;
        }
    });
});

CSS

table {
    border-width: 1px;
    border-style: solid;
    border-color: black;
    border-collapse: collapse;
}

table td {
    border-width: 1px;
    border-style: solid;
    border-color: black;
}

table th {
    border: 1px;
    border-style: solid;
    border-color: black;
    background-color: green;
    cursor: col-resize;
}

table th.resizing {
    cursor: col-resize;
}

.noCrsr {
    cursor: default;
    margin-right: +5px;
}

.noSelect {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

Resize jqGrid when browser is resized?

This works..

var $targetGrid = $("#myGridId");
$(window).resize(function () {
    var jqGridWrapperId = "#gbox_" + $targetGrid.attr('id') //here be dragons, this is     generated by jqGrid.
    $targetGrid.setGridWidth($(jqGridWrapperId).parent().width()); //perhaps add padding calculation here?
});

How to wait for the 'end' of 'resize' event and only then perform an action?

I wrote a function that passes a function when wrapped in any resize event. It uses an interval so that the resize even isn't constantly creating timeout events. This allows it to perform independently of the resize event other than a log entry that should be removed in production.

https://github.com/UniWrighte/resizeOnEnd/blob/master/resizeOnEnd.js

        $(window).resize(function(){
            //call to resizeEnd function to execute function on resize end.
    //can be passed as function name or anonymous function
            resizeEnd(function(){



    });

        });

        //global variables for reference outside of interval
        var interval = null;
        var width = $(window).width();
    var numi = 0; //can be removed in production
        function resizeEnd(functionCall){
            //check for null interval
            if(!interval){
                //set to new interval
                interval = setInterval(function(){
        //get width to compare
                    width2 = $(window).width();
        //if stored width equals new width
                    if(width === width2){
                        //clear interval, set to null, and call passed function
                        clearInterval(interval);
                        interval = null; //precaution
                        functionCall();

                    }
        //set width to compare on next interval after half a second
                    width = $(window).width();
                }, 500);

            }else{
                //logging that should be removed in production
                console.log("function call " + numi++ + " and inteval set skipped");

            }

}

registerForRemoteNotificationTypes: is not supported in iOS 8.0 and later

For the Swift-inclined:

if let registration: AnyObject = NSClassFromString("UIUserNotificationSettings") { // iOS 8+
    let notificationTypes: UIUserNotificationType = (.Alert | .Badge | .Sound)
    let notificationSettings: UIUserNotificationSettings = UIUserNotificationSettings(forTypes: notificationTypes, categories: nil)

    application.registerUserNotificationSettings(notificationSettings)
} else { // iOS 7
    application.registerForRemoteNotificationTypes(.Alert | .Badge | .Sound)
}

Delete all duplicate rows Excel vba

The duplicate values in any column can be deleted with a simple for loop.

Sub remove()
Dim a As Long
For a = Cells(Rows.Count, 1).End(xlUp).Row To 1 Step -1
If WorksheetFunction.CountIf(Range("A1:A" & a), Cells(a, 1)) > 1 Then Rows(a).Delete
Next
End Sub

What's the Android ADB shell "dumpsys" tool and what are its benefits?

What's dumpsys and what are its benefit

dumpsys is an android tool that runs on the device and dumps interesting information about the status of system services.

Obvious benefits:

Possibility to easily get system information in a simple string representation.
Possibility to use dumped CPU, RAM, Battery, storage stats for a pretty charts, which will allow you to check how your application affects the overall device!

What information can we retrieve from dumpsys shell command and how we can use it

If you run dumpsys you would see a ton of system information. But you can use only separate parts of this big dump.

to see all of the "subcommands" of dumpsys do:

dumpsys | grep "DUMP OF SERVICE"

Output:

DUMP OF SERVICE SurfaceFlinger:
DUMP OF SERVICE accessibility:
DUMP OF SERVICE account:
DUMP OF SERVICE activity:
DUMP OF SERVICE alarm:
DUMP OF SERVICE appwidget:
DUMP OF SERVICE audio:
DUMP OF SERVICE backup:
DUMP OF SERVICE battery:
DUMP OF SERVICE batteryinfo:
DUMP OF SERVICE clipboard:
DUMP OF SERVICE connectivity:
DUMP OF SERVICE content:
DUMP OF SERVICE cpuinfo:
DUMP OF SERVICE device_policy:
DUMP OF SERVICE devicestoragemonitor:
DUMP OF SERVICE diskstats:
DUMP OF SERVICE dropbox:
DUMP OF SERVICE entropy:
DUMP OF SERVICE hardware:
DUMP OF SERVICE input_method:
DUMP OF SERVICE iphonesubinfo:
DUMP OF SERVICE isms:
DUMP OF SERVICE location:
DUMP OF SERVICE media.audio_flinger:
DUMP OF SERVICE media.audio_policy:
DUMP OF SERVICE media.player:
DUMP OF SERVICE meminfo:
DUMP OF SERVICE mount:
DUMP OF SERVICE netstat:
DUMP OF SERVICE network_management:
DUMP OF SERVICE notification:
DUMP OF SERVICE package:
DUMP OF SERVICE permission:
DUMP OF SERVICE phone:
DUMP OF SERVICE power:
DUMP OF SERVICE reboot:
DUMP OF SERVICE screenshot:
DUMP OF SERVICE search:
DUMP OF SERVICE sensor:
DUMP OF SERVICE simphonebook:
DUMP OF SERVICE statusbar:
DUMP OF SERVICE telephony.registry:
DUMP OF SERVICE throttle:
DUMP OF SERVICE usagestats:
DUMP OF SERVICE vibrator:
DUMP OF SERVICE wallpaper:
DUMP OF SERVICE wifi:
DUMP OF SERVICE window:

Some Dumping examples and output

1) Getting all possible battery statistic:

$~ adb shell dumpsys battery

You will get output:

Current Battery Service state:
AC powered: false
AC capacity: 500000
USB powered: true
status: 5
health: 2
present: true
level: 100
scale: 100
voltage:4201
temperature: 271 <---------- Battery temperature! %)
technology: Li-poly <---------- Battery technology! %)

2)Getting wifi informations

~$ adb shell dumpsys wifi

Output:

Wi-Fi is enabled
Stay-awake conditions: 3

Internal state:
interface tiwlan0 runState=Running
SSID: XXXXXXX BSSID: xx:xx:xx:xx:xx:xx, MAC: xx:xx:xx:xx:xx:xx, Supplicant state: COMPLETED, RSSI: -60, Link speed: 54, Net ID: 2, security: 0, idStr: null
ipaddr 192.168.1.xxx gateway 192.168.x.x netmask 255.255.255.0 dns1 192.168.x.x dns2 8.8.8.8 DHCP server 192.168.x.x lease 604800 seconds
haveIpAddress=true, obtainingIpAddress=false, scanModeActive=false
lastSignalLevel=2, explicitlyDisabled=false

Latest scan results:

Locks acquired: 28 full, 0 scan
Locks released: 28 full, 0 scan

Locks held:

3) Getting CPU info

~$ adb shell dumpsys cpuinfo

Output:

Load: 0.08 / 0.4 / 0.64
CPU usage from 42816ms to 34683ms ago:
system_server: 1% = 1% user + 0% kernel / faults: 16 minor
kdebuglog.sh: 0% = 0% user + 0% kernel / faults: 160 minor
tiwlan_wq: 0% = 0% user + 0% kernel
usb_mass_storag: 0% = 0% user + 0% kernel
pvr_workqueue: 0% = 0% user + 0% kernel
+sleep: 0% = 0% user + 0% kernel
+sleep: 0% = 0% user + 0% kernel
TOTAL: 6% = 1% user + 3% kernel + 0% irq

4)Getting memory usage informations

~$ adb shell dumpsys meminfo 'your apps package name'

Output:

** MEMINFO in pid 5527 [com.sec.android.widgetapp.weatherclock] **
                    native   dalvik    other    total
            size:     2868     5767      N/A     8635
       allocated:     2861     2891      N/A     5752
            free:        6     2876      N/A     2882
           (Pss):      532       80     2479     3091
  (shared dirty):      932     2004     6060     8996
    (priv dirty):      512       36     1872     2420

 Objects
           Views:        0        ViewRoots:        0
     AppContexts:        0       Activities:        0
          Assets:        3    AssetManagers:        3
   Local Binders:        2    Proxy Binders:        8
Death Recipients:        0
 OpenSSL Sockets:        0


 SQL
               heap:        0         MEMORY_USED:        0
 PAGECACHE_OVERFLOW:        0         MALLOC_SIZE:        0

If you want see the info for all processes, use ~$ adb shell dumpsys meminfo

enter image description here

dumpsys is ultimately flexible and useful tool!

If you want to use this tool do not forget to add permission into your android manifest automatically android.permission.DUMP

Try to test all commands to learn more about dumpsys. Happy dumping!

Rails 4: before_filter vs. before_action

As we can see in ActionController::Base, before_action is just a new syntax for before_filter.

However all before_filters syntax are deprecated in Rails 5.0 and will be removed in Rails 5.1

How to check whether a variable is a class or not?

class Foo: is called old style class and class X(object): is called new style class.

Check this What is the difference between old style and new style classes in Python? . New style is recommended. Read about "unifying types and classes"

Extracting text OpenCV

You can utilize a python implementation SWTloc.

Full Disclosure : I am the author of this library

To do that :-

First and Second Image

Notice that the text_mode here is 'lb_df', which stands for Light Background Dark Foreground i.e the text in this image is going to be in darker color than the background

from swtloc import SWTLocalizer
from swtloc.utils import imgshowN, imgshow

swtl = SWTLocalizer()
# Stroke Width Transform
swtl.swttransform(imgpaths='img1.jpg', text_mode = 'lb_df',
                  save_results=True, save_rootpath = 'swtres/',
                  minrsw = 3, maxrsw = 20, max_angledev = np.pi/3)
imgshow(swtl.swtlabelled_pruned13C)

# Grouping
respacket=swtl.get_grouped(lookup_radii_multiplier=0.9, ht_ratio=3.0)
grouped_annot_bubble = respacket[2]
maskviz = respacket[4]
maskcomb  = respacket[5]

# Saving the results
_=cv2.imwrite('img1_processed.jpg', swtl.swtlabelled_pruned13C)
imgshowN([maskcomb, grouped_annot_bubble], savepath='grouped_img1.jpg')

Third Image

Notice that the text_mode here is 'db_lf', which stands for Dark Background Light Foreground i.e the text in this image is going to be in lighter color than the background

from swtloc import SWTLocalizer
from swtloc.utils import imgshowN, imgshow

swtl = SWTLocalizer()
# Stroke Width Transform
swtl.swttransform(imgpaths=imgpaths[1], text_mode = 'db_lf',
              save_results=True, save_rootpath = 'swtres/',
              minrsw = 3, maxrsw = 20, max_angledev = np.pi/3)
imgshow(swtl.swtlabelled_pruned13C)

# Grouping
respacket=swtl.get_grouped(lookup_radii_multiplier=0.9, ht_ratio=3.0)
grouped_annot_bubble = respacket[2]
maskviz = respacket[4]
maskcomb  = respacket[5]

# Saving the results
_=cv2.imwrite('img1_processed.jpg', swtl.swtlabelled_pruned13C)
imgshowN([maskcomb, grouped_annot_bubble], savepath='grouped_img1.jpg')

You will also notice that the grouping done is not so accurate, to get the desired results as the images might vary, try to tune the grouping parameters in swtl.get_grouped() function.

How to create a link to another PHP page

Easiest:

<a href="page2.php">Link</a>

And if you need to pass a value:

<a href="page2.php?val=1">Link that pass the value 1</a>

To retrive the value put in page2.php this code:

<?php
$val = $_GET["val"];
?>

Now the variable $val has the value 1.

Using ADB to capture the screen

To save to a file on Windows, OSX and Linux

adb exec-out screencap -p > screen.png

To copy to clipboard on Linux use

adb exec-out screencap -p | xclip -t image/png

Is it possible to open a Windows Explorer window from PowerShell?

Use:

ii .

which is short for

Invoke-Item .

It is one of the most common things I type at the PowerShell command line.

JSF(Primefaces) ajax update of several elements by ID's

If the to-be-updated component is not inside the same NamingContainer component (ui:repeat, h:form, h:dataTable, etc), then you need to specify the "absolute" client ID. Prefix with : (the default NamingContainer separator character) to start from root.

<p:ajax process="@this" update="count :subTotal"/>

To be sure, check the client ID of the subTotal component in the generated HTML for the actual value. If it's inside for example a h:form as well, then it's prefixed with its client ID as well and you would need to fix it accordingly.

<p:ajax process="@this" update="count :formId:subTotal"/>

Space separation of IDs is more recommended as <f:ajax> doesn't support comma separation and starters would otherwise get confused.

How can I style a PHP echo text?

Echo inside an HTML element with class and style the element:

echo "<span class='name'>" . $ip['cityName'] . "</span>";

Could not find the main class, program will exit

Check out doing this way (works on my machine):

let the file be x.java

compile the file javac x.java
jar cfe k.jar x x.class //k.jar is jar file
java -jar k.jar

Volatile vs. Interlocked vs. lock

Either lock or interlocked increment is what you are looking for.

Volatile is definitely not what you're after - it simply tells the compiler to treat the variable as always changing even if the current code path allows the compiler to optimize a read from memory otherwise.

e.g.

while (m_Var)
{ }

if m_Var is set to false in another thread but it's not declared as volatile, the compiler is free to make it an infinite loop (but doesn't mean it always will) by making it check against a CPU register (e.g. EAX because that was what m_Var was fetched into from the very beginning) instead of issuing another read to the memory location of m_Var (this may be cached - we don't know and don't care and that's the point of cache coherency of x86/x64). All the posts earlier by others who mentioned instruction reordering simply show they don't understand x86/x64 architectures. Volatile does not issue read/write barriers as implied by the earlier posts saying 'it prevents reordering'. In fact, thanks again to MESI protocol, we are guaranteed the result we read is always the same across CPUs regardless of whether the actual results have been retired to physical memory or simply reside in the local CPU's cache. I won't go too far into the details of this but rest assured that if this goes wrong, Intel/AMD would likely issue a processor recall! This also means that we do not have to care about out of order execution etc. Results are always guaranteed to retire in order - otherwise we are stuffed!

With Interlocked Increment, the processor needs to go out, fetch the value from the address given, then increment and write it back -- all that while having exclusive ownership of the entire cache line (lock xadd) to make sure no other processors can modify its value.

With volatile, you'll still end up with just 1 instruction (assuming the JIT is efficient as it should) - inc dword ptr [m_Var]. However, the processor (cpuA) doesn't ask for exclusive ownership of the cache line while doing all it did with the interlocked version. As you can imagine, this means other processors could write an updated value back to m_Var after it's been read by cpuA. So instead of now having incremented the value twice, you end up with just once.

Hope this clears up the issue.

For more info, see 'Understand the Impact of Low-Lock Techniques in Multithreaded Apps' - http://msdn.microsoft.com/en-au/magazine/cc163715.aspx

p.s. What prompted this very late reply? All the replies were so blatantly incorrect (especially the one marked as answer) in their explanation I just had to clear it up for anyone else reading this. shrugs

p.p.s. I'm assuming that the target is x86/x64 and not IA64 (it has a different memory model). Note that Microsoft's ECMA specs is screwed up in that it specifies the weakest memory model instead of the strongest one (it's always better to specify against the strongest memory model so it is consistent across platforms - otherwise code that would run 24-7 on x86/x64 may not run at all on IA64 although Intel has implemented similarly strong memory model for IA64) - Microsoft admitted this themselves - http://blogs.msdn.com/b/cbrumme/archive/2003/05/17/51445.aspx.

Handling a Menu Item Click Event - Android

This code is work for me

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    int id = item.getItemId();

     if (id == R.id.action_settings) {
  // add your action here that you want
        return true;
    }

    else if (id==R.id.login)
     {
         // add your action here that you want
     }


    return super.onOptionsItemSelected(item);
}

Best Way to do Columns in HTML/CSS

I would suggest you to either use <table> or CSS.

CSS is preferred for being more flexible. An example would be:

<!-- of course, you should move the inline CSS style to your stylesheet -->
<!-- main container, width = 70% of page, centered -->
<div id="contentBox" style="margin:0px auto; width:70%">

 <!-- columns divs, float left, no margin so there is no space between column, width=1/3 -->
    <div id="column1" style="float:left; margin:0; width:33%;">
     CONTENT
    </div>

    <div id="column2" style="float:left; margin:0;width:33%;">
     CONTENT
    </div>

    <div id="column3" style="float:left; margin:0;width:33%">
     CONTENT
    </div>
</div>

jsFiddle: http://jsfiddle.net/ndhqM/

Using float:left would make 3 columns stick to each other, coming in from left inside the centered div "content box".

Error occurred during initialization of VM (java/lang/NoClassDefFoundError: java/lang/Object)

I faced the same problem,Eclipse splash screen for a second and it disappears.Then i noticed due to auto update of java there are two java version installed in my system. when i uninstalled one eclipse started working.

Thanks you..

Difference between setUp() and setUpBeforeClass()

From the Javadoc:

Sometimes several tests need to share computationally expensive setup (like logging into a database). While this can compromise the independence of tests, sometimes it is a necessary optimization. Annotating a public static void no-arg method with @BeforeClass causes it to be run once before any of the test methods in the class. The @BeforeClass methods of superclasses will be run before those the current class.

react button onClick redirect page

A simple click handler on the button, and setting window.location.hash will do the trick, assuming that your destination is also within the app.

You can listen to the hashchange event on window, parse the URL you get, call this.setState(), and you have your own simple router, no library needed.

class LoginLayout extends Component {
    constuctor() {
      this.handlePageChange = this.handlePageChange.bind(this);
      this.handleRouteChange = this.handleRouteChange.bind(this);
      this.state = { page_number: 0 }
    }

  handlePageChange() {
    window.location.hash = "#/my/target/url";
  }

  handleRouteChange(event) {
    const destination = event.newURL;
    // check the URL string, or whatever other condition, to determine
    // how to set internal state.
    if (some_condition) {
      this.setState({ page_number: 1 });
    }
  }

  componentDidMount() {
    window.addEventListener('hashchange', this.handleRouteChange, false);
  }

  render() {
    // @TODO: check this.state.page_number and render the correct page.
    return (
      <div className="app flex-row align-items-center">
        <Container>
          ...
                <Row>
                  <Col xs="6">                      
                    <Button 
                       color="primary"
                       className="px-4"
                       onClick={this.handlePageChange}
                    >
                        Login
                     </Button>
                  </Col>
                  <Col xs="6" className="text-right">
                    <Button color="link" className="px-0">Forgot password </Button>
                  </Col>
                </Row>
           ...
        </Container>
      </div>
    );
  }
}

What is the difference between Linear search and Binary search?

A linear search looks down a list, one item at a time, without jumping. In complexity terms this is an O(n) search - the time taken to search the list gets bigger at the same rate as the list does.

A binary search is when you start with the middle of a sorted list, and see whether that's greater than or less than the value you're looking for, which determines whether the value is in the first or second half of the list. Jump to the half way through the sublist, and compare again etc. This is pretty much how humans typically look up a word in a dictionary (although we use better heuristics, obviously - if you're looking for "cat" you don't start off at "M"). In complexity terms this is an O(log n) search - the number of search operations grows more slowly than the list does, because you're halving the "search space" with each operation.

As an example, suppose you were looking for U in an A-Z list of letters (index 0-25; we're looking for the value at index 20).

A linear search would ask:

list[0] == 'U'? No.
list[1] == 'U'? No.
list[2] == 'U'? No.
list[3] == 'U'? No.
list[4] == 'U'? No.
list[5] == 'U'? No.
... list[20] == 'U'? Yes. Finished.

The binary search would ask:

Compare list[12] ('M') with 'U': Smaller, look further on. (Range=13-25)
Compare list[19] ('T') with 'U': Smaller, look further on. (Range=20-25)
Compare list[22] ('W') with 'U': Bigger, look earlier. (Range=20-21)
Compare list[20] ('U') with 'U': Found it! Finished.

Comparing the two:

Binary search requires the input data to be sorted; linear search doesn't
Binary search requires an ordering comparison; linear search only requires equality comparisons
Binary search has complexity O(log n); linear search has complexity O(n) as discussed earlier
Binary search requires random access to the data; linear search only requires sequential access (this can be very important - it means a linear search can stream data of arbitrary size)

How can I force clients to refresh JavaScript files?

A simple trick that works fine for me to prevent conflicts between older and newer javascript files. That means: If there is a conflict and some error occurs, the user will be prompted to press Ctrl-F5.

At the top of the page add something like

<h1 id="welcome"> Welcome to this page <span style="color:red">... press Ctrl-F5</span></h1>

looking like

Let this line of javascript be the last to be executed when loading the page:

document.getElementById("welcome").innerHTML = "Welcome to this page"

In case that no error occurs the welcome greeting above will hardly be visible and almost immediately be replaced by

Is there any free OCR library for Android?

OCR can be pretty CPU intensive, you might want to reconsider doing it on a smart phone.

That aside, to my knowledge the popular OCR libraries are Aspire and Tesseract. Neither are straight up Java, so you're not going to get a drop-in Android OCR library.

However, Tesseract is open source (GitHub hosted infact); so you can throw some time at porting the subset you need to Java. My understanding is its not insane C++, so depending on how badly you need OCR it might be worth the time.

So short answer: No.

Long answer: if you're willing to work for it.

How can I delete all cookies with JavaScript?

Why do you use new Date instead of a static UTC string?

    function clearListCookies(){
    var cookies = document.cookie.split(";");
        for (var i = 0; i < cookies.length; i++){   
            var spcook =  cookies[i].split("=");
            document.cookie = spcook[0] + "=;expires=Thu, 21 Sep 1979 00:00:01 UTC;";                                
        }
    }

Fast ceiling of an integer division in C / C++

Compile with O3, The compiler performs optimization well.

q = x / y;
if (x % y)  ++q;

Alert handling in Selenium WebDriver (selenium 2) with Java

This is what worked for me using Explicit Wait from here WebDriver: Advanced Usage

public void checkAlert() {
    try {
        WebDriverWait wait = new WebDriverWait(driver, 2);
        wait.until(ExpectedConditions.alertIsPresent());
        Alert alert = driver.switchTo().alert();
        alert.accept();
    } catch (Exception e) {
        //exception handling
    }
}

How to: "Separate table rows with a line"

Style the row-element with css:

border-bottom: 1px solid black;

How do I get the raw request body from the Request.Content object using .net 4 api endpoint

In your comment on @Kenneth's answer you're saying that ReadAsStringAsync() is returning empty string.

That's because you (or something - like model binder) already read the content, so position of internal stream in Request.Content is on the end.

What you can do is this:

public static string GetRequestBody()
{
    var bodyStream = new StreamReader(HttpContext.Current.Request.InputStream);
    bodyStream.BaseStream.Seek(0, SeekOrigin.Begin);
    var bodyText = bodyStream.ReadToEnd();
    return bodyText;
}

Compare two Lists for differences

This solution produces a result list, that contains all differences from both input lists. You can compare your objects by any property, in my example it is ID. The only restriction is that the lists should be of the same type:

var DifferencesList = ListA.Where(x => !ListB.Any(x1 => x1.id == x.id))
            .Union(ListB.Where(x => !ListA.Any(x1 => x1.id == x.id)));

Pass data to layout that are common to all pages

You don't have to mess with actions or change the model, just use a base controller and cast the existing controller from the layout viewcontext.

Create a base controller with the desired common data (title/page/location etc) and action initialization...

public abstract class _BaseController:Controller {
    public Int32 MyCommonValue { get; private set; }

    protected override void OnActionExecuting(ActionExecutingContext filterContext) {

        MyCommonValue = 12345;

        base.OnActionExecuting(filterContext);
    }
}

Make sure every controller uses the base controller...

public class UserController:_BaseController {...

Cast the existing base controller from the view context in your _Layout.cshml page...

@{
    var myController = (_BaseController)ViewContext.Controller;
}

Now you can refer to values in your base controller from your layout page.

@myController.MyCommonValue

UPDATE

You could also create a page extension that would allow you to use this.

//Allows typed "this.Controller()." in cshtml files
public static class MyPageExtensions {
    public static _BaseController Controller(this WebViewPage page) => Controller<_BaseController>(page);
    public static T Controller<T>(this WebViewPage page) where T : _BaseController => (T)page.ViewContext.Controller;
}

Then you only have to remember to use this.Controller() when you want the controller.

@{
    var myController = this.Controller(); //_BaseController
}

or specific controller that inherits from _BaseController...

@{
    var myController = this.Controller<MyControllerType>();
}

Server is already running in Rails

TL;DR Just Run this command to Kill it

sudo kill -9 $(lsof -i :3000 -t)

Root Cause: Because PID is locked in a file and web server thinks that if that file exists then it means it is already running. Normally when a web server is closed that file is deleted, but in some cases, proper deletion doesn't happen so you have to remove the file manually New Solutions

when you run rails s

=> Booting WEBrick

=> Rails 4.0.4 application starting in development on http://0.0.0.0:3000

=> Run rails server -h for more startup options

=> Ctrl-C to shutdown server

A server is already running. Check /your_project_path/tmp/pids/server.pid. Exiting

So place your path shown here /your_project_path/tmp/pids/server.pid

and remove this server.pid file:

rm /your_project_path/tmp/pids/server.pid

OR Incase you're server was detached then follow below guidelines:

If you detached you rails server by using command "rails -d" then,

Remove rails detached server by using command

ps -aef | grep rails

OR by this command

sudo lsof -wni tcp:3000

then

kill -9 pID

OR use this command

To find and kill process by port name on which that program is running. For 3000 replace port on which your program is running.

sudo kill -9 $(lsof -i :3000 -t)

Old Solution:

rails s -p 4000 -P tmp/pids/server2.pid

Also you can find this post for more options Rails Update to 3.2.11 breaks running multiple servers

How to drop rows of Pandas DataFrame whose value in a certain column is NaN

Don't drop, just take the rows where EPS is not NA:

df = df[df['EPS'].notna()]

How to check that an element is in a std::set?

//general Syntax

       set<int>::iterator ii = find(set1.begin(),set1.end(),"element to be searched");

/* in below code i am trying to find element 4 in and int set if it is present or not*/

set<int>::iterator ii = find(set1.begin(),set1.end(),4);
 if(ii!=set1.end())
 {
    cout<<"element found";
    set1.erase(ii);// in case you want to erase that element from set.
 }

What happens when a duplicate key is put into a HashMap?

I always used:

HashMap<String, ArrayList<String>> hashy = new HashMap<String, ArrayList<String>>();

if I wanted to apply multiple things to one identifying key.

public void MultiHash(){
    HashMap<String, ArrayList<String>> hashy = new HashMap<String, ArrayList<String>>();
    String key = "Your key";

    ArrayList<String> yourarraylist = hashy.get(key);

    for(String valuessaved2key : yourarraylist){
        System.out.println(valuessaved2key);
    }

}

you could always do something like this and create yourself a maze!

public void LOOK_AT_ALL_THESE_HASHMAPS(){
    HashMap<String, HashMap<String, HashMap<String, HashMap<String, String>>>> theultimatehashmap = new HashMap <String, HashMap<String, HashMap<String, HashMap<String, String>>>>();
    String ballsdeep_into_the_hashmap = theultimatehashmap.get("firststring").get("secondstring").get("thirdstring").get("forthstring");
}

Unsupported method: BaseConfig.getApplicationIdSuffix()

For Android Studio 3 I need to update two files to fix the error:--

1. app/build.gradle

buildscript {
    repositories {
        jcenter()
        mavenCentral()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.1'
    }
}

2. app/gradle/wrapper/gradle-wrapper.properties

distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

What do 'real', 'user' and 'sys' mean in the output of time(1)?

In very simple terms, I like to think about it like this:

real is the actual amount of time it took to run the command (as if you had timed it with a stopwatch)
user and sys are how much 'work' the CPU had to do to execute the command. This 'work' is expressed in units of time.

Generally speaking:

user is how much work the CPU did to run to run the command's code
sys is how much work the CPU had to do to handle 'system overhead' type tasks (such as allocating memory, file I/O, ect.) in order to support the running command

Since these last two times are counting 'work' done, they don't include time a thread might have spent waiting (such as waiting on another process or for disk I/O to finish).

real, however, is a measure of actual runtime and not 'work', so it does include any time spent waiting.

How Do I Take a Screen Shot of a UIView?

-(UIImage *)convertViewToImage
{
    UIGraphicsBeginImageContext(self.bounds.size);
    [self drawViewHierarchyInRect:self.bounds afterScreenUpdates:YES];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

  return image;
}

What do I use on linux to make a python program executable

If one want to make executable hello.py

first find the path where python is in your os with : which python

it usually resides under "/usr/bin/python" folder.

at the very first line of hello.py one should add : #!/usr/bin/python

then through linux command chmod

one should just make it executable like : chmod +x hello.py

and execute with ./hello.py

Dump Mongo Collection into JSON format

If you want to dump all collections, run this command:

mongodump -d {DB_NAME}   -o /tmp

It will generate all collections data in json and bson extensions into /tmp/{DB_NAME} directory

Which keycode for escape key with jQuery

Try with the keyup event:

$(document).keyup(function(e) {
  if (e.keyCode === 13) $('.save').click();     // enter
  if (e.keyCode === 27) $('.cancel').click();   // esc
});

Input button target="_blank" isn't causing the link to load in a new window/tab

Facing a similar problem, I solved it this way:

<a href="http://www.google.com/" target="_top" style="text-decoration:none"><button id="back">Back</button></a>

Change _top with _blank if this is what you need.

Tools for making latex tables in R

You can also use the latextable function from the R package micsFuncs:

http://cran.r-project.org/web/packages/miscFuncs/index.html

latextable(M) where M is a matrix with mixed alphabetic and numeric entries outputs a basic LaTeX table onto screen, which can be copied and pasted into a LaTeX document. Where there are small numbers, it also replaces these with index notation (eg 1.2x10^{-3}).

Key Presses in Python

There's a solution:

import pyautogui
for i in range(1000):
    pyautogui.typewrite("a")

How to check string length and then select substring in Sql Server

To conditionally check the length of the string, use CASE.

SELECT  CASE WHEN LEN(comments) <= 60 
             THEN comments
             ELSE LEFT(comments, 60) + '...'
        END  As Comments
FROM    myView

SQLFiddle Demo

Why is there an unexplainable gap between these inline-block div elements?

Using inline-block allows for white-space in your HTML, This usually equates to .25em (or 4px).

You can either comment out the white-space or, a more commons solution, is to set the parent's font-size to 0 and the reset it back to the required size on the inline-block elements.

Java String array: is there a size of method?

Yes, .length (property-like, not a method):

String[] array = new String[10];
int size = array.length;

Delete files or folder recursively on Windows CMD

For hidden files I had to use the following:

DEL /S /Q /A:H Thumbs.db

Can I dynamically add HTML within a div tag from C# on load event?

Use asp:Panel for that. It translates into a div.

Does JavaScript have a built in stringbuilder class?

When I find myself doing a lot of string concatenation in JavaScript, I start looking for templating. Handlebars.js works quite well keeping the HTML and JavaScript more readable. http://handlebarsjs.com

Disable Copy or Paste action for text box?

You might also need to provide your user with an alert showing that those functions are disabled for the text input fields. This will work

_x000D_

    function showError(){_x000D_
     alert('you are not allowed to cut,copy or paste here');_x000D_
    }_x000D_
    _x000D_
    $('.form-control').bind("cut copy paste",function(e) {_x000D_
     e.preventDefault();_x000D_
    });

_x000D_

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>_x000D_
<textarea class="form-control"  oncopy="showError()" onpaste="showError()"></textarea>

_x000D_

How to add a TextView to LinearLayout in Android

Here's where the exception occurs

((LinearLayout) linearLayout).addView(valueTV);

addView method takes in a parameter of type View, not TextView. Therefore, typecast the valueTv object into a View object, explicitly.

Therefore, the corrected code would be :

((LinearLayout) linearLayout).addView((TextView)valueTV);

A Parser-blocking, cross-origin script is invoked via document.write - how to circumvent it?

According to Google Developers article, you can:

Use asynchronous script loading, using <script src="..." async> or element.appendChild(),
Submit the script provider to Google for whitelisting.

Python & Matplotlib: Make 3D plot interactive in Jupyter Notebook

There is a new library called ipyvolume that may do what you want, the documentation shows live demos. The current version doesn't do meshes and lines, but master from the git repo does (as will version 0.4). (Disclaimer: I'm the author)

Nesting queries in SQL

If it has to be "nested", this would be one way, to get your job done:

SELECT o.name AS country, o.headofstate 
FROM   country o
WHERE  o.headofstate like 'A%'
AND   (
    SELECT i.population
    FROM   city i
    WHERE  i.id = o.capital
    ) > 100000

A JOIN would be more efficient than a correlated subquery, though. Can it be, that who ever gave you that task is not up to speed himself?

Gradle task - pass arguments to Java application

If you want to use the same set of arguments all the time, the following is all you need.

run {
    args = ["--myarg1", "--myarg2"]
}

Getting the number of filled cells in a column (VBA)

To find the last filled column use the following :

lastColumn = ActiveSheet.Cells(1, Columns.Count).End(xlToLeft).Column

Cocoa Touch: How To Change UIView's Border Color And Thickness?

Try this code:

view.layer.borderColor =  [UIColor redColor].CGColor;
view.layer.borderWidth= 2.0;
[view setClipsToBounds:YES];

Data truncation: Data too long for column 'logo' at row 1

Following solution worked for me. When connecting to the db, specify that data should be truncated if they are too long (jdbcCompliantTruncation). My link looks like this:

jdbc:mysql://SERVER:PORT_NO/SCHEMA?sessionVariables=sql_mode='NO_ENGINE_SUBSTITUTION'&jdbcCompliantTruncation=false

If you increase the size of the strings, you may face the same problem in future if the string you are attempting to store into the DB is longer than the new size.

EDIT: STRICT_TRANS_TABLES has to be removed from sql_mode as well.

How to make Git "forget" about a file that was tracked but is now in .gitignore?

git ls-files --ignored --exclude-standard -z | xargs -0 git rm --cached
git commit -am "Remove ignored files"

This takes the list of the ignored files and removes them from the index, then commits the changes.

C# equivalent of C++ vector, with contiguous memory?

use List<T>. Internally it uses arrays and arrays do use contiguous memory.

Multiple github accounts on the same computer?

Use HTTPS:

change remote url to https:

git remote set-url origin https://[email protected]/USERNAME/PROJECTNAME.git

and you are good to go:

git push

To ensure that the commits appear as performed by USERNAME, one can setup the user.name and user.email for this project, too:

git config user.name USERNAME
git config user.email [email protected]

Html.BeginForm and adding properties

I know this is old but you could create a custom extension if you needed to create that form over and over:

public static MvcForm BeginMultipartForm(this HtmlHelper htmlHelper)
{
    return htmlHelper.BeginForm(null, null, FormMethod.Post, 
     new Dictionary<string, object>() { { "enctype", "multipart/form-data" } });
}

Usage then just becomes

<% using(Html.BeginMultipartForm()) { %>

Doctrine2: Best way to handle many-to-many with extra columns in reference table

I've opened a similar question in the Doctrine user mailing list and got a really simple answer;

consider the many to many relation as an entity itself, and then you realize you have 3 objects, linked between them with a one-to-many and many-to-one relation.

http://groups.google.com/group/doctrine-user/browse_thread/thread/d1d87c96052e76f7/436b896e83c10868#436b896e83c10868

Once a relation has data, it's no more a relation !

Recording video feed from an IP camera over a network

Motion is an alternative to Zoneminder. It has a steeper setup curve as everything is configured via config files.However, the config files are nicely commented and it's easier than it sounds. It's very reliable once running as well.

To add a Foscam camera (mentioned above) use the following syntax to stream the video from the camera.

netcam_url http://<IPADDRESS>/videostream.cgi?user=admin?pwd=

Where the user is admin with a blank password (the default for Foscam cameras).

For really high uptime/reliablity consider using a monitoring tool such as Monit. This works well with Motion.

Define static method in source-file with declaration in header-file in C++

You don't need to have static in function definition

Splitting strings using a delimiter in python

So, your input is 'dan|warrior|54' and you want "warrior". You do this like so:

>>> dan = 'dan|warrior|54'
>>> dan.split('|')[1]
"warrior"

Removing page title and date when printing web page (with CSS?)

Its simple. Just use css.

<style>
@page { size: auto;  margin: 0mm; }
</style>

How to set combobox default value?

Suppose you bound your combobox to a List<Person>

List<Person> pp = new List<Person>();
pp.Add(new Person() {id = 1, name="Steve"});
pp.Add(new Person() {id = 2, name="Mark"});
pp.Add(new Person() {id = 3, name="Charles"});

cbo1.DisplayMember = "name";
cbo1.ValueMember = "id";
cbo1.DataSource = pp;

At this point you cannot set the Text property as you like, but instead you need to add an item to your list before setting the datasource

pp.Insert(0, new Person() {id=-1, name="--SELECT--"});
cbo1.DisplayMember = "name";
cbo1.ValueMember = "id";
cbo1.DataSource = pp;
cbo1.SelectedIndex = 0;

Of course this means that you need to add a checking code when you try to use the info from the combobox

if(cbo1.SelectedValue != null && Convert.ToInt32(cbo1.SelectedValue) == -1)
    MessageBox.Show("Please select a person name");
else
    ......

The code is the same if you use a DataTable instead of a list. You need to add a fake row at the first position of the Rows collection of the datatable and set the initial index of the combobox to make things clear. The only thing you need to look at are the name of the datatable columns and which columns should contain a non null value before adding the row to the collection

In a table with three columns like ID, FirstName, LastName with ID,FirstName and LastName required you need to

DataRow row = datatable.NewRow();
row["ID"] = -1;
row["FirstName"] = "--Select--";    
row["LastName"] = "FakeAddress";
dataTable.Rows.InsertAt(row, 0);

How to initialise a string from NSData in Swift

Swift 2.0

It seems that Swift 2.0 has actually introduced the String(data:encoding:) as an String extension when you import Foundation. I haven't found any place where this is documented, weirdly enough.

(pre Swift 2.0) Lightweight extension

Here's a copy-pasteable little extension without using NSString, let's cut the middle-man.

import Foundation

extension NSData
{
    var byteBuffer : UnsafeBufferPointer<UInt8> { get { return UnsafeBufferPointer<UInt8>(start: UnsafeMutablePointer<UInt8>(self.bytes), count: self.length) }}
}

extension String
{
    init?(data : NSData, encoding : NSStringEncoding)
    {
        self.init(bytes: data.byteBuffer, encoding: encoding)
    }
}

// Playground test
let original = "Nymphs blitz quick vex dwarf jog"
let encoding = NSASCIIStringEncoding

if let data = original.dataUsingEncoding(encoding)
{
    String(data: data, encoding: encoding)
}

This also give you access to data.byteBuffer which is a sequence type, so all those cool operations you can do with sequences also work, like doing a reduce { $0 &+ $1 } for a checksum.

Notes

In my previous edit, I used this method:

var buffer = Array<UInt8>(count: data.length, repeatedValue: 0x00)
data.getBytes(&buffer, length: data.length)
self.init(bytes: buffer, encoding: encoding)

The problem with this approach, is that I'm creating a copy of the information into a new array, thus, I'm duplicating the amount of bytes (specifically: encoding size * data.length)

Get an array of list element contents in jQuery

And in clean javascript:

var texts = [], lis = document.getElementsByTagName("li");
for(var i=0, im=lis.length; im>i; i++)
  texts.push(lis[i].firstChild.nodeValue);

alert(texts);

Timing Delays in VBA

If you are in Excel VBA you can use the following.

Application.Wait(Now + TimeValue("0:00:01"))

(The time string should look like H:MM:SS.)

What difference does .AsNoTracking() make?

If you have something else altering the DB (say another process) and need to ensure you see these changes, use AsNoTracking(), otherwise EF may give you the last copy that your context had instead, hence it being good to usually use a new context every query:

http://codethug.com/2016/02/19/Entity-Framework-Cache-Busting/

Most Useful Attributes

// on configuration sections
[ConfigurationProperty] 

// in asp.net
[NotifyParentProperty(true)]

CSS Inset Borders

You may use background-clip: border-box;

Example:

.example {
padding: 2em;
border: 10px solid rgba(51,153,0,0.65);
background-clip: border-box;
background-color: yellow;
}

<div class="example">Example with background-clip: border-box;</div>

How to view UTF-8 Characters in VIM or Gvim

If Japanese people come here, please add the following lines to your ~/.vimrc

set encoding=utf-8
set fileencodings=iso-2022-jp,euc-jp,sjis,utf-8
set fileformats=unix,dos,mac

When to use Hadoop, HBase, Hive and Pig?

Use of Hive, Hbase and Pig w.r.t. my real time experience in different projects.

Hive is used mostly for:

Analytics purpose where you need to do analysis on history data
Generating business reports based on certain columns
Efficiently managing the data together with metadata information
Joining tables on certain columns which are frequently used by using bucketing concept
Efficient Storing and querying using partitioning concept
Not useful for transaction/row level operations like update, delete, etc.

Pig is mostly used for:

Frequent data analysis on huge data
Generating aggregated values/counts on huge data
Generating enterprise level key performance indicators very frequently

Hbase is mostly used:

For real time processing of data
For efficiently managing Complex and nested schema
For real time querying and faster result
For easy Scalability with columns
Useful for transaction/row level operations like update, delete, etc.

Shrink a YouTube video to responsive width

You can make YouTube videos responsive with CSS. Wrap the iframe in a div with the class of "videowrapper" and apply the following styles:

.videowrapper {
    float: none;
    clear: both;
    width: 100%;
    position: relative;
    padding-bottom: 56.25%;
    padding-top: 25px;
    height: 0;
}
.videowrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

The .videowrapper div should be inside a responsive element. The padding on the .videowrapper is necessary to keep the video from collapsing. You may have to tweak the numbers depending upon your layout.

How to restart service using command prompt?

To restart a running service:

net stop "service name" && net start "service name"

However, if you don't know if the service is running in the first place and want to restart or start it, use this:

net stop "service name" & net start "service name"

This works if the service is already running or not.

For reference, here is the documentation on conditional processing symbols.

MySQL - Using If Then Else in MySQL UPDATE or SELECT Queries

Whilst you certainly can use MySQL's IF() control flow function as demonstrated by dbemerlin's answer, I suspect it might be a little clearer to the reader (i.e. yourself, and any future developers who might pick up your code in the future) to use a CASE expression instead:

UPDATE Table
SET    A = CASE
         WHEN A > 0 AND A < 1 THEN 1
         WHEN A > 1 AND A < 2 THEN 2
         ELSE A
       END
WHERE  A IS NOT NULL

Of course, in this specific example it's a little wasteful to set A to itself in the ELSE clause—better entirely to filter such conditions from the UPDATE, via the WHERE clause:

UPDATE Table
SET    A = CASE
         WHEN A > 0 AND A < 1 THEN 1
         WHEN A > 1 AND A < 2 THEN 2
       END
WHERE  (A > 0 AND A < 1) OR (A > 1 AND A < 2)

(The inequalities entail A IS NOT NULL).

Or, if you want the intervals to be closed rather than open (note that this would set values of 0 to 1—if that is undesirable, one could explicitly filter such cases in the WHERE clause, or else add a higher precedence WHEN condition):

UPDATE Table
SET    A = CASE
         WHEN A BETWEEN 0 AND 1 THEN 1
         WHEN A BETWEEN 1 AND 2 THEN 2
       END
WHERE  A BETWEEN 0 AND 2

Though, as dbmerlin also pointed out, for this specific situation you could consider using CEIL() instead:

UPDATE Table SET A = CEIL(A) WHERE A BETWEEN 0 AND 2

Android, How can I Convert String to Date?

It could be a good idea to be careful with the Locale upon which c.getTime().toString(); depends.

One idea is to store the time in seconds (e.g. UNIX time). As an int you can easily compare it, and then you just convert it to string when displaying it to the user.

T-SQL stored procedure that accepts multiple Id values

Try This One:

@list_of_params varchar(20) -- value 1, 2, 5, 7, 20 

SELECT d.[Name]
FROM Department d
where @list_of_params like ('%'+ CONVERT(VARCHAR(10),d.Id)  +'%')

very simple.

calculate the mean for each column of a matrix in R

Another way is to use purrr package

# example data like what is said above

@A Handcart And Mohair

set.seed(1)
m <- data.frame(matrix(sample(100, 20, replace = TRUE), ncol = 4))


library(purrr)
means <- map_dbl(m, mean)

> means
#  X1   X2   X3   X4 
#47.0 64.4 44.8 67.8

What are the differences between struct and class in C++?

. In classes all the members by default are private but in structure members are public by default.
1. There is no term like constructor and destructor for structs, but for class compiler creates default if you don't provide.
2. Sizeof empty structure is 0 Bytes wer as Sizeof empty class is 1 Byte The struct default access type is public. A struct should typically be used for grouping data.
The class default access type is private, and the default mode for inheritance is private. A class should be used for grouping data and methods that operate on that data.

In short, the convention is to use struct when the purpose is to group data, and use classes when we require data abstraction and, perhaps inheritance.

In C++ structures and classes are passed by value, unless explicitly de-referenced. In other languages classes and structures may have distinct semantics - ie. objects (instances of classes) may be passed by reference and structures may be passed by value. Note: There are comments associated with this question. See the discussion page to add to the conversation.

How to remove listview all items

You can do this:

listView.setAdapter(null);

Difference between string object and string literal

There is a subtle differences between String object and string literal.

String s = "abc"; // creates one String object and one reference variable

In this simple case, "abc" will go in the pool and s will refer to it.

String s = new String("abc"); // creates two objects,and one reference variable

In this case, because we used the new keyword, Java will create a new String object in normal (non-pool) memory, and s will refer to it. In addition, the literal "abc" will be placed in the pool.

How to get parameter on Angular2 route in Angular way?

Update: Sep 2019

As a few people have mentioned, the parameters in paramMap should be accessed using the common MapAPI:

To get a snapshot of the params, when you don't care that they may change:

this.bankName = this.route.snapshot.paramMap.get('bank');

To subscribe and be alerted to changes in the parameter values (typically as a result of the router's navigation)

this.route.paramMap.subscribe( paramMap => {
    this.bankName = paramMap.get('bank');
})

Update: Aug 2017

Since Angular 4, params have been deprecated in favor of the new interface paramMap. The code for the problem above should work if you simply substitute one for the other.

Original Answer

If you inject ActivatedRoute in your component, you'll be able to extract the route parameters

    import {ActivatedRoute} from '@angular/router';
    ...
    
    constructor(private route:ActivatedRoute){}
    bankName:string;
    
    ngOnInit(){
        // 'bank' is the name of the route parameter
        this.bankName = this.route.snapshot.params['bank'];
    }

If you expect users to navigate from bank to bank directly, without navigating to another component first, you ought to access the parameter through an observable:

    ngOnInit(){
        this.route.params.subscribe( params =>
            this.bankName = params['bank'];
        )
    }

For the docs, including the differences between the two check out this link and search for "activatedroute"

Why do I get TypeError: can't multiply sequence by non-int of type 'float'?

Maybe this will help others in the future - I had the same error while trying to multiple a float and a list of floats. The thing is that everyone here talked about multiplying a float with a string (but here all my element were floats all along) so the problem was actually using the * operator on a list.

For example:

import math
import numpy as np
alpha = 0.2 
beta=1-alpha
C = (-math.log(1-beta))/alpha

coff = [0.0,0.01,0.0,0.35,0.98,0.001,0.0]
coff *= C

The error:

    coff *= C 
TypeError: can't multiply sequence by non-int of type 'float'

The solution - convert the list to numpy array:

coff = np.asarray(coff) * C

How to install mod_ssl for Apache httpd?

Try installing mod_ssl using following command:

yum install mod_ssl

and then reload and restart your Apache server using following commands:

systemctl reload httpd.service
systemctl restart httpd.service

This should work for most of the cases.

The model backing the <Database> context has changed since the database was created

It means that there were some changes on the context which have not been executed. Please run Add-Migration first to generate the changes that we have done (the changes that we might not aware) And then run Update-Database

Breaking a list into multiple columns in Latex

I've had multenum for "Multi-column enumerated lists" recommended to me, but I've never actually used it myself, yet.

Edit: The syntax doesn't exactly look like you could easily copy+paste lists into the LaTeX code. So, it may not be the best solution for your use case!

Only one expression can be specified in the select list when the subquery is not introduced with EXISTS

Apart from very good responses here, you could try this as well if you want to use your sub query as is.

Approach:

1) Select the desired column (Only 1) from your sub query

2) Use where to map the column name

Code:

 SELECT count(distinct dNum)
 FROM myDB.dbo.AQ
 WHERE A_ID in 
   (
    SELECT A_ID 
    FROM (SELECT DISTINCT TOP (0.1) PERCENT A_ID, COUNT(DISTINCT dNum) AS ud 
          FROM         myDB.dbo.AQ
          WHERE     M > 1 and B = 0 
          GROUP BY A_ID ORDER BY ud DESC
         ) a 
   )

How to change an application icon programmatically in Android?

It's an old question, but still active as there is no explicit Android feature. And the guys from facebook found a work around - somehow. Today, I found a way that works for me. Not perfect (see remarks at the end of this answer) but it works!

Main idea is, that I update the icon of my app's shortcut, created by the launcher on my home screen. When I want to change something on the shortcut-icon, I remove it first and recreate it with a new bitmap.

Here is the code. It has a button increment. When pressed, the shortcut is replaced with one that has a new counting number.

First you need these two permissions in your manifest:

<uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT" />
<uses-permission android:name="com.android.launcher.permission.UNINSTALL_SHORTCUT" />

Then you need this two methods for installing and uninstalling shortcuts. The shortcutAdd method creates a bitmap with a number in it. This is just to demonstrate that it actually changes. You probably want to change that part with something, you want in your app.

private void shortcutAdd(String name, int number) {
    // Intent to be send, when shortcut is pressed by user ("launched")
    Intent shortcutIntent = new Intent(getApplicationContext(), Play.class);
    shortcutIntent.setAction(Constants.ACTION_PLAY);

    // Create bitmap with number in it -> very default. You probably want to give it a more stylish look
    Bitmap bitmap = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);
    Paint paint = new Paint();
    paint.setColor(0xFF808080); // gray
    paint.setTextAlign(Paint.Align.CENTER);
    paint.setTextSize(50);
    new Canvas(bitmap).drawText(""+number, 50, 50, paint);
    ((ImageView) findViewById(R.id.icon)).setImageBitmap(bitmap);

    // Decorate the shortcut
    Intent addIntent = new Intent();
    addIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
    addIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, name);
    addIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON, bitmap);

    // Inform launcher to create shortcut
    addIntent.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
    getApplicationContext().sendBroadcast(addIntent);
}

private void shortcutDel(String name) {
    // Intent to be send, when shortcut is pressed by user ("launched")
    Intent shortcutIntent = new Intent(getApplicationContext(), Play.class);
    shortcutIntent.setAction(Constants.ACTION_PLAY);

    // Decorate the shortcut
    Intent delIntent = new Intent();
    delIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent);
    delIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, name);

    // Inform launcher to remove shortcut
    delIntent.setAction("com.android.launcher.action.UNINSTALL_SHORTCUT");
    getApplicationContext().sendBroadcast(delIntent);
}

And finally, here are two listener to add the first shortcut and update the shortcut with an incrementing counter.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.test);
    findViewById(R.id.add).setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            shortcutAdd("changeIt!", count);
        }
    });
    findViewById(R.id.increment).setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            shortcutDel("changeIt!");
            count++;
            shortcutAdd("changeIt!", count);
        }
    });
}

Remarks:

This way works also if your App controls more shortcuts on the home screen, e.g. with different extra's in the Intent. They just need different names so that the right one is uninstalled and reinstalled.
The programmatical handling of shortcuts in Android is a well known, widely used but not officially supported Android feature. It seems to work on the default launcher and I never tried it anywhere else. So dont blame me, when you get this user-emails "It does not work on my XYZ, double rooted, super blasted phone"
The launcher writes a Toast when a shortcut was installad and one when a shortcut was uninstalled. So I get two Toasts every time I change the icon. This is not perfect, but well, as long as the rest of my app is perfect...

How exactly does the android:onClick XML attribute differ from setOnClickListener?

Check if you forgot to put the method public!

Convert tuple to list and back

List to Tuple and back can be done as below

import ast, sys
input_str = sys.stdin.read()
input_tuple = ast.literal_eval(input_str)

l = list(input_tuple)
l.append('Python')
#print(l)
tuple_2 = tuple(l)

# Make sure to name the final tuple 'tuple_2'
print(tuple_2)

How to install JDK 11 under Ubuntu?

In Ubuntu, you can simply install Open JDK by following commands.

sudo apt-get update    
sudo apt-get install default-jdk

You can check the java version by following the command.

java -version

If you want to install Oracle JDK 8 follow the below commands.

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer

If you want to switch java versions you can try below methods.

vi ~/.bashrc and add the following line export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_221 (path/jdk folder)

sudo vi /etc/profile and add the following lines

#JAVA_HOME=/usr/lib/jvm/jdk1.8.0_221
JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64
export PATH=$JAVA_HOME/bin:$PATH
export JAVA_HOME
export JRE_HOME
export PATH

You can comment on the other version. This needs to sign out and sign back in to use. If you want to try it on the go you can type the below command in the same terminal. It'll only update the java version for a particular terminal.

source /etc/profile

You can always check the java version by java -version command.

Auto detect mobile browser (via user-agent?)

You can detect mobile clients simply through navigator.userAgent , and load alternate scripts based on the detected client type as:

 $(document).ready(function(e) {

        if(navigator.userAgent.match(/Android/i)
          || navigator.userAgent.match(/webOS/i)
          || navigator.userAgent.match(/iPhone/i)
          || navigator.userAgent.match(/iPad/i)
          || navigator.userAgent.match(/iPod/i)
          || navigator.userAgent.match(/BlackBerry/i)
          || navigator.userAgent.match(/Windows Phone/i)) {

         //write code for your mobile clients here.

          var jsScript = document.createElement("script");
          jsScript.setAttribute("type", "text/javascript");
          jsScript.setAttribute("src", "js/alternate_js_file.js");
          document.getElementsByTagName("head")[0].appendChild(jsScript );

          var cssScript = document.createElement("link");
          cssScript.setAttribute("rel", "stylesheet");
          cssScript.setAttribute("type", "text/css");
          cssScript.setAttribute("href", "css/alternate_css_file.css");
          document.getElementsByTagName("head")[0].appendChild(cssScript); 

    }
    else{
         // write code for your desktop clients here
    }

    });

Linux command to check if a shell script is running or not

Check this

ps -ef | grep shellscripname.sh

You can also find your running process in

ps -ef

logout and redirecting session in php

<?php //initialize the session if (!isset($_SESSION)) {   session_start(); } 
// ** Logout the current user. **
$logoutAction = $_SERVER['PHP_SELF']."?doLogout=true";
if ((isset($_SERVER['QUERY_STRING'])) && ($_SERVER['QUERY_STRING'] != "")){
    $logoutAction .= "&". htmlentities($_SERVER['QUERY_STRING']); 
}

if ((isset($_GET['doLogout'])) &&($_GET['doLogout']=="true")) {
    // to fully log out a visitor we need to clear the session variables
    $_SESSION['MM_Username'] = NULL;
    $_SESSION['MM_UserGroup'] = NULL;
    $_SESSION['PrevUrl'] = NULL;
    unset($_SESSION['MM_Username']);  
    unset($_SESSION['MM_UserGroup']);
    unset($_SESSION['PrevUrl']);
    $logoutGoTo = "index.php";

    if ($logoutGoTo) {
        header("Location: $logoutGoTo");
        exit;
    }
} ?>

Shell Script — Get all files modified after <date>

If you have GNU find, then there are a legion of relevant options. The only snag is that the interface to them is less than stellar:

-mmin n (modification time in minutes)
-mtime n (modification time in days)
-newer file (modification time newer than modification time of file)
-daystart (adjust start time from current time to start of day)
Plus alternatives for access time and 'change' or 'create' time.

The hard part is determining the number of minutes since a time.

One option worth considering: use touch to create a file with the required modification time stamp; then use find with -newer.

touch -t 200901031231.43 /tmp/wotsit
find . -newer /tmp/wotsit -print
rm -f /tmp/wotsit

This looks for files newer than 2009-01-03T12:31:43. Clearly, in a script, /tmp/wotsit would be a name with the PID or other value to make it unique; and there'd be a trap to ensure it gets removed even if the user interrupts, and so on and so forth.

How to make a TextBox accept only alphabetic characters?

This solution uses regular expressions, does not allow invalid characters to be pasted into the text box and maintains the cursor position.

using System.Text.RegularExpressions;

int CursorWas;
string WhatItWas;

private void textBox1_Enter(object sender, EventArgs e)
    {
        WhatItWas = textBox1.Text;
    }

private void textBox1_TextChanged(object sender, EventArgs e)
    {
        if (Regex.IsMatch(textBox1.Text, "^[a-zA-Z ]*$"))
        {
            WhatItWas = textBox1.Text;
        }
        else
        {
            CursorWas = textBox1.SelectionStart == 0 ? 0 : textBox1.SelectionStart - 1;
            textBox1.Text = WhatItWas;
            textBox1.SelectionStart = CursorWas;
        }
    }

Note: textBox1_TextChanged recursive call.

Reset the graphical parameters back to default values without use of dev.off()

How to develop or migrate apps for iPhone 5 screen resolution?

Download and install latest version of Xcode.
Set a Launch Screen File for your app (in the general tab of your target settings). This is how you get to use the full size of any screen, including iPad split view sizes in iOS 9.
Test your app, and hopefully do nothing else, since everything should work magically if you had set auto resizing masks properly, or used Auto Layout.
If you didn't, adjust your view layouts, preferably with Auto Layout.
If there is something you have to do for the larger screens specifically, then it looks like you have to check height of [[UIScreen mainScreen] bounds] as there seems to be no specific API for that. As of iOS 8 there are also size classes that abstract screen sizes into regular or compact vertically and horizontally and are recommended way to adapt your UI.

Specifying width and height as percentages without skewing photo proportions in HTML

Note: it is invalid to provide percentages directly as <img> width or height attribute unless you're using HTML 4.01 (see current spec, obsolete spec and this answer for more details). That being said, browsers will often tolerate such behaviour to support backwards-compatibility.

Those percentage widths in your 2nd example are actually applying to the container your <img> is in, and not the image's actual size. Say you have the following markup:

<div style="width: 1000px; height: 600px;">
    <img src="#" width="50%" height="50%">
</div>

Your resulting image will be 500px wide and 300px tall.

jQuery Resize

If you're trying to reduce an image to 50% of its width, you can do it with a snippet of jQuery:

$( "img" ).each( function() {
    var $img = $( this );
    $img.width( $img.width() * .5 );
});

Just make sure you take off any height/width = 50% attributes first.

How to get a DOM Element from a JQuery Selector

If you need to interact directly with the DOM element, why not just use document.getElementById since, if you are trying to interact with a specific element you will probably know the id, as assuming that the classname is on only one element or some other option tends to be risky.

But, I tend to agree with the others, that in most cases you should learn to do what you need using what jQuery gives you, as it is very flexible.

UPDATE: Based on a comment: Here is a post with a nice explanation: http://www.mail-archive.com/[email protected]/msg04461.html

$(this).attr("checked") ? $(this).val() : 0

This will return the value if it's checked, or 0 if it's not.

$(this).val() is just reaching into the dom and getting the attribute "value" of the element, whether or not it's checked.

Integrating CSS star rating into an HTML form

CSS:

.rate-container > i {
    float: right;
}

.rate-container > i:HOVER,
.rate-container > i:HOVER ~ i {
    color: gold;
}

HTML:

<div class="rate-container">
    <i class="fa fa-star "></i>
    <i class="fa fa-star "></i>
    <i class="fa fa-star "></i>
    <i class="fa fa-star "></i>
    <i class="fa fa-star "></i>
</div>

How to automatically reload a page after a given period of inactivity

I have built a complete javascript solution as well that does not require jquery. Might be able to turn it into a plugin. I use it for fluid auto-refreshing, but it looks like it could help you here.

JSFiddle AutoRefresh

// Refresh Rate is how often you want to refresh the page 
// bassed off the user inactivity. 
var refresh_rate = 200; //<-- In seconds, change to your needs
var last_user_action = 0;
var has_focus = false;
var lost_focus_count = 0;
// If the user loses focus on the browser to many times 
// we want to refresh anyway even if they are typing. 
// This is so we don't get the browser locked into 
// a state where the refresh never happens.    
var focus_margin = 10; 

// Reset the Timer on users last action
function reset() {
    last_user_action = 0;
    console.log("Reset");
}

function windowHasFocus() {
    has_focus = true;
}

function windowLostFocus() {
    has_focus = false;
    lost_focus_count++;
    console.log(lost_focus_count + " <~ Lost Focus");
}

// Count Down that executes ever second
setInterval(function () {
    last_user_action++;
    refreshCheck();
}, 1000);

// The code that checks if the window needs to reload
function refreshCheck() {
    var focus = window.onfocus;
    if ((last_user_action >= refresh_rate && !has_focus && document.readyState == "complete") || lost_focus_count > focus_margin) {
        window.location.reload(); // If this is called no reset is needed
        reset(); // We want to reset just to make sure the location reload is not called.
    }

}
window.addEventListener("focus", windowHasFocus, false);
window.addEventListener("blur", windowLostFocus, false);
window.addEventListener("click", reset, false);
window.addEventListener("mousemove", reset, false);
window.addEventListener("keypress", reset, false);
window.addEventListener("scroll", reset, false);
document.addEventListener("touchMove", reset, false);
document.addEventListener("touchEnd", reset, false);

How to return value from Action()?

Your static method should go from:

public static class SimpleUsing
{
    public static void DoUsing(Action<MyDataContext> action)
    {
        using (MyDataContext db = new MyDataContext())
           action(db);
    }
}

To:

public static class SimpleUsing
{
    public static TResult DoUsing<TResult>(Func<MyDataContext, TResult> action)
    {
        using (MyDataContext db = new MyDataContext())
           return action(db);
    }
}

This answer grew out of comments so I could provide code. For a complete elaboration, please see @sll's answer below.

Compare and contrast REST and SOAP web services?

SOAP uses WSDL for communication btw consumer and provider, whereas REST just uses XML or JSON to send and receive data

WSDL defines contract between client and service and is static by its nature. In case of REST contract is somewhat complicated and is defined by HTTP, URI, Media Formats and Application Specific Coordination Protocol. It's highly dynamic unlike WSDL.

SOAP doesn't return human readable result, whilst REST result is readable with is just plain XML or JSON

This is not true. Plain XML or JSON are not RESTful at all. None of them define any controls(i.e. links and link relations, method information, encoding information etc...) which is against REST as far as messages must be self contained and coordinate interaction between agent/client and service.

With links + semantic link relations clients should be able to determine what is next interaction step and follow these links and continue communication with service.

It is not necessary that messages be human readable, it's possible to use cryptic format and build perfectly valid REST applications. It doesn't matter whether message is human readable or not.

Thus, plain XML(application/xml) or JSON(application/json) are not sufficient formats for building REST applications. It's always reasonable to use subset of these generic media types which have strong semantic meaning and offer enough control information(links etc...) to coordinate interactions between client and server.

For more details regarding control information I highly recommend to read this: http://www.amundsen.com/hypermedia/hfactor/
Web Linking: http://tools.ietf.org/html/rfc5988
Registered link relations: http://www.iana.org/assignments/link-relations/link-relations.xml

REST is over only HTTP

Not true, HTTP is most widely used and when we talk about REST web services we just assume HTTP. HTTP defines interface with it's methods(GET, POST, PUT, DELETE, PATCH etc) and various headers which can be used uniformly for interacting with resources. This uniformity can be achieved with other protocols as well.

P.S. Very simple, yet very interesting explanation of REST: http://www.looah.com/source/view/2284

How to hide action bar before activity is created, and then show it again?

you can use this :

getSupportActionBar().hide(); if it doesn't work try this one :

getActionBar().hide();

if above doesn't work try like this :

in your directory = res/values/style.xml , open style.xml -> there is attribute parent change to parent="Theme.AppCompat.Light.DarkActionBar"

if all of it doesn't work too. i don't know anymore. but for me it works.

problem with <select> and :after with CSS in WebKit

<div class="select">
<select name="you_are" id="dropdown" class="selection">
<option value="0" disabled selected>Select</option>
<option value="1">Student</option>
<option value="2">Full-time Job</option>
<option value="2">Part-time Job</option>
<option value="3">Job-Seeker</option>
<option value="4">Nothing Yet</option>
</select>
</div>

Insted of styling the select why dont you add a div out-side the select.

and style then in CSS

.select{
    width: 100%;
    height: 45px;
    position: relative;
}
.select::after{
    content: '\f0d7';
    position: absolute;
    top: 0px;
    right: 10px;
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    color: #0b660b;
    font-size: 45px;
    z-index: 2;

}
#dropdown{
    -webkit-appearance: button;
       -moz-appearance: button;
            appearance: button;
            height: 45px;
            width: 100%;
        outline: none;
        border: none;
        border-bottom: 2px solid #0b660b;
        font-size: 20px;
        background-color: #0b660b23;
        box-sizing: border-box;
        padding-left: 10px;
        padding-right: 10px;
}

Angular 2 declaring an array of objects

type NumberArray = Array<{id: number, text: string}>;

const arr: NumberArray = [
    {id: 0, text: 'Number 0'},
    {id: 1, text: 'Number 1'},
    {id: 2, text: 'Number 2'},
    {id: 3, text: 'Number 3 '},
    {id: 4, text: 'Number 4 '},
    {id: 5, text: 'Number 5 '},
];

Is it possible to select the last n items with nth-child?

:nth-last-child(-n+2) should do the trick

Html table with button on each row

Pretty sure this solves what you're looking for:

HTML:

<table>
    <tr><td><button class="editbtn">edit</button></td></tr>
    <tr><td><button class="editbtn">edit</button></td></tr>
    <tr><td><button class="editbtn">edit</button></td></tr>
    <tr><td><button class="editbtn">edit</button></td></tr>
</table>

Javascript (using jQuery):

$(document).ready(function(){
    $('.editbtn').click(function(){
        $(this).html($(this).html() == 'edit' ? 'modify' : 'edit');
    });
});

Edit:

Apparently I should have looked at your sample code first ;)

You need to change (at least) the ID attribute of each element. The ID is the unique identifier for each element on the page, meaning that if you have multiple items with the same ID, you'll get conflicts.

By using classes, you can apply the same logic to multiple elements without any conflicts.

JSFiddle sample

How do you stash an untracked file?

let's suppose the new and untracked file is called: "views.json". if you want to change branch by stashing the state of your app, I generally type:

git add views.json

Then:

git stash

And it would be stashed. Then I can just change branch with

git checkout other-nice-branch

scp files from local to remote machine error: no such file or directory

In my case I had to specify the Port Number using

scp -P 2222 username@hostip:/directory/ /localdirectory/

jQuery "on create" event for dynamically-created elements

As mentioned in several other answers, mutation events have been deprecated, so you should use MutationObserver instead. Since nobody has given any details on that yet, here it goes...

Basic JavaScript API

The API for MutationObserver is fairly simple. It's not quite as simple as the mutation events, but it's still okay.

_x000D_

function callback(records) {_x000D_
  records.forEach(function (record) {_x000D_
    var list = record.addedNodes;_x000D_
    var i = list.length - 1;_x000D_
    _x000D_
 for ( ; i > -1; i-- ) {_x000D_
   if (list[i].nodeName === 'SELECT') {_x000D_
     // Insert code here..._x000D_
     console.log(list[i]);_x000D_
   }_x000D_
 }_x000D_
  });_x000D_
}_x000D_
_x000D_
var observer = new MutationObserver(callback);_x000D_
_x000D_
var targetNode = document.body;_x000D_
_x000D_
observer.observe(targetNode, { childList: true, subtree: true });

_x000D_

<script>_x000D_
  // For testing_x000D_
  setTimeout(function() {_x000D_
    var $el = document.createElement('select');_x000D_
    document.body.appendChild($el);_x000D_
  }, 500);_x000D_
</script>

_x000D_

Let's break that down.

var observer = new MutationObserver(callback);

This creates the observer. The observer isn't watching anything yet; this is just where the event listener gets attached.

observer.observe(targetNode, { childList: true, subtree: true });

This makes the observer start up. The first argument is the node that the observer will watch for changes on. The second argument is the options for what to watch for.

childList means I want to watch for child elements being added or removed.
subtree is a modifier that extends childList to watch for changes anywhere in this element's subtree (otherwise, it would just look at changes directly within targetNode).

The other two main options besides childList are attributes and characterData, which mean about what they sound like. You must use one of those three.

function callback(records) {
  records.forEach(function (record) {

Things get a little tricky inside the callback. The callback receives an array of MutationRecords. Each MutationRecord can describe several changes of one type (childList, attributes, or characterData). Since I only told the observer to watch for childList, I won't bother checking the type.

var list = record.addedNodes;

Right here I grab a NodeList of all the child nodes that were added. This will be empty for all the records where nodes aren't added (and there may be many such records).

From there on, I loop through the added nodes and find any that are <select> elements.

Nothing really complex here.

jQuery

...but you asked for jQuery. Fine.

(function($) {

  var observers = [];

  $.event.special.domNodeInserted = {

    setup: function setup(data, namespaces) {
      var observer = new MutationObserver(checkObservers);

      observers.push([this, observer, []]);
    },

    teardown: function teardown(namespaces) {
      var obs = getObserverData(this);

      obs[1].disconnect();

      observers = $.grep(observers, function(item) {
        return item !== obs;
      });
    },

    remove: function remove(handleObj) {
      var obs = getObserverData(this);

      obs[2] = obs[2].filter(function(event) {
        return event[0] !== handleObj.selector && event[1] !== handleObj.handler;
      });
    },

    add: function add(handleObj) {
      var obs = getObserverData(this);

      var opts = $.extend({}, {
        childList: true,
        subtree: true
      }, handleObj.data);

      obs[1].observe(this, opts);

      obs[2].push([handleObj.selector, handleObj.handler]);
    }
  };

  function getObserverData(element) {
    var $el = $(element);

    return $.grep(observers, function(item) {
      return $el.is(item[0]);
    })[0];
  }

  function checkObservers(records, observer) {
    var obs = $.grep(observers, function(item) {
      return item[1] === observer;
    })[0];

    var triggers = obs[2];

    var changes = [];

    records.forEach(function(record) {
      if (record.type === 'attributes') {
        if (changes.indexOf(record.target) === -1) {
          changes.push(record.target);
        }

        return;
      }

      $(record.addedNodes).toArray().forEach(function(el) {
        if (changes.indexOf(el) === -1) {
          changes.push(el);
        }
      })
    });

    triggers.forEach(function checkTrigger(item) {
      changes.forEach(function(el) {
        var $el = $(el);

        if ($el.is(item[0])) {
          $el.trigger('domNodeInserted');
        }
      });
    });
  }

})(jQuery);

This creates a new event called domNodeInserted, using the jQuery special events API. You can use it like so:

$(document).on("domNodeInserted", "select", function () {
  $(this).combobox();
});

I would personally suggest looking for a class because some libraries will create select elements for testing purposes.

Naturally, you can also use .off("domNodeInserted", ...) or fine-tune the watching by passing in data like this:

$(document.body).on("domNodeInserted", "select.test", {
  attributes: true,
  subtree: false
}, function () {
  $(this).combobox();
});

This would trigger checking for the appearance of a select.test element whenever attributes changed for elements directly inside the body.

You can see it live below or on jsFiddle.

_x000D_

(function($) {_x000D_
  $(document).on("domNodeInserted", "select", function() {_x000D_
    console.log(this);_x000D_
    //$(this).combobox();_x000D_
  });_x000D_
})(jQuery);

_x000D_

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
_x000D_
<script>_x000D_
  // For testing_x000D_
  setTimeout(function() {_x000D_
    var $el = document.createElement('select');_x000D_
    document.body.appendChild($el);_x000D_
  }, 500);_x000D_
</script>_x000D_
_x000D_
<script>_x000D_
  (function($) {_x000D_
_x000D_
    var observers = [];_x000D_
_x000D_
    $.event.special.domNodeInserted = {_x000D_
_x000D_
      setup: function setup(data, namespaces) {_x000D_
        var observer = new MutationObserver(checkObservers);_x000D_
_x000D_
        observers.push([this, observer, []]);_x000D_
      },_x000D_
_x000D_
      teardown: function teardown(namespaces) {_x000D_
        var obs = getObserverData(this);_x000D_
_x000D_
        obs[1].disconnect();_x000D_
_x000D_
        observers = $.grep(observers, function(item) {_x000D_
          return item !== obs;_x000D_
        });_x000D_
      },_x000D_
_x000D_
      remove: function remove(handleObj) {_x000D_
        var obs = getObserverData(this);_x000D_
_x000D_
        obs[2] = obs[2].filter(function(event) {_x000D_
          return event[0] !== handleObj.selector && event[1] !== handleObj.handler;_x000D_
        });_x000D_
      },_x000D_
_x000D_
      add: function add(handleObj) {_x000D_
        var obs = getObserverData(this);_x000D_
_x000D_
        var opts = $.extend({}, {_x000D_
          childList: true,_x000D_
          subtree: true_x000D_
        }, handleObj.data);_x000D_
_x000D_
        obs[1].observe(this, opts);_x000D_
_x000D_
        obs[2].push([handleObj.selector, handleObj.handler]);_x000D_
      }_x000D_
    };_x000D_
_x000D_
    function getObserverData(element) {_x000D_
      var $el = $(element);_x000D_
_x000D_
      return $.grep(observers, function(item) {_x000D_
        return $el.is(item[0]);_x000D_
      })[0];_x000D_
    }_x000D_
_x000D_
    function checkObservers(records, observer) {_x000D_
      var obs = $.grep(observers, function(item) {_x000D_
        return item[1] === observer;_x000D_
      })[0];_x000D_
_x000D_
      var triggers = obs[2];_x000D_
_x000D_
      var changes = [];_x000D_
_x000D_
      records.forEach(function(record) {_x000D_
        if (record.type === 'attributes') {_x000D_
          if (changes.indexOf(record.target) === -1) {_x000D_
            changes.push(record.target);_x000D_
          }_x000D_
_x000D_
          return;_x000D_
        }_x000D_
_x000D_
        $(record.addedNodes).toArray().forEach(function(el) {_x000D_
          if (changes.indexOf(el) === -1) {_x000D_
            changes.push(el);_x000D_
          }_x000D_
        })_x000D_
      });_x000D_
_x000D_
      triggers.forEach(function checkTrigger(item) {_x000D_
        changes.forEach(function(el) {_x000D_
          var $el = $(el);_x000D_
_x000D_
          if ($el.is(item[0])) {_x000D_
            $el.trigger('domNodeInserted');_x000D_
          }_x000D_
        });_x000D_
      });_x000D_
    }_x000D_
_x000D_
  })(jQuery);_x000D_
</script>

_x000D_

Note

This jQuery code is a fairly basic implementation. It does not trigger in cases where modifications elsewhere make your selector valid.

For example, suppose your selector is .test select and the document already has a <select>. Adding the class test to <body> will make the selector valid, but because I only check record.target and record.addedNodes, the event would not fire. The change has to happen to the element you wish to select itself.

This could be avoided by querying for the selector whenever mutations happen. I chose not to do that to avoid causing duplicate events for elements that had already been handled. Properly dealing with adjacent or general sibling combinators would make things even trickier.

For a more comprehensive solution, see https://github.com/pie6k/jquery.initialize, as mentioned in Damien Ó Ceallaigh's answer. However, the author of that library has announced that the library is old and suggests that you shouldn't use jQuery for this.

string.split - by multiple character delimiter

More fast way using directly a no-string array but a string:

string[] StringSplit(string StringToSplit, string Delimitator)
{
    return StringToSplit.Split(new[] { Delimitator }, StringSplitOptions.None);
}

StringSplit("E' una bella giornata oggi", "giornata");
/* Output
[0] "E' una bella giornata"
[1] " oggi"
*/

Length of string in bash

Using your example provided

#KISS (Keep it simple stupid)
size=${#myvar}
echo $size

Example of AES using Crypto++

Official document of Crypto++ AES is a good start. And from my archive, a basic implementation of AES is as follows:

Please refer here with more explanation, I recommend you first understand the algorithm and then try to understand each line step by step.

#include <iostream>
#include <iomanip>

#include "modes.h"
#include "aes.h"
#include "filters.h"

int main(int argc, char* argv[]) {

    //Key and IV setup
    //AES encryption uses a secret key of a variable length (128-bit, 196-bit or 256-   
    //bit). This key is secretly exchanged between two parties before communication   
    //begins. DEFAULT_KEYLENGTH= 16 bytes
    CryptoPP::byte key[ CryptoPP::AES::DEFAULT_KEYLENGTH ], iv[ CryptoPP::AES::BLOCKSIZE ];
    memset( key, 0x00, CryptoPP::AES::DEFAULT_KEYLENGTH );
    memset( iv, 0x00, CryptoPP::AES::BLOCKSIZE );

    //
    // String and Sink setup
    //
    std::string plaintext = "Now is the time for all good men to come to the aide...";
    std::string ciphertext;
    std::string decryptedtext;

    //
    // Dump Plain Text
    //
    std::cout << "Plain Text (" << plaintext.size() << " bytes)" << std::endl;
    std::cout << plaintext;
    std::cout << std::endl << std::endl;

    //
    // Create Cipher Text
    //
    CryptoPP::AES::Encryption aesEncryption(key, CryptoPP::AES::DEFAULT_KEYLENGTH);
    CryptoPP::CBC_Mode_ExternalCipher::Encryption cbcEncryption( aesEncryption, iv );

    CryptoPP::StreamTransformationFilter stfEncryptor(cbcEncryption, new CryptoPP::StringSink( ciphertext ) );
    stfEncryptor.Put( reinterpret_cast<const unsigned char*>( plaintext.c_str() ), plaintext.length() );
    stfEncryptor.MessageEnd();

    //
    // Dump Cipher Text
    //
    std::cout << "Cipher Text (" << ciphertext.size() << " bytes)" << std::endl;

    for( int i = 0; i < ciphertext.size(); i++ ) {

        std::cout << "0x" << std::hex << (0xFF & static_cast<CryptoPP::byte>(ciphertext[i])) << " ";
    }

    std::cout << std::endl << std::endl;

    //
    // Decrypt
    //
    CryptoPP::AES::Decryption aesDecryption(key, CryptoPP::AES::DEFAULT_KEYLENGTH);
    CryptoPP::CBC_Mode_ExternalCipher::Decryption cbcDecryption( aesDecryption, iv );

    CryptoPP::StreamTransformationFilter stfDecryptor(cbcDecryption, new CryptoPP::StringSink( decryptedtext ) );
    stfDecryptor.Put( reinterpret_cast<const unsigned char*>( ciphertext.c_str() ), ciphertext.size() );
    stfDecryptor.MessageEnd();

    //
    // Dump Decrypted Text
    //
    std::cout << "Decrypted Text: " << std::endl;
    std::cout << decryptedtext;
    std::cout << std::endl << std::endl;

    return 0;
}

For installation details :

How do I install Crypto++ in Visual Studio 2010 Windows 7?
*nix environment
For Ubuntu I did:

sudo apt-get install libcrypto++-dev libcrypto++-doc libcrypto++-utils

installing vmware tools: location of GCC binary?

to avoid the problem with CDROM: sudo nano /etc/apt/sources.list

find your cdrom and comment it with #

save the changes: "cntrl + o", than exit the file: "cntrl + x"

and try to install again

Is it possible to create a remote repo on GitHub from the CLI without opening browser?

This can be done with three commands:

curl -u 'nyeates' https://api.github.com/user/repos -d '{"name":"projectname","description":"This project is a test"}'
git remote add origin [email protected]:nyeates/projectname.git
git push origin master

(updated for v3 Github API)

Explanation of these commands...

Create github repo

    curl -u 'nyeates' https://api.github.com/user/repos -d '{"name":"projectname","description":"This project is a test"}'

curl is a unix command (above works on mac too) that retrieves and interacts with URLs. It is commonly already installed.
"-u" is a curl parameter that specifies the user name and password to use for server authentication.
- If you just give the user name (as shown in example above) curl will prompt for a password.
- If you do not want to have to type in the password, see githubs api documentation on Authentication
"-d" is a curl parameter that allows you to send POST data with the request
- You are sending POST data in githubs defined API format
"name" is the only POST data required; I like to also include "description"
I found that it was good to quote all POST data with single quotes ' '

Define where to push to

git remote add origin [email protected]:nyeates/projectname.git

add definition for location and existance of connected (remote) repo on github
"origin" is a default name used by git for where the source came from
- technically didnt come from github, but now the github repo will be the source of record
"[email protected]:nyeates" is a ssh connection that assumes you have already setup a trusted ssh keypair with github.

Push local repo to github

git push origin master

push to the origin remote (github) from the master local branch

Map with Key as String and Value as List in Groovy

you don't need to declare Map groovy internally recognizes it

def personDetails = [firstName:'John', lastName:'Doe', fullName:'John Doe']

// print the values..
    println "First Name: ${personDetails.firstName}"
    println "Last Name: ${personDetails.lastName}"

http://grails.asia/groovy-map-tutorial

How can I take an UIImage and give it a black border?

With OS > 3.0 you can do this:

//you need this import
#import <QuartzCore/QuartzCore.h>

[imageView.layer setBorderColor: [[UIColor blackColor] CGColor]];
[imageView.layer setBorderWidth: 2.0];

JUnit test for System.out.println()

using ByteArrayOutputStream and System.setXXX is simple:

private final ByteArrayOutputStream outContent = new ByteArrayOutputStream();
private final ByteArrayOutputStream errContent = new ByteArrayOutputStream();
private final PrintStream originalOut = System.out;
private final PrintStream originalErr = System.err;

@Before
public void setUpStreams() {
    System.setOut(new PrintStream(outContent));
    System.setErr(new PrintStream(errContent));
}

@After
public void restoreStreams() {
    System.setOut(originalOut);
    System.setErr(originalErr);
}

sample test cases:

@Test
public void out() {
    System.out.print("hello");
    assertEquals("hello", outContent.toString());
}

@Test
public void err() {
    System.err.print("hello again");
    assertEquals("hello again", errContent.toString());
}

I used this code to test the command line option (asserting that -version outputs the version string, etc etc)

Edit: Prior versions of this answer called System.setOut(null) after the tests; This is the cause of NullPointerExceptions commenters refer to.

Query to check index on a table

Simply you can find index name and column names of a particular table using below command

SP_HELPINDEX 'tablename'

It work's for me

What are the options for (keyup) in Angular2?

These are the options currently documented in the tests: ctrl, shift, enter and escape. These are some valid examples of key bindings:

keydown.control.shift.enter
keydown.control.esc

You can track this here while no official docs exist, but they should be out soon.

Change the color of a bullet in a html list?

I managed this without adding markup, but instead using li:before. This obviously has all the limitations of :before (no old IE support), but it seems to work with IE8, Firefox and Chrome after some very limited testing. It's working in our controller environment, wondering if anyone could check this. The bullet style is also limited by what's in unicode.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
  <style type="text/css">
    li {
      list-style: none;
    }

    li:before {
      /* For a round bullet */
      content:'\2022';
      /* For a square bullet */
      /*content:'\25A0';*/
      display: block;
      position: relative;
      max-width: 0px;
      max-height: 0px;
      left: -10px;
      top: -0px;
      color: green;
      font-size: 20px;
    }
  </style>
</head>

<body>
  <ul>
    <li>foo</li>
    <li>bar</li>
  </ul>
</body>
</html>

What causes an HTTP 405 "invalid method (HTTP verb)" error when POSTing a form to PHP on IIS?

I had this issue with a facebook application that I was developing for a fan page tab. If anyone faces this issue with a facebook application then

1-goto https://developers.facebook.com

2-select the application that you are developing

3-make sure that all the link to your application has tailing slash /

my issue was in the https://developers.facebook.com->Apps->MYAPPNAME->settings->Page Tab->Secure Page Tab URL, Page Tab Edit URL, Page Tab URL hope this will help

C++ string to double conversion

The C++ way of solving conversions (not the classical C) is illustrated with the program below. Note that the intent is to be able to use the same formatting facilities offered by iostream like precision, fill character, padding, hex, and the manipulators, etcetera.

Compile and run this program, then study it. It is simple

#include "iostream"
#include "iomanip"
#include "sstream"
using namespace std;

int main()
{
    // Converting the content of a char array or a string to a double variable
    double d;
    string S;
    S = "4.5";
    istringstream(S) >> d;    
    cout << "\nThe value of the double variable d is " << d << endl;
    istringstream("9.87654") >> d;  
    cout << "\nNow the value of the double variable d is " << d << endl;



    // Converting a double to string with formatting restrictions
    double D=3.771234567;

    ostringstream Q;
    Q.fill('#');
    Q << "<<<" << setprecision(6) << setw(20) << D << ">>>";
    S = Q.str(); // formatted converted double is now in string 

    cout << "\nThe value of the string variable S is " << S << endl;
    return 0;
}

Prof. Martinez

"CAUTION: provisional headers are shown" in Chrome debugger

This issue occurred to me when I was sending an invalid HTTP Authorization header. I forgot to base64 encode it.

JQuery DatePicker ReadOnly

You can set the range allowed to some invalid range so the user can't select any date:

$("#datepicker").datepicker({minDate:-1,maxDate:-2}).attr('readonly','readonly');

CSS/HTML: What is the correct way to make text italic?

OK, the first thing to note is that ~~<i> has been deprecated, and shouldn't be used~~ <i> has not been deprecated, but I still do not recommend using it—see the comments for details. This is because it goes entirely against keeping presentation in the presentation layer, which you've pointed out. Similarly, <span class="italic"> seems to break the mold too.

So now we have two real ways of doing things: <em> and <span class="footnote">. Remember that em stands for emphasis. When you wish to apply emphasis to a word, phrase or sentence, stick it in <em> tags regardless of whether you want italics or not. If you want to change the styling in some other way, use CSS: em { font-weight: bold; font-style: normal; }. Of course, you can also apply a class to the <em> tag: if you decide you want certain emphasised phrases to show up in red, give them a class and add it to the CSS:

Fancy some <em class="special">shiny</em> text?

em { font-weight: bold; font-style: normal; }
em.special { color: red; }

If you're applying italics for some other reason, go with the other method and give the section a class. That way, you can change its styling whenever you want without adjusting the HTML. In your example, footnotes should not be emphasised—in fact, they should be de-emphasised, as the point of a footnote is to show unimportant but interesting or useful information. In this case, you're much better off applying a class to the footnote and making it look like one in the presentation layer—the CSS.

How could I use requests in asyncio?

To use requests (or any other blocking libraries) with asyncio, you can use BaseEventLoop.run_in_executor to run a function in another thread and yield from it to get the result. For example:

import asyncio
import requests

@asyncio.coroutine
def main():
    loop = asyncio.get_event_loop()
    future1 = loop.run_in_executor(None, requests.get, 'http://www.google.com')
    future2 = loop.run_in_executor(None, requests.get, 'http://www.google.co.uk')
    response1 = yield from future1
    response2 = yield from future2
    print(response1.text)
    print(response2.text)

loop = asyncio.get_event_loop()
loop.run_until_complete(main())

This will get both responses in parallel.

With python 3.5 you can use the new await/async syntax:

import asyncio
import requests

async def main():
    loop = asyncio.get_event_loop()
    future1 = loop.run_in_executor(None, requests.get, 'http://www.google.com')
    future2 = loop.run_in_executor(None, requests.get, 'http://www.google.co.uk')
    response1 = await future1
    response2 = await future2
    print(response1.text)
    print(response2.text)

loop = asyncio.get_event_loop()
loop.run_until_complete(main())

See PEP0492 for more.

Disable sorting for a particular column in jQuery DataTables

Using class:

<table  class="table table-datatable table-bordered" id="tableID">
    <thead>
        <tr>
            <th class="nosort"><input type="checkbox" id="checkAllreInvitation" /></th>
            <th class="sort-alpha">Employee name</th>
            <th class="sort-alpha">Send Date</th>
            <th class="sort-alpha">Sender</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td><input type="checkbox" name="userUid[]" value="{user.uid}" id="checkAllreInvitation" class="checkItemre validate[required]" /></td>
            <td>Alexander Schwartz</td>
            <td>27.12.2015</td>
            <td>[email protected]</td>
        </tr>
    </tbody>
</table>
<script type="text/javascript">
    $(document).ready(function() {
        $('#tableID').DataTable({
            'iDisplayLength':100,
            "aaSorting": [[ 0, "asc" ]],
            'aoColumnDefs': [{
                'bSortable': false,
                'aTargets': ['nosort']
            }]
        });
    });
</script>

Now you can give "nosort" class to <TH>

How to implement the Java comparable interface?

While you are in it, I suggest to remember some key facts about compareTo() methods

CompareTo must be in consistent with equals method e.g. if two objects are equal via equals() , there compareTo() must return zero otherwise if those objects are stored in SortedSet or SortedMap they will not behave properly.
CompareTo() must throw NullPointerException if current object get compared to null object as opposed to equals() which return false on such scenario.

Where can I get Google developer key

API Key is your developer key. Hit https://www.googleapis.com/webfonts/v1/webfonts?key= in your browser by enabling web fonts api and you will see result.

Refer this blog http://code.garyjones.co.uk/google-developer-api-key/ for more information

Render a string in HTML and preserve spaces and linebreaks

You would want to replace all spaces with   (non-breaking space) and all new lines \n with <br> (line break in html). This should achieve the result you're looking for.

body = body.replace(' ', '&nbsp;').replace('\n', '<br>');

Something of that nature.

Convert AM/PM time to 24 hours format?

using System;

class Solution
{
    static string timeConversion(string s)
    {
        return DateTime.Parse(s).ToString("HH:mm");
    }

    static void Main(string[] args)
    {
        Console.WriteLine(timeConversion("01:00 PM"));
        Console.Read();
    }
}

How to find all duplicate from a List<string>?

In .NET framework 3.5 and above you can use Enumerable.GroupBy which returns an enumerable of enumerables of duplicate keys, and then filter out any of the enumerables that have a Count of <=1, then select their keys to get back down to a single enumerable:

var duplicateKeys = list.GroupBy(x => x)
                        .Where(group => group.Count() > 1)
                        .Select(group => group.Key);

How can we stop a running java process through Windows cmd?

Normally I don't have that many Java processes open so

taskkill /im javaw.exe

taskkill /im java.exe

should suffice. This will kill all instances of Java, though.

How can I insert multiple rows into oracle with a sequence value?

insert into TABLE_NAME
(COL1,COL2)
WITH
data AS
(
    select 'some value'    x from dual
    union all
    select 'another value' x from dual
)
SELECT my_seq.NEXTVAL, x 
FROM data
;

I think that is what you want, but i don't have access to oracle to test it right now.

difference between width auto and width 100 percent

Width auto

The initial width of a block level element like div or p is auto. This makes it expand to occupy all available horizontal space within its containing block. If it has any horizontal padding or border, the widths of those do not add to the total width of the element.

Width 100%

On the other hand, if you specify width:100%, the element’s total width will be 100% of its containing block plus any horizontal margin, padding and border (unless you’ve used box-sizing:border-box, in which case only margins are added to the 100% to change how its total width is calculated). This may be what you want, but most likely it isn’t.

To visualise the difference see this picture:

enter image description here

Source

How to Inspect Element using Safari Browser

in menu bar click on Edit->preference->advance at bottom click the check box true that is for Show develop menu in menu bar now a develop menu is display at menu bar where you can see all develop option and inspect.

Convert Text to Date?

Solved the issue for me :

    Range(Cells(1, 1), Cells(100, 1)).Select

    For Each xCell In Selection

    xCell.Value = CDate(xCell.Value)

    Next xCell

C# : Out of Memory exception

.Net4.5 does not have a 2GB limitation for objects any more. Add this lines to App.config

<runtime>
    <gcAllowVeryLargeObjects enabled="true" />    
</runtime>

and it will be possible to create very large objects without getting OutOfMemoryException

Please note it will work only on x64 OS's!

In a URL, should spaces be encoded using %20 or +?

According to the W3C (and they are the official source on these things), a space character in the query string (and in the query string only) may be encoded as either "%20" or "+". From the section "Query strings" under "Recommendations":

Within the query string, the plus sign is reserved as shorthand notation for a space. Therefore, real plus signs must be encoded. This method was used to make query URIs easier to pass in systems which did not allow spaces.

According to section 3.4 of RFC2396 which is the official specification on URIs in general, the "query" component is URL-dependent:

3.4. Query Component The query component is a string of information to be interpreted by the resource.
   query         = *uric
Within a query component, the characters ";", "/", "?", ":", "@", "&", "=", "+", ",", and "$" are reserved.

It is therefore a bug in the other software if it does not accept URLs with spaces in the query string encoded as "+" characters.

As for the third part of your question, one way (though slightly ugly) to fix the output from URLEncoder.encode() is to then call replaceAll("\\+","%20") on the return value.

Python convert tuple to string

Use str.join:

>>> tup = ('a', 'b', 'c', 'd', 'g', 'x', 'r', 'e')
>>> ''.join(tup)
'abcdgxre'
>>>
>>> help(str.join)
Help on method_descriptor:

join(...)
    S.join(iterable) -> str

    Return a string which is the concatenation of the strings in the
    iterable.  The separator between elements is S.

>>>

Break statement in javascript array map method

That's not possible using the built-in Array.prototype.map. However, you could use a simple for-loop instead, if you do not intend to map any values:

var hasValueLessThanTen = false;
for (var i = 0; i < myArray.length; i++) {
  if (myArray[i] < 10) {
    hasValueLessThanTen = true;
    break;
  }
}

Or, as suggested by @RobW, use Array.prototype.some to test if there exists at least one element that is less than 10. It will stop looping when some element that matches your function is found:

var hasValueLessThanTen = myArray.some(function (val) { 
  return val < 10;
});

Python and pip, list all versions of a package that's available?

You can try to install package version that does to exist. Then pip will list available versions

pip install hell==99999
ERROR: Could not find a version that satisfies the requirement hell==99999
(from versions: 0.1.0, 0.2.0, 0.2.1, 0.2.2, 0.2.3, 0.2.4, 0.3.0,
0.3.1, 0.3.2, 0.3.3, 0.3.4, 0.4.0, 0.4.1)
ERROR: No matching distribution found for hell==99999

Will iOS launch my app into the background if it was force-quit by the user?

For iOS13

For background pushes in iOS13, you must set below parameters:

apns-priority = 5
apns-push-type = background
//Required for WatchOS
//Highly recommended for Other platforms

The video link: https://developer.apple.com/videos/play/wwdc2019/707/

Intellij idea cannot resolve anything in maven

I had empty settings.xml file in Users/.../.m2/settings.xml. When i added

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
                      https://maven.apache.org/xsd/settings-1.0.0.xsd">

</settings>

all dependicies were loaded

Redraw datatables after using ajax to refresh the table content?

For users of modern DataTables (1.10 and above), all the answers and examples on this page are for the old api, not the new. I had a very hard time finding a newer example but finally did find this DT forum post (TL;DR for most folks) which led me to this concise example.

The example code worked for me after I finally noticed the $() selector syntax immediately surrounding the html string. You have to add a node not a string.

That example really is worth looking at but, in the spirit of SO, if you just want to see a snippet of code that works:

var table = $('#example').DataTable();
  table.rows.add( $(
          '<tr>'+
          '  <td>Tiger Nixon</td>'+
          '  <td>System Architect</td>'+
          '  <td>Edinburgh</td>'+
          '  <td>61</td>'+
          '  <td>2011/04/25</td>'+
          '  <td>$3,120</td>'+
          '</tr>'
  ) ).draw();

The careful reader might note that, since we are adding only one row of data, that table.row.add(...) should work as well and did for me.

getResourceAsStream returns null

Don't know if of help, but in my case I had my resource in the /src/ folder and was getting this error. I then moved the picture to the bin folder and it fixed the issue.

Convert base class to derived class

No, there is no built in conversion for this. You'll need to create a constructor, like you mentioned, or some other conversion method.

Also, since BaseClass is not a DerivedClass, myDerivedObject will be null, andd the last line above will throw a null ref exception.

How to add double quotes to a string that is inside a variable?

Use either

&dquo;
<div>&dquo;"+ title +@"&dquo;</div>

or escape the double quote:

\"
<div>\""+ title +@"\"</div>

Adding a legend to PyPlot in Matplotlib in the simplest manner possible

Add labels to each argument in your plot call corresponding to the series it is graphing, i.e. label = "series 1"

Then simply add Pyplot.legend() to the bottom of your script and the legend will display these labels.

Callback after all asynchronous forEach callbacks are completed

Array.forEach does not provide this nicety (oh if it would) but there are several ways to accomplish what you want:

Using a simple counter

function callback () { console.log('all done'); }

var itemsProcessed = 0;

[1, 2, 3].forEach((item, index, array) => {
  asyncFunction(item, () => {
    itemsProcessed++;
    if(itemsProcessed === array.length) {
      callback();
    }
  });
});

(thanks to @vanuan and others) This approach guarantees that all items are processed before invoking the "done" callback. You need to use a counter that gets updated in the callback. Depending on the value of the index parameter does not provide the same guarantee, because the order of return of the asynchronous operations is not guaranteed.

Using ES6 Promises

(a promise library can be used for older browsers):

Process all requests guaranteeing synchronous execution (e.g. 1 then 2 then 3)

function asyncFunction (item, cb) {
  setTimeout(() => {
    console.log('done with', item);
    cb();
  }, 100);
}

let requests = [1, 2, 3].reduce((promiseChain, item) => {
    return promiseChain.then(() => new Promise((resolve) => {
      asyncFunction(item, resolve);
    }));
}, Promise.resolve());

requests.then(() => console.log('done'))

Process all async requests without "synchronous" execution (2 may finish faster than 1)

let requests = [1,2,3].map((item) => {
    return new Promise((resolve) => {
      asyncFunction(item, resolve);
    });
})

Promise.all(requests).then(() => console.log('done'));

Using an async library

There are other asynchronous libraries, async being the most popular, that provide mechanisms to express what you want.

Edit

The body of the question has been edited to remove the previously synchronous example code, so i've updated my answer to clarify. The original example used synchronous like code to model asynchronous behaviour, so the following applied:

array.forEach is synchronous and so is res.write, so you can simply put your callback after your call to foreach:

  posts.foreach(function(v, i) {
    res.write(v + ". index " + i);
  });

  res.end();

PKIX path building failed: unable to find valid certification path to requested target

Here is the solution that I used for installing a site's public cert into the systems keystore for use.

Download the certificate with the following command:

unix, linux, mac

openssl s_client -connect [host]:[port|443] < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > [host].crt

windows

openssl s_client -connect [host]:[port|443] < NUL | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > [host].crt

That will create a crt that can be used to import into a keystore.

Install the new certificate with the command:

keytool -import -alias "[host]" -keystore [path to keystore] -file [host].crt

This will allow you to import the new cert from the site that is causing the exception.

LEFT INNER JOIN vs. LEFT OUTER JOIN - Why does the OUTER take longer?

The fact that the same number of rows is returned is an after fact, the query optimizer cannot know in advance that every row in Accepts has a matching row in Marker, can it?

If you join two tables A and B, say A has 1 million rows and B has 1 row. If you say A LEFT INNER JOIN B it means only rows that match both A and B can result, so the query plan is free to scan B first, then use an index to do a range scan in A, and perhaps return 10 rows. But if you say A LEFT OUTER JOIN B then at least all rows in A have to be returned, so the plan must scan everything in A no matter what it finds in B. By using an OUTER join you are eliminating one possible optimization.

If you do know that every row in Accepts will have a match in Marker, then why not declare a foreign key to enforce this? The optimizer will see the constraint, and if is trusted, will take it into account in the plan.

Determine if two rectangles overlap each other?

Don't think of coordinates as indicating where pixels are. Think of them as being between the pixels. That way, the area of a 2x2 rectangle should be 4, not 9.

bool bOverlap = !((A.Left >= B.Right || B.Left >= A.Right)
               && (A.Bottom >= B.Top || B.Bottom >= A.Top));

Getting Access Denied when calling the PutObject operation with bucket-level permission

Error : An error occurred (AccessDenied) when calling the PutObject operation: Access Denied

I solved the issue by passing Extra Args parameter as PutObjectAcl is disabled by company policy.

s3_client.upload_file('./local_file.csv', 'bucket-name', 'path', ExtraArgs={'ServerSideEncryption': 'AES256'})

Is there a simple way to delete a list element by value?

this is my answer, just use while and for

def remove_all(data, value):
    i = j = 0
    while j < len(data):
        if data[j] == value:
            j += 1
            continue
        data[i] = data[j]
        i += 1
        j += 1
    for x in range(j - i):
        data.pop()

What is 'Currying'?

Currying is one of the higher-order functions of Java Script.

Currying is a function of many arguments which is rewritten such that it takes the first argument and return a function which in turns uses the remaining arguments and returns the value.

Confused?

Let see an example,

function add(a,b)
    {
        return a+b;
    }
add(5,6);

This is similar to the following currying function,

function add(a)
    {
        return function(b){
            return a+b;
        }
    }
var curryAdd = add(5);
curryAdd(6);

So what does this code means?

Now read the definition again,

Currying is a function of many arguments which is rewritten such that it takes first argument and return a function which in turns uses the remaining arguments and returns the value.

Still, Confused? Let me explain in deep!

When you call this function,

var curryAdd = add(5);

It will return you a function like this,

curryAdd=function(y){return 5+y;}

So, this is called higher-order functions. Meaning, Invoking one function in turns returns another function is an exact definition for higher-order function. This is the greatest advantage for the legend, Java Script. So come back to the currying,

This line will pass the second argument to the curryAdd function.

curryAdd(6);

which in turns results,

curryAdd=function(6){return 5+6;}
// Which results in 11

Hope you understand the usage of currying here. So, Coming to the advantages,

Why Currying?

It makes use of code reusability. Less code, Less Error. You may ask how it is less code?

I can prove it with ECMA script 6 new feature arrow functions.

Yes! ECMA 6, provide us with the wonderful feature called arrow functions,

function add(a)
    {
        return function(b){
            return a+b;
        }
    }

With the help of the arrow function, we can write the above function as follows,

x=>y=>x+y

Cool right?

So, Less Code and Fewer bugs!!

With the help of these higher-order function one can easily develop a bug-free code.

I challenge you!

Hope, you understood what is currying. Please feel free to comment over here if you need any clarifications.

Thanks, Have a nice day!

How do I prevent CSS inheritance?

There is a property called all in the CSS3 inheritance module. It works like this:

#sidebar ul li {
  all: initial;
}

As of 2016-12, all browsers but IE/Edge and Opera Mini support this property.

How to create jar file with package structure?

You need to start creating the JAR at the root of the files.

So, for instance:

jar cvf program.jar -C path/to/classes .

That assumes that path/to/classes contains the com directory.

FYI, these days it is relatively uncommon for most people to use the jar command directly, as they will use a build tool such as Ant or Maven to take care of that (and other aspects of the build). It is well worth the effort of allowing one of those tools to take care of all aspects of your build, and it's even easier with a good IDE to help write the build.xml (Ant) or pom.xml (Maven).

NodeJS: How to decode base64 encoded string back to binary?

As of Node.js v6.0.0 using the constructor method has been deprecated and the following method should instead be used to construct a new buffer from a base64 encoded string:

var b64string = /* whatever */;
var buf = Buffer.from(b64string, 'base64'); // Ta-da

For Node.js v5.11.1 and below

Construct a new Buffer and pass 'base64' as the second argument:

var b64string = /* whatever */;
var buf = new Buffer(b64string, 'base64'); // Ta-da

If you want to be clean, you can check whether from exists :

if (typeof Buffer.from === "function") {
    // Node 5.10+
    buf = Buffer.from(b64string, 'base64'); // Ta-da
} else {
    // older Node versions, now deprecated
    buf = new Buffer(b64string, 'base64'); // Ta-da
}

how to call an ASP.NET c# method using javascript

The Jayrock RPC library is a great tool for doing this in a nice familliar way for C# developers. It allows you to create a .NET class with the methods you require, and add this class as a script (in a roundabout way) to your page. You can then create a js object of your type and call methods as you would any other object.

It essentially hides away ajax implementation and presents RPC in a familliar format. Mind you the best option really is to use ASP.NET MVC and use jQuery ajax calls to action methods - much more concise and less messing about!

Vim for Windows - What do I type to save and exit from a file?

Press ESC to make sure you are out of the edit mode and then type:

:wq

Regular expression to match non-ASCII characters?

You do the same way as any other character matching, but you use \uXXXX where XXXX is the unicode number of the character.

Look at: http://unicode.org/charts/charindex.html

http://unicode.org/charts/

http://www.decodeunicode.org/

Monad in plain English? (For the OOP programmer with no FP background)

I would say the closest OO analogy to monads is the "command pattern".

In the command pattern you wrap an ordinary statement or expression in a command object. The command object expose an execute method which executes the wrapped statement. So statement are turned into first class objects which can passed around and executed at will. Commands can be composed so you can create a program-object by chaining and nesting command-objects.

The commands are executed by a separate object, the invoker. The benefit of using the command pattern (rather than just execute a series of ordinary statements) is that different invokers can apply different logic to how the commands should be executed.

The command pattern could be used to add (or remove) language features which is not supported by the host language. For example, in a hypothetical OO language without exceptions, you could add exception semantics by exposing "try" and "throw" methods to the commands. When a command calls throw, the invoker backtracks through the list (or tree) of commands until the last "try" call. Conversely, you could remove exception semantic from a language (if you believe exceptions are bad) by catching all exceptions thrown by each individual commands, and turning them into error codes which are then passed to the next command.

Even more fancy execution semantics like transactions, non-deterministic execution or continuations can be implemented like this in a language which doesn't support it natively. It is a pretty powerful pattern if you think about it.

Now in reality the command-patterns is not used as a general language feature like this. The overhead of turning each statement into a separate class would lead to an unbearable amount of boilerplate code. But in principle it can be used to solve the same problems as monads are used to solve in fp.

How to sort two lists (which reference each other) in the exact same way

an algorithmic solution:

list1 = [3,2,4,1, 1]
list2 = ['three', 'two', 'four', 'one', 'one2']


lis = [(list1[i], list2[i]) for i in range(len(list1))]
list1.sort()
list2 = [x[1] for i in range(len(list1)) for x in lis if x[0] == i]

Outputs: -> Output speed: 0.2s

>>>list1
>>>[1, 1, 2, 3, 4]
>>>list2
>>>['one', 'one2', 'two', 'three', 'four']

@Autowired - No qualifying bean of type found for dependency

I had this happen because I added an autowired dependency to my service class but forgot to add it to the injected mocks in my service unit test.

The unit test exception appeared to report a problem in the service class when the problem was actually in the unit test. In retrospect, the error message told me exactly what the problem was.

Git: See my last commit

git log -1 --name-status

Does the work for me.

How to extract this specific substring in SQL Server?

Combine the SUBSTRING(), LEFT(), and CHARINDEX() functions.

SELECT LEFT(SUBSTRING(YOUR_FIELD,
                      CHARINDEX(';', YOUR_FIELD) + 1, 100),
                      CHARINDEX('[', YOUR_FIELD) - 1)
FROM YOUR_TABLE;

This assumes your field length will never exceed 100, but you can make it smarter to account for that if necessary by employing the LEN() function. I didn't bother since there's enough going on in there already, and I don't have an instance to test against, so I'm just eyeballing my parentheses, etc.

How to escape the % (percent) sign in C's printf?

The backslash in C is used to escape characters in strings. Strings would not recognize % as a special character, and therefore no escape would be necessary. printf is another matter: use %% to print one %.

How to do what head, tail, more, less, sed do in Powershell?

I got some better solutions:

gc log.txt -ReadCount 5 | %{$_;throw "pipeline end!"} # head
gc log.txt | %{$num=0;}{$num++;"$num $_"}             # cat -n
gc log.txt | %{$num=0;}{$num++; if($num -gt 2 -and $num -lt 7){"$num $_"}} # sed

Is there an equivalent to the SUBSTRING function in MS Access SQL?

You can use the VBA string functions (as @onedaywhen points out in the comments, they are not really the VBA functions, but their equivalents from the MS Jet libraries. As far as function signatures go, they are called and work the same, even though the actual presence of MS Access is not required for them to be available.):

SELECT DISTINCT Left(LastName, 1)
FROM Authors;

SELECT DISTINCT Mid(LastName, 1, 1)
FROM Authors;

How to crop a CvMat in OpenCV?

OpenCV has region of interest functions which you may find useful. If you are using the cv::Mat then you could use something like the following.

// You mention that you start with a CVMat* imagesource
CVMat * imagesource;

// Transform it into the C++ cv::Mat format
cv::Mat image(imagesource); 

// Setup a rectangle to define your region of interest
cv::Rect myROI(10, 10, 100, 100);

// Crop the full image to that image contained by the rectangle myROI
// Note that this doesn't copy the data
cv::Mat croppedImage = image(myROI);

Documentation for extracting sub image

Can I do Model->where('id', ARRAY) multiple where conditions?

There's whereIn():

$items = DB::table('items')->whereIn('id', [1, 2, 3])->get();

Removing packages installed with go get

You can delete the archive files and executable binaries that go install (or go get) produces for a package with go clean -i importpath.... These normally reside under $GOPATH/pkg and $GOPATH/bin, respectively.

Be sure to include ... on the importpath, since it appears that, if a package includes an executable, go clean -i will only remove that and not archive files for subpackages, like gore/gocode in the example below.

Source code then needs to be removed manually from $GOPATH/src.

go clean has an -n flag for a dry run that prints what will be run without executing it, so you can be certain (see go help clean). It also has a tempting -r flag to recursively clean dependencies, which you probably don't want to actually use since you'll see from a dry run that it will delete lots of standard library archive files!

A complete example, which you could base a script on if you like:

$ go get -u github.com/motemen/gore

$ which gore
/Users/ches/src/go/bin/gore

$ go clean -i -n github.com/motemen/gore...
cd /Users/ches/src/go/src/github.com/motemen/gore
rm -f gore gore.exe gore.test gore.test.exe commands commands.exe commands_test commands_test.exe complete complete.exe complete_test complete_test.exe debug debug.exe helpers_test helpers_test.exe liner liner.exe log log.exe main main.exe node node.exe node_test node_test.exe quickfix quickfix.exe session_test session_test.exe terminal_unix terminal_unix.exe terminal_windows terminal_windows.exe utils utils.exe
rm -f /Users/ches/src/go/bin/gore
cd /Users/ches/src/go/src/github.com/motemen/gore/gocode
rm -f gocode.test gocode.test.exe
rm -f /Users/ches/src/go/pkg/darwin_amd64/github.com/motemen/gore/gocode.a

$ go clean -i github.com/motemen/gore...

$ which gore

$ tree $GOPATH/pkg/darwin_amd64/github.com/motemen/gore
/Users/ches/src/go/pkg/darwin_amd64/github.com/motemen/gore

0 directories, 0 files

# If that empty directory really bugs you...
$ rmdir $GOPATH/pkg/darwin_amd64/github.com/motemen/gore

$ rm -rf $GOPATH/src/github.com/motemen/gore

Note that this information is based on the go tool in Go version 1.5.1.

python plot normal distribution

Use seaborn instead i am using distplot of seaborn with mean=5 std=3 of 1000 values

value = np.random.normal(loc=5,scale=3,size=1000)
sns.distplot(value)

You will get a normal distribution curve

jQuery UI Sortable Position

Use update instead of stop

http://api.jqueryui.com/sortable/

update( event, ui )

Type: sortupdate

This event is triggered when the user stopped sorting and the DOM position has changed.

stop( event, ui )

Type: sortstop

This event is triggered when sorting has stopped. event Type: Event

Piece of code:

http://jsfiddle.net/7a1836ce/

<script type="text/javascript">

var sortable    = new Object();
sortable.s1     = new Array(1, 2, 3, 4, 5);
sortable.s2     = new Array(1, 2, 3, 4, 5);
sortable.s3     = new Array(1, 2, 3, 4, 5);
sortable.s4     = new Array(1, 2, 3, 4, 5);
sortable.s5     = new Array(1, 2, 3, 4, 5);

sortingExample();

function sortingExample()
{
    // Init vars

    var tDiv    = $('<div></div>');
    var tSel    = '';

    // ul
    for (var tName in sortable)
    {

        // Creating ul list
        tDiv.append(createUl(sortable[tName], tName));
        // Add selector id
        tSel += '#' + tName + ',';

    }

    $('body').append('<div id="divArrayInfo"></div>');
    $('body').append(tDiv);

    // ul sortable params

    $(tSel).sortable({connectWith:tSel,
       start: function(event, ui) 
       {
            ui.item.startPos = ui.item.index();
       },
        update: function(event, ui)
        {
            var a   = ui.item.startPos;
            var b   = ui.item.index();
            var id = this.id;

            // If element moved to another Ul then 'update' will be called twice
            // 1st from sender list
            // 2nd from receiver list
            // Skip call from sender. Just check is element removed or not

            if($('#' + id + ' li').length < sortable[id].length)
            {
                return;
            }

            if(ui.sender === null)
            {
                sortArray(a, b, this.id, this.id);
            }
            else
            {
                sortArray(a, b, $(ui.sender).attr('id'), this.id);
            }

            printArrayInfo();

        }
    }).disableSelection();;

// Add styles

    $('<style>')
    .attr('type', 'text/css')
    .html(' body {background:black; color:white; padding:50px;} .sortableClass { clear:both; display: block; overflow: hidden; list-style-type: none; } .sortableClass li { border: 1px solid grey; float:left; clear:none; padding:20px; }')
    .appendTo('head');


    printArrayInfo();

}

function printArrayInfo()
{

    var tStr = '';

    for ( tName in sortable)
    {

        tStr += tName + ': ';

        for(var i=0; i < sortable[tName].length; i++)
        {

            // console.log(sortable[tName][i]);
            tStr += sortable[tName][i] + ', ';

        }

        tStr += '<br>';

    }

    $('#divArrayInfo').html(tStr);

}


function createUl(tArray, tId)
{

    var tUl = $('<ul>', {id:tId, class:'sortableClass'})

    for(var i=0; i < tArray.length; i++)
    {

        // Create Li element
        var tLi = $('<li>' + tArray[i] + '</li>');
        tUl.append(tLi);

    }

    return tUl;
}

function sortArray(a, b, idA, idB)
{
    var c;

    c = sortable[idA].splice(a, 1);
    sortable[idB].splice(b, 0, c);      

}
</script>

Python: split a list based on a condition?

Inspired by @gnibbler's great (but terse!) answer, we can apply that approach to map to multiple partitions:

from collections import defaultdict

def splitter(l, mapper):
    """Split an iterable into multiple partitions generated by a callable mapper."""

    results = defaultdict(list)

    for x in l:
        results[mapper(x)] += [x]

    return results

Then splitter can then be used as follows:

>>> l = [1, 2, 3, 4, 2, 3, 4, 5, 6, 4, 3, 2, 3]
>>> split = splitter(l, lambda x: x % 2 == 0)  # partition l into odds and evens
>>> split.items()
>>> [(False, [1, 3, 3, 5, 3, 3]), (True, [2, 4, 2, 4, 6, 4, 2])]

This works for more than two partitions with a more complicated mapping (and on iterators, too):

>>> import math
>>> l = xrange(1, 23)
>>> split = splitter(l, lambda x: int(math.log10(x) * 5))
>>> split.items()
[(0, [1]),
 (1, [2]),
 (2, [3]),
 (3, [4, 5, 6]),
 (4, [7, 8, 9]),
 (5, [10, 11, 12, 13, 14, 15]),
 (6, [16, 17, 18, 19, 20, 21, 22])]

Or using a dictionary to map:

>>> map = {'A': 1, 'X': 2, 'B': 3, 'Y': 1, 'C': 2, 'Z': 3}
>>> l = ['A', 'B', 'C', 'C', 'X', 'Y', 'Z', 'A', 'Z']
>>> split = splitter(l, map.get)
>>> split.items()
(1, ['A', 'Y', 'A']), (2, ['C', 'C', 'X']), (3, ['B', 'Z', 'Z'])]

source command not found in sh shell

On Ubuntu, instead of using sh scriptname.sh to run the file, I've used . scriptname.sh and it worked! The first line of my file contains: #!/bin/bash

use this command to run the script

.name_of_script.sh

PHP mailer multiple address

You need to call the AddAddress method once for every recipient. Like so:

$mail->AddAddress('[email protected]', 'Person One');
$mail->AddAddress('[email protected]', 'Person Two');
// ..

Better yet, add them as Carbon Copy recipients.

$mail->AddCC('[email protected]', 'Person One');
$mail->AddCC('[email protected]', 'Person Two');
// ..

To make things easy, you should loop through an array to do this.

$recipients = array(
   '[email protected]' => 'Person One',
   '[email protected]' => 'Person Two',
   // ..
);
foreach($recipients as $email => $name)
{
   $mail->AddCC($email, $name);
}

What could cause java.lang.reflect.InvocationTargetException?

This describes something like,

InvocationTargetException is a checked exception that wraps an exception thrown by an invoked method or constructor. As of release 1.4, this exception has been retrofitted to conform to the general purpose exception-chaining mechanism. The "target exception" that is provided at construction time and accessed via the getTargetException() method is now known as the cause, and may be accessed via the Throwable.getCause() method, as well as the aforementioned "legacy method."

Scripting SQL Server permissions

Our version:

SET NOCOUNT ON

DECLARE @message NVARCHAR(MAX)

-- GENERATE LOGINS CREATE SCRIPT


USE [master]

-- creating accessory procedure

IF EXISTS (SELECT 1 FROM    sys.objects WHERE   object_id = OBJECT_ID(N'sp_hexadecimal') AND type IN ( N'P', N'PC' )) 
DROP PROCEDURE [dbo].[sp_hexadecimal]
EXEC('
CREATE PROCEDURE [dbo].[sp_hexadecimal]
    @binvalue varbinary(256),
    @hexvalue varchar (514) OUTPUT
AS
DECLARE @charvalue varchar (514)
DECLARE @i int
DECLARE @length int
DECLARE @hexstring char(16)
SELECT @charvalue = ''0x''
SELECT @i = 1
SELECT @length = DATALENGTH (@binvalue)
SELECT @hexstring = ''0123456789ABCDEF''
WHILE (@i <= @length)
BEGIN
  DECLARE @tempint int
  DECLARE @firstint int
  DECLARE @secondint int
  SELECT @tempint = CONVERT(int, SUBSTRING(@binvalue,@i,1))
  SELECT @firstint = FLOOR(@tempint/16)
  SELECT @secondint = @tempint - (@firstint*16)
  SELECT @charvalue = @charvalue +
    SUBSTRING(@hexstring, @firstint+1, 1) +
    SUBSTRING(@hexstring, @secondint+1, 1)
  SELECT @i = @i + 1
END

SELECT @hexvalue = @charvalue')

SET @message = '-- CREATE LOGINS' + CHAR(13) + CHAR(13) +'USE [master]' + CHAR(13)

DECLARE @name sysname
DECLARE @type varchar (1)
DECLARE @hasaccess int
DECLARE @denylogin int
DECLARE @is_disabled int
DECLARE @PWD_varbinary  varbinary (256)
DECLARE @PWD_string  varchar (514)
DECLARE @SID_varbinary varbinary (85)
DECLARE @SID_string varchar (514)
DECLARE @tmpstr  NVARCHAR(MAX)
DECLARE @is_policy_checked varchar (3)
DECLARE @is_expiration_checked varchar (3)

DECLARE @defaultdb sysname

DECLARE login_curs CURSOR FOR
      SELECT p.sid, p.name, p.type, p.is_disabled, p.default_database_name, l.hasaccess, l.denylogin FROM 
sys.server_principals p LEFT JOIN sys.syslogins l
      ON ( l.name = p.name ) WHERE p.type IN ( 'S', 'G', 'U' ) AND p.name <> 'sa'

OPEN login_curs

FETCH NEXT FROM login_curs INTO @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @hasaccess, @denylogin
IF (@@fetch_status = -1)
BEGIN
  PRINT 'No login(s) found.'
  CLOSE login_curs
  DEALLOCATE login_curs
END

WHILE (@@fetch_status <> -1)
BEGIN
  IF (@@fetch_status <> -2)
  BEGIN

    IF (@type IN ( 'G', 'U'))
    BEGIN -- NT authenticated account/group

      SET @tmpstr = 'IF NOT EXISTS (SELECT loginname FROM master.dbo.syslogins WHERE name = ''' + @name + ''' AND dbname = ''' + @defaultdb + ''')' + CHAR(13) +
                    'BEGIN TRY' + CHAR(13) +
                    '   CREATE LOGIN ' + QUOTENAME( @name ) + ' FROM WINDOWS WITH DEFAULT_DATABASE = [' + @defaultdb + ']'

    END
    ELSE BEGIN -- SQL Server authentication
        -- obtain password and sid
            SET @PWD_varbinary = CAST( LOGINPROPERTY( @name, 'PasswordHash' ) AS varbinary (256) )
        EXEC sp_hexadecimal @PWD_varbinary, @PWD_string OUT
        EXEC sp_hexadecimal @SID_varbinary,@SID_string OUT

        -- obtain password policy state
        SELECT @is_policy_checked = CASE is_policy_checked WHEN 1 THEN 'ON' WHEN 0 THEN 'OFF' ELSE NULL END FROM sys.sql_logins WHERE name = @name
        SELECT @is_expiration_checked = CASE is_expiration_checked WHEN 1 THEN 'ON' WHEN 0 THEN 'OFF' ELSE NULL END FROM sys.sql_logins WHERE name = @name

            SET @tmpstr = 'IF NOT EXISTS (SELECT loginname FROM master.dbo.syslogins WHERE name = ''' + @name + ''' AND dbname = ''' + @defaultdb + ''')' + CHAR(13) +
                    'BEGIN TRY' + CHAR(13) +
                    '   CREATE LOGIN ' + QUOTENAME( @name ) + ' WITH PASSWORD = ' + @PWD_string + ' HASHED, SID = ' + @SID_string + ', DEFAULT_DATABASE = [' + @defaultdb + ']'

        IF ( @is_policy_checked IS NOT NULL )
        BEGIN
          SET @tmpstr = @tmpstr + ', CHECK_POLICY = ' + @is_policy_checked
        END
        IF ( @is_expiration_checked IS NOT NULL )
        BEGIN
          SET @tmpstr = @tmpstr + ', CHECK_EXPIRATION = ' + @is_expiration_checked
        END
    END
    IF (@denylogin = 1)
    BEGIN -- login is denied access
      SET @tmpstr = @tmpstr + '; DENY CONNECT SQL TO ' + QUOTENAME( @name )
    END
    ELSE IF (@hasaccess = 0)
    BEGIN -- login exists but does not have access
      SET @tmpstr = @tmpstr + '; REVOKE CONNECT SQL TO ' + QUOTENAME( @name )
    END
    IF (@is_disabled = 1)
    BEGIN -- login is disabled
      SET @tmpstr = @tmpstr + '; ALTER LOGIN ' + QUOTENAME( @name ) + ' DISABLE'
    END

    SET @tmpstr = @tmpstr + CHAR(13) + 'END TRY' + CHAR(13) + 'BEGIN CATCH' + CHAR(13) + 'END CATCH'

    SET @message = @message + CHAR(13) + @tmpstr

  END

  FETCH NEXT FROM login_curs INTO @SID_varbinary, @name, @type, @is_disabled, @defaultdb, @hasaccess, @denylogin
   END
CLOSE login_curs
DEALLOCATE login_curs

--removing accessory procedure

DROP PROCEDURE [dbo].[sp_hexadecimal]


-- GENERATE SERVER PERMISSIONS
USE [master]

DECLARE @ServerPrincipal SYSNAME
DECLARE @PrincipalType SYSNAME 
DECLARE @PermissionName SYSNAME
DECLARE @StateDesc SYSNAME

SET @message = @message + CHAR(13) + CHAR(13) + '-- CREATE SERVER PERMISSIONS' + CHAR(13) + CHAR(13) +'USE [master]' + CHAR(13)

DECLARE server_permissions_curs CURSOR FOR
SELECT
  [srvprin].[name] [server_principal], 
  [srvprin].[type_desc] [principal_type], 
  [srvperm].[permission_name], 
  [srvperm].[state_desc]  
FROM [sys].[server_permissions] srvperm 
  INNER JOIN [sys].[server_principals] srvprin 
    ON [srvperm].[grantee_principal_id] = [srvprin].[principal_id] 
WHERE [srvprin].[type] IN ('S', 'U', 'G') AND [srvprin].name NOT IN ('sa', 'dbo', 'information_schema', 'sys')
ORDER BY [server_principal], [permission_name]; 

OPEN server_permissions_curs

FETCH NEXT FROM server_permissions_curs INTO @ServerPrincipal, @PrincipalType, @PermissionName, @StateDesc 

WHILE (@@fetch_status <> -1)
BEGIN

    SET @message = @message + CHAR(13) + 'BEGIN TRY' + CHAR(13) + 
                    @StateDesc + N' ' + @PermissionName + N' TO ' + QUOTENAME(@ServerPrincipal) + 
                    + CHAR(13) + 'END TRY' + CHAR(13) + 'BEGIN CATCH' + CHAR(13) + 'END CATCH'

    FETCH NEXT FROM server_permissions_curs INTO @ServerPrincipal, @PrincipalType, @PermissionName, @StateDesc 
END
CLOSE server_permissions_curs
DEALLOCATE server_permissions_curs

--GENERATE USERS AND PERMISSION SCRIPT FOR EVERY DATABASE

SET @message = @message + CHAR(13) + CHAR(13) + N'--ENUMERATE DATABASES'

DECLARE @databases TABLE (
    DatabaseName SYSNAME,
    DatabaseSize INT,
    Remarks SYSNAME NULL
)

INSERT INTO
@databases EXEC sp_databases

DECLARE @DatabaseName SYSNAME


DECLARE database_curs CURSOR FOR
SELECT DatabaseName FROM @databases WHERE DatabaseName IN (N'${DatabaseName}')

OPEN database_curs

FETCH NEXT FROM database_curs INTO @DatabaseName
WHILE (@@fetch_status <> -1)
BEGIN

    SET @tmpStr = 

    N'USE ' + QUOTENAME(@DatabaseName) + '

    DECLARE @tmpstr  NVARCHAR(MAX)

    SET @messageOut = CHAR(13) + CHAR(13) + ''USE ' + QUOTENAME(@DatabaseName) + ''' + CHAR(13)

    -- GENERATE USERS SCRIPT 

    SET @messageOut = @messageOut + CHAR(13) + ''-- CREATE USERS '' + CHAR(13)

    DECLARE @users TABLE (
    UserName SYSNAME Null,  
    RoleName SYSNAME Null,  
    LoginName SYSNAME Null, 
    DefDBName SYSNAME Null, 
    DefSchemaName SYSNAME Null, 
    UserID INT Null,    
    [SID] varbinary(85) Null
    )

    INSERT INTO
    @users   EXEC sp_helpuser

    DECLARE @UserName SYSNAME
    DECLARE @LoginName SYSNAME 
    DECLARE @DefSchemaName SYSNAME

    DECLARE user_curs CURSOR FOR
    SELECT UserName, LoginName, DefSchemaName FROM @users

    OPEN user_curs

    FETCH NEXT FROM user_curs INTO @UserName, @LoginName, @DefSchemaName
    WHILE (@@fetch_status <> -1)
    BEGIN

        SET @messageOut = @messageOut + CHAR(13) + 
                        ''IF NOT EXISTS (SELECT * FROM sys.database_principals WHERE name = N''''''+ @UserName +'''''')''
                        + CHAR(13) + ''BEGIN TRY'' + CHAR(13) + 
                        ''  CREATE USER '' + QUOTENAME(@UserName)

        IF (@LoginName IS NOT NULL)
            SET @messageOut = @messageOut + '' FOR LOGIN '' + QUOTENAME(@LoginName)
        ELSE
            SET @messageOut = @messageOut + '' WITHOUT LOGIN''  

        IF (@DefSchemaName IS NOT NULL)
            SET @messageOut = @messageOut + '' WITH DEFAULT_SCHEMA = ''  + QUOTENAME(@DefSchemaName)

        SET @messageOut = @messageOut + CHAR(13) + ''END TRY'' + CHAR(13) + ''BEGIN CATCH'' + CHAR(13) + ''END CATCH''

        FETCH NEXT FROM user_curs INTO @UserName, @LoginName, @DefSchemaName
    END
    CLOSE user_curs
    DEALLOCATE user_curs

    -- GENERATE ROLES

    SET @messageOut = @messageOut + CHAR(13) + CHAR(13) + ''-- CREATE ROLES '' + CHAR(13)

    SELECT @messageOut = @messageOut + CHAR(13) + ''BEGIN TRY'' + CHAR(13) + 
                        N''EXEC sp_addrolemember N''''''+ rp.name +'''''', N''''''+ mp.name +''''''''
                        + CHAR(13) + ''END TRY'' + CHAR(13) + ''BEGIN CATCH'' + CHAR(13) + ''END CATCH''
    FROM sys.database_role_members drm
    join sys.database_principals rp ON (drm.role_principal_id = rp.principal_id)
    join sys.database_principals mp ON (drm.member_principal_id = mp.principal_id)
    WHERE mp.name NOT IN (N''dbo'')


    -- GENERATE PERMISSIONS

    SET @messageOut = @messageOut + CHAR(13) + CHAR(13) + ''-- CREATE PERMISSIONS '' + CHAR(13)

    SELECT @messageOut = @messageOut + CHAR(13) + ''BEGIN TRY'' + CHAR(13) + 
                        ''  GRANT '' + dp.permission_name collate latin1_general_cs_as +
                        '' ON '' + QUOTENAME(s.name) + ''.'' + QUOTENAME(o.name) + '' TO '' + QUOTENAME(dpr.name)  +
                        + CHAR(13) + ''END TRY'' + CHAR(13) + ''BEGIN CATCH'' + CHAR(13) + ''END CATCH''
    FROM sys.database_permissions AS dp
    INNER JOIN sys.objects AS o ON dp.major_id=o.object_id
    INNER JOIN sys.schemas AS s ON o.schema_id = s.schema_id
    INNER JOIN sys.database_principals AS dpr ON dp.grantee_principal_id=dpr.principal_id
    WHERE dpr.name NOT IN (''public'',''guest'')'

    EXECUTE sp_executesql @tmpStr, N'@messageOut NVARCHAR(MAX) OUTPUT', @messageOut = @tmpstr OUTPUT

    SET @message = @message + @tmpStr

    FETCH NEXT FROM database_curs INTO @DatabaseName
END
CLOSE database_curs
DEALLOCATE database_curs

SELECT @message

What is the default initialization of an array in Java?

Thorbjørn Ravn Andersen answered for most of the data types. Since there was a heated discussion about array,

Quoting from the jls spec http://docs.oracle.com/javase/specs/jls/se7/html/jls-4.html#jls-4.12.5 "array component is initialized with a default value when it is created"

I think irrespective of whether array is local or instance or class variable it will with default values

What is the difference between json.load() and json.loads() functions

Just going to add a simple example to what everyone has explained,

json.load()

json.load can deserialize a file itself i.e. it accepts a file object, for example,

# open a json file for reading and print content using json.load
with open("/xyz/json_data.json", "r") as content:
  print(json.load(content))

will output,

{u'event': {u'id': u'5206c7e2-da67-42da-9341-6ea403c632c7', u'name': u'Sufiyan Ghori'}}

If I use json.loads to open a file instead,

# you cannot use json.loads on file object
with open("json_data.json", "r") as content:
  print(json.loads(content))

I would get this error:

TypeError: expected string or buffer

json.loads()

json.loads() deserialize string.

So in order to use json.loads I will have to pass the content of the file using read() function, for example,

using content.read() with json.loads() return content of the file,

with open("json_data.json", "r") as content:
  print(json.loads(content.read()))

Output,

{u'event': {u'id': u'5206c7e2-da67-42da-9341-6ea403c632c7', u'name': u'Sufiyan Ghori'}}

That's because type of content.read() is string, i.e. <type 'str'>

If I use json.load() with content.read(), I will get error,

with open("json_data.json", "r") as content:
  print(json.load(content.read()))

Gives,

AttributeError: 'str' object has no attribute 'read'

So, now you know json.load deserialze file and json.loads deserialize a string.

Another example,

sys.stdin return file object, so if i do print(json.load(sys.stdin)), I will get actual json data,

cat json_data.json | ./test.py

{u'event': {u'id': u'5206c7e2-da67-42da-9341-6ea403c632c7', u'name': u'Sufiyan Ghori'}}

If I want to use json.loads(), I would do print(json.loads(sys.stdin.read())) instead.

Do I cast the result of malloc?

I prefer to do the cast, but not manually. My favorite is using g_new and g_new0 macros from glib. If glib is not used, I would add similar macros. Those macros reduce code duplication without compromising type safety. If you get the type wrong, you would get an implicit cast between non-void pointers, which would cause a warning (error in C++). If you forget to include the header that defines g_new and g_new0, you would get an error. g_new and g_new0 both take the same arguments, unlike malloc that takes fewer arguments than calloc. Just add 0 to get zero-initialized memory. The code can be compiled with a C++ compiler without changes.

How does database indexing work?

Why is it needed?

When data is stored on disk-based storage devices, it is stored as blocks of data. These blocks are accessed in their entirety, making them the atomic disk access operation. Disk blocks are structured in much the same way as linked lists; both contain a section for data, a pointer to the location of the next node (or block), and both need not be stored contiguously.

Due to the fact that a number of records can only be sorted on one field, we can state that searching on a field that isn’t sorted requires a Linear Search which requires N/2 block accesses (on average), where N is the number of blocks that the table spans. If that field is a non-key field (i.e. doesn’t contain unique entries) then the entire tablespace must be searched at N block accesses.

Whereas with a sorted field, a Binary Search may be used, which has log2 N block accesses. Also since the data is sorted given a non-key field, the rest of the table doesn’t need to be searched for duplicate values, once a higher value is found. Thus the performance increase is substantial.

What is indexing?

Indexing is a way of sorting a number of records on multiple fields. Creating an index on a field in a table creates another data structure which holds the field value, and a pointer to the record it relates to. This index structure is then sorted, allowing Binary Searches to be performed on it.

The downside to indexing is that these indices require additional space on the disk since the indices are stored together in a table using the MyISAM engine, this file can quickly reach the size limits of the underlying file system if many fields within the same table are indexed.

How does it work?

Firstly, let’s outline a sample database table schema;

Field name       Data type      Size on disk
id (Primary key) Unsigned INT   4 bytes
firstName        Char(50)       50 bytes
lastName         Char(50)       50 bytes
emailAddress     Char(100)      100 bytes

Note: char was used in place of varchar to allow for an accurate size on disk value. This sample database contains five million rows and is unindexed. The performance of several queries will now be analyzed. These are a query using the id (a sorted key field) and one using the firstName (a non-key unsorted field).

Example 1 - sorted vs unsorted fields

Given our sample database of r = 5,000,000 records of a fixed size giving a record length of R = 204 bytes and they are stored in a table using the MyISAM engine which is using the default block size B = 1,024 bytes. The blocking factor of the table would be bfr = (B/R) = 1024/204 = 5 records per disk block. The total number of blocks required to hold the table is N = (r/bfr) = 5000000/5 = 1,000,000 blocks.

A linear search on the id field would require an average of N/2 = 500,000 block accesses to find a value, given that the id field is a key field. But since the id field is also sorted, a binary search can be conducted requiring an average of log2 1000000 = 19.93 = 20 block accesses. Instantly we can see this is a drastic improvement.

Now the firstName field is neither sorted nor a key field, so a binary search is impossible, nor are the values unique, and thus the table will require searching to the end for an exact N = 1,000,000 block accesses. It is this situation that indexing aims to correct.

Given that an index record contains only the indexed field and a pointer to the original record, it stands to reason that it will be smaller than the multi-field record that it points to. So the index itself requires fewer disk blocks than the original table, which therefore requires fewer block accesses to iterate through. The schema for an index on the firstName field is outlined below;

Field name       Data type      Size on disk
firstName        Char(50)       50 bytes
(record pointer) Special        4 bytes

Note: Pointers in MySQL are 2, 3, 4 or 5 bytes in length depending on the size of the table.

Example 2 - indexing

Given our sample database of r = 5,000,000 records with an index record length of R = 54 bytes and using the default block size B = 1,024 bytes. The blocking factor of the index would be bfr = (B/R) = 1024/54 = 18 records per disk block. The total number of blocks required to hold the index is N = (r/bfr) = 5000000/18 = 277,778 blocks.

Now a search using the firstName field can utilize the index to increase performance. This allows for a binary search of the index with an average of log2 277778 = 18.08 = 19 block accesses. To find the address of the actual record, which requires a further block access to read, bringing the total to 19 + 1 = 20 block accesses, a far cry from the 1,000,000 block accesses required to find a firstName match in the non-indexed table.

When should it be used?

Given that creating an index requires additional disk space (277,778 blocks extra from the above example, a ~28% increase), and that too many indices can cause issues arising from the file systems size limits, careful thought must be used to select the correct fields to index.

Since indices are only used to speed up the searching for a matching field within the records, it stands to reason that indexing fields used only for output would be simply a waste of disk space and processing time when doing an insert or delete operation, and thus should be avoided. Also given the nature of a binary search, the cardinality or uniqueness of the data is important. Indexing on a field with a cardinality of 2 would split the data in half, whereas a cardinality of 1,000 would return approximately 1,000 records. With such a low cardinality the effectiveness is reduced to a linear sort, and the query optimizer will avoid using the index if the cardinality is less than 30% of the record number, effectively making the index a waste of space.

Objective-C implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int' warning

The count method of NSArray returns an NSUInteger, and on the 64-bit OS X platform

NSUInteger is defined as unsigned long, and
unsigned long is a 64-bit unsigned integer.
int is a 32-bit integer.

So int is a "smaller" datatype than NSUInteger, therefore the compiler warning.

See also NSUInteger in the "Foundation Data Types Reference":

When building 32-bit applications, NSUInteger is a 32-bit unsigned integer. A 64-bit application treats NSUInteger as a 64-bit unsigned integer.

To fix that compiler warning, you can either declare the local count variable as

NSUInteger count;

or (if you are sure that your array will never contain more than 2^31-1 elements!), add an explicit cast:

int count = (int)[myColors count];

Python equivalent of a given wget command

easy as py:

class Downloder():
    def download_manager(self, url, destination='Files/DownloderApp/', try_number="10", time_out="60"):
        #threading.Thread(target=self._wget_dl, args=(url, destination, try_number, time_out, log_file)).start()
        if self._wget_dl(url, destination, try_number, time_out, log_file) == 0:
            return True
        else:
            return False


    def _wget_dl(self,url, destination, try_number, time_out):
        import subprocess
        command=["wget", "-c", "-P", destination, "-t", try_number, "-T", time_out , url]
        try:
            download_state=subprocess.call(command)
        except Exception as e:
            print(e)
        #if download_state==0 => successfull download
        return download_state

What are Java command line options to set to allow JVM to be remotely debugged?

For java 1.5 or greater:

java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 <YourAppName>

For java 1.4:

java -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005 <YourAppName>

For java 1.3:

java -Xnoagent -Djava.compiler=NONE -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005 <YourAppName>

Here is output from a simple program:

java -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=1044 HelloWhirled
Listening for transport dt_socket at address: 1044
Hello whirled

Xcode 6: Keyboard does not show up in simulator

in viewDidLoad add this line

yourUiTextField.becomeFirstResponder()

How to overcome the CORS issue in ReactJS

the simplest way what I found from a tutorial of "TraversyMedia" is that just use https://cors-anywhere.herokuapp.com in 'axios' or 'fetch' api

https://cors-anywhere.herokuapp.com/{type_your_url_here}

e.g.

axios.get(`https://cors-anywhere.herokuapp.com/https://www.api.com/`)

and in your case edit url as

url: 'https://cors-anywhere.herokuapp.com/https://www.api.com',

Regular Expression to match every new line character (\n) inside a <content> tag

Actually... you can't use a simple regex here, at least not one. You probably need to worry about comments! Someone may write:

<!-- <content> blah </content> -->

You can take two approaches here:

Strip all comments out first. Then use the regex approach.
Do not use regular expressions and use a context sensitive parsing approach that can keep track of whether or not you are nested in a comment.

Be careful.

I am also not so sure you can match all new lines at once. @Quartz suggested this one:

<content>([^\n]*\n+)+</content>

This will match any content tags that have a newline character RIGHT BEFORE the closing tag... but I'm not sure what you mean by matching all newlines. Do you want to be able to access all the matched newline characters? If so, your best bet is to grab all content tags, and then search for all the newline chars that are nested in between. Something more like this:

<content>.*</content>

BUT THERE IS ONE CAVEAT: regexes are greedy, so this regex will match the first opening tag to the last closing one. Instead, you HAVE to suppress the regex so it is not greedy. In languages like python, you can do this with the "?" regex symbol.

I hope with this you can see some of the pitfalls and figure out how you want to proceed. You are probably better off using an XML parsing library, then iterating over all the content tags.

I know I may not be offering the best solution, but at least I hope you will see the difficulty in this and why other answers may not be right...

UPDATE 1:

Let me summarize a bit more and add some more detail to my response. I am going to use python's regex syntax because it is what I am more used to (forgive me ahead of time... you may need to escape some characters... comment on my post and I will correct it):

To strip out comments, use this regex: Notice the "?" suppresses the .* to make it non-greedy.

Similarly, to search for content tags, use: .*?

Also, You may be able to try this out, and access each newline character with the match objects groups():

<content>(.*?(\n))+.*?</content>

I know my escaping is off, but it captures the idea. This last example probably won't work, but I think it's your best bet at expressing what you want. My suggestion remains: either grab all the content tags and do it yourself, or use a parsing library.

UPDATE 2:

So here is python code that ought to work. I am still unsure what you mean by "find" all newlines. Do you want the entire lines? Or just to count how many newlines. To get the actual lines, try:

#!/usr/bin/python

import re

def FindContentNewlines(xml_text):
    # May want to compile these regexes elsewhere, but I do it here for brevity
    comments = re.compile(r"<!--.*?-->", re.DOTALL)
    content = re.compile(r"<content>(.*?)</content>", re.DOTALL)
    newlines = re.compile(r"^(.*?)$", re.MULTILINE|re.DOTALL)

    # strip comments: this actually may not be reliable for "nested comments"
    # How does xml handle <!--  <!-- --> -->. I am not sure. But that COULD
    # be trouble.
    xml_text = re.sub(comments, "", xml_text)

    result = []
    all_contents = re.findall(content, xml_text)
    for c in all_contents:
        result.extend(re.findall(newlines, c))

    return result

if __name__ == "__main__":
    example = """

<!-- This stuff
ought to be omitted
<content>
  omitted
</content>
-->

This stuff is good
<content>
<p>
  haha!
</p>
</content>

This is not found
"""
    print FindContentNewlines(example)

This program prints the result:

 ['', '<p>', '  haha!', '</p>', '']

The first and last empty strings come from the newline chars immediately preceeding the first <p> and the one coming right after the </p>. All in all this (for the most part) does the trick. Experiment with this code and refine it for your needs. Print out stuff in the middle so you can see what the regexes are matching and not matching.

Hope this helps :-).

PS - I didn't have much luck trying out my regex from my first update to capture all the newlines... let me know if you do.

What is stability in sorting algorithms and why is it important?

If you assume what you are sorting are just numbers and only their values identify/distinguish them (e.g. elements with same value are identicle), then the stability-issue of sorting is meaningless.

However, objects with same priority in sorting may be distinct, and sometime their relative order is meaningful information. In this case, unstable sort generates problems.

For example, you have a list of data which contains the time cost [T] of all players to clean a maze with Level [L] in a game. Suppose we need to rank the players by how fast they clean the maze. However, an additional rule applies: players who clean the maze with higher-level always have a higher rank, no matter how long the time cost is.

Of course you might try to map the paired value [T,L] to a real number [R] with some algorithm which follows the rules and then rank all players with [R] value.

However, if stable sorting is feasible, then you may simply sort the entire list by [T] (Faster players first) and then by [L]. In this case, the relative order of players (by time cost) will not be changed after you grouped them by level of maze they cleaned.

PS: of course the approach to sort twice is not the best solution to the particular problem but to explain the question of poster it should be enough.

Main differences between SOAP and RESTful web services in Java

REST is easier to use for the most part and is more flexible. Unlike SOAP, REST doesn’t have to use XML to provide the response. We can find REST-based Web services that output the data in the Command Separated Value (CSV), JavaScript Object Notation (JSON) and Really Simple Syndication (RSS) formats.

We can obtain the output we need in a form that’s easy to parse within the language we need for our application.REST is more efficient (use smaller message formats), fast and closer to other Web technologies in design philosophy.

Content-Disposition:What are the differences between "inline" and "attachment"?

It might also be worth mentioning that inline will try to open Office Documents (xls, doc etc) directly from the server, which might lead to a User Credentials Prompt.

see this link:

http://forums.asp.net/t/1885657.aspx/1?Access+the+SSRS+Report+in+excel+format+on+server

somebody tried to deliver an Excel Report from SSRS via ASP.Net -> the user always got prompted to enter the credentials. After clicking cancel on the prompt it would be opened anyway...

If the Content Disposition is marked as Attachment it will automatically be saved to the temp folder after clicking open and then opened in Excel from the local copy.

How to get object length

Here's a jQuery-ised function of Innuendo's answer, ready for use.

$.extend({
    keyCount : function(o) {
        if(typeof o == "object") {
            var i, count = 0;
            for(i in o) {
                if(o.hasOwnProperty(i)) {
                    count++;
                }
            }
            return count;
        } else {
            return false;
        }
    }
});

Can be called like this:

var cnt = $.keyCount({"foo" : "bar"}); //cnt = 1;

How to convert a pandas DataFrame subset of columns AND rows into a numpy array?

.loc accept row and column selectors simultaneously (as do .ix/.iloc FYI) This is done in a single pass as well.

In [1]: df = DataFrame(np.random.rand(4,5), columns = list('abcde'))

In [2]: df
Out[2]: 
          a         b         c         d         e
0  0.669701  0.780497  0.955690  0.451573  0.232194
1  0.952762  0.585579  0.890801  0.643251  0.556220
2  0.900713  0.790938  0.952628  0.505775  0.582365
3  0.994205  0.330560  0.286694  0.125061  0.575153

In [5]: df.loc[df['c']>0.5,['a','d']]
Out[5]: 
          a         d
0  0.669701  0.451573
1  0.952762  0.643251
2  0.900713  0.505775

And if you want the values (though this should pass directly to sklearn as is); frames support the array interface

In [6]: df.loc[df['c']>0.5,['a','d']].values
Out[6]: 
array([[ 0.66970138,  0.45157274],
       [ 0.95276167,  0.64325143],
       [ 0.90071271,  0.50577509]])

Programs & Examples On #Resize

How to set iframe size dynamically

Resize a large bitmap file to scaled output file on Android

How to resize image automatically on browser width resize but keep same height?

WPF: Setting the Width (and Height) as a Percentage Value

Scale image to fit a bounding box

Merging two images with PHP

Set size of HTML page and browser window

How to resize a custom view programmatically?

Change form size at runtime in C#

How can I scale an entire web page with CSS?

Numpy Resize/Rescale Image

Set iframe content height to auto resize dynamically

How to auto resize and adjust Form controls with change in resolution

Delete item from array and shrink array

How to resize an image with OpenCV2.0 and Python2.6

Example doubling the image size

Example shrink image to fit a max height/width (keeping aspect ratio)

Using your code with cv2

The simplest way to resize an UIImage?

Change the size of a JTextField inside a JBorderLayout

Rerender view on browser resize with React

Resizing Images in VB.NET

How can I resize an image dynamically with CSS as the browser width/height changes?

Creating a textarea with auto-resize

Prevent div from moving while resizing the page

How to get full width in body element

How to center canvas in html5

How to resize images proportionally / keeping the aspect ratio?

PHPExcel auto size column width

Automatically resize images with browser size using CSS

How to resize an Image C#

AngularJS $watch window resize inside directive

How to resize datagridview control when form resizes

How can I resize an image using Java?

UIImage resize (Scale proportion)

Image resizing client-side with JavaScript before upload to the server

Input type "number" won't resize

How can I make all images of different height and width the same via CSS?

jquery $(window).width() and $(window).height() return different values when viewport has not been resized

Cross-browser window resize event - JavaScript / jQuery

How to easily resize/optimize an image size with iOS?

How do I disable form resizing for users?

Using jQuery To Get Size of Viewport

Android: How to Programmatically set the size of a Layout

Resizable table columns with jQuery

Resize jqGrid when browser is resized?

How to wait for the 'end' of 'resize' event and only then perform an action?

registerForRemoteNotificationTypes: is not supported in iOS 8.0 and later

Delete all duplicate rows Excel vba

What's the Android ADB shell "dumpsys" tool and what are its benefits?

Rails 4: before_filter vs. before_action

How to check whether a variable is a class or not?

Extracting text OpenCV

First and Second Image

Third Image

How to create a link to another PHP page

Using ADB to capture the screen

Is it possible to open a Windows Explorer window from PowerShell?

JSF(Primefaces) ajax update of several elements by ID's

How can I style a PHP echo text?

Could not find the main class, program will exit

Volatile vs. Interlocked vs. lock

Handling a Menu Item Click Event - Android

Best Way to do Columns in HTML/CSS

Error occurred during initialization of VM (java/lang/NoClassDefFoundError: java/lang/Object)

Difference between setUp() and setUpBeforeClass()

react button onClick redirect page

What is the difference between Linear search and Binary search?

How can I force clients to refresh JavaScript files?

Is there any free OCR library for Android?

How can I delete all cookies with JavaScript?

Fast ceiling of an integer division in C / C++

Alert handling in Selenium WebDriver (selenium 2) with Java

How to: "Separate table rows with a line"

How do I get the raw request body from the Request.Content object using .net 4 api endpoint

Compare two Lists for differences

Pass data to layout that are common to all pages

Server is already running in Rails

How to drop rows of Pandas DataFrame whose value in a certain column is NaN