getaddrinfo: nodename nor servname provided, or not known

rest-client's RestClient needs the http: scheme when resolving the URL. It calls Net::HTTP for you, which doesn't want the http: part, but rest-client takes care of that.

Is the URL the actual one you are attempting to reach? example.org is a valid domain used for testing and documentation and is reachable; I'd expect the "api" and "api_endpoint" parts to fail and see that when I try to reach them.

require 'socket'

IPSocket.getaddress('example.org') # => "2620:0:2d0:200::10"
IPSocket.getaddress('api.example.org') # => 
# ~> -:7:in `getaddress': getaddrinfo: nodename nor servname provided, or not known (SocketError)
# ~>    from -:7:in `<main>'

Here's what I get using Curl:

greg-mbp-wireless:~ greg$ curl api.example.org/api_endpoint
curl: (6) Couldn't resolve host 'api.example.org'
greg-mbp-wireless:~ greg$ curl example.org/api_endpoint
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body>
<h1>Not Found</h1>
<p>The requested URL /api_endpoint was not found on this server.</p>
<hr>
<address>Apache Server at example.org Port 80</address>
</body></html>
greg-mbp-wireless:~ greg$ curl example.org
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
  <META http-equiv="Content-Type" content="text/html; charset=utf-8">
  <TITLE>Example Web Page</TITLE>
</HEAD> 
<body>  
<p>You have reached this web page by typing &quot;example.com&quot;,
&quot;example.net&quot;,&quot;example.org&quot
  or &quot;example.edu&quot; into your web browser.</p>
<p>These domain names are reserved for use in documentation and are not available 
  for registration. See <a href="http://www.rfc-editor.org/rfc/rfc2606.txt">RFC 
  2606</a>, Section 3.</p>
</BODY>
</HTML>

Logical operator in a handlebars.js {{#if}} conditional

Correct Solution for AND/OR

Handlebars.registerHelper('and', function () {
    // Get function args and remove last one (function name)
    return Array.prototype.slice.call(arguments, 0, arguments.length - 1).every(Boolean);
});
Handlebars.registerHelper('or', function () {
    // Get function args and remove last one (function name)
    return Array.prototype.slice.call(arguments, 0, arguments.length - 1).some(Boolean);
});

Then call as follows

{{#if (or (eq questionType 'STARTTIME') (eq questionType 'ENDTIME') (..) ) }}

BTW: Note that the solution given here is incorrect, he's not subtracting the last argument which is the function name. https://stackoverflow.com/a/31632215/1005607

His original AND/OR was based on the full list of arguments

   and: function () {
        return Array.prototype.slice.call(arguments).every(Boolean);
    },
    or: function () {
        return Array.prototype.slice.call(arguments).some(Boolean);
    }

Can someone change that answer? I just wasted an hour trying to fix something in an answer recommended by 86 people. The fix is to filter out the last argument which is the function name. Array.prototype.slice.call(arguments, 0, arguments.length - 1)

Convert Mat to Array/Vector in OpenCV

Here is another possible solution assuming matrix have one column( you can reshape original Mat to one column Mat via reshape):

Mat matrix= Mat::zeros(20, 1, CV_32FC1);
vector<float> vec;
matrix.col(0).copyTo(vec);

How to disable registration new users in Laravel

add

use \Redirect;

at the top of the file

How to test Spring Data repositories?

tl;dr

To make it short - there's no way to unit test Spring Data JPA repositories reasonably for a simple reason: it's way to cumbersome to mock all the parts of the JPA API we invoke to bootstrap the repositories. Unit tests don't make too much sense here anyway, as you're usually not writing any implementation code yourself (see the below paragraph on custom implementations) so that integration testing is the most reasonable approach.

Details

We do quite a lot of upfront validation and setup to make sure you can only bootstrap an app that has no invalid derived queries etc.

We create and cache CriteriaQuery instances for derived queries to make sure the query methods do not contain any typos. This requires working with the Criteria API as well as the meta.model.
We verify manually defined queries by asking the EntityManager to create a Query instance for those (which effectively triggers query syntax validation).
We inspect the Metamodel for meta-data about the domain types handled to prepare is-new checks etc.

All stuff that you'd probably defer in a hand-written repository which might cause the application to break at runtime (due to invalid queries etc.).

If you think about it, there's no code you write for your repositories, so there's no need to write any unittests. There's simply no need to as you can rely on our test base to catch basic bugs (if you still happen to run into one, feel free to raise a ticket). However, there's definitely need for integration tests to test two aspects of your persistence layer as they are the aspects that related to your domain:

entity mappings
query semantics (syntax is verified on each bootstrap attempt anyway).

Integration tests

This is usually done by using an in-memory database and test cases that bootstrap a Spring ApplicationContext usually through the test context framework (as you already do), pre-populate the database (by inserting object instances through the EntityManager or repo, or via a plain SQL file) and then execute the query methods to verify the outcome of them.

Testing custom implementations

Custom implementation parts of the repository are written in a way that they don't have to know about Spring Data JPA. They are plain Spring beans that get an EntityManager injected. You might of course wanna try to mock the interactions with it but to be honest, unit-testing the JPA has not been a too pleasant experience for us as well as it works with quite a lot of indirections (EntityManager -> CriteriaBuilder, CriteriaQuery etc.) so that you end up with mocks returning mocks and so on.

How to find all links / pages on a website

Check out linkchecker—it will crawl the site (while obeying robots.txt) and generate a report. From there, you can script up a solution for creating the directory tree.

Cannot create SSPI context

This error usually comes when the Windows user account is expired and he is already logged in with old password. Just ask the user to restart his machine and check if the password is expired or he has changed the password. Hope this helps!!!!!

"NODE_ENV" is not recognized as an internal or external command, operable command or batch file

Most of the answers up there didn't help me..

What helped me was NODE_ENV=production&& nodemon app/app.js

Take note of the space. Good luck.

What are passive event listeners?

Passive event listeners are an emerging web standard, new feature shipped in Chrome 51 that provide a major potential boost to scroll performance. Chrome Release Notes.

It enables developers to opt-in to better scroll performance by eliminating the need for scrolling to block on touch and wheel event listeners.

Problem: All modern browsers have a threaded scrolling feature to permit scrolling to run smoothly even when expensive JavaScript is running, but this optimization is partially defeated by the need to wait for the results of any touchstart and touchmove handlers, which may prevent the scroll entirely by calling preventDefault() on the event.

Solution: {passive: true}

By marking a touch or wheel listener as passive, the developer is promising the handler won't call preventDefault to disable scrolling. This frees the browser up to respond to scrolling immediately without waiting for JavaScript, thus ensuring a reliably smooth scrolling experience for the user.

document.addEventListener("touchstart", function(e) {
    console.log(e.defaultPrevented);  // will be false
    e.preventDefault();   // does nothing since the listener is passive
    console.log(e.defaultPrevented);  // still false
}, Modernizr.passiveeventlisteners ? {passive: true} : false);

DOM Spec , Demo Video , Explainer Doc

Why does overflow:hidden not work in a <td>?

Best solution is to put a div into table cell with zero width. Tbody table cells will inherit their widths from widths defined the thead. Position:relative and negative margin should do the trick!

Here is a screenshot: https://flic.kr/p/nvRs4j

<body>
<!-- SOME CSS -->
<style>
    .cropped-table-cells,
    .cropped-table-cells tr td { 
        margin:0px;
        padding:0px;
        border-collapse:collapse;
    }
    .cropped-table-cells tr td {
        border:1px solid lightgray;
        padding:3px 5px 3px 5px;
    }
    .no-overflow {
        display:inline-block;
        white-space:nowrap;
        position:relative; /* must be relative */
        width:100%; /* fit to table cell width */
        margin-right:-1000px; /* technically this is a less than zero width object */
        overflow:hidden;
    }
</style>

<!-- CROPPED TABLE BODIES -->
<table class="cropped-table-cells">
    <thead>
        <tr>
            <td style="width:100px;" width="100"><span>ORDER<span></td>
            <td style="width:100px;" width="100"><span>NAME<span></td>
            <td style="width:200px;" width="200"><span>EMAIL</span></td>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td><span class="no-overflow">123</span></td>
            <td><span class="no-overflow">Lorem ipsum dolor sit amet, consectetur adipisicing elit</span></td>
            <td><span class="no-overflow">sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.</span></td>
    </tbody>
</table>
</body>

Can a table row expand and close?

Well, I'd say use the DIV instead of table as it would be much easier (but there's nothing wrong with using tables).

My approach would be to use jQuery.ajax and request more data from server and that way, the selected DIV (or TD if you use table) will automatically expand based on requested content.

That way, it saves bandwidth and makes it go faster as you don't load all content at once. It loads only when it's selected.

MVC ajax json post to controller action method

Below is how I got this working.

The Key point was: I needed to use the ViewModel associated with the view in order for the runtime to be able to resolve the object in the request.

[I know that that there is a way to bind an object other than the default ViewModel object but ended up simply populating the necessary properties for my needs as I could not get it to work]

[HttpPost]  
  public ActionResult GetDataForInvoiceNumber(MyViewModel myViewModel)  
  {            
     var invoiceNumberQueryResult = _viewModelBuilder.HydrateMyViewModelGivenInvoiceDetail(myViewModel.InvoiceNumber, myViewModel.SelectedCompanyCode);
     return Json(invoiceNumberQueryResult, JsonRequestBehavior.DenyGet);
  }

The JQuery script used to call this action method:

var requestData = {
         InvoiceNumber: $.trim(this.value),
         SelectedCompanyCode: $.trim($('#SelectedCompanyCode').val())
      };


      $.ajax({
         url: '/en/myController/GetDataForInvoiceNumber',
         type: 'POST',
         data: JSON.stringify(requestData),
         dataType: 'json',
         contentType: 'application/json; charset=utf-8',
         error: function (xhr) {
            alert('Error: ' + xhr.statusText);
         },
         success: function (result) {
            CheckIfInvoiceFound(result);
         },
         async: true,
         processData: false
      });

json parsing error syntax error unexpected end of input

Unexpected end of input means that the parser has ended prematurely. For example, it might be expecting "abcd...wxyz" but only sees "abcd...wxy.

This can be a typo error somewhere, or it could be a problem you get when encodings are mixed across different parts of the application.

One example: consider you are receiving data from a native app using chrome.runtime.sendNativeMessage:

chrome.runtime.sendNativeMessage('appname', {toJSON:()=>{return msg}}, (data)=>{
    console.log(data);
});

Now before your callback is called, the browser would attempt to parse the message using JSON.parse which can give you "unexpected end of input" errors if the supplied byte length does not match the data.

HTML5 Video tag not working in Safari , iPhone and iPad

By using this code video will play in all browser in safari as well with ios devices... Go for it everyone (I have used this and working fine)

`

_x000D_

<video autoplay loop muted playsinline poster="video_thumbnail/thumbanil.jpg" src="video/video.mp4">_x000D_
     <source src="video/video.mp4" type="video/mp4"></source>_x000D_
  <source src="video/video.webm" type="video/webm"></source>_x000D_
  <source src="video/video.mov" type="video/mov"></source>_x000D_
</video>

_x000D_

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

I developed an ultimate solution for image scaling in Swift.

You can use it to resize image to fill, aspect fill or aspect fit specified size.

You can align image to center or any of four edges and four corners.

And also you can trim extra space which is added if aspect ratios of original image and target size are not equal.

enum UIImageAlignment {
    case Center, Left, Top, Right, Bottom, TopLeft, BottomRight, BottomLeft, TopRight
}

enum UIImageScaleMode {
    case Fill,
    AspectFill,
    AspectFit(UIImageAlignment)
}

extension UIImage {
    func scaleImage(width width: CGFloat? = nil, height: CGFloat? = nil, scaleMode: UIImageScaleMode = .AspectFit(.Center), trim: Bool = false) -> UIImage {
        let preWidthScale = width.map { $0 / size.width }
        let preHeightScale = height.map { $0 / size.height }
        var widthScale = preWidthScale ?? preHeightScale ?? 1
        var heightScale = preHeightScale ?? widthScale
        switch scaleMode {
        case .AspectFit(_):
            let scale = min(widthScale, heightScale)
            widthScale = scale
            heightScale = scale
        case .AspectFill:
            let scale = max(widthScale, heightScale)
            widthScale = scale
            heightScale = scale
        default:
            break
        }
        let newWidth = size.width * widthScale
        let newHeight = size.height * heightScale
        let canvasWidth = trim ? newWidth : (width ?? newWidth)
        let canvasHeight = trim ? newHeight : (height ?? newHeight)
        UIGraphicsBeginImageContextWithOptions(CGSizeMake(canvasWidth, canvasHeight), false, 0)

        var originX: CGFloat = 0
        var originY: CGFloat = 0
        switch scaleMode {
        case .AspectFit(let alignment):
            switch alignment {
            case .Center:
                originX = (canvasWidth - newWidth) / 2
                originY = (canvasHeight - newHeight) / 2
            case .Top:
                originX = (canvasWidth - newWidth) / 2
            case .Left:
                originY = (canvasHeight - newHeight) / 2
            case .Bottom:
                originX = (canvasWidth - newWidth) / 2
                originY = canvasHeight - newHeight
            case .Right:
                originX = canvasWidth - newWidth
                originY = (canvasHeight - newHeight) / 2
            case .TopLeft:
                break
            case .TopRight:
                originX = canvasWidth - newWidth
            case .BottomLeft:
                originY = canvasHeight - newHeight
            case .BottomRight:
                originX = canvasWidth - newWidth
                originY = canvasHeight - newHeight
            }
        default:
            break
        }
        self.drawInRect(CGRectMake(originX, originY, newWidth, newHeight))
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image
    }
}

There are examples of applying this solution below.

Gray rectangle is target site image will be resized to. Blue circles in light blue rectangle is the image (I used circles because it's easy to see when it's scaled without preserving aspect). Light orange color marks areas that will be trimmed if you pass trim: true.

Aspect fit before and after scaling:

Another example of aspect fit:

Aspect fit with top alignment:

Aspect fill:

Fill:

I used upscaling in my examples because it's simpler to demonstrate but solution also works for downscaling as in question.

For JPEG compression you should use this :

let compressionQuality: CGFloat = 0.75 // adjust to change JPEG quality
if let data = UIImageJPEGRepresentation(image, compressionQuality) {
  // ...
}

You can check out my gist with Xcode playground.

How to find keys of a hash?

There is function in modern JavaScript (ECMAScript 5) called Object.keys performing this operation:

var obj = { "a" : 1, "b" : 2, "c" : 3};
alert(Object.keys(obj)); // will output ["a", "b", "c"]

Compatibility details can be found here.

On the Mozilla site there is also a snippet for backward compatibility:

if(!Object.keys) Object.keys = function(o){
   if (o !== Object(o))
      throw new TypeError('Object.keys called on non-object');
   var ret=[],p;
   for(p in o) if(Object.prototype.hasOwnProperty.call(o,p)) ret.push(p);
   return ret;
}

Replace characters from a column of a data frame R

If your variable data1$c is a factor, it's more efficient to change the labels of the factor levels than to create a new vector of characters:

levels(data1$c) <- sub("_", "-", levels(data1$c))


            a b   c
1  0.73945260 a A-B
2  0.75998815 b A-B
3  0.19576725 c A-B
4  0.85932140 d A-B
5  0.80717115 e A-C
6  0.09101492 f A-C
7  0.10183586 g A-C
8  0.97742424 h A-C
9  0.21364521 i A-C
10 0.02389782 j A-C

Disable arrow key scrolling in users browser

I've tried different ways of blocking scrolling when the arrow keys are pressed, both jQuery and native Javascript - they all work fine in Firefox, but don't work in recent versions of Chrome.
Even the explicit {passive: false} property for window.addEventListener, which is recommended as the only working solution, for example here.

In the end, after many tries, I found a way that works for me in both Firefox and Chrome:

window.addEventListener('keydown', (e) => {
    if (e.target.localName != 'input') {   // if you need to filter <input> elements
        switch (e.keyCode) {
            case 37: // left
            case 39: // right
                e.preventDefault();
                break;
            case 38: // up
            case 40: // down
                e.preventDefault();
                break;
            default:
                break;
        }
    }
}, {
    capture: true,   // this disables arrow key scrolling in modern Chrome
    passive: false   // this is optional, my code works without it
});

Quote for EventTarget.addEventListener() from MDN

options Optional
   An options object specifies characteristics about the event listener. The available options are:

capture
   A Boolean indicating that events of this type will be dispatched to the registered listener before being dispatched to any EventTarget beneath it in the DOM tree.
once
   ...
passive
   A Boolean that, if true, indicates that the function specified by listener will never call preventDefault(). If a passive listener does call preventDefault(), the user agent will do nothing other than generate a console warning. ...

How do I get into a Docker container's shell?

you can interact with the terminal in docker container by passing the option -ti

docker run --rm -ti <image-name>
eg: docker run --rm -ti ubuntu

-t stands for terminal -i stands for interactive

Simple way to repeat a string

public static String rep(int a,String k)

       {
           if(a<=0)
                return "";
           else 
           {a--;
               return k+rep(a,k);
       }

You can use this recursive method for you desired goal.

AttributeError: 'str' object has no attribute

The problem is in your playerMovement method. You are creating the string name of your room variables (ID1, ID2, ID3):

letsago = "ID" + str(self.dirDesc.values())

However, what you create is just a str. It is not the variable. Plus, I do not think it is doing what you think its doing:

>>>str({'a':1}.values())
'dict_values([1])'

If you REALLY needed to find the variable this way, you could use the eval function:

>>>foo = 'Hello World!'
>>>eval('foo')
'Hello World!'

or the globals function:

class Foo(object):
    def __init__(self):
        super(Foo, self).__init__()
    def test(self, name):
        print(globals()[name])

foo = Foo()
bar = 'Hello World!'
foo.text('bar')

However, instead I would strongly recommend you rethink you class(es). Your userInterface class is essentially a Room. It shouldn't handle player movement. This should be within another class, maybe GameManager or something like that.

How can I include all JavaScript files in a directory via JavaScript file?

@jellyfishtree it would be a better if you create one php file which includes all your js files from the directory and then only include this php file via a script tag. This has a better performance because the browser has to do less requests to the server. See this:

javascripts.php:

<?php
   //sets the content type to javascript 
   header('Content-type: text/javascript');

   // includes all js files of the directory
   foreach(glob("packages/*.js") as $file) {
      readfile($file);
   }
?>

index.php:

<script type="text/javascript" src="javascripts.php"></script>

That's it!
Have fun! :)

C# static class why use?

Making a class static just prevents people from trying to make an instance of it. If all your class has are static members it is a good practice to make the class itself static.

PHP Fatal error: Cannot access empty property

First, don't declare variables using var, but

public $my_value;

Then you can access it using

$this->my_value;

and not

$this->$my_value;

How to replace local branch with remote branch entirely in Git?

The safest and most complete way to replace the current local branch with the remote:

git stash
git merge --abort
git rebase --abort
git branch -M yourBranch replaced_yourBranch
git fetch origin yourBranch:yourBranch
git checkout yourBranch

The stash line saves the changes that you have not committed. The branch line moves your branch to a different name, freeing up the original name. The fetch line retrieves the latest copy of the remote. The checkout line recreates the original branch as a tracking branch.

Or as a bash function:

replaceWithRemote() {
    yourBranch=${1:-`git rev-parse --abbrev-ref HEAD`}
    git stash
    git merge --abort
    git rebase --abort
    git branch -M ${yourBranch} replaced_${yourBranch}_`git rev-parse --short HEAD`
    git fetch origin ${yourBranch}:${yourBranch}
    git checkout ${yourBranch}
}

which renames the current branch to something like replaced_master_98d258f.

How to force 'cp' to overwrite directory instead of creating another one inside?

Try to use this composed of two steps command:

rm -rf bar && cp -r foo bar

How to call a button click event from another method

Usually the better way is to trigger an event (click) instead of calling the method directly.

How do I use a PriorityQueue?

Just to answer the add() vs offer() question (since the other one is perfectly answered imo, and this might not be):

According to JavaDoc on interface Queue, "The offer method inserts an element if possible, otherwise returning false. This differs from the Collection.add method, which can fail to add an element only by throwing an unchecked exception. The offer method is designed for use when failure is a normal, rather than exceptional occurrence, for example, in fixed-capacity (or "bounded") queues."

That means if you can add the element (which should always be the case in a PriorityQueue), they work exactly the same. But if you can't add the element, offer() will give you a nice and pretty false return, while add() throws a nasty unchecked exception that you don't want in your code. If failure to add means code is working as intended and/or it is something you'll check normally, use offer(). If failure to add means something is broken, use add() and handle the resulting exception thrown according to the Collection interface's specifications.

They are both implemented this way to fullfill the contract on the Queue interface that specifies offer() fails by returning a false (method preferred in capacity-restricted queues) and also maintain the contract on the Collection interface that specifies add() always fails by throwing an exception.

Anyway, hope that clarifies at least that part of the question.

Android Studio suddenly cannot resolve symbols

try to change your build.gradle with these value:

android { compileSdkVersion 18 buildToolsVersion '21.0.1'

defaultConfig {
    minSdkVersion 18
    targetSdkVersion 18
}

Make XmlHttpRequest POST using JSON

If you use JSON properly, you can have nested object without any issue :

var xmlhttp = new XMLHttpRequest();   // new HttpRequest instance 
var theUrl = "/json-handler";
xmlhttp.open("POST", theUrl);
xmlhttp.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
xmlhttp.send(JSON.stringify({ "email": "[email protected]", "response": { "name": "Tester" } }));

How to resolve "local edit, incoming delete upon update" message

You can force to revert your local directory to svn.

 svn revert -R your_local_path

How to request a random row in SQL?

Solutions like Jeremies:

SELECT * FROM table ORDER BY RAND() LIMIT 1

work, but they need a sequential scan of all the table (because the random value associated with each row needs to be calculated - so that the smallest one can be determined), which can be quite slow for even medium sized tables. My recommendation would be to use some kind of indexed numeric column (many tables have these as their primary keys), and then write something like:

SELECT * FROM table WHERE num_value >= RAND() * 
    ( SELECT MAX (num_value ) FROM table ) 
ORDER BY num_value LIMIT 1

This works in logarithmic time, regardless of the table size, if num_value is indexed. One caveat: this assumes that num_value is equally distributed in the range 0..MAX(num_value). If your dataset strongly deviates from this assumption, you will get skewed results (some rows will appear more often than others).

Command to list all files in a folder as well as sub-folders in windows

An alternative to the above commands that is a little more bulletproof.

It can list all files irrespective of permissions or path length.

robocopy "C:\YourFolderPath" "C:\NULL" /E /L /NJH /NJS /FP /NS /NC /B /XJ

I have a slight issue with the use of C:\NULL which I have written about in my blog

https://theitronin.com/bulletproofdirectorylisting/

But nevertheless it's the most robust command I know.

How to convert NUM to INT in R?

Use as.integer:

set.seed(1)
x <- runif(5, 0, 100)
x
[1] 26.55087 37.21239 57.28534 90.82078 20.16819


as.integer(x)
[1] 26 37 57 90 20

Test for class:

xx <- as.integer(x)
str(xx)
 int [1:5] 26 37 57 90 20

Version vs build in Xcode

The marketing release number is for the customers, called version number. It starts with 1.0 and goes up for major updates to 2.0, 3.0, for minor updates to 1.1, 1.2 and for bug fixes to 1.0.1, 1.0.2 . This number is oriented about releases and new features.

The build number is mostly the internal number of builds that have been made until then. But some use other numbers like the branch number of the repository. This number should be unique to distinguish the different nearly the same builds.

As you can see, the build number is not necessary and it is up to you which build number you want to use. So if you update your Xcode to a major version, the build field is empty. The version field may not be empty!.

To get the build number as a NSString variable:

NSString * appBuildString = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleVersion"];

To get the version number as a NSString variable:

NSString * appVersionString = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleShortVersionString"];

If you want both in one NSString:

NSString * versionBuildString = [NSString stringWithFormat:@"Version: %@ (%@)", appVersionString, appBuildString];

This is tested with Xcode Version 4.6.3 (4H1503). The build number is often written in parenthesis / braces. The build number is in hexadecimal or decimal.

buildandversion

In Xcode you can auto-increment the build number as a decimal number by placing the following in the Run script build phase in the project settings

#!/bin/bash    
buildNumber=$(/usr/libexec/PlistBuddy -c "Print CFBundleVersion" "$INFOPLIST_FILE")
buildNumber=$(($buildNumber + 1))
/usr/libexec/PlistBuddy -c "Set :CFBundleVersion $buildNumber" "$INFOPLIST_FILE"

For hexadecimal build number use this script

buildNumber=$(/usr/libexec/PlistBuddy -c "Print CFBundleVersion" "$INFOPLIST_FILE")
buildNumber=$((0x$buildNumber)) 
buildNumber=$(($buildNumber + 1)) 
buildNumber=$(printf "%X" $buildNumber)
/usr/libexec/PlistBuddy -c "Set :CFBundleVersion $buildNumber" "$INFOPLIST_FILE"

project_settings

Android: adbd cannot run as root in production builds

The problem is that, even though your phone is rooted, the 'adbd' server on the phone does not use root permissions. You can try to bypass these checks or install a different adbd on your phone or install a custom kernel/distribution that includes a patched adbd.

Or, a much easier solution is to use 'adbd insecure' from chainfire which will patch your adbd on the fly. It's not permanent, so you have to run it before starting up the adb server (or else set it to run every boot). You can get the app from the google play store for a couple bucks:

https://play.google.com/store/apps/details?id=eu.chainfire.adbd&hl=en

Or you can get it for free, the author has posted a free version on xda-developers:

http://forum.xda-developers.com/showthread.php?t=1687590

Install it to your device (copy it to the device and open the apk file with a file manager), run adb insecure on the device, and finally kill the adb server on your computer:

% adb kill-server

And then restart the server and it should already be root.

Writing Unicode text to a text file?

Deal exclusively with unicode objects as much as possible by decoding things to unicode objects when you first get them and encoding them as necessary on the way out.

If your string is actually a unicode object, you'll need to convert it to a unicode-encoded string object before writing it to a file:

foo = u'?, ?, ?, ? ?, ?, ?, ?, ?, and ?.'
f = open('test', 'w')
f.write(foo.encode('utf8'))
f.close()

When you read that file again, you'll get a unicode-encoded string that you can decode to a unicode object:

f = file('test', 'r')
print f.read().decode('utf8')

Printing Lists as Tabular Data

>>> import pandas
>>> pandas.DataFrame(data, teams_list, teams_list)
           Man Utd  Man City  T Hotspur
Man Utd    1        2         1        
Man City   0        1         0        
T Hotspur  2        4         2

DataGridView - Focus a specific cell

 private void dataGridView1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
    {
        int row = e.RowIndex;
        int col = e.ColumnIndex;
        if (row < 0 || col != 3)
            return;
        if (e.FormattedValue.ToString().Equals(String.Empty))
        {
        }

        else
        {
            double quantity = 0;
            try
            {
                quantity = Convert.ToDouble(e.FormattedValue.ToString());
                if (quantity == 0)
                {
                    MessageBox.Show("The quantity can not be Zero", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    e.Cancel = true;
                    return;
                }
            }
            catch
            {
                MessageBox.Show("The quantity should be decimal value.", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
                e.Cancel = true;
                return;
            }
        }
    }

How to sort a list of strings?

The proper way to sort strings is:

import locale
locale.setlocale(locale.LC_ALL, 'en_US.UTF-8') # vary depending on your lang/locale
assert sorted((u'Ab', u'ad', u'aa'), cmp=locale.strcoll) == [u'aa', u'Ab', u'ad']

# Without using locale.strcoll you get:
assert sorted((u'Ab', u'ad', u'aa')) == [u'Ab', u'aa', u'ad']

The previous example of mylist.sort(key=lambda x: x.lower()) will work fine for ASCII-only contexts.

How can I make a UITextField move up when the keyboard is present - on starting to edit?

This question has already a lot of answers, some said to use scroll view, some said to use a third lib.

But for me the idea solution should be UITableViewController with static cells.

You separate your UI to multiple part and put them in the tableViewCells one by one, than your don't need worry about keyboard anymore, tableViewController will manage it for you automatically.

It may be a little difficult to calculate the padding, margin, cell height, but if your math is ok, it's simple.

How to check if $_GET is empty?

Easy.

if (empty($_GET)) {
    // $_GET is empty
}

How to vertically align label and input in Bootstrap 3?

The bootstrap 3 docs for horizontal forms let you use the .form-horizontal class to make your form labels and inputs vertically aligned. The structure for these forms is:

<form class="form-horizontal" role="form">
  <div class="form-group">
    <label for="input1" class="col-lg-2 control-label">Label1</label>
    <div class="col-lg-10">
      <input type="text" class="form-control" id="input1" placeholder="Input1">
    </div>
  </div>
  <div class="form-group">
    <label for="input2" class="col-lg-2 control-label">Label2</label>
    <div class="col-lg-10">
      <input type="password" class="form-control" id="input2" placeholder="Input2">
    </div>
  </div>
</form>

Therefore, your form should look like this:

<form class="form-horizontal" role="form">
    <div class="form-group">
        <div class="col-xs-3">
            <label for="class_type"><h2><span class=" label label-primary">Class Type</span></h2></label>
        </div>
        <div class="col-xs-2">
            <select id="class_type" class="form-control input-lg" autocomplete="off">
                <option>Economy</option>
                <option>Premium Economy</option>
                <option>Club World</option>
                <option>First Class</option>
            </select>
        </div>
    </div>
</form>

How can I copy a conditional formatting from one document to another?

You can also copy a cell which contains the conditional formatting and then select the range (of destination document -or page-) where you want the conditional format to be applied and select "paste special" > "paste only conditional formatting"

How to exit a 'git status' list in a terminal?

I have to guess here, but git is probably running its output into your $PAGER program, likely less or more. In either case, typing q should get you out.

What happened to Lodash _.pluck?

If you really want _.pluck support back, you can use a mixin:

const _ = require("lodash")

_.mixin({
    pluck: _.map
})

Because map now supports a string (the "iterator") as an argument instead of a function.

How to put an image next to each other

Check this out. Just use float and get rid of relative.

http://jsfiddle.net/JhpRk/

#icons{float:left;}

How to insert special characters into a database?

For Example:
$parent_category_name = Men's Clothing
Consider here the SQL query

$sql_category_name = "SELECT c.*, cd.name, cd.category_id  as iid FROM ". DB_PREFIX . "category c LEFT JOIN " . DB_PREFIX . "category_description cd ON (c.category_id = cd.category_id) WHERE cd.name = '" .  $this->db->escape($parent_category_name) . "' AND c.parent_id =0 ";

Error:

Static analysis:

1 errors were found during analysis.

Ending quote ' was expected. (near "" at position 198)
SQL query: Documentation

SELECT c.*, cd.name, cd.category_id as iid FROM oc_category c LEFT JOIN oc_category_description cd ON (c.category_id = cd.category_id) WHERE cd.name = 'Men's Clothing' AND c.parent_id =0 LIMIT 0, 25

MySQL said: Documentation

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 's Clothing' AND c.parent_id =0 LIMIT 0, 25' at line 1

Try to implement:

$this->db->escape($parent_category_name)

The above method works on OpenCart framework. Find your framework & implement OR mysql_real_escape_string() in Core PHP

This will become Men\'s Clothing i.e, In my case

$sql_category_name = "SELECT c.*, cd.name, cd.category_id  as iid FROM ". DB_PREFIX . "category c LEFT JOIN " . DB_PREFIX . "category_description cd ON (c.category_id = cd.category_id) WHERE cd.name = '" .  $this->db->escape($parent_category_name) . "' AND c.parent_id =0 ";

So you'll get the clear picture of the query by implementing escape() as

SELECT c.*, cd.name, cd.category_id as iid FROM oc_category c LEFT JOIN oc_category_description cd ON (c.category_id = cd.category_id) WHERE cd.name = 'Men\'s Clothing' AND c.parent_id =0

Fastest Way of Inserting in Entity Framework

I have made an generic extension of @Slauma s example above;

public static class DataExtensions
{
    public static DbContext AddToContext<T>(this DbContext context, object entity, int count, int commitCount, bool recreateContext, Func<DbContext> contextCreator)
    {
        context.Set(typeof(T)).Add((T)entity);

        if (count % commitCount == 0)
        {
            context.SaveChanges();
            if (recreateContext)
            {
                context.Dispose();
                context = contextCreator.Invoke();
                context.Configuration.AutoDetectChangesEnabled = false;
            }
        }
        return context;
    }
}

Usage:

public void AddEntities(List<YourEntity> entities)
{
    using (var transactionScope = new TransactionScope())
    {
        DbContext context = new YourContext();
        int count = 0;
        foreach (var entity in entities)
        {
            ++count;
            context = context.AddToContext<TenancyNote>(entity, count, 100, true,
                () => new YourContext());
        }
        context.SaveChanges();
        transactionScope.Complete();
    }
}

Unrecognized escape sequence for path string containing backslashes

var foo = @"D:\Projects\Some\Kind\Of\Pathproblem\wuhoo.xml";

how to use font awesome in own css?

you can do so by using the :before or :after pseudo. read more about it here http://astronautweb.co/snippet/font-awesome/

change your code to this

.lb-prev:hover {
  filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=100);
  opacity: 1;
   text-decoration: none;
}

.lb-prev:before {
    font-family: FontAwesome;
    content: "\f053";
    font-size: 30px;
}

do the same for the other icons. you might want to adjust the color and height of the icons too. anyway here is the fiddle hope this helps

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("************");    


        }

}

Rails.env vs RAILS_ENV

Update: in Rails 3.0.9: env method defined in railties/lib/rails.rb

C++ - unable to start correctly (0xc0150002)

It is because there is a DLL that your program is missing or can't find.

In your case I believe you are missing the openCV dlls. You can find these under the "build" directory that comes with open CV. If you are using VS2010 and building to an x86 program you can locate your dlls here under "opencv\build\x86\vc10\bin". Simply copy all these files to your Debug and Release folders and it should resolve your issues.

Generally you can resolve this issue using the following procedure:

Download Dependency Walker from here: http://www.dependencywalker.com/
Load your .exe file into Dependency Walker (under your projects Debug or Release folder), in your case this would be DisplayImage.exe
Look for any DLL's that are missing, or are corrupt, or are for the wrong architecture (i.e. x64 instead of x86) these will be highlighted in red.
For each DLL that you are missing either copy to your Debug or Release folders with your .exe, or install the required software, or add the path to the DLLs to your environment variables (Win+Pause -> Advanced System Settings -> Environment Variables)

Remember that you will need to have these DLLs in the same directory as your .exe. If you copy the .exe from the Release folder to somewhere else then you will need those DLLs copied with the .exe as well. For portability I tend to try and have a test Virtual Machine with a clean install of Windows (no updates or programs installed), and I walk through the Dependencies using the Dependency Walker one by one until the program is running happily.

This is a common problem. Also see these questions:

Can't run a vc++, error code 0xc0150002

The application was unable to start (0xc0150002) with libcurl C++ Windows 7 VS 2010

0xc0150002 Error when trying to run VC++ libcurl

The application was unable to start correctly 0xc150002

The application was unable to start correctly (0*0150002) - OpenCv

Good Luck!

jquery change button color onclick

$('input[type="submit"]').click(function(){
$(this).css('color','red');
});

Use class, Demo:- http://jsfiddle.net/BX6Df/

   $('input[type="submit"]').click(function(){
          $(this).addClass('red');
});

if you want to toggle the color each click, you can try this:- http://jsfiddle.net/SMNks/

$('input[type="submit"]').click(function(){
  $(this).toggleClass('red');
});


.red
{
    background-color:red;
}

Updated answer for your comment.

http://jsfiddle.net/H2Xhw/

$('input[type="submit"]').click(function(){
    $('input[type="submit"].red').removeClass('red')
        $(this).addClass('red');
});

Java String to SHA1

Using Guava Hashing class:

Hashing.sha1().hashString( "password", Charsets.UTF_8 ).toString()

Running windows shell commands with python

import subprocess
result = []
win_cmd = 'ipconfig'(curr_user,filename,ip_address)
process = subprocess.Popen(win_cmd,
shell=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE )
for line in process.stdout:
    print line
result.append(line)
errcode = process.returncode
for line in result:
    print line

How do I get values from a SQL database into textboxes using C#?

The line reader.Read() is missing in your code. You should add it. It is the function which actually reads data from the database:

string conString = "Data Source=localhost;Initial Catalog=LoginScreen;Integrated Security=True";
SqlConnection con = new SqlConnection(conString);

string selectSql = "select * from Pending_Tasks";
SqlCommand com = new SqlCommand(selectSql, con);

try
{
    con.Open();

    using (SqlDataReader read = cmd.ExecuteReader())
    {
        while(reader.Read())
        {
            CustID.Text = (read["Customer_ID"].ToString());
            CustName.Text = (read["Customer_Name"].ToString());
            Add1.Text = (read["Address_1"].ToString());
            Add2.Text = (read["Address_2"].ToString());
            PostBox.Text = (read["Postcode"].ToString());
            PassBox.Text = (read["Password"].ToString());
            DatBox.Text = (read["Data_Important"].ToString());
            LanNumb.Text = (read["Landline"].ToString());
            MobNumber.Text = (read["Mobile"].ToString());
            FaultRep.Text = (read["Fault_Report"].ToString());
        }
    }
}
finally
{
    con.Close();
}

EDIT : This code works supposing you want to write the last record to your textboxes. If you want to apply a different scenario, like for example to read all the records from database and to change data in the texboxes when you click the Next button, you should create and use your own Model, or you can store data in the DataTable and refer to them later if you wish.

How to study design patterns?

I've lead a few design patterns discussion groups (our site) and have read 5 or 6 patterns books. I recommend starting with the Head First Design Patterns book and attending or starting a discussion group. The Head First book might look a little Hasboro at first, but most people like it after reading a chapter or two.

Use the outstanding resource - Joshua Kereivisky's A Learning Guide to Design Patterns for the pattern ordering and to help your discussion group. Out of experience the one change I suggest to the ordering is to put Strategy first. Most of today's developers have experienced some good or bad incarnation of a Factory, so starting with Factory can lead to a lot of conversation and confusion about the pattern.This tends to take focus off how to study and learn patterns which is pretty essential at that first meeting.

What is the difference between ManualResetEvent and AutoResetEvent in .NET?

Yes. This is absolutely correct.

You could see ManualResetEvent as a way to indicate state. Something is on (Set) or off (Reset). An occurrence with some duration. Any thread waiting for that state to happen can proceed.

An AutoResetEvent is more comparable to a signal. A one shot indication that something has happened. An occurrence without any duration. Typically but not necessarily the "something" that has happened is small and needs to be handled by a single thread - hence the automatic reset after a single thread have consumed the event.

Add CSS class to a div in code behind

What if:

 <asp:Button ID="Button1" runat="server" CssClass="test1 test3 test-test" />

To add or remove a class, instead of overwriting all classes with

   BtnventCss.CssClass = "hom_but_a"

keep the HTML correct:

    string classname = "TestClass";

    // Add a class
    BtnventCss.CssClass = String.Join(" ", Button1
               .CssClass
               .Split(' ')
               .Except(new string[]{"",classname})
               .Concat(new string[]{classname})
               .ToArray()
       );

     // Remove a class
     BtnventCss.CssClass = String.Join(" ", Button1
               .CssClass
               .Split(' ')
               .Except(new string[]{"",classname})
               .ToArray()
       );

This assures

The original classnames remain.
There are no double classnames
There are no disturbing extra spaces

Especially when client-side development is using several classnames on one element.

In your example, use

   string classname = "TestClass";

    // Add a class
    Button1.Attributes.Add("class", String.Join(" ", Button1
               .Attributes["class"]
               .Split(' ')
               .Except(new string[]{"",classname})
               .Concat(new string[]{classname})
               .ToArray()
       ));

     // Remove a class
     Button1.Attributes.Add("class", String.Join(" ", Button1
               .Attributes["class"]
               .Split(' ')
               .Except(new string[]{"",classname})
               .ToArray()
       ));

You should wrap this in a method/property ;)

Java 8 Stream API to find Unique Object matching a property value

Guava API provides MoreCollectors.onlyElement() which is a collector that takes a stream containing exactly one element and returns that element.

The returned collector throws an IllegalArgumentException if the stream consists of two or more elements, and a NoSuchElementException if the stream is empty.

Refer the below code for usage:

import static com.google.common.collect.MoreCollectors.onlyElement;

Person matchingPerson = objects.stream
                        .filter(p -> p.email().equals("testemail"))
                        .collect(onlyElement());

iterating quickly through list of tuples

I think that you can use

for j,k in my_list:
  [ ... stuff ... ]

How to use SortedMap interface in Java?

tl;dr

Use either of the Map implementations bundled with Java 6 and later that implement NavigableMap (the successor to SortedMap):

Use TreeMap if running single-threaded, or if the map is to be read-only across threads after first being populated.
Use ConcurrentSkipListMap if manipulating the map across threads.

`NavigableMap`

FYI, the SortedMap interface was succeeded by the NavigableMap interface.

You would only need to use SortedMap if using 3rd-party implementations that have not yet declared their support of NavigableMap. Of the maps bundled with Java, both of the implementations that implement SortedMap also implement NavigableMap.

Interface versus concrete class

s SortedMap the best answer? TreeMap?

As others mentioned, SortedMap is an interface while TreeMap is one of multiple implementations of that interface (and of the more recent NavigableMap.

Having an interface allows you to write code that uses the map without breaking if you later decide to switch between implementations.

NavigableMap< Employee , Project > currentAssignments = new TreeSet<>() ;
currentAssignments.put( alice , writeAdCopyProject ) ; 
currentAssignments.put( bob , setUpNewVendorsProject ) ;

This code still works if later change implementations. Perhaps you later need a map that supports concurrency for use across threads. Change that declaration to:

NavigableMap< Employee , Project > currentAssignments = new ConcurrentSkipListMap<>() ;

…and the rest of your code using that map continues to work.

Choosing implementation

There are ten implementations of Map bundled with Java 11. And more implementations provided by 3rd parties such as Google Guava.

Here is a graphic table I made highlighting the various features of each. Notice that two of the bundled implementations keep the keys in sorted order by examining the key’s content. Also, EnumMap keeps its keys in the order of the objects defined on that enum. Lastly, the LinkedHashMap remembers original insertion order.

How to design RESTful search/filtering?

As I'm using a laravel/php backend I tend to go with something like this:

/resource?filters[status_id]=1&filters[city]=Sydney&page=2&include=relatedResource

PHP automatically turns [] params into an array, so in this example I'll end up with a $filter variable that holds an array/object of filters, along with a page and any related resources I want eager loaded.

If you use another language, this might still be a good convention and you can create a parser to convert [] to an array.

How to bind bootstrap popover on dynamic elements

Update

If your popover is going to have a selector that is consistent then you can make use of selector property of popover constructor.

var popOverSettings = {
    placement: 'bottom',
    container: 'body',
    html: true,
    selector: '[rel="popover"]', //Sepcify the selector here
    content: function () {
        return $('#popover-content').html();
    }
}

$('body').popover(popOverSettings);

Demo

Other ways:

(Standard Way) Bind the popover again to the new items being inserted. Save the popoversettings in an external variable.
Use Mutation Event/Mutation Observer to identify if a particular element has been inserted on to the ul or an element.

Source

var popOverSettings = { //Save the setting for later use as well
    placement: 'bottom',
    container: 'body',
    html: true,
    //content:" <div style='color:red'>This is your div content</div>"
    content: function () {
        return $('#popover-content').html();
    }

}

$('ul').on('DOMNodeInserted', function () { //listed for new items inserted onto ul
    $(event.target).popover(popOverSettings);
});

$("button[rel=popover]").popover(popOverSettings);
$('.pop-Add').click(function () {
    $('ul').append("<li class='project-name'>     <a>project name 2        <button class='pop-function' rel='popover'></button>     </a>   </li>");
});

But it is not recommended to use DOMNodeInserted Mutation Event for performance issues as well as support. This has been deprecated as well. So your best bet would be to save the setting and bind after you update with new element.

Demo

Another recommended way is to use MutationObserver instead of MutationEvent according to MDN, but again support in some browsers are unknown and performance a concern.

MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
// create an observer instance
var observer = new MutationObserver(function (mutations) {
    mutations.forEach(function (mutation) {
        $(mutation.addedNodes).popover(popOverSettings);
    });
});

// configuration of the observer:
var config = {
     attributes: true, 
     childList: true, 
     characterData: true
};

// pass in the target node, as well as the observer options
observer.observe($('ul')[0], config);

Demo

How do I solve the INSTALL_FAILED_DEXOPT error?

I had this error testing on a real device. Clearing cache/uninstalling, restarting everything didn't work for me, deleting the contents of the build folder did :) (Android studio)

Finding the max value of an attribute in an array of objects

if you (or, someone here) are free to use lodash utility library, it has a maxBy function which would be very handy in your case.

hence you can use as such:

_.maxBy(jsonSlice, 'y');

write a shell script to ssh to a remote machine and execute commands

There are multiple remote linux machines, and I need to write a shell script which will execute the same set of commands in each machine. (Including some sudo operations). How can this be done using shell scripting?

You can do this with ssh, for example:

#!/bin/bash
USERNAME=someUser
HOSTS="host1 host2 host3"
SCRIPT="pwd; ls"
for HOSTNAME in ${HOSTS} ; do
    ssh -l ${USERNAME} ${HOSTNAME} "${SCRIPT}"
done

When ssh'ing to the remote machine, how to handle when it prompts for RSA fingerprint authentication.

You can add the StrictHostKeyChecking=no option to ssh:

ssh -o StrictHostKeyChecking=no -l username hostname "pwd; ls"

This will disable the host key check and automatically add the host key to the list of known hosts. If you do not want to have the host added to the known hosts file, add the option -o UserKnownHostsFile=/dev/null.

Note that this disables certain security checks, for example protection against man-in-the-middle attack. It should therefore not be applied in a security sensitive environment.

Capture key press without placing an input element on the page?

jQuery also has an excellent implementation that's incredibly easy to use. Here's how you could implement this functionality across browsers:

$(document).keypress(function(e){
    var checkWebkitandIE=(e.which==26 ? 1 : 0);
    var checkMoz=(e.which==122 && e.ctrlKey ? 1 : 0);

    if (checkWebkitandIE || checkMoz) $("body").append("<p>ctrl+z detected!</p>");
});

Tested in IE7,Firefox 3.6.3 & Chrome 4.1.249.1064

Another way of doing this is to use the keydown event and track the event.keyCode. However, since jQuery normalizes keyCode and charCode using event.which, their spec recommends using event.which in a variety of situations:

$(document).keydown(function(e){
if (e.keyCode==90 && e.ctrlKey)
    $("body").append("<p>ctrl+z detected!</p>");
});

.do extension in web pages?

I've occasionally thought that it might serve a purpose to add a layer of security by obscuring the back-end interpreter through a remapping of .php or whatever to .aspx or whatever so that any potential hacker would be sent down the wrong path, at least for a while. I never bothered to try it and I don't do a lot of webserver work any more so I'm unlikely to.

However, I'd be interested in the perspective of an experienced server admin on that notion.

How to override maven property in command line?

See Introduction to the POM

finalName is created as:

<build>
    <finalName>${project.artifactId}-${project.version}</finalName>
</build>

One of the solutions is to add own property:

<properties>
    <finalName>${project.artifactId}-${project.version}</finalName>
</properties>
<build>
    <finalName>${finalName}</finalName>
 </build>

And now try:

mvn -DfinalName=build clean package

How to Append <script></script> in javascript?

Android requires compiler compliance level 5.0 or 6.0. Found '1.7' instead. Please use Android Tools > Fix Project Properties

As BMSAndroidDroid said, this problem may be caused by a wrong build path configuration.

If you included some libraries to your build path, then move the libraries, the build path will conserve the wrong references, will not found the libraries during compilation and you will get an error.

To fix it, right click on your project folder > build path > configure build path Then take a look to the library tab, and remove the old libraries.

Empty an array in Java / processing

I just want to add something to Mark's comment. If you want to reuse array without additional allocation, just use it again and override existing values with new ones. It will work if you fill the array sequentially. In this case just remember the last initialized element and use array until this index. It is does not matter that there is some garbage in the end of the array.

Facebook Like-Button - hide count?

This is what I've tried and it works fine in ff, chrome and ie8:

/* set width for the <fb:like> tag */

.fb-button {
    width:51px;
}

/* set width for the iframe below, to hide the count label*/

.fb-button iframe{
    width:45px!important;
}

Checking if a number is a prime number in Python

def isPrime(x):
    if x<2:
        return False
    for i in range(2,x):
        if not x%i:
           return False
    return True

print isPrime(2)
True
print isPrime(3)
True
print isPrime(9)
False

Increasing the maximum number of TCP/IP connections in Linux

In an application level, here are something a developer can do:

From server side:

Check if load balancer(if you have),works correctly.
Turn slow TCP timeouts into 503 Fast Immediate response, if you load balancer work correctly, it should pick the working resource to serve, and it's better than hanging there with unexpected error massages.

Eg: If you are using node server, u can use toobusy from npm. Implementation something like:

var toobusy = require('toobusy');
app.use(function(req, res, next) {
  if (toobusy()) res.send(503, "I'm busy right now, sorry.");
  else next();
});

Why 503? Here are some good insights for overload: http://ferd.ca/queues-don-t-fix-overload.html

We can do some work in client side too:

Try to group calls in batch, reduce the traffic and total requests number b/w client and server.
Try to build a cache mid-layer to handle unnecessary duplicates requests.

How can I get the current page's full URL on a Windows/IIS server?

Reverse Proxy Support!

Something a little more robust. Note It'll only work on 5.3 or greater.

/*
 * Compatibility with multiple host headers.
 * Support of "Reverse Proxy" configurations.
 *
 * Michael Jett <[email protected]>
 */

function base_url() {

    $protocol = @$_SERVER['HTTP_X_FORWARDED_PROTO'] 
              ?: @$_SERVER['REQUEST_SCHEME']
              ?: ((isset($_SERVER["HTTPS"]) && $_SERVER["HTTPS"] == "on") ? "https" : "http");

    $port = @intval($_SERVER['HTTP_X_FORWARDED_PORT'])
          ?: @intval($_SERVER["SERVER_PORT"])
          ?: (($protocol === 'https') ? 443 : 80);

    $host = @explode(":", $_SERVER['HTTP_HOST'])[0]
          ?: @$_SERVER['SERVER_NAME']
          ?: @$_SERVER['SERVER_ADDR'];

    // Don't include port if it's 80 or 443 and the protocol matches
    $port = ($protocol === 'https' && $port === 443) || ($protocol === 'http' && $port === 80) ? '' : ':' . $port;

    return sprintf('%s://%s%s/%s', $protocol, $host, $port, @trim(reset(explode("?", $_SERVER['REQUEST_URI'])), '/'));
}

Make a number a percentage

The best solution, where en is the English locale:

fraction.toLocaleString("en", {style: "percent"})

Should I use <i> tag for icons instead of <span>?

I thought this looked pretty bad - because I was working on a Joomla template recently and I kept getting the template failing W3C because it was using the <i> tag and that had deprecated, as it's original use was to italicize something, which is now done through CSS not HTML any more.

It does make really bad practice because when I saw it I went through the template and changed all the <i> tags to <span style="font-style:italic"> instead and then wondered why the entire template looked strange.

This is the main reason it is a bad idea to use the <i> tag in this way - you never know who is going to look at your work afterwards and "assume" that what you were really trying to do is italicize the text rather than display an icon. I've just put some icons in a website and I did it with the following code

<img class="icon" src="electricity.jpg" alt="Electricity" title="Electricity">

that way I've got all my icons in one class so any changes I make affects all the icons (say I wanted them larger or smaller, or rounded borders, etc), the alt text gives screen readers the chance to tell the person what the icon is rather than possibly getting just "text in italics, end of italics" (I don't exactly know how screen readers read screens but I guess it's something like that), and the title also gives the user a chance to mouse over the image and get a tooltip telling them what the icon is in case they can't figure it out. Much better than using <i> - and also it passes W3C standard.

CSS: transition opacity on mouse-out?

$(window).scroll(function() {    
    $('.logo_container, .slogan').css({
        "opacity" : ".1",
        "transition" : "opacity .8s ease-in-out"
    });
});

Check the fiddle: http://jsfiddle.net/2k3hfwo0/2/

File size exceeds configured limit (2560000), code insight features not available

Instructions for changing this settings in latest Jetbrains products

Editing product64.vmoptions didnt worked for me, but editing idea.properties worked ok. Also in order to be able to work with large files you may need to change values for in product64.vmoptions / product.vmoptions for -Xms and -Xmx

libxml/tree.h no such file or directory

For Xcode 6, I had to do the following:

1) add the "libxml2.dylib" library to my project's TARGET (Build Phases -> Link Binary With Libraries)

2) add "$(SDKROOT)/usr/include/libxml2" to the Header Search Paths on the TARGET (Build Settings -> Header Search Paths)

After this, the target should build successfully.

How to view instagram profile picture in full-size?

You can even set the prof. pic size to its high resolution that is '1080x1080'

replace "150x150" with 1080x1080 and remove /vp/ from the link.

How to store arrays in MySQL?

The reason that there are no arrays in SQL, is because most people don't really need it. Relational databases (SQL is exactly that) work using relations, and most of the time, it is best if you assign one row of a table to each "bit of information". For example, where you may think "I'd like a list of stuff here", instead make a new table, linking the row in one table with the row in another table.[1] That way, you can represent M:N relationships. Another advantage is that those links will not clutter the row containing the linked item. And the database can index those rows. Arrays typically aren't indexed.

If you don't need relational databases, you can use e.g. a key-value store.

Read about database normalization, please. The golden rule is "[Every] non-key [attribute] must provide a fact about the key, the whole key, and nothing but the key.". An array does too much. It has multiple facts and it stores the order (which is not related to the relation itself). And the performance is poor (see above).

Imagine that you have a person table and you have a table with phone calls by people. Now you could make each person row have a list of his phone calls. But every person has many other relationships to many other things. Does that mean my person table should contain an array for every single thing he is connected to? No, that is not an attribute of the person itself.

[1]: It is okay if the linking table only has two columns (the primary keys from each table)! If the relationship itself has additional attributes though, they should be represented in this table as columns.

submit form on click event using jquery

it's because the name of the submit button is named "submit", change it to anything but "submit", try "submitme" and retry it. It should then work.

Set size on background image with CSS?

Only CSS 3 supports that,

background-size: 200px 50px;

But I would edit the image itself, so that the user needs to load less, and it might look better than a shrunken image without antialiasing.

What is the difference between origin and upstream on GitHub?

after cloning a fork you have to explicitly add a remote upstream, with git add remote "the original repo you forked from". This becomes your upstream, you mostly fetch and merge from your upstream. Any other business such as pushing from your local to upstream should be done using pull request.

ValueError: all the input arrays must have same number of dimensions

(n,) and (n,1) are not the same shape. Try casting the vector to an array by using the [:, None] notation:

n_lists = np.append(n_list_converted, n_last[:, None], axis=1)

Alternatively, when extracting n_last you can use

n_last = n_list_converted[:, -1:]

to get a (20, 1) array.

How to fix "containing working copy admin area is missing" in SVN?

A common task I experienced was having to take one repo directory in staging and copy it to another repo - both under SVN and both called the same name. The way that worked for me was the following:

svn --force delete PROBLEMATIC-DIR
svn export "https://OLD REPO-A/ new-repo-A"
svn add new-repo-A
svn commit new-repo-A

How to parse JSON array in jQuery?

Do NOT eval. use a real parser, i.e., from json.org

How to round up integer division and have int result in Java?

Expanding on Peter's solution, this is what I've found works for me to always round 'towards positive infinity':

public static long divideAndRoundUp(long num, long divisor) {
    if (num == 0 || divisor == 0) { return 0; }

    int sign = (num > 0 ? 1 : -1) * (divisor > 0 ? 1 : -1);

    if (sign > 0) {
        return (num + divisor - 1) / divisor;
    }
    else {
        return (num / divisor);
    }
}

MySQL with Node.js

node-mysql is probably one of the best modules out there used for working with MySQL database which is actively maintained and well documented.

Return empty cell from formula in Excel

If you are using lookup functions like HLOOKUP and VLOOKUP to bring the data into your worksheet place the function inside brackets and the function will return an empty cell instead of a {0}. For Example,

This will return a zero value if lookup cell is empty:

    =HLOOKUP("Lookup Value",Array,ROW,FALSE)

This will return an empty cell if lookup cell is empty:

    =(HLOOKUP("Lookup Value",Array,ROW,FALSE))

I don't know if this works with other functions...I haven't tried. I am using Excel 2007 to achieve this.

Edit

To actually get an IF(A1="", , ) to come back as true there needs to be two lookups in the same cell seperated by an &. The easy way around this is to make the second lookup a cell that is at the end of the row and will always be empty.

Saving response from Requests to file

As Peter already pointed out:

In [1]: import requests

In [2]: r = requests.get('https://api.github.com/events')

In [3]: type(r)
Out[3]: requests.models.Response

In [4]: type(r.content)
Out[4]: str

You may also want to check r.text.

Also: https://2.python-requests.org/en/latest/user/quickstart/

Pod install is staying on "Setting up CocoaPods Master repo"

Just setup the master repo, was excited to see that we have a download progress, see screenshot ;)

CocoaPods release 1.2.0 (Jan 28) fixes this issue, thanks to all contributors and Danielle Tomlinson for this release.

XPath test if node value is number

You could always use something like this:

string(//Sesscode) castable as xs:decimal

castable is documented by W3C here.

Deep copy in ES6 using the spread syntax

// use: clone( <thing to copy> ) returns <new copy>
// untested use at own risk
function clone(o, m){
  // return non object values
  if('object' !==typeof o) return o
  // m: a map of old refs to new object refs to stop recursion
  if('object' !==typeof m || null ===m) m =new WeakMap()
  var n =m.get(o)
  if('undefined' !==typeof n) return n
  // shallow/leaf clone object
  var c =Object.getPrototypeOf(o).constructor
  // TODO: specialize copies for expected built in types i.e. Date etc
  switch(c) {
    // shouldn't be copied, keep reference
    case Boolean:
    case Error:
    case Function:
    case Number:
    case Promise:
    case String:
    case Symbol:
    case WeakMap:
    case WeakSet:
      n =o
      break;
    // array like/collection objects
    case Array:
      m.set(o, n =o.slice(0))
      // recursive copy for child objects
      n.forEach(function(v,i){
        if('object' ===typeof v) n[i] =clone(v, m)
      });
      break;
    case ArrayBuffer:
      m.set(o, n =o.slice(0))
      break;
    case DataView:
      m.set(o, n =new (c)(clone(o.buffer, m), o.byteOffset, o.byteLength))
      break;
    case Map:
    case Set:
      m.set(o, n =new (c)(clone(Array.from(o.entries()), m)))
      break;
    case Int8Array:
    case Uint8Array:
    case Uint8ClampedArray:
    case Int16Array:
    case Uint16Array:
    case Int32Array:
    case Uint32Array:
    case Float32Array:
    case Float64Array:
      m.set(o, n =new (c)(clone(o.buffer, m), o.byteOffset, o.length))
      break;
    // use built in copy constructor
    case Date:
    case RegExp:
      m.set(o, n =new (c)(o))
      break;
    // fallback generic object copy
    default:
      m.set(o, n =Object.assign(new (c)(), o))
      // recursive copy for child objects
      for(c in n) if('object' ===typeof n[c]) n[c] =clone(n[c], m)
  }
  return n
}

Split string in Lua?

Depending on the use case, this could be useful. It cuts all text either side of the flags:

b = "This is a string used for testing"

--Removes unwanted text
c = (b:match("a([^/]+)used"))

print (c)

Output:

string

How to dynamically update labels captions in VBA form?

Use Controls object

For i = 1 To X
    Controls("Label" & i).Caption =  MySheet.Cells(i + 1, i).Value
Next

Calculating bits required to store decimal number

The formula for the number of binary bits required to store n integers (for example, 0 to n - 1) is:

log_e(n) / log_e(2)

and round up.

For example, for values -128 to 127 (signed byte) or 0 to 255 (unsigned byte), the number of integers is 256, so n is 256, giving 8 from the above formula.

For 0 to n, use n + 1 in the above formula (there are n + 1 integers).

On your calculator, log_e may just be labelled log or ln (natural logarithm).

Button background as transparent

I used

btn.setBackgroundColor(Color.TRANSPARENT);

and

android:background="@android:color/transparent"

How to add /usr/local/bin in $PATH on Mac

I've had the same problem with you.

cd to ../etc/ then use ls to make sure your "paths" file is in , vim paths, add "/usr/local/bin" at the end of the file.

SQL query to find Nth highest salary from a salary table

If you want to get all the records of the employees who has third highest salary then you can use this sql query:

Table name: salary

select * from salary where salary = 
(select distinct salary from salary order by salary desc limit 2,1)

How do I capture SIGINT in Python?

And as a context manager:

import signal

class GracefulInterruptHandler(object):

    def __init__(self, sig=signal.SIGINT):
        self.sig = sig

    def __enter__(self):

        self.interrupted = False
        self.released = False

        self.original_handler = signal.getsignal(self.sig)

        def handler(signum, frame):
            self.release()
            self.interrupted = True

        signal.signal(self.sig, handler)

        return self

    def __exit__(self, type, value, tb):
        self.release()

    def release(self):

        if self.released:
            return False

        signal.signal(self.sig, self.original_handler)

        self.released = True

        return True

To use:

with GracefulInterruptHandler() as h:
    for i in xrange(1000):
        print "..."
        time.sleep(1)
        if h.interrupted:
            print "interrupted!"
            time.sleep(2)
            break

Nested handlers:

with GracefulInterruptHandler() as h1:
    while True:
        print "(1)..."
        time.sleep(1)
        with GracefulInterruptHandler() as h2:
            while True:
                print "\t(2)..."
                time.sleep(1)
                if h2.interrupted:
                    print "\t(2) interrupted!"
                    time.sleep(2)
                    break
        if h1.interrupted:
            print "(1) interrupted!"
            time.sleep(2)
            break

From here: https://gist.github.com/2907502

Update rows in one table with data from another table based on one column in each being equal

It's not an insert if the record already exists in t1 (the user_id matches) unless you are happy to create duplicate user_id's.

You might want an update?

UPDATE t1
   SET <t1.col_list> = (SELECT <t2.col_list>
                          FROM t2
                         WHERE t2.user_id = t1.user_id)
 WHERE EXISTS
      (SELECT 1
         FROM t2
        WHERE t1.user_id = t2.user_id);

Hope it helps...

How to run (not only install) an android application using .apk file?

if you're looking for the equivalent of "adb run myapp.apk"

you can use the script shown in this answer

(linux and mac only - maybe with cygwin on windows)

linux/mac users can also create a script to run an apk with something like the following:

create a file named "adb-run.sh" with these 3 lines:

pkg=$(aapt dump badging $1|awk -F" " '/package/ {print $2}'|awk -F"'" '/name=/ {print $2}')
act=$(aapt dump badging $1|awk -F" " '/launchable-activity/ {print $2}'|awk -F"'" '/name=/ {print $2}')
adb shell am start -n $pkg/$act

then "chmod +x adb-run.sh" to make it executable.

now you can simply:

adb-run.sh myapp.apk

The benefit here is that you don't need to know the package name or launchable activity name. Similarly, you can create "adb-uninstall.sh myapp.apk"

Note: This requires that you have aapt in your path. You can find it under the new build tools folder in the SDK

Is " " a replacement of " "?

Those do both mean non-breaking space, yes.   is another synonym, in hex.

Undefined reference to pthread_create in Linux

in eclipse

properties->c/c++Build->setting->GCC C++ linker->libraries in top part add "pthread"

right click context menu for datagridview

Put a context menu on your form, name it, set captions etc. using the built-in editor
Link it to your grid using the grid property ContextMenuStrip
For your grid, create an event to handle CellContextMenuStripNeeded
The Event Args e has useful properties e.ColumnIndex, e.RowIndex.

I believe that e.RowIndex is what you are asking for.

Suggestion: when user causes your event CellContextMenuStripNeeded to fire, use e.RowIndex to get data from your grid, such as the ID. Store the ID as the menu event's tag item.

Now, when user actually clicks your menu item, use the Sender property to fetch the tag. Use the tag, containing your ID, to perform the action you need.

Can I set subject/content of email using mailto:?

If you want to add html content to your email, url encode your html code for the message body and include it in your mailto link code, but trouble is you can't set the type of the email from this link from plaintext to html, the client using the link needs their mail client to send html emails by default. In case you want to test here is the code for a simple mailto link, with an image wrapped in a link (angular style urls added for visibility):

<a href="mailto:?body=%3Ca%20href%3D%22{{ scope.url }}%22%3E%3Cimg%20src%3D%22{{ scope.url }}%22%20width%3D%22300%22%20%2F%3E%3C%2Fa%3E">

The html tags are url encoded.

css overflow - only 1 line of text

I had the same issue and I solved it by using:

display: inline-block;

on the div in question.

How do I open workbook programmatically as read-only?

Does this work?

Workbooks.Open Filename:=filepath, ReadOnly:=True

Or, as pointed out in a comment, to keep a reference to the opened workbook:

Dim book As Workbook
Set book = Workbooks.Open(Filename:=filepath, ReadOnly:=True)

VBA Copy Sheet to End of Workbook (with Hidden Worksheets)

If you use the following code based on @Siddharth Rout's code, you rename the just copied sheet, no matter, if it is activated or not.

Sub Sample()

    ThisWorkbook.Sheets(1).Copy After:=Sheets(Sheets.Count)
    ThisWorkbook.Sheets(Sheets.Count).Name = "copied sheet!"

End Sub

Set margins in a LinearLayout programmatically

/*
 * invalid margin
 */
private void invalidMarginBottom() {
    RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams) frameLayoutContent.getLayoutParams();
    lp.setMargins(0, 0, 0, 0);
    frameLayoutContent.setLayoutParams(lp);
}

you should be ware of the type of the view's viewGroup.In the code above, for example,I want to change the frameLayout's margin,and the frameLayout's view group is a RelativeLayout,so you need to covert to (RelativeLayout.LayoutParams)

Android Studio doesn't see device

In my case There was multiple instance of adb got created. Unplug device from system. Open Task Monitor (Activity Monitor) and check for adb instances. Kill all adb processes. Try to connect device again. It might work.

Delete all duplicate rows Excel vba

There's a RemoveDuplicates method that you could use:

Sub DeleteRows()

    With ActiveSheet
        Set Rng = Range("A1", Range("B1").End(xlDown))
        Rng.RemoveDuplicates Columns:=Array(1, 2), Header:=xlYes
    End With

End Sub

How do I show my global Git configuration?

The shortest,

git config -l

shows all inherited values from: system, global and local

'No JUnit tests found' in Eclipse

Right Click on Project > Properties > Java Build Path > Add the Test folder as source folder.

All source folders including Test Classes need to be in Eclipse Java Build Path. So that the sources such as main and test classes can be compiled into the build directory (Eclipse default folder is bin).

Maintaining Session through Angular.js

Because the answer is no longer valid with a more stable version of angular, I am posting a newer solution.

PHP Page: session.php

if (!isset($_SESSION))
{    
    session_start();
}    

$_SESSION['variable'] = "hello world";

$sessions = array();

$sessions['variable'] = $_SESSION['variable'];

header('Content-Type: application/json');
echo json_encode($sessions);

Send back only the session variables you want in Angular not all of them don't want to expose more than what is needed.

JS All Together

var app = angular.module('StarterApp', []);
app.controller("AppCtrl", ['$rootScope', 'Session', function($rootScope, Session) {      
    Session.then(function(response){
        $rootScope.session = response;
    });
}]);

 app.factory('Session', function($http) {    
    return $http.get('/session.php').then(function(result) {       
        return result.data; 
    });
});

Do a simple get to get sessions using a factory.
If you want to make it post to make the page not visible when you just go to it in the browser you can, I'm just simplifying it
Add the factory to the controller
I use rootScope because it is a session variable that I use throughout all my code.

HTML

Inside your html you can reference your session

<html ng-app="StarterApp">

<body ng-controller="AppCtrl">
{{ session.variable }}
</body>

Eclipse "this compilation unit is not on the build path of a java project"

You may want to try running eclipse with the -clean startup option - it tries re-building eclipse's metadata of the workspace.

Copying data from one SQLite database to another

If you use DB Browser for SQLite, you can copy the table from one db to another in following steps:

Open two instances of the app and load the source db and target db side by side.
If the target db does not have the table, "Copy Create Statement" from the source db and then paste the sql statement in "Execute SQL" tab and run the sql to create the table.
In the source db, export the table as a CSV file.
In the target db, import the CSV file to the table with the same table name. The app will ask you do you want to import the data to the existing table, click yes. Done.

Java Array Sort descending?

When an array is a type of Integer class then you can use below:

Integer[] arr = {7, 10, 4, 3, 20, 15};
Arrays.sort(arr, Collections.reverseOrder());

When an array is a type of int data type then you can use below:

int[] arr = {7, 10, 4, 3, 20, 15};
int[] reverseArr = IntStream.rangeClosed(1, arr.length).map(i -> arr[arr.length-i]).toArray();

Bootstrap button - remove outline on Chrome OS X

For any googlers like me, where..

.btn:focus {
    outline: none;
}

still didn't work in Google Chrome, the following should completely remove any button glow.

.btn:focus,.btn:active:focus,.btn.active:focus,
.btn.focus,.btn:active.focus,.btn.active.focus {
    outline: none;
}

What are all the uses of an underscore in Scala?

The ones I can think of are

Existential types

def foo(l: List[Option[_]]) = ...

Higher kinded type parameters

case class A[K[_],T](a: K[T])

Ignored variables

val _ = 5

Ignored parameters

List(1, 2, 3) foreach { _ => println("Hi") }

Ignored names of self types

trait MySeq { _: Seq[_] => }

Wildcard patterns

Some(5) match { case Some(_) => println("Yes") }

Wildcard patterns in interpolations

"abc" match { case s"a$_c" => }

Sequence wildcard in patterns

C(1, 2, 3) match { case C(vs @ _*) => vs.foreach(f(_)) }

Wildcard imports

import java.util._

Hiding imports

import java.util.{ArrayList => _, _}

Joining letters to operators

def bang_!(x: Int) = 5

Assignment operators

def foo_=(x: Int) { ... }

Placeholder syntax

List(1, 2, 3) map (_ + 2)

Method values

List(1, 2, 3) foreach println _

Converting call-by-name parameters to functions

def toFunction(callByName: => Int): () => Int = callByName _

Default initializer

var x: String = _   // unloved syntax may be eliminated

There may be others I have forgotten!

Example showing why foo(_) and foo _ are different:

This example comes from 0__:

trait PlaceholderExample {
  def process[A](f: A => Unit)

  val set: Set[_ => Unit]

  set.foreach(process _) // Error 
  set.foreach(process(_)) // No Error
}

In the first case, process _ represents a method; Scala takes the polymorphic method and attempts to make it monomorphic by filling in the type parameter, but realizes that there is no type that can be filled in for A that will give the type (_ => Unit) => ? (Existential _ is not a type).

In the second case, process(_) is a lambda; when writing a lambda with no explicit argument type, Scala infers the type from the argument that foreach expects, and _ => Unit is a type (whereas just plain _ isn't), so it can be substituted and inferred.

This may well be the trickiest gotcha in Scala I have ever encountered.

Note that this example compiles in 2.13. Ignore it like it was assigned to underscore.

Change DIV content using ajax, php and jQuery

jQuery.load()

$('#summary').load('ajax.php', function() {
  alert('Loaded.');
});

Resizing an Image without losing any quality

Unless you're doing vector graphics, there's no way to resize an image without potentially losing some image quality.

invalid use of non-static data member

You try to access private member of one class from another. The fact that bar-class is declared within foo-class means that bar in visible only inside foo class, but that is still other class.

And what is p->param?

Actually, it isn't clear what do you want to do

How to read a text file from server using JavaScript?

Loading that giant blob of data is not a great plan, but if you must, here's the outline of how you might do it using jQuery's $.ajax() function.

<html><head>
<script src="jquery.js"></script>
<script>
getTxt = function (){

  $.ajax({
    url:'text.txt',
    success: function (data){
      //parse your data here
      //you can split into lines using data.split('\n') 
      //an use regex functions to effectively parse it
    }
  });
}
</script>
</head><body>
  <button type="button" id="btnGetTxt" onclick="getTxt()">Get Text</button>
</body></html>

Difference between <context:annotation-config> and <context:component-scan>

<context:annotation-config/> <!-- is used to activate the annotation for beans -->
<context:component-scan base-package="x.y.MyClass" /> <!-- is for the Spring IOC container to look for the beans in the base package. -->

The other important point to note is that context:component-scan implicitly calls the context:annotation-config to activate the annotations on beans. Well if you don't want context:component-scan to implicitly activate annotations for you, you can go on setting the annotation-config element of the context:component-scan to false.

To summarize:

<context:annotation-config/> <!-- activates the annotations --> 
<context:component-scan base-package="x.y.MyClass" /> <!-- activates the annotations + register the beans by looking inside the base-package -->

Add more than one parameter in Twig path

You can pass as many arguments as you want, separating them by commas:

{{ path('_files_manage', {project: project.id, user: user.id}) }}

setting request headers in selenium

Had the same issue today, except that I needed to set different referer per test. I ended up using a middleware and a class to pass headers to it. Thought I'd share (or maybe there's a cleaner solution?):

lib/request_headers.rb:

class CustomHeadersHelper
  cattr_accessor :headers
end

class RequestHeaders
  def initialize(app, helper = nil)
    @app, @helper = app, helper
  end

  def call(env)
    if @helper
      headers = @helper.headers

      if headers.is_a?(Hash)
        headers.each do |k,v|
          env["HTTP_#{k.upcase.gsub("-", "_")}"] = v
        end
      end
    end

    @app.call(env)
  end
end

config/initializers/middleware.rb

require 'request_headers'

if %w(test cucumber).include?(Rails.env)
  Rails.application.config.middleware.insert_before Rack::Lock, "RequestHeaders", CustomHeadersHelper
end

spec/support/capybara_headers.rb

require 'request_headers'

module CapybaraHeaderHelpers
  shared_context "navigating within the site" do
    before(:each) { add_headers("Referer" => Capybara.app_host + "/") }
  end

  def add_headers(custom_headers)
    if Capybara.current_driver == :rack_test
      custom_headers.each do |name, value|
        page.driver.browser.header(name, value)
      end
    else
      CustomHeadersHelper.headers = custom_headers
    end
  end
end

spec/spec_helper.rb

...
config.include CapybaraHeaderHelpers

Then I can include the shared context wherever I need, or pass different headers in another before block. I haven't tested it with anything other than Selenium and RackTest, but it should be transparent, as header injection is done before the request actually hits the application.

Making heatmap from pandas DataFrame

You want matplotlib.pcolor:

import numpy as np 
from pandas import DataFrame
import matplotlib.pyplot as plt

index = ['aaa', 'bbb', 'ccc', 'ddd', 'eee']
columns = ['A', 'B', 'C', 'D']
df = DataFrame(abs(np.random.randn(5, 4)), index=index, columns=columns)

plt.pcolor(df)
plt.yticks(np.arange(0.5, len(df.index), 1), df.index)
plt.xticks(np.arange(0.5, len(df.columns), 1), df.columns)
plt.show()

This gives:

Searching for Text within Oracle Stored Procedures

 SELECT * FROM ALL_source WHERE UPPER(text) LIKE '%BLAH%'

EDIT Adding additional info:

 SELECT * FROM DBA_source WHERE UPPER(text) LIKE '%BLAH%'

The difference is dba_source will have the text of all stored objects. All_source will have the text of all stored objects accessible by the user performing the query. Oracle Database Reference 11g Release 2 (11.2)

Another difference is that you may not have access to dba_source.

How to install a specific version of a package with pip?

Use ==:

pip install django_modeltranslation==0.4.0-beta2

How to show an empty view with a RecyclerView?

One more way is to use addOnChildAttachStateChangeListener which handles appearing/disappearing child views in RecyclerView.

recyclerView.addOnChildAttachStateChangeListener(new RecyclerView.OnChildAttachStateChangeListener() {
            @Override
            public void onChildViewAttachedToWindow(@NonNull View view) {
                forEmptyTextView.setVisibility(View.INVISIBLE);
            }

            @Override
            public void onChildViewDetachedFromWindow(@NonNull View view) {
                forEmptyTextView.setVisibility(View.VISIBLE);
            }
        });

SQL query for extracting year from a date

SELECT date_column_name FROM table_name WHERE EXTRACT(YEAR FROM date_column_name) = 2020

Access cell value of datatable

If you need a weak reference to the cell value:

object field = d.Rows[0][3]

object field = d.Rows[0].ItemArray[3]

Should do it

If you need a strongly typed reference (string in your case) you can use the DataRowExtensions.Field extension method:

string field = d.Rows[0].Field<string>(3);

(make sure System.Data is in listed in the namespaces in this case)

Indexes are 0 based so we first access the first row (0) and then the 4th column in this row (3)

Javascript ajax call on page onload

This is really easy using a JavaScript library, e.g. using jQuery you could write:

$(document).ready(function(){
$.ajax({ url: "database/update.html",
        context: document.body,
        success: function(){
           alert("done");
        }});
});

Without jQuery, the simplest version might be as follows, but it does not account for browser differences or error handling:

<html>
  <body onload="updateDB();">
  </body>
  <script language="javascript">
    function updateDB() {
      var xhr = new XMLHttpRequest();
      xhr.open("POST", "database/update.html", true);
      xhr.send(null);
      /* ignore result */
    }
  </script>
</html>

Optimal way to Read an Excel file (.xls/.xlsx)

Try to use Aspose.cells library (not free, but trial is enough to read), it is quite good

Install-package Aspose.cells

There is sample code:

using Aspose.Cells;
using System;

namespace ExcelReader
{
    class Program
    {
        static void Main(string[] args)
        {
            // Replace path for your file
            readXLS(@"C:\MyExcelFile.xls"); // or "*.xlsx"
            Console.ReadKey();
        }

        public static void readXLS(string PathToMyExcel)
        {
            //Open your template file.
            Workbook wb = new Workbook(PathToMyExcel);

            //Get the first worksheet.
            Worksheet worksheet = wb.Worksheets[0];

            //Get cells
            Cells cells = worksheet.Cells;

            // Get row and column count
            int rowCount = cells.MaxDataRow;
            int columnCount = cells.MaxDataColumn;

            // Current cell value
            string strCell = "";

            Console.WriteLine(String.Format("rowCount={0}, columnCount={1}", rowCount, columnCount));

            for (int row = 0; row <= rowCount; row++) // Numeration starts from 0 to MaxDataRow
            {
                for (int column = 0; column <= columnCount; column++)  // Numeration starts from 0 to MaxDataColumn
                {
                    strCell = "";
                    strCell = Convert.ToString(cells[row, column].Value);
                    if (String.IsNullOrEmpty(strCell))
                    {
                        continue;
                    }
                    else
                    {
                        // Do your staff here
                        Console.WriteLine(strCell);
                    }
                }
            }
        }
    }
}

Why do people say that Ruby is slow?

First of all, do you care about what others say about the language you like? When it does the job it has to do, you're fine.

OO isn't the fastest way to execute code, but it does help in creating the code. Smart code is always faster than dumb code and useless loops. I'm an DBA and see a lot of these useless loops, drop them, use better code and queries and application is faster, much faster. Do you care about the last microsecond? You might have languages optimized for speed, others just do the job they have to do and can be maintained by many different programmers.

It's all just a choice.

When to create variables (memory management)

In your example number is a primitive, so will be stored as a value.

If you want to use a reference then you should use one of the wrapper types (e.g. Integer)

Custom checkbox image android

Checkboxes being children of Button you can just give your checkbox a background image with several states as described here, under "Button style":

...and exemplified here:

Import an Excel worksheet into Access using VBA

Pass the sheet name with the Range parameter of the DoCmd.TransferSpreadsheet Method. See the box titled "Worksheets in the Range Parameter" near the bottom of that page.

This code imports from a sheet named "temp" in a workbook named "temp.xls", and stores the data in a table named "tblFromExcel".

Dim strXls As String
strXls = CurrentProject.Path & Chr(92) & "temp.xls"
DoCmd.TransferSpreadsheet acImport, , "tblFromExcel", _
    strXls, True, "temp!"

Send POST data on redirect with JavaScript/jQuery?

per @Kevin-Reid's answer, here's an alternative to the "I ended up doing the following" example that avoids needing to name and then lookup the form object again by constructing the form specifically (using jQuery)..

var url = 'http://example.com/vote/' + Username;
var form = $('<form action="' + url + '" method="post">' +
  '<input type="text" name="api_url" value="' + Return_URL + '" />' +
  '</form>');
$('body').append(form);
form.submit();

Select last N rows from MySQL

SELECT * FROM table ORDER BY id DESC LIMIT 50

save resources make one query, there is no need to make nested queries

How do I copy a folder from remote to local using scp?

To copy all from Local Location to Remote Location (Upload)

scp -r /path/from/destination username@hostname:/path/to/destination

To copy all from Remote Location to Local Location (Download)

scp -r username@hostname:/path/from/destination /path/to/destination

Custom Port where xxxx is custom port number

 scp -r -P xxxx username@hostname:/path/from/destination /path/to/destination

Copy on current directory from Remote to Local

scp -r username@hostname:/path/from/file .

Help:

-r Recursively copy all directories and files
Always use full location from /, Get full location by pwd
scp will replace all existing files
hostname will be hostname or IP address
if custom port is needed (besides port 22) use -P portnumber
. (dot) - it means current working directory, So download/copy from server and paste here only.

Note: Sometimes the custom port will not work due to the port not being allowed in the firewall, so make sure that custom port is allowed in the firewall for incoming and outgoing connection

How to get the selected radio button value using js

Maybe I'm missing something here, but wouldn't the good old standard JS work? I mean:

var selectedOption = document.getElementById('your-form-name')['radio-group-name'].value;

... which is only valid of course if have provided "value" for your radio input elements.

<input type="radio" name="radio-group-name" value="red" checked>
<input type="radio" name="radio-group-name" value="blue">

The value should be either 'red' or 'blue' in the above example.

What is log4j's default log file dumping path

You can see the log info in the console view of your IDE if you are not using any log4j properties to generate log file. You can define log4j.properties in your project so that those properties would be used to generate log file. A quick sample is listed below.

# Global logging configuration
log4j.rootLogger=DEBUG, stdout, R

# SQL Map logging configuration...
log4j.logger.com.ibatis=INFO
log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=INFO
log4j.logger.com.ibatis.common.jdbc.ScriptRunner=INFO
log4j.logger.com.ibatis.SQLMap.engine.impl.SQL MapClientDelegate=INFO

log4j.logger.java.sql.Connection=INFO
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG
log4j.logger.java.sql.ResultSet=INFO

log4j.logger.org.apache.http=ERROR

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

# Pattern to output the caller's file name and line number.
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n

log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=MyLog.log
log4j.appender.R.MaxFileSize=50000KB
log4j.appender.R.Encoding=UTF-8

# Keep one backup file
log4j.appender.R.MaxBackupIndex=1

log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d %5p [%t] (%F\:%L) - %m%n

When do Java generics require <? extends T> instead of <T> and is there any downside of switching?

One way for me to understand wildcards is to think that the wildcard isn't specifying the type of the possible objects that given generic reference can "have", but the type of other generic references that it is is compatible with (this may sound confusing...) As such, the first answer is very misleading in it's wording.

In other words, List<? extends Serializable> means you can assign that reference to other Lists where the type is some unknown type which is or a subclass of Serializable. DO NOT think of it in terms of A SINGLE LIST being able to hold subclasses of Serializable (because that is incorrect semantics and leads to a misunderstanding of Generics).

How do I generate a stream from a string?

public Stream GenerateStreamFromString(string s)
{
    return new MemoryStream(Encoding.UTF8.GetBytes(s));
}

How to check if BigDecimal variable == 0 in java?

Alternatively, I think it is worth mentioning that the behavior of equals and compareTo methods in the class BigDecimal are not consistent with each other.

This basically means that:

BigDecimal someValue = new BigDecimal("0.00");
System.out.println(someValue.compareTo(BigDecimal.ZERO) == 0); // true
System.out.println(someValue.equals(BigDecimal.ZERO)); // false

Therefore, you have to be very careful with the scale in your someValue variable, otherwise you would get unexpected result.

Node.js vs .Net performance

Standardize data columns in R

Again, even though this is an old question, it is very relevant! And I have found a simple way to normalise certain columns without the need of any packages:

normFunc <- function(x){(x-mean(x, na.rm = T))/sd(x, na.rm = T)}

For example

x<-rnorm(10,14,2)
y<-rnorm(10,7,3)
z<-rnorm(10,18,5)
df<-data.frame(x,y,z)

df[2:3] <- apply(df[2:3], 2, normFunc)

You will see that the y and z columns have been normalised. No packages needed :-)

How to find the privileges and roles granted to a user in Oracle?

select * 
from ROLE_TAB_PRIVS 
where role in (
    select granted_role
    from dba_role_privs 
    where granted_role in ('ROLE1','ROLE2')
)

Python No JSON object could be decoded

It seems that you have invalid JSON. In that case, that's totally dependent on the data the server sends you which you have not shown. I would suggest running the response through a JSON validator.

How to getText on an input in protractor

I had this issue I tried Jmr's solution however it didn't work for me. As all input fields have ng-model attributes I could pull the the attribute and evaluate it and get the value.

HTML

<input ng-model="qty" type="number">

Protractor

var qty = element( by.model('qty') );
qty.sendKeys('10');
qty.evaluate(qty.getAttribute('ng-model')) //-> 10

PHP Date Format to Month Name and Year

if you want same string output then try below else use without double quotes for proper output

$str = '20130814';
  echo date('"F Y"', strtotime($str));

//output  : "August 2013"

How does one make random number between range for arc4random_uniform()?

Quite a few good answers, but I just wanted to share my personal favourite Swift random number generation function for positive integers:

Swift 2

func randomNumber(range: Range<Int> = 1...6) -> Int {
    let min = range.startIndex
    let max = range.endIndex
    return Int(arc4random_uniform(UInt32(max - min))) + min
}

Swift 3

Here's a quick update for Swift 3 and, as a bonus, it now works for any value type that conforms to the SignedInteger protocol - much more convenient for core data applications that need to specify Int16, Int32 etc. As a quick note, if you really need it to work on unsigned integers as well, just copy the entire function then replace SignedInteger with UnsignedInteger and toIntMax() with toUIntMax().

func randomNumber<T : SignedInteger>(inRange range: ClosedRange<T> = 1...6) -> T {
    let length = (range.upperBound - range.lowerBound + 1).toIntMax()
    let value = arc4random().toIntMax() % length + range.lowerBound.toIntMax()
    return T(value)
}

Swift 4

Thanks to the removal of toIntMax() in Swift 4, we now have to use a different means of converting to a common integer type. In this example I'm using Int64 which is large enough for my purposes, but if you're using unsigned integers or have an Int128 or Int256 custom type you should use those.

public func randomNumber<T : SignedInteger>(inRange range: ClosedRange<T> = 1...6) -> T {
    let length = Int64(range.upperBound - range.lowerBound + 1)
    let value = Int64(arc4random()) % length + Int64(range.lowerBound)
    return T(value)
}

One more, for the total random-phile, here's an extension that returns a random element from any Collection type object. Note this uses the above function to generate its index so you will need both.

extension Collection {
    func randomItem() -> Self.Iterator.Element {
        let count = distance(from: startIndex, to: endIndex)
        let roll = randomNumber(inRange: 0...count-1)
        return self[index(startIndex, offsetBy: roll)]
    }
}

Usage

randomNumber()

returns a random number between 1 and 6.

randomNumber(50...100)

returns a number between 50 and 100 inclusive. Naturally you can replace the values of 50 and 100 with whatever you like.

Swift 4.2

Alas, my best StackOverflow answer has been rendered obsolete at last. You can now use simply Int.random(in: 1 ... 6) to generate a random number in a given range. Also works for other forms of integer and floating point number. Collection types also now provide shuffle() and randomElement() functions. There is therefore no longer any need for fancy randomisation functions unless you want to use a specific randomiser type.

CSS On hover show another element

It is indeed possible with the following code

 <div href="#" id='a'>
     Hover me
 </div>

<div id='b'>
    Show me
</div>

and css

#a {
  display: block;
}

#a:hover + #b {
  display:block;
}

#b {
  display:none;
  }

Now by hovering on element #a shows element #b.

Most simple code to populate JTable from ResultSet

go here java tips weblog

then,put in your project : listtabelmodel.java and rowtablemodel.java add another class with this code:

    enter code here
/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package comp;

import java.awt.*;
import java.sql.*;
import java.util.*;
import javax.swing.*;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.table.*;

public class TableFromDatabase extends JPanel {

    private Connection conexao = null;

    public TableFromDatabase() {
        Vector columnNames = new Vector();
        Vector data = new Vector();

        try {
            //  Connect to an Access Database
            conexao = DriverManager.getConnection("jdbc:mysql://" + "localhost"
                    + ":3306/yourdatabase", "root", "password");

            //  Read data from a table
            String sql = "select * from tb_something";
            Statement stmt = conexao.createStatement();
            ResultSet rs = stmt.executeQuery(sql);
            ResultSetMetaData md = rs.getMetaData();
            int columns = md.getColumnCount();

            //  Get column names
            for (int i = 1; i <= columns; i++) {
                columnNames.addElement(md.getColumnName(i));
            }

            //  Get row data
            while (rs.next()) {
                Vector row = new Vector(columns);

                for (int i = 1; i <= columns; i++) {
                    row.addElement(rs.getObject(i));
                }

                data.addElement(row);
            }

            rs.close();
            stmt.close();
            conexao.close();
        } catch (Exception e) {
            System.out.println(e);
        }

        //  Create table with database data
        JTable table = new JTable(data, columnNames) {
            public Class getColumnClass(int column) {
                for (int row = 0; row < getRowCount(); row++) {
                    Object o = getValueAt(row, column);

                    if (o != null) {
                        return o.getClass();
                    }
                }

                return Object.class;
            }
        };

        JScrollPane scrollPane = new JScrollPane(table);
        add(scrollPane);

        JPanel buttonPanel = new JPanel();
        add(buttonPanel, BorderLayout.SOUTH);
    }

    public static void main(String[] args) {

        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                JFrame frame = new JFrame("any");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                //Create and set up the content pane.
                TableFromDatabase newContentPane = new TableFromDatabase();
                newContentPane.setOpaque(true); //content panes must be opaque
                frame.setContentPane(newContentPane);

                //Display the window.
                frame.pack();
                frame.setVisible(true);
            }
        });

    }
}

then drag this class to you jframe,and it's done

it's deprecated,but it works.........

How do I wait for a promise to finish before returning the variable of a function?

What do I need to do to make this function wait for the result of the promise?

Use async/await (NOT Part of ECMA6, but available for Chrome, Edge, Firefox and Safari since end of 2017, see canIuse)
MDN

    async function waitForPromise() {
        // let result = await any Promise, like:
        let result = await Promise.resolve('this is a sample promise');
    }

Added due to comment: An async function always returns a Promise, and in TypeScript it would look like:

    async function waitForPromise(): Promise<string> {
        // let result = await any Promise, like:
        let result = await Promise.resolve('this is a sample promise');
    }

How do I base64 encode a string efficiently using Excel VBA?

As Mark C points out, you can use the MSXML Base64 encoding functionality as described here.

I prefer late binding because it's easier to deploy, so here's the same function that will work without any VBA references:

Function EncodeBase64(text As String) As String
  Dim arrData() As Byte
  arrData = StrConv(text, vbFromUnicode)

  Dim objXML As Variant
  Dim objNode As Variant

  Set objXML = CreateObject("MSXML2.DOMDocument")
  Set objNode = objXML.createElement("b64")

  objNode.dataType = "bin.base64"
  objNode.nodeTypedValue = arrData
  EncodeBase64 = objNode.text

  Set objNode = Nothing
  Set objXML = Nothing
End Function

jQuery click function doesn't work after ajax call?

The problem is that .click only works for elements already on the page. You have to use something like on if you are wiring up future elements

$("#LangTable").on("click",".deletelanguage", function(){
  alert("success");
});

ASP.NET Custom Validator Client side & Server Side validation not firing

Your CustomValidator will only fire when the TextBox isn't empty.

If you need to ensure that it's not empty then you'll need a RequiredFieldValidator too.

Note: If the input control is empty, no validation functions are called and validation succeeds. Use a RequiredFieldValidator control to require the user to enter data in the input control.

EDIT:

If your CustomValidator specifies the ControlToValidate attribute (and your original example does) then your validation functions will only be called when the control isn't empty.

If you don't specify ControlToValidate then your validation functions will be called every time.

This opens up a second possible solution to the problem. Rather than using a separate RequiredFieldValidator, you could omit the ControlToValidate attribute from the CustomValidator and setup your validation functions to do something like this:

Client Side code (Javascript):

function TextBoxDCountyClient(sender, args) {
    var v = document.getElementById('<%=TextBoxDTownCity.ClientID%>').value;
    if (v == '') {
        args.IsValid = false;  // field is empty
    }
    else {
        // do your other validation tests here...
    }
}

Server side code (C#):

protected void TextBoxDTownCity_Validate(
    object source, ServerValidateEventArgs args)
{
    string v = TextBoxDTownCity.Text;
    if (v == string.Empty)
    {
        args.IsValid = false;  // field is empty
    }
    else
    {
        // do your other validation tests here...
    }
}

Testing Spring's @RequestBody using Spring MockMVC

the following works for me,

  mockMvc.perform(
            MockMvcRequestBuilders.post("/api/test/url")
                    .contentType(MediaType.APPLICATION_JSON)
                    .content(asJsonString(createItemForm)))
            .andExpect(status().isCreated());

  public static String asJsonString(final Object obj) {
    try {
        return new ObjectMapper().writeValueAsString(obj);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

Find nearest value in numpy array

Maybe helpful for ndarrays:

def find_nearest(X, value):
    return X[np.unravel_index(np.argmin(np.abs(X - value)), X.shape)]

You seem to not be depending on "@angular/core". This is an error

This happened to me when I was mixing package managers. My project was generated with Yarn, and after that, I added a couple of dependencies using npm install (this created the package-lock.json with only added dependencies).

Apparently, ng serve used package-lock.json and couldn't find Angular dependencies there. After I started using only Yarn, i.e. yarn add instead of npm install, the error was gone.

How to force a script reload and re-execute?

Small tweak to Luke's answer,

 function reloadJs(src) {
    src = $('script[src$="' + src + '"]').attr("src");
    $('script[src$="' + src + '"]').remove();
    $('<script/>').attr('src', src).appendTo('head');
}

and call it like,

reloadJs("myFile.js");

This will not have any path related issues.

How to join three table by laravel eloquent model

$articles =DB::table('articles')
                ->join('categories','articles.id', '=', 'categories.id')
                ->join('user', 'articles.user_id', '=', 'user.id')
                ->select('articles.id','articles.title','articles.body','user.user_name', 'categories.category_name')
                ->get();
return view('myarticlesview',['articles'=>$articles]);

git diff file against its last change

If you are fine using a graphical tool this works very well:

gitk <file>

gitk now shows all commits where the file has been updated. Marking a commit will show you the diff against the previous commit in the list. This also works for directories, but then you also get to select the file to diff for the selected commit. Super useful!

how to deal with google map inside of a hidden div (Updated picture)

Upon showing the map I am geocoding a address then setting the maps center. The google.maps.event.trigger(map, 'resize'); did not work for me.

I had to use a map.setZoom(14);

Code below:

document.getElementById('map').style.display = 'block';
var geocoder = new google.maps.Geocoder();
        geocoder.geocode({ 'address': input.value }, function(results, status) {
            if (status == google.maps.GeocoderStatus.OK) {
                map.setCenter(results[0].geometry.location);
                var marker2 = new google.maps.Marker({
                    map: map,
                    position: results[0].geometry.location
                });
                map.setZoom(14);
                marker2.addListener('dragend', function (event) {
                    $('#lat').val(event.latLng.lat());
                    $('#lng').val(event.latLng.lng());
                });

            }
        });

How to increase Heap size of JVM

Start the program with -Xms=[size] -Xmx -XX:MaxPermSize=[size] -XX:MaxNewSize=[size]

For example -

-Xms512m -Xmx1152m -XX:MaxPermSize=256m -XX:MaxNewSize=256m

Uses for the '"' entity in HTML

Reason #1

There was a point where buggy/lazy implementations of HTML/XHTML renderers were more common than those that got it right. Many years ago, I regularly encountered rendering problems in mainstream browsers resulting from the use of unencoded quote chars in regular text content of HTML/XHTML documents. Though the HTML spec has never disallowed use of these chars in text content, it became fairly standard practice to encode them anyway, so that non-spec-compliant browsers and other processors would handle them more gracefully. As a result, many "old-timers" may still do this reflexively. It is not incorrect, though it is now probably unnecessary, unless you're targeting some very archaic platforms.

Reason #2

When HTML content is generated dynamically, for example, by populating an HTML template with simple string values from a database, it's necessary to encode each value before embedding it in the generated content. Some common server-side languages provided a single function for this purpose, which simply encoded all chars that might be invalid in some context within an HTML document. Notably, PHP's htmlspecialchars() function is one such example. Though there are optional arguments to htmlspecialchars() that will cause it to ignore quotes, those arguments were (and are) rarely used by authors of basic template-driven systems. The result is that all "special chars" are encoded everywhere they occur in the generated HTML, without regard for the context in which they occur. Again, this is not incorrect, it's simply unnecessary.

Is it possible to have a default parameter for a mysql stored procedure?

Unfortunately, MySQL doesn't support DEFAULT parameter values, so:

CREATE PROCEDURE `blah`
(
  myDefaultParam int DEFAULT 0
)
BEGIN
  -- Do something here
END

returns the error:

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use 
near 'DEFAULT 0) BEGIN END' at line 3

To work around this limitation, simply create additional procedures that assign default values to the original procedure:

DELIMITER //

DROP PROCEDURE IF EXISTS blah//
DROP PROCEDURE IF EXISTS blah2//
DROP PROCEDURE IF EXISTS blah1//
DROP PROCEDURE IF EXISTS blah0//

CREATE PROCEDURE blah(param1 INT UNSIGNED, param2 INT UNSIGNED)
BEGIN
    SELECT param1, param2;
END;
//

CREATE PROCEDURE blah2(param1 INT UNSIGNED, param2 INT UNSIGNED)
BEGIN
    CALL blah(param1, param2);
END;
//

CREATE PROCEDURE blah1(param1 INT UNSIGNED)
BEGIN
    CALL blah2(param1, 3);
END;
//

CREATE PROCEDURE blah0()
BEGIN
    CALL blah1(4);
END;
//

Then, running this:

CALL blah(1, 1);
CALL blah2(2, 2);
CALL blah1(3);
CALL blah0();

will return:

+--------+--------+
| param1 | param2 |
+--------+--------+
|      1 |      1 |
+--------+--------+
1 row in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

+--------+--------+
| param1 | param2 |
+--------+--------+
|      2 |      2 |
+--------+--------+
1 row in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

+--------+--------+
| param1 | param2 |
+--------+--------+
|      3 |      3 |
+--------+--------+
1 row in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

+--------+--------+
| param1 | param2 |
+--------+--------+
|      4 |      3 |
+--------+--------+
1 row in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Then, if you make sure to only use the blah2(), blah1() and blah0() procedures, your code will not need to be immediately updated, when you add a third parameter to the blah() procedure.

How to open html file?

import codecs
f=codecs.open("test.html", 'r')
print f.read()

Try something like this.

Attempt to write a readonly database - Django w/ SELinux error

In short, it happens when the application which writes to the sqlite database does not have write permission.

This can be solved in three ways:

Granting ownership of db.sqlite3 file and its parent directory (thereby write access also) to the user using chown (Eg: chown username db.sqlite3 )
Running the webserver (often gunicorn) as root user (run the command sudo -i before you run gunicorn or django runserver)
Allowing read and write access to all users by running command chmod 777 db.sqlite3 (Dangerous option)

Never go for the third option unless you are running the webserver in a local machine or the data in the database is not at all important for you.

Second option is also not recommended. But you can go for it, if you are sure that your application is not vulnerable for code injection attack.

PHP to write Tab Characters inside a file?

The tab character is \t. Notice the use of " instead of '.

$chunk = "abc\tdef\tghi";

PHP Strings - Double quoted

If the string is enclosed in double-quotes ("), PHP will interpret more escape sequences for special characters:

...

\t horizontal tab (HT or 0x09 (9) in ASCII)

Also, let me recommend the fputcsv() function which is for the purpose of writing CSV files.

How to add 'ON DELETE CASCADE' in ALTER TABLE statement

As explained before:

ALTER TABLE TABLEName
drop CONSTRAINT FK_CONSTRAINTNAME;

ALTER TABLE TABLENAME
ADD CONSTRAINT FK_CONSTRAINTNAME
    FOREIGN KEY (FId)
    REFERENCES OTHERTABLE
        (Id)
    ON DELETE CASCADE ON UPDATE NO ACTION;

As you can see those have to be separated commands, first dropping then adding.

How to print struct variables in console?

p = Project{...}
fmt.Printf("%+v", p)
fmt.Printf("%#v", p) //with type

Why does this code using random strings print "hello world"?

Most random number generators are, in fact, "pseudo random." They are Linear Congruential Generators, or LCGs (http://en.wikipedia.org/wiki/Linear_congruential_generator)

LCGs are quite predictable given a fixed seed. Basically, use a seed that gives you your first letter, then write an app that continues to generate the next int (char) until you hit the next letter in your target string and write down how many times you had to invoke the LCG. Continue until you've generated each and every letter.

Bootstrap dropdown menu not working (not dropping down when clicked)

Adding this script to my code fixed the dropdown menu.

<script>
    $(document).ready(function () {
        $('.dropdown-toggle').dropdown();
    });
</script>

How to prevent XSS with HTML/PHP?

Cross-posting this as a consolidated reference from the SO Documentation beta which is going offline.

Problem

Cross-site scripting is the unintended execution of remote code by a web client. Any web application might expose itself to XSS if it takes input from a user and outputs it directly on a web page. If input includes HTML or JavaScript, remote code can be executed when this content is rendered by the web client.

For example, if a 3rd party side contains a JavaScript file:

// http://example.com/runme.js
document.write("I'm running");

And a PHP application directly outputs a string passed into it:

<?php
echo '<div>' . $_GET['input'] . '</div>';

If an unchecked GET parameter contains <script src="http://example.com/runme.js"></script> then the output of the PHP script will be:

<div><script src="http://example.com/runme.js"></script></div>

The 3rd party JavaScript will run and the user will see "I'm running" on the web page.

Solution

As a general rule, never trust input coming from a client. Every GET parameter, POST or PUT content, and cookie value could be anything at all, and should therefore be validated. When outputting any of these values, escape them so they will not be evaluated in an unexpected way.

Keep in mind that even in the simplest applications data can be moved around and it will be hard to keep track of all sources. Therefore it is a best practice to always escape output.

PHP provides a few ways to escape output depending on the context.

Filter Functions

PHPs Filter Functions allow the input data to the php script to be sanitized or validated in many ways. They are useful when saving or outputting client input.

HTML Encoding

htmlspecialchars will convert any "HTML special characters" into their HTML encodings, meaning they will then not be processed as standard HTML. To fix our previous example using this method:

<?php
echo '<div>' . htmlspecialchars($_GET['input']) . '</div>';
// or
echo '<div>' . filter_input(INPUT_GET, 'input', FILTER_SANITIZE_SPECIAL_CHARS) . '</div>';

Would output:

<div>&lt;script src=&quot;http://example.com/runme.js&quot;&gt;&lt;/script&gt;</div>

Everything inside the <div> tag will not be interpreted as a JavaScript tag by the browser, but instead as a simple text node. The user will safely see:

<script src="http://example.com/runme.js"></script>

URL Encoding

When outputting a dynamically generated URL, PHP provides the urlencode function to safely output valid URLs. So, for example, if a user is able to input data that becomes part of another GET parameter:

<?php
$input = urlencode($_GET['input']);
// or
$input = filter_input(INPUT_GET, 'input', FILTER_SANITIZE_URL);
echo '<a href="http://example.com/page?input="' . $input . '">Link</a>';

Any malicious input will be converted to an encoded URL parameter.

Using specialised external libraries or OWASP AntiSamy lists

Sometimes you will want to send HTML or other kind of code inputs. You will need to maintain a list of authorised words (white list) and un-authorized (blacklist).

You can download standard lists available at the OWASP AntiSamy website. Each list is fit for a specific kind of interaction (ebay api, tinyMCE, etc...). And it is open source.

There are libraries existing to filter HTML and prevent XSS attacks for the general case and performing at least as well as AntiSamy lists with very easy use. For example you have HTML Purifier

Confirmation dialog on ng-click - AngularJS

Delete confirmation popup using bootstrap in angularjs

very simple.. I have one solution for this with using bootstrap conformation popup. Here i am provided

<button ng-click="deletepopup($index)">Delete</button>

in bootstrap model popup:

<div class="modal-footer">
  <a href="" data-dismiss="modal" ng-click="deleteData()">Yes</a>
  <a href="" data-dismiss="modal">No</a>
</div>

var index=0;
$scope.deleteData=function(){
    $scope.model.contacts.splice(index,1);
}
// delete a row 
$scope.deletepopup = function ($index) {
    index=$index;
    $('#myModal').modal('show');
};

when i click delete button bootstrap delete conformation popup will open and when i click yes button row will deleted.

How to parse JSON response from Alamofire API in Swift?

This was build with Xcode 10.1 and Swift 4

Perfect combination "Alamofire"(4.8.1) and "SwiftyJSON"(4.2.0). First you should install both pods

pod 'Alamofire' and pod 'SwiftyJSON'

The server response in JSON format:

{
  "args": {}, 
  "headers": {
    "Accept": "*/*", 
    "Accept-Encoding": "gzip;q=1.0, compress;q=0.5", 
    "Accept-Language": "en;q=1.0", 
    "Host": "httpbin.org", 
    "User-Agent": "AlamoFire TEST/1.0 (com.ighost.AlamoFire-TEST; build:1; iOS 12.1.0) Alamofire/4.8.1"
  }, 
  "origin": "200.55.140.181, 200.55.140.181", 
  "url": "https://httpbin.org/get"
}

In this case I want print the "Host" info : "Host": "httpbin.org"

Alamofire.request("https://httpbin.org/get").validate().responseJSON { response in
        switch response.result {
        case .success:
            print("Validation Successful)")

            if let json = response.data {
                do{
                    let data = try JSON(data: json)
                    let str = data["headers"]["Host"]
                    print("DATA PARSED: \(str)")
                }
                catch{
                print("JSON Error")
                }

            }
        case .failure(let error):
            print(error)
        }
    }

Keep Calm and happy Code

Can´t run .bat file under windows 10

There is no inherent reason that a simple batch file would run in XP but not Windows 10. It is possible you are referencing a command or a 3rd party utility that no longer exists. To know more about what is actually happening, you will need to do one of the following:

Add a pause to the batch file so that you can see what is happening before it exits.
1. Right click on one of the .bat files and select "edit". This will open the file in notepad.
2. Go to the very end of the file and add a new line by pressing "enter".
3. type pause.
4. Save the file.
5. Run the file again using the same method you did before.

- OR -

Run the batch file from a static command prompt so the window does not close.
1. In the folder where the .bat files are located, hold down the "shift" key and right click in the white space.
2. Select "Open Command Window Here".
3. You will now see a new command prompt. Type in the name of the batch file and press enter.

Once you have done this, I recommend creating a new question with the output you see after using one of the methods above.

How to update cursor limit for ORA-01000: maximum open cursors exceed

you can update the setting under init.ora in oraclexe\app\oracle\product\11.2.0\server\config\scripts

Getting user input

sys.argv[0] is not the first argument but the filename of the python program you are currently executing. I think you want sys.argv[1]

Unclosed Character Literal error

Java uses double quotes for "String" and single quotes for 'C'haracters.

What is the best open-source java charting library? (other than jfreechart)

I found this framework: jensoft sw2d, free for non commercial use (dual licensing)

http://www.jensoft.org

regards.

Remove specific characters from a string in Python

line = line.translate(None, " ?.!/;:")

How to identify all stored procedures referring a particular table

The query below works only when searching for dependencies on a table and not those on a column:

EXEC sp_depends @objname = N'TableName';

However, the following query is the best option if you want to search for all sorts of dependencies, it does not miss any thing. It actually gives more information than required.

 select distinct
        so.name
        --, text 
  from 
       sysobjects so, 
       syscomments sc 
  where 
     so.id = sc.id 
     and lower(text) like '%organizationtypeid%'
  order by so.name

How to make a PHP SOAP call using the SoapClient class

You can use SOAP services this way too:

<?php 
//Create the client object
$soapclient = new SoapClient('http://www.webservicex.net/globalweather.asmx?WSDL');

//Use the functions of the client, the params of the function are in 
//the associative array
$params = array('CountryName' => 'Spain', 'CityName' => 'Alicante');
$response = $soapclient->getWeather($params);

var_dump($response);

// Get the Cities By Country
$param = array('CountryName' => 'Spain');
$response = $soapclient->getCitiesByCountry($param);

var_dump($response);

This is an example with a real service, and it works when the url is up.

Just in case the http://www.webservicex.net is down.

Here is another example using the example web service from W3C XML Web Services example, you can find more information on the link.

<?php
//Create the client object
$soapclient = new SoapClient('https://www.w3schools.com/xml/tempconvert.asmx?WSDL');

//Use the functions of the client, the params of the function are in
//the associative array
$params = array('Celsius' => '25');
$response = $soapclient->CelsiusToFahrenheit($params);

var_dump($response);

// Get the Celsius degrees from the Farenheit
$param = array('Fahrenheit' => '25');
$response = $soapclient->FahrenheitToCelsius($param);

var_dump($response);

This is working and returning the converted temperature values.

Hope this helps.

How to vertically center a container in Bootstrap?

My prefered technique :

body {
  display: table;
  position: absolute;
  height: 100%;
  width: 100%;
}

.jumbotron {
   display: table-cell;
   vertical-align: middle;
}

Demo

_x000D_

body {_x000D_
  display: table;_x000D_
  position: absolute;_x000D_
  height: 100%;_x000D_
  width: 100%;_x000D_
}_x000D_
_x000D_
.jumbotron {_x000D_
   display: table-cell;_x000D_
   vertical-align: middle;_x000D_
}

_x000D_

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">_x000D_
<div class="jumbotron vertical-center">_x000D_
  <div class="container text-center">_x000D_
    <h1>The easiest and powerful way</h1>_x000D_
    <div class="row">_x000D_
      <div class="col-md-7">_x000D_
        <div class="top-bg">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</div>_x000D_
      </div>_x000D_
_x000D_
      <div class="col-md-5 iPhone-features">_x000D_
        <ul class="top-features">_x000D_
          <li>_x000D_
            <span><i class="fa fa-random simple_bg top-features-bg"></i></span>_x000D_
            <p><strong>Redirect</strong><br>Visitors where they converts more.</p>_x000D_
          </li>_x000D_
          <li>_x000D_
            <span><i class="fa fa-cogs simple_bg top-features-bg"></i></span>_x000D_
            <p><strong>Track</strong><br>Views, Clicks and Conversions.</p>_x000D_
          </li>_x000D_
          <li>_x000D_
            <span><i class="fa fa-check simple_bg top-features-bg"></i></span>_x000D_
            <p><strong>Check</strong><br>Constantly the status of your links.</p>_x000D_
          </li>_x000D_
          <li>_x000D_
            <span><i class="fa fa-users simple_bg top-features-bg"></i></span>_x000D_
            <p><strong>Collaborate</strong><br>With Customers, Partners and Co-Workers.</p>_x000D_
          </li>_x000D_
          <a href="pricing-and-signup.html" class="btn-primary btn h2 lightBlue get-Started-btn">GET STARTED</a>_x000D_
          <h6 class="get-Started-sub-btn">FREE VERSION AVAILABLE!</h6>_x000D_
        </ul>_x000D_
      </div>_x000D_
    </div>_x000D_
  </div>_x000D_
</div>

_x000D_

log4j vs logback

Not exactly answering your question, but if you could move away from your self-made wrapper then there is Simple Logging Facade for Java (SLF4J) which Hibernate has now switched to (instead of commons logging).

SLF4J suffers from none of the class loader problems or memory leaks observed with Jakarta Commons Logging (JCL).

SLF4J supports JDK logging, log4j and logback. So then it should be fairly easy to switch from log4j to logback when the time is right.

Edit: Aplogies that I hadn't made myself clear. I was suggesting using SLF4J to isolate yourself from having to make a hard choice between log4j or logback.

Check if a String contains a special character

Pattern p = Pattern.compile("[^a-z0-9 ]", Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher("I am a string");
boolean b = m.find();

if (b)
   System.out.println("There is a special character in my string");

Using If else in SQL Select statement

Here, using CASE Statement and find result:

select (case when condition1 then result1
             when condition2 then result2
             else result3
             end) as columnname from tablenmae:

For example:

select (CASE WHEN IDParent< 1 then ID 
             else IDParent END) as columnname
from tablenmae

sudo ln -s /usr/bin/nodejs /usr/bin/node

or install legacy nodejs:

sudo apt-get install nodejs-legacy

As seen in this GitHub issue.

Programs & Examples On #Delayed job

getaddrinfo: nodename nor servname provided, or not known

Logical operator in a handlebars.js {{#if}} conditional

Convert Mat to Array/Vector in OpenCV

How to disable registration new users in Laravel

How to test Spring Data repositories?

tl;dr

Details

Integration tests

Testing custom implementations

How to find all links / pages on a website

Cannot create SSPI context

"NODE_ENV" is not recognized as an internal or external command, operable command or batch file

What are passive event listeners?

Why does overflow:hidden not work in a <td>?

Can a table row expand and close?

MVC ajax json post to controller action method

json parsing error syntax error unexpected end of input

HTML5 Video tag not working in Safari , iPhone and iPad

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

How to find keys of a hash?

Replace characters from a column of a data frame R

Disable arrow key scrolling in users browser

How do I get into a Docker container's shell?

Simple way to repeat a string

AttributeError: 'str' object has no attribute

How can I include all JavaScript files in a directory via JavaScript file?

C# static class why use?

PHP Fatal error: Cannot access empty property

How to replace local branch with remote branch entirely in Git?

How to force 'cp' to overwrite directory instead of creating another one inside?

How to call a button click event from another method

How do I use a PriorityQueue?

Android Studio suddenly cannot resolve symbols

Make XmlHttpRequest POST using JSON

How to resolve "local edit, incoming delete upon update" message

How to request a random row in SQL?

Command to list all files in a folder as well as sub-folders in windows

How to convert NUM to INT in R?

Version vs build in Xcode

Android: adbd cannot run as root in production builds

Writing Unicode text to a text file?

Printing Lists as Tabular Data

DataGridView - Focus a specific cell

How to sort a list of strings?

How can I make a UITextField move up when the keyboard is present - on starting to edit?

How to check if $_GET is empty?

How to vertically align label and input in Bootstrap 3?

How can I copy a conditional formatting from one document to another?

How to exit a 'git status' list in a terminal?

What happened to Lodash _.pluck?

How to put an image next to each other

How to insert special characters into a database?

Fastest Way of Inserting in Entity Framework

Unrecognized escape sequence for path string containing backslashes

how to use font awesome in own css?

Delete item from array and shrink array

Rails.env vs RAILS_ENV

C++ - unable to start correctly (0xc0150002)

jquery change button color onclick

Java String to SHA1

Running windows shell commands with python

How do I get values from a SQL database into textboxes using C#?

How to study design patterns?

What is the difference between ManualResetEvent and AutoResetEvent in .NET?

Add CSS class to a div in code behind

Java 8 Stream API to find Unique Object matching a property value

iterating quickly through list of tuples

How to use SortedMap interface in Java?

tl;dr

NavigableMap

Interface versus concrete class

Choosing implementation

How to design RESTful search/filtering?

How to bind bootstrap popover on dynamic elements

Source

Demo

Demo

How do I solve the INSTALL_FAILED_DEXOPT error?

Finding the max value of an attribute in an array of objects

`NavigableMap`

log_e(n) / log_e(2)

Is " " a replacement of " "?