Using jquery to get element's position relative to viewport

Here are two functions to get the page height and the scroll amounts (x,y) without the use of the (bloated) dimensions plugin:

// getPageScroll() by quirksmode.com
function getPageScroll() {
    var xScroll, yScroll;
    if (self.pageYOffset) {
      yScroll = self.pageYOffset;
      xScroll = self.pageXOffset;
    } else if (document.documentElement && document.documentElement.scrollTop) {
      yScroll = document.documentElement.scrollTop;
      xScroll = document.documentElement.scrollLeft;
    } else if (document.body) {// all other Explorers
      yScroll = document.body.scrollTop;
      xScroll = document.body.scrollLeft;
    }
    return new Array(xScroll,yScroll)
}

// Adapted from getPageSize() by quirksmode.com
function getPageHeight() {
    var windowHeight
    if (self.innerHeight) { // all except Explorer
      windowHeight = self.innerHeight;
    } else if (document.documentElement && document.documentElement.clientHeight) {
      windowHeight = document.documentElement.clientHeight;
    } else if (document.body) { // other Explorers
      windowHeight = document.body.clientHeight;
    }
    return windowHeight
}

Get position/offset of element relative to a parent container?

I got another Solution. Subtract parent property value from child property value

$('child-div').offset().top - $('parent-div').offset().top;

How to find index of STRING array in Java from a given value?

Use Arrays class to do this

Arrays.sort(TYPES);
int index = Arrays.binarySearch(TYPES, "Sedan");

SVG Positioning

I know this is old but neither an <svg> group tag nor a <g> fixed the issue I was facing. I needed to adjust the y position of a tag which also had animation on it.

The solution was to use both the and tag together:

<svg y="1190" x="235">
   <g class="light-1">
     <path />
   </g>
</svg>

How to position three divs in html horizontally?

Get rid of the position:relative; and replace it with float:left; and float:right;.

Example in jsfiddle: http://jsfiddle.net/d9fHP/1/

        <html>
<title>
Website Title </title>
<div id="the whole thing" style="float:left; height:100%; width:100%">
    <div id="leftThing" style="float:left; width:25%; background-color:blue;">
         Left Side Menu
    </div>
    <div id="content" style="float:left; width:50%; background-color:green;">
         Random Content
    </div>
    <div id="rightThing" style="float:right; width:25%; background-color:yellow;">
         Right Side Menu
    </div>
</div>
</html>?

React Native absolute positioning horizontal centre

<View style={{...StyleSheet.absoluteFillObject, justifyContent: 'center', alignItems: 'center'}}>
  <Text>CENTERD TEXT</Text>
</View>

And add this

import {StyleSheet} from 'react-native';

Using Position Relative/Absolute within a TD?

Contents of table cell, variable height, could be more than 60px;

<div style="position: absolute; bottom: 0px;">
    Notice
</div>

Fixed position but relative to container

I did something like that awhile back. I was pretty new to JavaScript, so I'm sure you can do better, but here is a starting point:

function fixxedtext() {
    if (navigator.appName.indexOf("Microsoft") != -1) {
        if (document.body.offsetWidth > 960) {
            var width = document.body.offsetWidth - 960;
            width = width / 2;
            document.getElementById("side").style.marginRight = width + "px";
        }
        if (document.body.offsetWidth < 960) {
            var width = 960 - document.body.offsetWidth;
            document.getElementById("side").style.marginRight = "-" + width + "px";
        }
    }
    else {
        if (window.innerWidth > 960) {
            var width = window.innerWidth - 960;
            width = width / 2;
            document.getElementById("side").style.marginRight = width + "px";
        }
        if (window.innerWidth < 960) {
            var width = 960 - window.innerWidth;
            document.getElementById("side").style.marginRight = "-" + width + "px";
        }
    }
    window.setTimeout("fixxedtext()", 2500)
}

You will need to set your width, and then it gets the window width and changes the margin every few seconds. I know it is heavy, but it works.

Get max and min value from array in JavaScript

use this and it works on both the static arrays and dynamically generated arrays.

var array = [12,2,23,324,23,123,4,23,132,23];
var getMaxValue = Math.max.apply(Math, array );

I had the issue when I use trying to find max value from code below

$('#myTabs').find('li.active').prevAll().andSelf().each(function () {
            newGetWidthOfEachTab.push(parseInt($(this).outerWidth()));
        });

        for (var i = 0; i < newGetWidthOfEachTab.length; i++) {
            newWidthOfEachTabTotal += newGetWidthOfEachTab[i];
            newGetWidthOfEachTabArr.push(parseInt(newWidthOfEachTabTotal));
        }

        getMaxValue = Math.max.apply(Math, array);

I was getting 'NAN' when I use

    var max_value = Math.max(12, 21, 23, 2323, 23);

with my code

How to get mouse position in jQuery without mouse-events?

Moreover, mousemove events are not triggered if you perform drag'n'drop over a browser window. To track mouse coordinates during drag'n'drop you should attach handler for document.ondragover event and use it's originalEvent property.

Example:

var globalDragOver = function (e)
{
    var original = e.originalEvent;
    if (original)
    {
        window.x = original.pageX;
        window.y = original.pageY;
    }
}

css absolute position won't work with margin-left:auto margin-right: auto

Working JSFiddle below. When using position absolute, margin: 0 auto will not work, but you can do like this (will also scale):

left: 50%;
transform: translateX(-50%);

Update: Working JSFiddle

Iframe positioning

It's because you're missing position:relative; on #contentframe

<div id="contentframe" style="position:relative; top: 160px; left: 0px;">

position:absolute; positions itself against the closest ancestor that has a position that is not static. Since the default is static that is what was causing your issue.

How does the "position: sticky;" property work?

z-index is also very important. Sometimes it will work but you just won't see it. Try setting it to some very high number just to be sure. Also don't always put top: 0 but try something higher in case it's hidden somewhere (under a toolbar).

Set The Window Position of an application via command line

Thanks To FuzzyWuzzy , set the following code ( Quick & Dirty Example for 1920x1080 screen resolution - without automatic width and height calculation or function use etc ) in AutoHotKey to achive the following :

v_cmd = c:\temp\1st_Monitor.ps1
Run, Powershell.exe -executionpolicy remotesigned -File %v_cmd%
SetTitleMatchMode 2
SetTitleMatchMode Fast
WinWait, PowerShell
Sleep, 1000
    ;A = Active window - [x,y,width,height]
WinMove A,, 0, 0,1920,500

v_cmd = c:\temp\2nd_Monitor.ps1
Run, Powershell.exe -executionpolicy remotesigned -File %v_cmd%
WinWait, PowerShell
Sleep, 1000
    ;A = Active window - [x,y,width,height]
WinMove A,, 0, 500,960,400

v_cmd = c:\temp\3rd_Monitor.ps1
Run, Powershell.exe -executionpolicy remotesigned -File %v_cmd%
WinWait, PowerShell
Sleep, 1000
    ;A = Active window - [x,y,width,height]
WinMove A,, 960, 500,960,400

SMALL EDIT same code with Auto X / Y screen size calculation [ 4 monitors ], yet, can be used for 3 / 2 monitors as well.

Screen_X = %A_ScreenWidth%
Screen_Y = %A_ScreenHeight%

v_cmd = c:\temp\1st_Monitor.ps1
Run, Powershell.exe -executionpolicy remotesigned -File %v_cmd%
SetTitleMatchMode 2
SetTitleMatchMode Fast
WinWait, PowerShell
Sleep, 1000
    ;A = Active window - [x,y,width,height]
WinMove A,, 0, 0,Screen_X/2,Screen_Y/2

v_cmd = c:\temp\2nd_Monitor.ps1
Run, Powershell.exe -executionpolicy remotesigned -File %v_cmd%
WinWait, PowerShell
Sleep, 1000
    ;A = Active window - [x,y,width,height]
WinMove A,, Screen_X/2, 0,Screen_X/2,Screen_Y/2

v_cmd = c:\temp\3rd_Monitor.ps1
Run, Powershell.exe -executionpolicy remotesigned -File %v_cmd%
WinWait, PowerShell
Sleep, 1000
    ;A = Active window - [x,y,width,height]
WinMove A,, 0, Screen_Y/2,Screen_X/2,Screen_Y/2

v_cmd = c:\temp\4th_Monitor.ps1
Run, Powershell.exe -executionpolicy remotesigned -File %v_cmd%
WinWait, PowerShell
Sleep, 1000
    ;A = Active window - [x,y,width,height]
WinMove A,, Screen_X/2, Screen_Y/2,Screen_X/2,Screen_Y/2

Float right and position absolute doesn't work together

You can use "translateX(-100%)" and "text-align: right" if your absolute element is "display: inline-block"

<div class="box">
<div class="absolute-right"></div>
</div>

<style type="text/css">
.box{
    text-align: right;
}
.absolute-right{
    display: inline-block;
    position: absolute;
}

/*The magic:*/
.absolute-right{
-moz-transform: translateX(-100%);
-ms-transform: translateX(-100%);
-webkit-transform: translateX(-100%);
-o-transform: translateX(-100%);
transform: translateX(-100%);
}
</style>

You will get absolute-element aligned to the right relative its parent

How do I get the coordinate position after using jQuery drag and drop?

This worked for me:

$("#element1").droppable(
{
    drop: function(event, ui)
    {
        var currentPos = ui.helper.position();
            alert("left="+parseInt(currentPos.left)+" top="+parseInt(currentPos.top));
    }
});

Check if element is visible on screen

Could you use jQuery, since it's cross-browser compatible?

function isOnScreen(element)
{
    var curPos = element.offset();
    var curTop = curPos.top;
    var screenHeight = $(window).height();
    return (curTop > screenHeight) ? false : true;
}

And then call the function using something like:

if(isOnScreen($('#myDivId'))) { /* Code here... */ };

Retrieve the position (X,Y) of an HTML element relative to the browser window

I did it like this so it was cross-compatible with old browsers.

// For really old browser's or incompatible ones
    function getOffsetSum(elem) {
        var top = 0,
            left = 0,
            bottom = 0,
            right = 0

         var width = elem.offsetWidth;
         var height = elem.offsetHeight;

        while (elem) {
            top += elem.offsetTop;
            left += elem.offsetLeft;
            elem = elem.offsetParent;
        }

         right = left + width;
         bottom = top + height;

        return {
            top: top,
            left: left,
            bottom: bottom,
            right: right,
        }
    }

    function getOffsetRect(elem) {
        var box = elem.getBoundingClientRect();

        var body = document.body;
        var docElem = document.documentElement;

        var scrollTop = window.pageYOffset || docElem.scrollTop || body.scrollTop;
        var scrollLeft = window.pageXOffset || docElem.scrollLeft || body.scrollLeft;

        var clientTop = docElem.clientTop;
        var clientLeft = docElem.clientLeft;


        var top = box.top + scrollTop - clientTop;
        var left = box.left + scrollLeft - clientLeft;
        var bottom = top + (box.bottom - box.top);
        var right = left + (box.right - box.left);

        return {
            top: Math.round(top),
            left: Math.round(left),
            bottom: Math.round(bottom),
            right: Math.round(right),
        }
    }

    function getOffset(elem) {
        if (elem) {
            if (elem.getBoundingClientRect) {
                return getOffsetRect(elem);
            } else { // old browser
                return getOffsetSum(elem);
            }
        } else
            return null;
    }

More about coordinates in JavaScript here: http://javascript.info/tutorial/coordinates

How to set JFrame to appear centered, regardless of monitor resolution?

Just click on form and go to JFrame properties, then Code tab and check Generate Center.

Make absolute positioned div expand parent div height

This is very similar to what @ChrisC suggested. It is not using an absolute positioned element, but a relative one. Maybe could work for you

<div class="container">
  <div class="my-child"></div>
</div>

And your css like this:

.container{
    background-color: red;
    position: relative;
    border: 1px solid black;
    width: 100%;
}

.my-child{
    position: relative;
    top: 0;
    left: 100%;
    height: 100px;
    width: 100px;
    margin-left: -100px;
    background-color: blue;
}

https://jsfiddle.net/royriojas/dndjwa6t/

How to position the div popup dialog to the center of browser screen?

Its a classical problem, when you scroll the modal popup generated on the screen stays at it place and does not scroll along, so the user might be blocked as he might not see the popup on his viewable screen.

The following link also provides CSS only code for generating a modal box along with its absolute position.

http://settledcuriosity.wordpress.com/2014/10/03/centering-a-popup-box-absolutely-at-the-center-of-screen/

scrollTop jquery, scrolling to div with id?

try this:

$('html, body').animate({scrollTop:$('#xxx').position().top}, 'slow');
$('#xxx').focus();

Float a DIV on top of another DIV

Just add position, right and top to your class .close-image

.close-image {
    cursor: pointer;
    display: block;
    float: right;  
    z-index: 3;
    position: absolute; /*newly added*/
    right: 5px; /*newly added*/
    top: 5px;/*newly added*/
}

Display Images Inline via CSS

The code you have posted here and code on your site both are different. There is a break <br> after second image, so the third image into new line, remove this <br> and it will display correctly.

How to overlay one div over another div

The new Grid CSS specification provides a far more elegant solution. Using position: absolute may lead to overlaps or scaling issues while Grid will save you from dirty CSS hacks.

Most minimal Grid Overlay example:

HTML

<div class="container">
  <div class="content">This is the content</div>
  <div class="overlay">Overlay - must be placed under content in the HTML</div>
</div>

CSS

.container {
  display: grid;
}

.content, .overlay {
  grid-area: 1 / 1;
}

That's it. If you don't build for Internet Explorer, your code will most probably work.

RecyclerView - Get view at particular position

You can make ArrayList of ViewHolder :

 ArrayList<MyViewHolder> myViewHolders = new ArrayList<>();
 ArrayList<MyViewHolder> myViewHolders2 = new ArrayList<>();

and, all store ViewHolder(s) in the list like :

 @Override
    public void onBindViewHolder(@NonNull final MyViewHolder holder, final int position) {
        final String str = arrayList.get(position);

        myViewHolders.add(position,holder);
}

and add/remove other ViewHolder in the ArrayList as per your requirement.

Logo image and H1 heading on the same line

Try this:

<img style="display: inline;" src="img/logo.png" alt="logo" />
<h1 style="display: inline;">My website name</h1>

How to position the Button exactly in CSS

I'd use absolute positioning:

#play_button {
    position:absolute;
transition: .5s ease;
    left: 202px;
    top: 198px;

}

How to set iPhone UIView z index?

IB and Swift

Given the flowing layout where yellow is the superview and red, green, and blue are sibling subviews of yellow,

the goal is to move a subview (let's say green) to the top.

In Interface Builder

In the Interface Builder all you need to do is drag the view you want showing on the top to the bottom of the list in the Documents Outline.

Alternatively, you can select the view and then in the menu go to Editor > Arrange > Send to Front.

In Swift

There are a couple of different ways to do this programmatically.

Method 1

yellowView.bringSubviewToFront(greenView)

This method is the programmatic equivalent of the IB answer above.
It only works if the subviews are siblings of each other.
An array of the subviews is contained in yellowView.subviews. Here, bringSubviewToFront moves the greenView from index 0 to 2. This can be observed with
```
  print(yellowView.subviews.indexOf(greenView))
```

Method 2

greenView.layer.zPosition = 1

This method just moves the 3D position of the layer higher (closer to the user) on the z-axis. Since the default is 0 for all the other views, the result is that the greenView looks like it is on top. However, it still remains at index 0 of the yellowView.subviews array. This can cause some unexpected results, though, because things like tap events will still go first to the view with the highest index number. For that reason, it might be better to go with Method 1 above.
The zPosition could be set to CGFloat.greatestFiniteMagnitude (CGFloat(FLT_MAX) in older versions of Swift) to ensure that it is on top.

HTML CSS Button Positioning

Use margins instead of line-height and then apply float to the buttons. By default they are displaying as inline-block, so when one is pushed down the hole line is pushed down with him. Float fixes this:

#header button {
    float:left;
}

Here's a working jsfidle.

rotate image with css

Give the parent a style of overflow: hidden. If it is overlapping sibling elements, you will have to put it inside of a container with a fixed height/width and give that a style of overflow: hidden.

Position: absolute and parent height?

Here is my workaround,
In your example you can add a third element with "same styles" of .one & .two elements, but without the absolute position and with hidden visibility:

HTML

<article>
   <div class="one"></div>
   <div class="two"></div>
   <div class="three"></div>
</article>

CSS

.three{
    height: 30px;
    z-index: -1;
    visibility: hidden;
}

RecyclerView - How to smooth scroll to top of item on a certain position?

Thanks, @droidev for the solution. If anyone looking for Kotlin solution, refer this:

    class LinearLayoutManagerWithSmoothScroller: LinearLayoutManager {
    constructor(context: Context) : this(context, VERTICAL,false)
    constructor(context: Context, orientation: Int, reverseValue: Boolean) : super(context, orientation, reverseValue)

    override fun smoothScrollToPosition(recyclerView: RecyclerView?, state: RecyclerView.State?, position: Int) {
        super.smoothScrollToPosition(recyclerView, state, position)
        val smoothScroller = TopSnappedSmoothScroller(recyclerView?.context)
        smoothScroller.targetPosition = position
        startSmoothScroll(smoothScroller)
    }

    private class TopSnappedSmoothScroller(context: Context?) : LinearSmoothScroller(context){
        var mContext = context
        override fun computeScrollVectorForPosition(targetPosition: Int): PointF? {
            return LinearLayoutManagerWithSmoothScroller(mContext as Context)
                    .computeScrollVectorForPosition(targetPosition)
        }

        override fun getVerticalSnapPreference(): Int {
            return SNAP_TO_START
        }


    }

}

c# datatable insert column at position 0

You can use the following code to add column to Datatable at postion 0:

    DataColumn Col   = datatable.Columns.Add("Column Name", System.Type.GetType("System.Boolean"));
    Col.SetOrdinal(0);// to put the column in position 0;

Set the absolute position of a view

Try below code to set view on specific location :-

            TextView textView = new TextView(getActivity());
            textView.setId(R.id.overflowCount);
            textView.setText(count + "");
            textView.setGravity(Gravity.CENTER);
            textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 12);
            textView.setTextColor(getActivity().getResources().getColor(R.color.white));
            textView.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    // to handle click 
                }
            });
            // set background 
            textView.setBackgroundResource(R.drawable.overflow_menu_badge_bg);

            // set apear

            textView.animate()
                    .scaleXBy(.15f)
                    .scaleYBy(.15f)
                    .setDuration(700)
                    .alpha(1)
                    .setInterpolator(new BounceInterpolator()).start();
            FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(
                    FrameLayout.LayoutParams.WRAP_CONTENT,
                    FrameLayout.LayoutParams.WRAP_CONTENT);
            layoutParams.topMargin = 100; // margin in pixels, not dps
            layoutParams.leftMargin = 100; // margin in pixels, not dps
            textView.setLayoutParams(layoutParams);

            // add into my parent view
            mainFrameLaout.addView(textView);

Center a 'div' in the middle of the screen, even when the page is scrolled up or down?

Correct Method is

.PopupPanel
{
    border: solid 1px black;
    position: fixed;
    left: 50%;
    top: 50%;
    background-color: white;
    z-index: 100;
    height: 400px;
    margin-top: -200px;

    width: 600px;
    margin-left: -300px;
}

css - position div to bottom of containing div

.outside {
    width: 200px;
    height: 200px;
    background-color: #EEE; /*to make it visible*/
}

Needs to be

.outside {
    position: relative;
    width: 200px;
    height: 200px;
    background-color: #EEE; /*to make it visible*/
}

Absolute positioning looks for the nearest relatively positioned parent within the DOM, if one isn't defined it will use the body.

Insert node at a certain position in a linked list C++

Node* insert_node_at_nth_pos(Node *head, int data, int position)
{   
    /* current node */
    Node* cur = head;

    /* initialize new node to be inserted at given position */
    Node* nth = new Node;
    nth->data = data;
    nth->next = NULL;

    if(position == 0){
        /* insert new node at head */
        head = nth;
        head->next = cur;
        return head;
    }else{
        /* traverse list */
        int count = 0;            
        Node* pre = new Node;

        while(count != position){
            if(count == (position - 1)){
                pre = cur;
            }
            cur = cur->next;            
            count++;
        }

        /* insert new node here */
        pre->next = nth;
        nth->next = cur;

        return head;
    }    
}

jQuery UI dialog box not positioned center screen

to position the dialog in the center of the screen :

$('#my-selector').parent().position({
                    my: "center",
                    at: "center",
                    of: window
});

Google Chrome default opening position and size

You should just grab the window by the title bar and snap it to the left side of your screen (close browser) then reopen the browser ans snap it to the top... problem is over.

CSS: Position loading indicator in the center of the screen

You can use this OnLoad or during fetch infos from DB

In HTML Add following code:

<div id="divLoading">
<p id="loading">
    <img src="~/images/spinner.gif">
</p>

In CSS add following Code:

#divLoading {
  margin: 0px;
  display: none;
  padding: 0px;
  position: absolute;
  right: 0px;
  top: 0px;
  width: 100%;
  height: 100%;
  background-color: rgb(255, 255, 255);
  z-index: 30001;
  opacity: 0.8;}

#loading {
   position: absolute;
   color: White;
  top: 50%;
  left: 45%;}

if you want to show and hide from JS:

  document.getElementById('divLoading').style.display = 'none'; //Not Visible
  document.getElementById('divLoading').style.display = 'block';//Visible

Slide right to left?

Use this:

$('#pollSlider-button').animate({"margin-right": '+=200'});

Live demo

Improved version

Some code has been added to the demo, to prevent double margin on double click: http://jsfiddle.net/XNnHC/942/

Use it with easing ;)

http://jsfiddle.net/XNnHC/1591/

Extra JavaScript codes removed.
Class names & some CSS codes changed
Added feature to find if is expanded or collapsed
Changed whether use easing effect or not
Changed animation speed

http://jsfiddle.net/XNnHC/1808/

Android ListView Divider

you forgot an "r" at the end of divider in your divider xml layout

you call the layout @drawable/list_divider but your divider xml is named "list_divide"

How can I get the root domain URI in ASP.NET?

--Adding the port can help when running IIS Express

Request.Url.Scheme + "://" + Request.Url.Host + ":" + Request.Url.Port

How to Run a jQuery or JavaScript Before Page Start to Load

Hide the body with css then show it after the page is loaded:

CSS:

html { visibility:hidden; }

Javascript

$(document).ready(function() {
  document.getElementsByTagName("html")[0].style.visibility = "visible";
});

The page will go from blank to showing all content when the page is loaded, no flash of content, no watching images load etc.

Change bootstrap navbar background color and font color

Most likely these classes are already defined by Bootstrap, make sure that your CSS file that you want to override the classes with is called AFTER the Bootstrap CSS.

<link rel="stylesheet" href="css/bootstrap.css" /> <!-- Call Bootstrap first -->
<link rel="stylesheet" href="css/bootstrap-override.css" /> <!-- Call override CSS second -->

Otherwise, you can put !important at the end of your CSS like this: color:#ffffff!important; but I would advise against using !important at all costs.

Get UIScrollView to scroll to the top

jQuery: How to get to a particular child of a parent?

This will find the first parent with class box then find the first child class with regex matching something and get the id.

$(".mylink").closest(".box").find('[class*="something"]').first().attr("id")

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

Maybe, because you are under IIS,

$_SERVER['PATH_INFO']

is what you want, based on the URLs you used to explain.

For Apache, you'd use $_SERVER['REQUEST_URI'].

Why doesn't java.io.File have a close method?

Essentially random access file wraps input and output streams in order to manage the random access. You don't open and close a file, you open and close streams to a file.

How to properly use unit-testing's assertRaises() with NoneType objects?

The usual way to use assertRaises is to call a function:

self.assertRaises(TypeError, test_function, args)

to test that the function call test_function(args) raises a TypeError.

The problem with self.testListNone[:1] is that Python evaluates the expression immediately, before the assertRaises method is called. The whole reason why test_function and args is passed as separate arguments to self.assertRaises is to allow assertRaises to call test_function(args) from within a try...except block, allowing assertRaises to catch the exception.

Since you've defined self.testListNone = None, and you need a function to call, you might use operator.itemgetter like this:

import operator
self.assertRaises(TypeError, operator.itemgetter, (self.testListNone,slice(None,1)))

since

operator.itemgetter(self.testListNone,slice(None,1))

is a long-winded way of saying self.testListNone[:1], but which separates the function (operator.itemgetter) from the arguments.

error LNK2038: mismatch detected for '_MSC_VER': value '1600' doesn't match value '1700' in CppFile1.obj

for each project in your solution make sure that

Properties > Config. Properties > General > Platform Toolset

is one for all of them, v100 for visual studio 2010, v110 for visual studio 2012

you also may be working on v100 from visual studio 2012

Git - How to fix "corrupted" interactive rebase?

I have tried all the above steps mentioned but nothing worked for me. Finally, restarting the computer worked for this issue :D

Response Content type as CSV

Use text/csv as the content type.

What is ADT? (Abstract Data Type)

The term data type is as the type of data which a particular variable can hold - it may be an integer, a character, a float, or any range of simple data storage representation. However, when we build an object oriented system, we use other data types, known as abstract data type, which represents more realistic entities.

E.g.: We might be interested in representing a 'bank account' data type, which describe how all bank account are handled in a program. Abstraction is about reducing complexity, ignoring unnecessary details.

How to use foreach with a hash reference?

So, with Perl 5.20, the new answer is:

foreach my $key (keys $ad_grp_ref->%*) {

(which has the advantage of transparently working with more complicated expressions:

foreach my $key (keys $ad_grp_obj[3]->get_ref()->%*) {

etc.)

See perlref for the full documentation.

Note: in Perl version 5.20 and 5.22, this syntax is considered experimental, so you need

use feature 'postderef';
no warnings 'experimental::postderef';

at the top of any file that uses it. Perl 5.24 and later don't require any pragmas for this feature.

python : list index out of range error while iteratively popping elements

I think the best way to solve this problem is:

l = [1, 2, 3, 0, 0, 1]
while 0 in l:
    l.remove(0)

Instead of iterating over list I remove 0 until there aren't any 0 in list

WARNING: Setting property 'source' to 'org.eclipse.jst.jee.server:appname' did not find a matching property

You can change the eclipse tomcat server configuration. Open the server view, double click on you server to open server configuration. Then click to activate "Publish module contents to separate XML files". Finally, restart your server, the message must disappear.

Source: http://www.albeesonline.com/blog/2008/11/29/warning-setpropertiesruleserverserviceenginehostcontext-setting-property/

Python error message io.UnsupportedOperation: not readable

Use `a+` to open a file for reading, writing as well as create it if it doesn't exist.

a+ Opens a file for both appending and reading. The file pointer is at the end of the file if the file exists. The file opens in the append mode. If the file does not exist, it creates a new file for reading and writing. -Python file modes

with open('"File.txt', 'a+') as file:
    print(file.readlines())
    file.write("test")

Note: opening file in a with block makes sure that the file is properly closed at the block's end, even if an exception is raised on the way. It's equivalent to try-finally, but much shorter.

Newline in JLabel

You can use the MultilineLabel component in the Jide Open Source Components.

http://www.jidesoft.com/products/oss.htm

Java string split with "." (dot)

The dot "." is a special character in java regex engine, so you have to use "\\." to escape this character:

final String extensionRemoved = filename.split("\\.")[0];

I hope this helps

Get commit list between tags in git

FYI:

git log tagA...tagB

provides standard log output in a range.

jQuery and AJAX response header

The underlying XMLHttpRequest object used by jQuery will always silently follow redirects rather than return a 302 status code. Therefore, you can't use jQuery's AJAX request functionality to get the returned URL. Instead, you need to put all the data into a form and submit the form with the target attribute set to the value of the name attribute of the iframe:

$('#myIframe').attr('name', 'myIframe');

var form = $('<form method="POST" action="url.do"></form>').attr('target', 'myIframe');
$('<input type="hidden" />').attr({name: 'search', value: 'test'}).appendTo(form);

form.appendTo(document.body);
form.submit();

The server's url.do page will be loaded in the iframe, but when its 302 status arrives, the iframe will be redirected to the final destination.

Visual Studio build fails: unable to copy exe-file from obj\debug to bin\debug

My solution has nothing to do with versions, processes being locked, restarting, or deleting files.

The problem was actually due to the build failing, and not giving the correct error. The actual problem was a design flaw:

// Either this should be declared outside the function, or..
SomeObject a = new SomeObject(); 

Task.Factory.StartNew(() =>
{
   while (true)
   {
      a.waitForSomething();
   }
});

// ...this should not be called
a.doSomething();

After changing the scope of "a" to outside the function, or not using "a" after Task.Factory.StartNew();, I was able to build again.

This happened when using VS2012 Update 4 on Windows7x64 sp1.

Error message:

C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets(3390,5): error MSB3030: Could not copy the file "obj\x86\Debug\xxx.exe" because it was not found.

How to fire a change event on a HTMLSelectElement if the new value is the same as the old?

You have to add empty option to solve it,

I also can give you one more solution but its up to you that is fine for you or not Because User select default option after selecting other options than jsFunction will be called twice.

<select onChange="jsFunction()" id="selectOpt">
    <option value="1" onclick="jsFunction()">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
</select>

function jsFunction(){
  var myselect = document.getElementById("selectOpt");
  alert(myselect.options[myselect.selectedIndex].value);
}

MySQL - UPDATE query with LIMIT

For people get this post by search "update limit MySQL" trying to avoid turning off the safe update mode when facing update with the multiple-table syntax.

Since the offical document state

For the multiple-table syntax, UPDATE updates rows in each table named in table_references that satisfy the conditions. In this case, ORDER BY and LIMIT cannot be used.

https://stackoverflow.com/a/28316067/1278112
I think this answer is quite helpful. It gives an example

UPDATE customers SET countryCode = 'USA' WHERE country = 'USA'; -- which gives the error, you just write:

UPDATE customers SET countryCode = 'USA' WHERE (country = 'USA' AND customerNumber <> 0); -- Because customerNumber is a primary key you got no error 1175 any more.

What I want but would raise error code 1175.

UPDATE table1 t1
        INNER JOIN
    table2 t2 ON t1.name = t2.name 
SET 
    t1.column = t2.column
WHERE
    t1.name = t2.name;

The working edition

UPDATE table1 t1
        INNER JOIN
    table2 t2 ON t1.name = t2.name 
SET 
    t1.column = t2.column
WHERE
    (t1.name = t2.name and t1.prime_key !=0);

Which is really simple and elegant. Since the original answer doesn't get too much attention (votes), I post more explanation. Hope this can help others.

How to run specific test cases in GoogleTest

Summarising @Rasmi Ranjan Nayak and @nogard answers and adding another option:

On the console

You should use the flag --gtest_filter, like

--gtest_filter=Test_Cases1*

(You can also do this in Properties|Configuration Properties|Debugging|Command Arguments)

On the environment

You should set the variable GTEST_FILTER like

export GTEST_FILTER = "Test_Cases1*"

On the code

You should set a flag filter, like

::testing::GTEST_FLAG(filter) = "Test_Cases1*";

such that your main function becomes something like

int main(int argc, char **argv) {
    ::testing::InitGoogleTest(&argc, argv);
    ::testing::GTEST_FLAG(filter) = "Test_Cases1*";
    return RUN_ALL_TESTS();
}

See section Running a Subset of the Tests for more info on the syntax of the string you can use.

How do I dynamically set HTML5 data- attributes using react?

You should not wrap JavaScript expressions in quotes.

<option data-img-src={this.props.imageUrl} value="1">{this.props.title}</option>

Take a look at the JavaScript Expressions docs for more info.

Removing double quotes from a string in Java

String withoutQuotes_line1 = line1.replace("\"", "");

have a look here

Add & delete view from Layout

hi if are you new in android use this way Apply your view to make it gone GONE is one way, else, get hold of the parent view, and remove the child from there..... else get the parent layout and use this method an remove all child parentView.remove(child)

I would suggest using the GONE approach...

How can I make a jQuery UI 'draggable()' div draggable for touchscreen?

After wasting many hours, I came across this!

jquery-ui-touch-punch

It translates tap events as click events. Remember to load the script after jquery.

I got this working on the iPad and iPhone

$('#movable').draggable({containment: "parent"});

CSS force new line

How about with a :before pseudoelement:

a:before {
  content: '\a';
  white-space: pre;
}

Angular 4 - get input value

<form (submit)="onSubmit()">
   <input [(ngModel)]="playerName">
</form>

let playerName: string;
onSubmit() {
  return this.playerName;
}

jQuery CSS Opacity

Try with this :

jQuery('#main').css({ opacity: 0.6 });

How do I deserialize a complex JSON object in C# .NET?

I solved this problem to add a public setter for all properties, which should be deserialized.

Can't type in React input text field

I also have same problem and in my case I injected reducer properly but still I couldn't type in field. It turns out if you are using immutable you have to use redux-form/immutable.

import {reducer as formReducer} from 'redux-form/immutable';
const reducer = combineReducers{

    form: formReducer
}
import {Field, reduxForm} from 'redux-form/immutable';
/* your component */

Notice that your state should be like state->form otherwise you have to explicitly config the library also the name for state should be form. see this issue

dropping infinite values from dataframes in pandas?

The simplest way would be to first replace infs to NaN:

df.replace([np.inf, -np.inf], np.nan)

and then use the dropna:

df.replace([np.inf, -np.inf], np.nan).dropna(subset=["col1", "col2"], how="all")

For example:

In [11]: df = pd.DataFrame([1, 2, np.inf, -np.inf])

In [12]: df.replace([np.inf, -np.inf], np.nan)
Out[12]:
    0
0   1
1   2
2 NaN
3 NaN

The same method would work for a Series.

addEventListener in Internet Explorer

addEventListener is supported from version 9 onwards; for older versions use the somewhat similar attachEvent function.

Find common substring between two strings

Fix bugs with the first's answer:

def longestSubstringFinder(string1, string2):
    answer = ""
    len1, len2 = len(string1), len(string2)
    for i in range(len1):
        for j in range(len2):
            lcs_temp=0
            match=''
            while ((i+lcs_temp < len1) and (j+lcs_temp<len2) and string1[i+lcs_temp] == string2[j+lcs_temp]):
                match += string2[j+lcs_temp]
                lcs_temp+=1
            if (len(match) > len(answer)):
                answer = match
    return answer

print longestSubstringFinder("dd apple pie available", "apple pies")
print longestSubstringFinder("cov_basic_as_cov_x_gt_y_rna_genes_w1000000", "cov_rna15pcs_as_cov_x_gt_y_rna_genes_w1000000")
print longestSubstringFinder("bapples", "cappleses")
print longestSubstringFinder("apples", "apples")

Regex: Specify "space or start of string" and "space or end of string"

Here's what I would use:

 (?<!\S)stackoverflow(?!\S)

In other words, match "stackoverflow" if it's not preceded by a non-whitespace character and not followed by a non-whitespace character.

This is neater (IMO) than the "space-or-anchor" approach, and it doesn't assume the string starts and ends with word characters like the \b approach does.

How can I list all foreign keys referencing a given table in SQL Server?

This gives you:

The FK itself itself
Schema that the FK belongs to
The "referencing table" or the table that has the FK
The "referencing column" or the column inside referencing table that points to the FK
The "referenced table" or the table that has the key column that your FK is pointing to
The "referenced column" or the column that is the key that your FK is pointing to

Code below:

SELECT  obj.name AS FK_NAME,
    sch.name AS [schema_name],
    tab1.name AS [table],
    col1.name AS [column],
    tab2.name AS [referenced_table],
    col2.name AS [referenced_column]
FROM sys.foreign_key_columns fkc
INNER JOIN sys.objects obj
    ON obj.object_id = fkc.constraint_object_id
INNER JOIN sys.tables tab1
    ON tab1.object_id = fkc.parent_object_id
INNER JOIN sys.schemas sch
    ON tab1.schema_id = sch.schema_id
INNER JOIN sys.columns col1
    ON col1.column_id = parent_column_id AND col1.object_id = tab1.object_id
INNER JOIN sys.tables tab2
    ON tab2.object_id = fkc.referenced_object_id
INNER JOIN sys.columns col2
    ON col2.column_id = referenced_column_id AND col2.object_id = tab2.object_id

How can I access getSupportFragmentManager() in a fragment?

My Parent Activity extends AppCompatActivity so I had to cast my context to AppCompatActivity instead of just Activity.

eg.

FragmentAddProduct fragmentAddProduct = FragmentAddProduct.newInstance();
FragmentTransaction fragmentTransaction = ((AppCompatActivity)mcontext).getSupportFragmentManager().beginTransaction();

How to install JDBC driver in Eclipse web project without facing java.lang.ClassNotFoundexception

My issue was a little different. Instead of jdbc:oracle:thin:@server:port/service i had it as server:port/service.

Missing was jdbc:oracle:thin:@ in url attribute in GlobalNamingResources.Resource. But I overlooked tomcat exception's

java.sql.SQLException: Cannot create JDBC driver of class 'oracle.jdbc.driver.OracleDriver' for connect URL 'server:port/service'

Accessing Websites through a Different Port?

when viewing a website it gets assigned a random port, it will always come from port 80 (usually always, unless the server admin has changed the port) there's no way for someone to change that port unless you have control of the server.

Are 64 bit programs bigger and faster than 32 bit versions?

In addition to having more registers, 64-bit has SSE2 by default. This means that you can indeed perform some calculations in parallel. The SSE extensions had other goodies too. But I guess the main benefit is not having to check for the presence of the extensions. If it's x64, it has SSE2 available. ...If my memory serves me correctly.

How can I style even and odd elements?

 <ul class="names" id="names_list">
          <a href="javascript:void(0);"><span class="badge">1</span><li class="part1" id="1">Ashwin Nair</li></a>
           <a href="javascript:void(0);"><span class="badge">2</span><li class="part2" id="2">Anil Reddy</li></a>
           <a href="javascript:void(0);"><span class="badge">0</span><li class="part1" id="3">Chirag</li></a>
           <a href="javascript:void(0);"><span class="badge">0</span><li class="part2" id="4">Ashwin</li></a>
           <a href="javascript:void(0);"><span class="badge">0</span><li class="part1" id="15">Ashwin</li></a>
            <a href="javascript:void(0);"><span class="badge">0</span><li class="part2" id="16">Ashwin</li></a>
           <a href="javascript:void(0);"><span class="badge">5</span><li class="part1" id="17">Ashwin</li></a>
           <a href="javascript:void(0);"><span class="badge">6</span><li class="part2" id="18">Ashwin</li></a>
           <a href="javascript:void(0);"><span class="badge">1</span><li class="part1" id="19">Ashwin</li></a>
           <a href="javascript:void(0);"><span class="badge">2</span><li class="part2" id="188">Anil Reddy</li></a>
           <a href="javascript:void(0);"><span class="badge">0</span><li class="part1" id="111">Bhavesh</li></a>
           <a href="javascript:void(0);"><span class="badge">0</span><li class="part2" id="122">Ashwin</li></a>
           <a href="javascript:void(0);"><span class="badge">0</span><li class="part1" id="133">Ashwin</li></a>
            <a href="javascript:void(0);"><span class="badge">0</span><li class="part2" id="144">Ashwin</li></a>
           <a href="javascript:void(0);"><span class="badge">5</span><li class="part1" id="199">Ashwin</li></a>
           <a href="javascript:void(0);"><span class="badge">6</span><li class="part2" id="156">Ashwin</li></a>
           <a href="javascript:void(0);"><span class="badge">1</span><li class="part1" id="174">Ashwin</li></a>

         </ul>    
$(document).ready(function(){
      var a=0;
      var ac;
      var ac2;
        $(".names li").click(function(){
           var b=0;
            if(a==0)
            {
              var accc="#"+ac2;
     if(ac=='part2')
     {
    $(accc).css({

    "background": "#322f28",
    "color":"#fff",
    });
     }
     if(ac=='part1')
     {

      $(accc).css({

      "background": "#3e3b34",
      "color":"#fff",
    });
     }

              $(this).css({
                "background":"#d3b730",
                "color":"#000",
            });
              ac=$(this).attr('class');
              ac2=$(this).attr('id');
    a=1;
            }
            else{

    var accc="#"+ac2;
    //alert(accc);
     if(ac=='part2')
     {
    $(accc).css({

    "background": "#322f28",
    "color":"#fff",
    });
     }
     if(ac=='part1')
     {

      $(accc).css({

      "background": "#3e3b34",
      "color":"#fff",
    });
     }

     a=0;
    ac=$(this).attr('class');
    ac2=$(this).attr('id');
    $(this).css({
                "background":"#d3b730",
                "color":"#000",
            });

            }

        });

iPhone and WireShark

This worked for me:

Connect your iOS device by USB
$ rvictl -s UDID where UDID is the UDID of your device (located in XCode under Devices, shortcut to with ??2)
$ sudo launchctl list com.apple.rpmuxd
$ sudo tcpdump -n -t -i rvi0 -q tcp or $ sudo tcpdump -i rvi0 -n

If victl is not working install Xcode and the developer tools.

For more info see Remote Virtual Interface and for the original tutorial here's the Use Your Loaf blog post

IntelliJ - Convert a Java project/module into a Maven project/module

A visual for those that benefit from it.

After right-clicking the project name ("test" in this example), select "Add framework support" and check the "Maven" option.

Python: How to ignore an exception and proceed?

except Exception:
    pass

Python docs for the pass statement

$.focus() not working

Pro tip. If you want to turn on focus from the dev console then just open the console as a separate window from the options tab. The latest Firefox and Chrome supports this feature.

How do I wait until Task is finished in C#?

A clean example that answers the Title

string output = "Error";
Task task = Task.Factory.StartNew(() =>
{
    System.Threading.Thread.Sleep(2000);
    output = "Complete";
});

task.Wait();
Console.WriteLine(output);

How can I tell if a VARCHAR variable contains a substring?

The standard SQL way is to use like:

where @stringVar like '%thisstring%'

That is in a query statement. You can also do this in TSQL:

if @stringVar like '%thisstring%'

How can I use LTRIM/RTRIM to search and replace leading/trailing spaces?

I understand this question is for sql server 2012, but if the same scenario for SQL Server 2017 or SQL Azure you can use Trim directly as below:

UPDATE *tablename*
   SET *columnname* = trim(*columnname*);

How can I make robocopy silent in the command line except for progress?

I did it by using the following options:

/njh /njs /ndl /nc /ns

Note that the file name still displays, but that's fine for me.

For more information on robocopy, go to http://technet.microsoft.com/en-us/library/cc733145%28WS.10%29.aspx

How can I check if a value is of type Integer?

You should use the instanceof operator to determine if your value is Integer or not;

Object object = your_value;

if(object instanceof Integer) {

Integer integer = (Integer) object ;

} else {
 //your value isn't integer
}

ORA-28040: No matching authentication protocol exception

just install ojdbc-full, That contains the 12.1.0.1 release.

Why is vertical-align:text-top; not working in CSS

position:absolute;
top:0px; 
margin:5px;

Solved my problem.

In mocha testing while calling asynchronous function how to avoid the timeout Error: timeout of 2000ms exceeded

For me the problem was actually the describe function, which when provided an arrow function, causes mocha to miss the timeout, and behave not consistently. (Using ES6)

since no promise was rejected I was getting this error all the time for different tests that were failing inside the describe block

so this how it looks when not working properly:

describe('test', () => { 
 assert(...)
})

and this works using the anonymous function

describe('test', function() { 
 assert(...)
})

Hope it helps someone, my configuration for the above: (nodejs: 8.4.0, npm: 5.3.0, mocha: 3.3.0)

Can I automatically increment the file build version when using Visual Studio?

It is in your project properties under Publish

(~ http://screencast.com/t/Vj7rhqJO)

npm global path prefix

If you have linked the node packages using sudo command

Then go to the folder where node_modules are installed globally.

On Unix systems they are normally placed in /usr/local/lib/node or /usr/local/lib/node_modules when installed globally. If you set the NODE_PATH environment variable to this path, the modules can be found by node.

Windows XP - %USERPROFILE%\Application Data\npm\node_modules Windows 7 - %AppData%\npm\node_modules

and then run the command

ls -l

This will give the list of all global node_modules and you can easily see the linked node modules.

TypeError: Object of type 'bytes' is not JSON serializable

You are creating those bytes objects yourself:

item['title'] = [t.encode('utf-8') for t in title]
item['link'] = [l.encode('utf-8') for l in link]
item['desc'] = [d.encode('utf-8') for d in desc]
items.append(item)

Each of those t.encode(), l.encode() and d.encode() calls creates a bytes string. Do not do this, leave it to the JSON format to serialise these.

Next, you are making several other errors; you are encoding too much where there is no need to. Leave it to the json module and the standard file object returned by the open() call to handle encoding.

You also don't need to convert your items list to a dictionary; it'll already be an object that can be JSON encoded directly:

class W3SchoolPipeline(object):    
    def __init__(self):
        self.file = open('w3school_data_utf8.json', 'w', encoding='utf-8')

    def process_item(self, item, spider):
        line = json.dumps(item) + '\n'
        self.file.write(line)
        return item

I'm guessing you followed a tutorial that assumed Python 2, you are using Python 3 instead. I strongly suggest you find a different tutorial; not only is it written for an outdated version of Python, if it is advocating line.decode('unicode_escape') it is teaching some extremely bad habits that'll lead to hard-to-track bugs. I can recommend you look at Think Python, 2nd edition for a good, free, book on learning Python 3.

What does `unsigned` in MySQL mean and when to use it?

MySQL says:

All integer types can have an optional (nonstandard) attribute UNSIGNED. Unsigned type can be used to permit only nonnegative numbers in a column or when you need a larger upper numeric range for the column. For example, if an INT column is UNSIGNED, the size of the column's range is the same but its endpoints shift from -2147483648 and 2147483647 up to 0 and 4294967295.

When do I use it ?

Ask yourself this question: Will this field ever contain a negative value?
If the answer is no, then you want an UNSIGNED data type.

A common mistake is to use a primary key that is an auto-increment INT starting at zero, yet the type is SIGNED, in that case you’ll never touch any of the negative numbers and you are reducing the range of possible id's to half.

R command for setting working directory to source file location in Rstudio

In case you use UTF-8 encoding:

path <- rstudioapi::getActiveDocumentContext()$path
Encoding(path) <- "UTF-8"
setwd(dirname(path))

You need to install the package rstudioapi if you haven't done it yet.

conflicting types error when compiling c program using gcc

To answer a more generic case, this error is noticed when you pick a function name which is already used in some built in library. For e.g., select.

A simple method to know about it is while compiling the file, the compiler will indicate the previous declaration.

IndexOf function in T-SQL

I believe you want to use CHARINDEX. You can read about it here.

Difference between Hive internal tables and external tables?

In external tables, if you drop it, it deletes only schema of the table, table data exists in physical location. So to deleted the data use hadoop fs - rmr tablename . Managed table hive will have full control on tables. In external tables users will have control on it.

How do I change the string representation of a Python class?

This is not as easy as it seems, some core library functions don't work when only str is overwritten (checked with Python 2.7), see this thread for examples How to make a class JSON serializable Also, try this

import json

class A(unicode):
    def __str__(self):
        return 'a'
    def __unicode__(self):
        return u'a'
    def __repr__(self):
        return 'a'

a = A()
json.dumps(a)

produces

'""'

and not

'"a"'

as would be expected.

EDIT: answering mchicago's comment:

unicode does not have any attributes -- it is an immutable string, the value of which is hidden and not available from high-level Python code. The json module uses re for generating the string representation which seems to have access to this internal attribute. Here's a simple example to justify this:

b = A('b') print b

produces

'a'

while

json.dumps({'b': b})

produces

{"b": "b"}

so you see that the internal representation is used by some native libraries, probably for performance reasons.

See also this for more details: http://www.laurentluce.com/posts/python-string-objects-implementation/

Return the most recent record from ElasticSearch index

If you are using python elasticsearch5 module or curl:

make sure each document that gets inserted has
- a timestamp field that is type datetime
- and you are monotonically increasing the timestamp value for each document

from python you do

es = elasticsearch5.Elasticsearch('my_host:my_port')
es.search(
    index='my_index', 
    size=1,
    sort='my_timestamp:desc'
    )

If your documents are not inserted with any field that is of type datetime, then I don't believe you can get the N "most recent".

How to get client IP address using jQuery


<html lang="en">
<head>
    <title>Jquery - get ip address</title>
    <script type="text/javascript" src="//cdn.jsdelivr.net/jquery/1/jquery.min.js"></script>
</head>
<body>


<h1>Your Ip Address : <span class="ip"></span></h1>


<script type="text/javascript">
    $.getJSON("http://jsonip.com?callback=?", function (data) {
        $(".ip").text(data.ip);
    });
</script>


</body>
</html>

How to prevent a jQuery Ajax request from caching in Internet Explorer?

If you set unique parameters, then the cache does not work, for example:

$.ajax({
    url : "my_url",
    data : {
        'uniq_param' : (new Date()).getTime(),
        //other data
    }});

android:layout_height 50% of the screen size

best way is use

layout_height="0dp" layout_weight="0.5"

for example

<WebView
    android:id="@+id/wvHelp"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="0.5" />

<TextView
    android:id="@+id/txtTEMP"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="0.5"
    android:text="TextView" />

WebView,TextView have 50% of the screen height

Fastest way to determine if an integer's square root is an integer

The sqrt call is not perfectly accurate, as has been mentioned, but it's interesting and instructive that it doesn't blow away the other answers in terms of speed. After all, the sequence of assembly language instructions for a sqrt is tiny. Intel has a hardware instruction, which isn't used by Java I believe because it doesn't conform to IEEE.

So why is it slow? Because Java is actually calling a C routine through JNI, and it's actually slower to do so than to call a Java subroutine, which itself is slower than doing it inline. This is very annoying, and Java should have come up with a better solution, ie building in floating point library calls if necessary. Oh well.

In C++, I suspect all the complex alternatives would lose on speed, but I haven't checked them all. What I did, and what Java people will find usefull, is a simple hack, an extension of the special case testing suggested by A. Rex. Use a single long value as a bit array, which isn't bounds checked. That way, you have 64 bit boolean lookup.

typedef unsigned long long UVLONG
UVLONG pp1,pp2;

void init2() {
  for (int i = 0; i < 64; i++) {
    for (int j = 0; j < 64; j++)
      if (isPerfectSquare(i * 64 + j)) {
    pp1 |= (1 << j);
    pp2 |= (1 << i);
    break;
      }
   }
   cout << "pp1=" << pp1 << "," << pp2 << "\n";  
}


inline bool isPerfectSquare5(UVLONG x) {
  return pp1 & (1 << (x & 0x3F)) ? isPerfectSquare(x) : false;
}

The routine isPerfectSquare5 runs in about 1/3 the time on my core2 duo machine. I suspect that further tweaks along the same lines could reduce the time further on average, but every time you check, you are trading off more testing for more eliminating, so you can't go too much farther on that road.

Certainly, rather than having a separate test for negative, you could check the high 6 bits the same way.

Note that all I'm doing is eliminating possible squares, but when I have a potential case I have to call the original, inlined isPerfectSquare.

The init2 routine is called once to initialize the static values of pp1 and pp2. Note that in my implementation in C++, I'm using unsigned long long, so since you're signed, you'd have to use the >>> operator.

There is no intrinsic need to bounds check the array, but Java's optimizer has to figure this stuff out pretty quickly, so I don't blame them for that.

Downloading a file from spring controllers

With Spring 3.0 you can use the HttpEntity return object. If you use this, then your controller does not need a HttpServletResponse object, and therefore it is easier to test. Except this, this answer is relative equals to the one of Infeligo.

If the return value of your pdf framework is an byte array (read the second part of my answer for other return values) :

@RequestMapping(value = "/files/{fileName}", method = RequestMethod.GET)
public HttpEntity<byte[]> createPdf(
                 @PathVariable("fileName") String fileName) throws IOException {

    byte[] documentBody = this.pdfFramework.createPdf(filename);

    HttpHeaders header = new HttpHeaders();
    header.setContentType(MediaType.APPLICATION_PDF);
    header.set(HttpHeaders.CONTENT_DISPOSITION,
                   "attachment; filename=" + fileName.replace(" ", "_"));
    header.setContentLength(documentBody.length);

    return new HttpEntity<byte[]>(documentBody, header);
}

If the return type of your PDF Framework (documentBbody) is not already a byte array (and also no ByteArrayInputStream) then it would been wise NOT to make it a byte array first. Instead it is better to use:

example with FileSystemResource:

@RequestMapping(value = "/files/{fileName}", method = RequestMethod.GET)
public HttpEntity<byte[]> createPdf(
                 @PathVariable("fileName") String fileName) throws IOException {

    File document = this.pdfFramework.createPdf(filename);

    HttpHeaders header = new HttpHeaders();
    header.setContentType(MediaType.APPLICATION_PDF);
    header.set(HttpHeaders.CONTENT_DISPOSITION,
                   "attachment; filename=" + fileName.replace(" ", "_"));
    header.setContentLength(document.length());

    return new HttpEntity<byte[]>(new FileSystemResource(document),
                                  header);
}

Visual Studio displaying errors even if projects build

Occasionally I have to do a custom clean by going through all of the projects and manually deleting the "bin" and "obj" folders. To see them in Visual Studio, you'll have to enable hidden files and folders for each project. After this is done, rebuild the solution.

How to check if a variable is a dictionary in Python?

The OP did not exclude the starting variable, so for completeness here is how to handle the generic case of processing a supposed dictionary that may include items as dictionaries.

Also following the pure Python(3.8) recommended way to test for dictionary in the above comments.

from collections.abc import Mapping

dict = {'abc': 'abc', 'def': {'ghi': 'ghi', 'jkl': 'jkl'}}

def parse_dict(in_dict): 
    if isinstance(in_dict, Mapping):
        for k_outer, v_outer in in_dict.items():
            if isinstance(v_outer, Mapping):
                for k_inner, v_inner in v_outer.items():
                    print(k_inner, v_inner)
            else:
                print(k_outer, v_outer)

parse_dict(dict)

How do I convert an ANSI encoded file to UTF-8 with Notepad++?

Regarding this part:

When I convert it to UTF-8 without bom and close file, the file is again ANSI when I reopen.

The easiest solution is to avoid the problem entirely by properly configuring Notepad++.

Try Settings -> Preferences -> New document -> Encoding -> choose UTF-8 without BOM, and check Apply to opened ANSI files.

That way all the opened ANSI files will be treated as UTF-8 without BOM.

For explanation what's going on, read the comments below this answer.

To fully learn about Unicode and UTF-8, read this excellent article from Joel Spolsky.

Can you do greater than comparison on a date in a Rails 3 search?

If you hit problems where column names are ambiguous, you can do:

date_field = Note.arel_table[:date]
Note.where(user_id: current_user.id, notetype: p[:note_type]).
     where(date_field.gt(p[:date])).
     order(date_field.asc(), Note.arel_table[:created_at].asc())

Using wget to recursively fetch a directory with arbitrary files in it

For anyone else that having similar issues. Wget follows robots.txt which might not allow you to grab the site. No worries, you can turn it off:

wget -e robots=off http://www.example.com/

http://www.gnu.org/software/wget/manual/html_node/Robot-Exclusion.html

Can Keras with Tensorflow backend be forced to use CPU or GPU at will?

I just spent some time figure it out. Thoma's answer is not complete. Say your program is test.py, you want to use gpu0 to run this program, and keep other gpus free.

You should write CUDA_VISIBLE_DEVICES=0 python test.py

Notice it's DEVICES not DEVICE

XSLT getting last element

You need to put the last() indexing on the nodelist result, rather than as part of the selection criteria. Try:

(//element[@name='D'])[last()]

PHP: How do you determine every Nth iteration of a loop?

The easiest way is to use the modulus division operator.

if ($counter % 3 == 0) {
   echo 'image file';
}

How this works: Modulus division returns the remainder. The remainder is always equal to 0 when you are at an even multiple.

There is one catch: 0 % 3 is equal to 0. This could result in unexpected results if your counter starts at 0.

Failed to find target with hash string 'android-25'

the default gradle version 3.3 may have some bugs, I switched to gradle 3.5 and everything got ok

What does the 'L' in front a string mean in C++?

It means that it is a wide character, wchar_t.

Similar to 1L being a long value.

Pass Parameter to Gulp Task

Just load it into a new object on process .. process.gulp = {} and have the task look there.

Open Source HTML to PDF Renderer with Full CSS Support

I've always used it on the command line and not as a library, but HTMLDOC gives me excellent results, and it handles at least some CSS (I couldn't easily see how much).

Here's a sample command line

htmldoc --webpage -t pdf --size letter --fontsize 10pt index.html > index.pdf

Are all Spring Framework Java Configuration injection examples buggy?

In your test, you are comparing the two TestParent beans, not the single TestedChild bean.

Also, Spring proxies your @Configuration class so that when you call one of the @Bean annotated methods, it caches the result and always returns the same object on future calls.

See here:

How does Spring @Configuration cache references to beans

How to create a new img tag with JQuery, with the src and id from a JavaScript object?

For those who need the same feature in IE 8, this is how I solved the problem:

  var myImage = $('<img/>');

               myImage.attr('width', 300);
               myImage.attr('height', 300);
               myImage.attr('class', "groupMediaPhoto");
               myImage.attr('src', photoUrl);

I could not force IE8 to use object in constructor.

How to See the Contents of Windows library (*.lib)

LIB.EXE is the librarian for VS

http://msdn.microsoft.com/en-us/library/7ykb2k5f(VS.80).aspx

(like libtool on Unix)

How to get all options of a select using jQuery?

I don't know jQuery, but I do know that if you get the select element, it contains an 'options' object.

var myOpts = document.getElementById('yourselect').options;
alert(myOpts[0].value) //=> Value of the first option

How to remove "href" with Jquery?

Your title question and your example are completely different. I'll start by answering the title question:

$("a").removeAttr("href");

And as far as not requiring an href, the generally accepted way of doing this is:

<a href"#" onclick="doWork(); return false;">link</a>

The return false is necessary so that the href doesn't actually go anywhere.

jQuery: select an element's class and id at the same time?

How about this code?

$("a.save#country")

Printing one character at a time from a string, using the while loop

   # make a list out of text - ['h','e','l','l','o']
   text = list('hello') 

   while text:
       print text.pop()

In python empty object are evaluated as false. The .pop() removes and returns the last item on a list. And that's why it prints on reverse !

But can be fixed by using:

text.pop( 0 )

The value violated the integrity constraints for the column

It usually happens when Allow Nulls option is unchecked.

Solution:

Look at the name of the column for this error/warning.
Go to SSMS and find the table
Allow Null for that Column
Save the table
Rerun the SSIS

Try these steps. It worked for me.

See this link

Array vs. Object efficiency in JavaScript

It depends on usage. If the case is lookup objects is very faster.

Here is a Plunker example to test performance of array and object lookups.

https://plnkr.co/edit/n2expPWVmsdR3zmXvX4C?p=preview

You will see that; Looking up for 5.000 items in 5.000 length array collection, take over 3000 milisecons

However Looking up for 5.000 items in object has 5.000 properties, take only 2 or 3 milisecons

Also making object tree don't make huge difference

"Prevent saving changes that require the table to be re-created" negative effects

SQL Server drops and recreates the tables only if you:

Add a new column
Change the Allow Nulls setting for a column
Change the column order in the table
Change the column data type

Using ALTER is safer, as in case the metadata is lost while you re-create the table, your data will be lost.

How do I view an older version of an SVN file?

To directly answer the question of how to "get a copy of that file":

svn cat -r 666 file > file_r666

then you can view the newly created file_r666 with any viewer or comparison program, e.g.

kompare file_r666 file

nicely shows the differences.

I posted the answer because the accepted answer's commands do actually not give a copy of the file and because svn cat -r 666 file | vim does not work with my system (Vim: Error reading input, exiting...)

How to make an autocomplete TextBox in ASP.NET?

Try this: .aspx page

<td>  
<asp:TextBox ID="TextBox1" runat="server" AutoPostBack="True"OnTextChanged="TextBox1_TextChanged"></asp:TextBox>  
<asp:AutoCompleteExtender ServiceMethod="GetCompletionList" MinimumPrefixLength="1"  
   CompletionInterval="10" EnableCaching="false" CompletionSetCount="1" TargetControlID="TextBox1"  
   ID="AutoCompleteExtender1" runat="server" FirstRowSelected="false">  
      </asp:AutoCompleteExtender>

Now To auto populate from database :

public static List<string> GetCompletionList(string prefixText, int count)  
    {  
        return AutoFillProducts(prefixText);  

    }  

    private static List<string> AutoFillProducts(string prefixText)  
    {  
        using (SqlConnection con = new SqlConnection())  
        {  
            con.ConnectionString = ConfigurationManager.ConnectionStrings["Conn"].ConnectionString;  
            using (SqlCommand com = new SqlCommand())  
            {  
                com.CommandText = "select ProductName from ProdcutMaster where " + "ProductName like @Search + '%'";  
                com.Parameters.AddWithValue("@Search", prefixText);  
                com.Connection = con;  
                con.Open();  
                List<string> countryNames = new List<string>();  
                using (SqlDataReader sdr = com.ExecuteReader())  
                {  
                    while (sdr.Read())  
                    {  
                        countryNames.Add(sdr["ProductName"].ToString());  
                    }  
                }  
                con.Close();  
                return countryNames;  
            }  
        }  
    }

Now:create a stored Procedure that fetches the Product details depending on the selected product from the Auto Complete Text Box.

Create Procedure GetProductDet  
(  
@ProductName varchar(50)    
)  
as  
begin  
Select BrandName,warranty,Price from ProdcutMaster where ProductName=@ProductName  
End

Create a function name to get product details ::

private void GetProductMasterDet(string ProductName)  
    {  
        connection();  
        com = new SqlCommand("GetProductDet", con);  
        com.CommandType = CommandType.StoredProcedure;  
        com.Parameters.AddWithValue("@ProductName", ProductName);  
        SqlDataAdapter da = new SqlDataAdapter(com);  
        DataSet ds=new DataSet();  
        da.Fill(ds);  
        DataTable dt = ds.Tables[0];  
        con.Close();  
        //Binding TextBox From dataTable  
        txtbrandName.Text =dt.Rows[0]["BrandName"].ToString();  
        txtwarranty.Text = dt.Rows[0]["warranty"].ToString();  
        txtPrice.Text = dt.Rows[0]["Price"].ToString();   
    }

Auto post back should be true

<asp:TextBox ID="TextBox1" runat="server" AutoPostBack="True" OnTextChanged="TextBox1_TextChanged"></asp:TextBox>

Now, Just call this function

protected void TextBox1_TextChanged(object sender, EventArgs e)  
  {  
      //calling method and Passing Values  
      GetProductMasterDet(TextBox1.Text);  
  }

ActionController::InvalidAuthenticityToken

If you have done a rake rails:update or otherwise recently changed your config/initializers/session_store.rb, this may be a symptom of old cookies in the browser. Hopefully this is done in dev/test (it was for me), and you can just clear all browser cookies related to the domain in question.

If this is in production, and you changed key, consider changing it back to use the old cookies (<- just speculation).

how to automatically scroll down a html page?

You can use .scrollIntoView() for this. It will bring a specific element into the viewport.

Example:

document.getElementById( 'bottom' ).scrollIntoView();

Demo: http://jsfiddle.net/ThinkingStiff/DG8yR/

Script:

function top() {
    document.getElementById( 'top' ).scrollIntoView();    
};

function bottom() {
    document.getElementById( 'bottom' ).scrollIntoView();
    window.setTimeout( function () { top(); }, 2000 );
};

bottom();

HTML:

<div id="top">top</div>
<div id="bottom">bottom</div>

CSS:

#top {
    border: 1px solid black;
    height: 3000px;
}

#bottom {
    border: 1px solid red;
}

How Can I Download a File from EC2

Facebook Graph API v2.0+ - /me/friends returns empty, or only friends who also use my application

Try /me/taggable_friends?limit=5000 using your JavaScript code

try the Graph API:

https://graph.facebook.com/v2.3/user_id_here/taggable_friends?access_token=

Difference between parameter and argument

They are often used interchangeably in text, but in most standards the distinction is that an argument is an expression passed to a function, where a parameter is a reference declared in a function declaration.

Select second last element with css

Note: Posted this answer because OP later stated in comments that they need to select the last two elements, not just the second to last one.

The :nth-child CSS3 selector is in fact more capable than you ever imagined!

For example, this will select the last 2 elements of #container:

#container :nth-last-child(-n+2) {}

But this is just the beginning of a beautiful friendship.

:nth-child Browser Support

_x000D_

#container :nth-last-child(-n+2) {
  background-color: cyan;
}

_x000D_

<div id="container">
 <div>a</div>
 <div>b</div>
 <div>SELECT THIS</div>
 <div>SELECT THIS</div>
</div>

_x000D_

How to do one-liner if else statement?

As the comments mentioned, Go doesn't support ternary one liners. The shortest form I can think of is this:

var c int
if c = b; a > b {
    c = a
}

But please don't do that, it's not worth it and will only confuse people who read your code.

How to remove leading whitespace from each line in a file

Use:

sed -e **'s/^[ \t]*//'**  name_of_file_from_which_you_want_to_remove_space > 'name _file_where_you_want_to_store_output'

For example:

sed -e 's/^[ \t]*//'  file1.txt > output.txt

Note:

s/: Substitute command ~ replacement for pattern (^[ \t]*) on each addressed line

^[ \t]*: Search pattern ( ^ – start of the line; [ \t]* match one or more blank spaces including tab)

//: Replace (delete) all matched patterns

How to enable C++11/C++0x support in Eclipse CDT?

Neither the hack nor the cleaner version work for Indigo. The hack is ignored, and the required configuration options are missing. For no apparent reason, build started working after not working and not providing any useful reason why. At least from the command line, I get reproducible results.

SQLite UPSERT / UPDATE OR INSERT

Q&A Style

Well, after researching and fighting with the problem for hours, I found out that there are two ways to accomplish this, depending on the structure of your table and if you have foreign keys restrictions activated to maintain integrity. I'd like to share this in a clean format to save some time to the people that may be in my situation.

Option 1: You can afford deleting the row

In other words, you don't have foreign key, or if you have them, your SQLite engine is configured so that there no are integrity exceptions. The way to go is INSERT OR REPLACE. If you are trying to insert/update a player whose ID already exists, the SQLite engine will delete that row and insert the data you are providing. Now the question comes: what to do to keep the old ID associated?

Let's say we want to UPSERT with the data user_name='steven' and age=32.

Look at this code:

INSERT INTO players (id, name, age)

VALUES (
    coalesce((select id from players where user_name='steven'),
             (select max(id) from drawings) + 1),
    32)

The trick is in coalesce. It returns the id of the user 'steven' if any, and otherwise, it returns a new fresh id.

Option 2: You cannot afford deleting the row

After monkeying around with the previous solution, I realized that in my case that could end up destroying data, since this ID works as a foreign key for other table. Besides, I created the table with the clause ON DELETE CASCADE, which would mean that it'd delete data silently. Dangerous.

So, I first thought of a IF clause, but SQLite only has CASE. And this CASE can't be used (or at least I did not manage it) to perform one UPDATE query if EXISTS(select id from players where user_name='steven'), and INSERT if it didn't. No go.

And then, finally I used the brute force, with success. The logic is, for each UPSERT that you want to perform, first execute a INSERT OR IGNORE to make sure there is a row with our user, and then execute an UPDATE query with exactly the same data you tried to insert.

Same data as before: user_name='steven' and age=32.

-- make sure it exists
INSERT OR IGNORE INTO players (user_name, age) VALUES ('steven', 32); 

-- make sure it has the right data
UPDATE players SET user_name='steven', age=32 WHERE user_name='steven';

And that's all!

EDIT

As Andy has commented, trying to insert first and then update may lead to firing triggers more often than expected. This is not in my opinion a data safety issue, but it is true that firing unnecessary events makes little sense. Therefore, a improved solution would be:

-- Try to update any existing row
UPDATE players SET age=32 WHERE user_name='steven';

-- Make sure it exists
INSERT OR IGNORE INTO players (user_name, age) VALUES ('steven', 32);

Can my enums have friendly names?

Some great solutions have already been posted. When I encountered this problem, I wanted to go both ways: convert an enum into a description, and convert a string matching a description into an enum.

I have two variants, slow and fast. Both convert from enum to string and string to enum. My problem is that I have enums like this, where some elements need attributes and some don't. I don't want to put attributes on elements that don't need them. I have about a hundred of these total currently:

public enum POS
{   
    CC, //  Coordinating conjunction
    CD, //  Cardinal Number
    DT, //  Determiner
    EX, //  Existential there
    FW, //  Foreign Word
    IN, //  Preposision or subordinating conjunction
    JJ, //  Adjective
    [System.ComponentModel.Description("WP$")]
    WPDollar, //$   Possessive wh-pronoun
    WRB, //     Wh-adverb
    [System.ComponentModel.Description("#")]
    Hash,
    [System.ComponentModel.Description("$")]
    Dollar,
    [System.ComponentModel.Description("''")]
    DoubleTick,
    [System.ComponentModel.Description("(")]
    LeftParenth,
    [System.ComponentModel.Description(")")]
    RightParenth,
    [System.ComponentModel.Description(",")]
    Comma,
    [System.ComponentModel.Description(".")]
    Period,
    [System.ComponentModel.Description(":")]
    Colon,
    [System.ComponentModel.Description("``")]
    DoubleBackTick,
    };

The first method for dealing with this is slow, and is based on suggestions I saw here and around the net. It's slow because we are reflecting for every conversion:

using System;
using System.Collections.Generic;
namespace CustomExtensions
{

/// <summary>
/// uses extension methods to convert enums with hypens in their names to underscore and other variants
public static class EnumExtensions
{
    /// <summary>
    /// Gets the description string, if available. Otherwise returns the name of the enum field
    /// LthWrapper.POS.Dollar.GetString() yields "$", an impossible control character for enums
    /// </summary>
    /// <param name="value"></param>
    /// <returns></returns>
    public static string GetStringSlow(this Enum value)
    {
        Type type = value.GetType();
        string name = Enum.GetName(type, value);
        if (name != null)
        {
            System.Reflection.FieldInfo field = type.GetField(name);
            if (field != null)
            {
                System.ComponentModel.DescriptionAttribute attr =
                       Attribute.GetCustomAttribute(field,
                         typeof(System.ComponentModel.DescriptionAttribute)) as System.ComponentModel.DescriptionAttribute;
                if (attr != null)
                {
                    //return the description if we have it
                    name = attr.Description; 
                }
            }
        }
        return name;
    }

    /// <summary>
    /// Converts a string to an enum field using the string first; if that fails, tries to find a description
    /// attribute that matches. 
    /// "$".ToEnum<LthWrapper.POS>() yields POS.Dollar
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="value"></param>
    /// <returns></returns>
    public static T ToEnumSlow<T>(this string value) //, T defaultValue)
    {
        T theEnum = default(T);

        Type enumType = typeof(T);

        //check and see if the value is a non attribute value
        try
        {
            theEnum = (T)Enum.Parse(enumType, value);
        }
        catch (System.ArgumentException e)
        {
            bool found = false;
            foreach (T enumValue in Enum.GetValues(enumType))
            {
                System.Reflection.FieldInfo field = enumType.GetField(enumValue.ToString());

                System.ComponentModel.DescriptionAttribute attr =
                           Attribute.GetCustomAttribute(field,
                             typeof(System.ComponentModel.DescriptionAttribute)) as System.ComponentModel.DescriptionAttribute;

                if (attr != null && attr.Description.Equals(value))
                {
                    theEnum = enumValue;
                    found = true;
                    break;

                }
            }
            if( !found )
                throw new ArgumentException("Cannot convert " + value + " to " + enumType.ToString());
        }

        return theEnum;
    }
}
}

The problem with this is that you're doing reflection every time. I haven't measured the performance hit from doing so, but it seems alarming. Worse we are computing these expensive conversions repeatedly, without caching them.

Instead we can use a static constructor to populate some dictionaries with this conversion information, then just look up this information when needed. Apparently static classes (required for extension methods) can have constructors and fields :)

using System;
using System.Collections.Generic;
namespace CustomExtensions
{

/// <summary>
/// uses extension methods to convert enums with hypens in their names to underscore and other variants
/// I'm not sure this is a good idea. While it makes that section of the code much much nicer to maintain, it 
/// also incurs a performance hit via reflection. To circumvent this, I've added a dictionary so all the lookup can be done once at 
/// load time. It requires that all enums involved in this extension are in this assembly.
/// </summary>
public static class EnumExtensions
{
    //To avoid collisions, every Enum type has its own hash table
    private static readonly Dictionary<Type, Dictionary<object,string>> enumToStringDictionary = new Dictionary<Type,Dictionary<object,string>>();
    private static readonly Dictionary<Type, Dictionary<string, object>> stringToEnumDictionary = new Dictionary<Type, Dictionary<string, object>>();

    static EnumExtensions()
    {
        //let's collect the enums we care about
        List<Type> enumTypeList = new List<Type>();

        //probe this assembly for all enums
        System.Reflection.Assembly assembly = System.Reflection.Assembly.GetExecutingAssembly();
        Type[] exportedTypes = assembly.GetExportedTypes();

        foreach (Type type in exportedTypes)
        {
            if (type.IsEnum)
                enumTypeList.Add(type);
        }

        //for each enum in our list, populate the appropriate dictionaries
        foreach (Type type in enumTypeList)
        {
            //add dictionaries for this type
            EnumExtensions.enumToStringDictionary.Add(type, new Dictionary<object,string>() );
            EnumExtensions.stringToEnumDictionary.Add(type, new Dictionary<string,object>() );

            Array values = Enum.GetValues(type);

            //its ok to manipulate 'value' as object, since when we convert we're given the type to cast to
            foreach (object value in values)
            {
                System.Reflection.FieldInfo fieldInfo = type.GetField(value.ToString());

                //check for an attribute 
                System.ComponentModel.DescriptionAttribute attribute =
                       Attribute.GetCustomAttribute(fieldInfo,
                         typeof(System.ComponentModel.DescriptionAttribute)) as System.ComponentModel.DescriptionAttribute;

                //populate our dictionaries
                if (attribute != null)
                {
                    EnumExtensions.enumToStringDictionary[type].Add(value, attribute.Description);
                    EnumExtensions.stringToEnumDictionary[type].Add(attribute.Description, value);
                }
                else
                {
                    EnumExtensions.enumToStringDictionary[type].Add(value, value.ToString());
                    EnumExtensions.stringToEnumDictionary[type].Add(value.ToString(), value);
                }
            }
        }
    }

    public static string GetString(this Enum value)
    {
        Type type = value.GetType();
        string aString = EnumExtensions.enumToStringDictionary[type][value];
        return aString; 
    }

    public static T ToEnum<T>(this string value)
    {
        Type type = typeof(T);
        T theEnum = (T)EnumExtensions.stringToEnumDictionary[type][value];
        return theEnum;
    }
 }
}

Look how tight the conversion methods are now. The only flaw I can think of is that this requires all the converted enums to be in the current assembly. Also, I only bother with exported enums, but you could change that if you wish.

This is how to call the methods

 string x = LthWrapper.POS.Dollar.GetString();
 LthWrapper.POS y = "PRP$".ToEnum<LthWrapper.POS>();

How to show current time in JavaScript in the format HH:MM:SS?

Use this way:

var d = new Date();
localtime = d.toLocaleTimeString('en-US', { hour12: false });

Result: 18:56:31

How do you join on the same table, twice, in mysql?

you'd use another join, something along these lines:

SELECT toD.dom_url AS ToURL, 
    fromD.dom_url AS FromUrl, 
    rvw.*

FROM reviews AS rvw

LEFT JOIN domain AS toD 
    ON toD.Dom_ID = rvw.rev_dom_for

LEFT JOIN domain AS fromD 
    ON fromD.Dom_ID = rvw.rev_dom_from

EDIT:

All you're doing is joining in the table multiple times. Look at the query in the post: it selects the values from the Reviews tables (aliased as rvw), that table provides you 2 references to the Domain table (a FOR and a FROM).

At this point it's a simple matter to left join the Domain table to the Reviews table. Once (aliased as toD) for the FOR, and a second time (aliased as fromD) for the FROM.

Then in the SELECT list, you will select the DOM_URL fields from both LEFT JOINS of the DOMAIN table, referencing them by the table alias for each joined in reference to the Domains table, and alias them as the ToURL and FromUrl.

For more info about aliasing in SQL, read here.

How to configure Git post commit hook

As mentioned in "Polling must die: triggering Jenkins builds from a git hook", you can notify Jenkins of a new commit:

With the latest Git plugin 1.1.14 (that I just release now), you can now do this more >easily by simply executing the following command:
curl http://yourserver/jenkins/git/notifyCommit?url=<URL of the Git repository>
This will scan all the jobs that’s configured to check out the specified URL, and if they are also configured with polling, it’ll immediately trigger the polling (and if that finds a change worth a build, a build will be triggered in turn.)

This allows a script to remain the same when jobs come and go in Jenkins.
Or if you have multiple repositories under a single repository host application (such as Gitosis), you can share a single post-receive hook script with all the repositories. Finally, this URL doesn’t require authentication even for secured Jenkins, because the server doesn’t directly use anything that the client is sending. It runs polling to verify that there is a change, before it actually starts a build.

As mentioned here, make sure to use the right address for your Jenkins server:

since we're running Jenkins as standalone Webserver on port 8080 the URL should have been without the /jenkins, like this:
http://jenkins:8080/git/notifyCommit?url=git@gitserver:tools/common.git

To reinforce that last point, ptha adds in the comments:

It may be obvious, but I had issues with:
curl http://yourserver/jenkins/git/notifyCommit?url=<URL of the Git repository>. 
The url parameter should match exactly what you have in Repository URL of your Jenkins job.
When copying examples I left out the protocol, in our case ssh://, and it didn't work.

You can also use a simple post-receive hook like in "Push based builds using Jenkins and GIT"

#!/bin/bash
/usr/bin/curl --user USERNAME:PASS -s \

http://jenkinsci/job/PROJECTNAME/build?token=1qaz2wsx

Configure your Jenkins job to be able to “Trigger builds remotely” and use an authentication token (1qaz2wsx in this example).

However, this is a project-specific script, and the author mentions a way to generalize it.
The first solution is easier as it doesn't depend on authentication or a specific project.

I want to check in change set whether at least one java file is there the build should start.
Suppose the developers changed only XML files or property files, then the build should not start.

Basically, your build script can:

put a 'build' notes (see git notes) on the first call
on the subsequent calls, grab the list of commits between HEAD of your branch candidate for build and the commit referenced by the git notes 'build' (git show refs/notes/build): git diff --name-only SHA_build HEAD.
your script can parse that list and decide if it needs to go on with the build.
in any case, create/move your git notes 'build' to HEAD.

May 2016: cwhsu points out in the comments the following possible url:

you could just use curl --user USER:PWD http://JENKINS_SERVER/job/JOB_NAME/build?token=YOUR_TOKEN if you set trigger config in your item

June 2016, polaretto points out in the comments:

I wanted to add that with just a little of shell scripting you can avoid manual url configuration, especially if you have many repositories under a common directory.
For example I used these parameter expansions to get the repo name
repository=${PWD%/hooks}; 
repository=${repository##*/} 
and then use it like:
curl $JENKINS_URL/git/notifyCommit?url=$GIT_URL/$repository

How to return only 1 row if multiple duplicate rows and still return rows that are not duplicates?

If this is a SQL question, and I understand what you are asking, (it's not entirely clear), just add distinct to the query

   Select Distinct * From TempTable

Eclipse+Maven src/main/java not visible in src folder in Package Explorer

I have solved this issue by below steps:

Right click the Maven Project -> Build Path -> Configure Build Path In Order and Export tab, you can see the message like '2 build path entries are missing' Now select 'JRE System Library' and 'Maven Dependencies' checkbox Click OK Now you can see below in all type of Explorers (Package or Project or Navigator)

The equivalent of wrap_content and match_parent in flutter?

Use the widget Wrap.

For Column like behavior try:

  return Wrap(
          direction: Axis.vertical,
          spacing: 10,
          children: <Widget>[...],);

For Row like behavior try:

  return Wrap(
          direction: Axis.horizontal,
          spacing: 10,
          children: <Widget>[...],);

For more information: Wrap (Flutter Widget)

var functionName = function() {} vs function functionName() {}

I'm adding my own answer just because everyone else has covered the hoisting part thoroughly.

I've wondered about which way is better for a long while now, and thanks to http://jsperf.com now I know :)

enter image description here

Function declarations are faster, and that's what really matters in web dev right? ;)

PostgreSQL next value of the sequences?

Even if this can somehow be done it is a terrible idea since it would be possible to get a sequence that then gets used by another record!

A much better idea is to save the record and then retrieve the sequence afterwards.

How to extract the hostname portion of a URL in JavaScript

I know this is a bit late, but I made a clean little function with a little ES6 syntax

function getHost(href){
  return Object.assign(document.createElement('a'), { href }).host;
}

It could also be writen in ES5 like

function getHost(href){
  return Object.assign(document.createElement('a'), { href: href }).host;
}

Of course IE doesn't support Object.assign, but in my line of work, that doesn't matter.

In c, in bool, true == 1 and false == 0?

More accurately anything that is not 0 is true.

So 1 is true, but so is 2, 3 ... etc.

Load local HTML file in a C# WebBrowser

Windows 10 uwp application.

Try this:

webview.Navigate(new Uri("ms-appx-web:///index.html"));

How do I convert a calendar week into a date in Excel?

=(MOD(R[-1]C-1,100)*7+DATE(INT(R[-1]C/100+2000),1,1)-2)

yyww as the given week exp:week 51 year 2014 will be 1451

How to get html table td cell value by JavaScript?

Don't use in-line JavaScript, separate your behaviour from your data and it gets much easier to handle. I'd suggest the following:

var table = document.getElementById('tableID'),
    cells = table.getElementsByTagName('td');

for (var i=0,len=cells.length; i<len; i++){
    cells[i].onclick = function(){
        console.log(this.innerHTML);
        /* if you know it's going to be numeric:
        console.log(parseInt(this.innerHTML),10);
        */
    }
}

_x000D_

var table = document.getElementById('tableID'),_x000D_
  cells = table.getElementsByTagName('td');_x000D_
_x000D_
for (var i = 0, len = cells.length; i < len; i++) {_x000D_
  cells[i].onclick = function() {_x000D_
    console.log(this.innerHTML);_x000D_
  };_x000D_
}

_x000D_

th,_x000D_
td {_x000D_
  border: 1px solid #000;_x000D_
  padding: 0.2em 0.3em 0.1em 0.3em;_x000D_
}

_x000D_

<table id="tableID">_x000D_
  <thead>_x000D_
    <tr>_x000D_
      <th>Column heading 1</th>_x000D_
      <th>Column heading 2</th>_x000D_
      <th>Column heading 3</th>_x000D_
      <th>Column heading 4</th>_x000D_
    </tr>_x000D_
  </thead>_x000D_
  <tbody>_x000D_
    <tr>_x000D_
      <td>43</td>_x000D_
      <td>23</td>_x000D_
      <td>89</td>_x000D_
      <td>5</td>_x000D_
    </tr>_x000D_
    <tr>_x000D_
      <td>4</td>_x000D_
      <td>3</td>_x000D_
      <td>0</td>_x000D_
      <td>98</td>_x000D_
    </tr>_x000D_
    <tr>_x000D_
      <td>10</td>_x000D_
      <td>32</td>_x000D_
      <td>7</td>_x000D_
      <td>2</td>_x000D_
    </tr>_x000D_
  </tbody>_x000D_
</table>

_x000D_

JS Fiddle proof-of-concept.

A revised approach, in response to the comment (below):

You're missing a semicolon. Also, don't make functions within a loop.

This revision binds a (single) named function as the click event-handler of the multiple <td> elements, and avoids the unnecessary overhead of creating multiple anonymous functions within a loop (which is poor practice due to repetition and the impact on performance, due to memory usage):

function logText() {
  // 'this' is automatically passed to the named
  // function via the use of addEventListener()
  // (later):
  console.log(this.textContent);
}

// using a CSS Selector, with document.querySelectorAll()
// to get a NodeList of <td> elements within the #tableID element:
var cells = document.querySelectorAll('#tableID td');

// iterating over the array-like NodeList, using
// Array.prototype.forEach() and Function.prototype.call():
Array.prototype.forEach.call(cells, function(td) {
  // the first argument of the anonymous function (here: 'td')
  // is the element of the array over which we're iterating.

  // adding an event-handler (the function logText) to handle
  // the click events on the <td> elements:
  td.addEventListener('click', logText);
});

_x000D_

function logText() {_x000D_
  console.log(this.textContent);_x000D_
}_x000D_
_x000D_
var cells = document.querySelectorAll('#tableID td');_x000D_
_x000D_
Array.prototype.forEach.call(cells, function(td) {_x000D_
  td.addEventListener('click', logText);_x000D_
});

_x000D_

th,_x000D_
td {_x000D_
  border: 1px solid #000;_x000D_
  padding: 0.2em 0.3em 0.1em 0.3em;_x000D_
}

_x000D_

<table id="tableID">_x000D_
  <thead>_x000D_
    <tr>_x000D_
      <th>Column heading 1</th>_x000D_
      <th>Column heading 2</th>_x000D_
      <th>Column heading 3</th>_x000D_
      <th>Column heading 4</th>_x000D_
    </tr>_x000D_
  </thead>_x000D_
  <tbody>_x000D_
    <tr>_x000D_
      <td>43</td>_x000D_
      <td>23</td>_x000D_
      <td>89</td>_x000D_
      <td>5</td>_x000D_
    </tr>_x000D_
    <tr>_x000D_
      <td>4</td>_x000D_
      <td>3</td>_x000D_
      <td>0</td>_x000D_
      <td>98</td>_x000D_
    </tr>_x000D_
    <tr>_x000D_
      <td>10</td>_x000D_
      <td>32</td>_x000D_
      <td>7</td>_x000D_
      <td>2</td>_x000D_
    </tr>_x000D_
  </tbody>_x000D_
</table>

_x000D_

JS Fiddle proof-of-concept.

References:

To switch from vertical split to horizontal split fast in Vim

In VIM, take a look at the following to see different alternatives for what you might have done:

:help opening-window

For instance:

Ctrl-W s
Ctrl-W o
Ctrl-W v
Ctrl-W o
Ctrl-W s
...

Mockito verify order / sequence of method calls

InOrder helps you to do that.

ServiceClassA firstMock = mock(ServiceClassA.class);
ServiceClassB secondMock = mock(ServiceClassB.class);

Mockito.doNothing().when(firstMock).methodOne();   
Mockito.doNothing().when(secondMock).methodTwo();  

//create inOrder object passing any mocks that need to be verified in order
InOrder inOrder = inOrder(firstMock, secondMock);

//following will make sure that firstMock was called before secondMock
inOrder.verify(firstMock).methodOne();
inOrder.verify(secondMock).methodTwo();

Moving from one activity to another Activity in Android

public void onClick(View v)
{
 startActivity(new Intent(getApplicationContext(), Next.class));

}

it is direct way to move second activity and there is no need for call intent

how to change directory using Windows command line

The "cd" command changes the directory, but not what drive you are working with. So when you go "cd d:\temp", you are changing the D drive's directory to temp, but staying in the C drive.

Execute these two commands:

D:
cd temp

That will get you the results you want.

Getting the exception value in Python

Even though I realise this is an old question, I'd like to suggest using the traceback module to handle output of the exceptions.

Use traceback.print_exc() to print the current exception to standard error, just like it would be printed if it remained uncaught, or traceback.format_exc() to get the same output as a string. You can pass various arguments to either of those functions if you want to limit the output, or redirect the printing to a file-like object.

How to compare two columns in Excel (from different sheets) and copy values from a corresponding column if the first two columns match?

As kmcamara discovered, this is exactly the kind of problem that VLOOKUP is intended to solve, and using vlookup is arguably the simplest of the alternative ways to get the job done.

In addition to the three parameters for lookup_value, table_range to be searched, and the column_index for return values, VLOOKUP takes an optional fourth argument that the Excel documentation calls the "range_lookup".

Expanding on deathApril's explanation, if this argument is set to TRUE (or 1) or omitted, the table range must be sorted in ascending order of the values in the first column of the range for the function to return what would typically be understood to be the "correct" value. Under this default behavior, the function will return a value based upon an exact match, if one is found, or an approximate match if an exact match is not found.

If the match is approximate, the value that is returned by the function will be based on the next largest value that is less than the lookup_value. For example, if "12AT8003" were missing from the table in Sheet 1, the lookup formulas for that value in Sheet 2 would return '2', since "12AT8002" is the largest value in the lookup column of the table range that is less than "12AT8003". (VLOOKUP's default behavior makes perfect sense if, for example, the goal is to look up rates in a tax table.)

However, if the fourth argument is set to FALSE (or 0), VLOOKUP returns a looked-up value only if there is an exact match, and an error value of #N/A if there is not. It is now the usual practice to wrap an exact VLOOKUP in an IFERROR function in order to catch the no-match gracefully. Prior to the introduction of IFERROR, no matches were checked with an IF function using the VLOOKUP formula once to check whether there was a match, and once to return the actual match value.

Though initially harder to master, deusxmach1na's proposed solution is a variation on a powerful set of alternatives to VLOOKUP that can be used to return values for a column or list to the left of the lookup column, expanded to handle cases where an exact match on more than one criterion is needed, or modified to incorporate OR as well as AND match conditions among multiple criteria.

Repeating kcamara's chosen solution, the VLOOKUP formula for this problem would be:

   =VLOOKUP(A1,Sheet1!A$1:B$600,2,FALSE)

ArrayList initialization equivalent to array initialization

Here is the closest you can get:

ArrayList<String> list = new ArrayList(Arrays.asList("Ryan", "Julie", "Bob"));

You can go even simpler with:

List<String> list = Arrays.asList("Ryan", "Julie", "Bob")

Looking at the source for Arrays.asList, it constructs an ArrayList, but by default is cast to List. So you could do this (but not reliably for new JDKs):

ArrayList<String> list = (ArrayList<String>)Arrays.asList("Ryan", "Julie", "Bob")

Background Image for Select (dropdown) does not work in Chrome

What Arne said - you can't reliably style select boxes and have them look anything like consistent across browsers.

Uniform: https://github.com/pixelmatrix/uniform is a javascript solution which gives you good graphic control over your form elements - it's still Javascript, but it's about as nice as javascript gets for solving this problem.

Best method for reading newline delimited files and discarding the newlines?

I use this

def cleaned( aFile ):
    for line in aFile:
        yield line.strip()

Then I can do things like this.

lines = list( cleaned( open("file","r") ) )

Or, I can extend cleaned with extra functions to, for example, drop blank lines or skip comment lines or whatever.

How to scroll to bottom in a ScrollView on activity startup

 scrollView.postDelayed(new Runnable() {
        @Override
        public void run() {
            scrollView.fullScroll(ScrollView.FOCUS_DOWN);
        }
    },1000);

SimpleDateFormat parse loses timezone

tl;dr

what is the way to retrieve a Date object so that its always in GMT?

Instant.now()

Details

You are using troublesome confusing old date-time classes that are now supplanted by the java.time classes.

`Instant` = UTC

The Instant class represents a moment on the timeline in UTC with a resolution of nanoseconds (up to nine (9) digits of a decimal fraction).

Instant instant = Instant.now() ; // Current moment in UTC.

ISO 8601

To exchange this data as text, use the standard ISO 8601 formats exclusively. These formats are sensibly designed to be unambiguous, easy to process by machine, and easy to read across many cultures by people.

The java.time classes use the standard formats by default when parsing and generating strings.

String output = instant.toString() ;

2017-01-23T12:34:56.123456789Z

Time zone

If you want to see that same moment as presented in the wall-clock time of a particular region, apply a ZoneId to get a ZonedDateTime.

Specify a proper time zone name in the format of continent/region, such as America/Montreal, Africa/Casablanca, or Pacific/Auckland. Never use the 3-4 letter abbreviation such as EST or IST as they are not true time zones, not standardized, and not even unique(!).

ZoneId z = ZoneId.of( "Asia/Singapore" ) ;
ZonedDateTime zdt = instant.atZone( z ) ;  // Same simultaneous moment, same point on the timeline.

See this code live at IdeOne.com.

Notice the eight hour difference, as the time zone of Asia/Singapore currently has an offset-from-UTC of +08:00. Same moment, different wall-clock time.

instant.toString(): 2017-01-23T12:34:56.123456789Z

zdt.toString(): 2017-01-23T20:34:56.123456789+08:00[Asia/Singapore]

Convert

Avoid the legacy java.util.Date class. But if you must, you can convert. Look to new methods added to the old classes.

java.util.Date date = Date.from( instant ) ;

…going the other way…

Instant instant = myJavaUtilDate.toInstant() ;

Date-only

For date-only, use LocalDate.

LocalDate ld = zdt.toLocalDate() ;

About java.time

The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date, Calendar, & SimpleDateFormat.

The Joda-Time project, now in maintenance mode, advises migration to the java.time classes.

To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.

Where to obtain the java.time classes?

Java SE 8, Java SE 9, and later
- Built-in.
- Part of the standard Java API with a bundled implementation.
- Java 9 adds some minor features and fixes.
Java SE 6 and Java SE 7
- Much of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
Android
- The ThreeTenABP project adapts ThreeTen-Backport (mentioned above) for Android specifically.
- See How to use ThreeTenABP….

The ThreeTen-Extra project extends java.time with additional classes. This project is a proving ground for possible future additions to java.time. You may find some useful classes here such as Interval, YearWeek, YearQuarter, and more.

Java 32-bit vs 64-bit compatibility

The 32-bit vs 64-bit difference does become more important when you are interfacing with native libraries. 64-bit Java will not be able to interface with a 32-bit non-Java dll (via JNI)

Get a worksheet name using Excel VBA

This works for me.

worksheetName = ActiveSheet.Name

How to get query params from url in Angular 2?

By injecting an instance of ActivatedRoute one can subscribe to a variety of observables, including a queryParams and a params observable:

import {Router, ActivatedRoute, Params} from '@angular/router';
import {OnInit, Component} from '@angular/core';

@Component({...})
export class MyComponent implements OnInit {

  constructor(private activatedRoute: ActivatedRoute) {}

  ngOnInit() {
    // Note: Below 'queryParams' can be replaced with 'params' depending on your requirements
    this.activatedRoute.queryParams.subscribe(params => {
        const userId = params['userId'];
        console.log(userId);
      });
  }

}

A NOTE REGARDING UNSUBSCRIBING

@Reto and @codef0rmer had quite rightly pointed out that, as per the official docs, an unsubscribe() inside the components onDestroy() method is unnecessary in this instance. This has been removed from my code sample. (see blue alert box in this tutorial)

Hashing a dictionary?

EDIT: If all your keys are strings, then before continuing to read this answer, please see Jack O'Connor's significantly simpler (and faster) solution (which also works for hashing nested dictionaries).

Although an answer has been accepted, the title of the question is "Hashing a python dictionary", and the answer is incomplete as regards that title. (As regards the body of the question, the answer is complete.)

Nested Dictionaries

If one searches Stack Overflow for how to hash a dictionary, one might stumble upon this aptly titled question, and leave unsatisfied if one is attempting to hash multiply nested dictionaries. The answer above won't work in this case, and you'll have to implement some sort of recursive mechanism to retrieve the hash.

Here is one such mechanism:

import copy

def make_hash(o):

  """
  Makes a hash from a dictionary, list, tuple or set to any level, that contains
  only other hashable types (including any lists, tuples, sets, and
  dictionaries).
  """

  if isinstance(o, (set, tuple, list)):

    return tuple([make_hash(e) for e in o])    

  elif not isinstance(o, dict):

    return hash(o)

  new_o = copy.deepcopy(o)
  for k, v in new_o.items():
    new_o[k] = make_hash(v)

  return hash(tuple(frozenset(sorted(new_o.items()))))

Bonus: Hashing Objects and Classes

The hash() function works great when you hash classes or instances. However, here is one issue I found with hash, as regards objects:

class Foo(object): pass
foo = Foo()
print (hash(foo)) # 1209812346789
foo.a = 1
print (hash(foo)) # 1209812346789

The hash is the same, even after I've altered foo. This is because the identity of foo hasn't changed, so the hash is the same. If you want foo to hash differently depending on its current definition, the solution is to hash off whatever is actually changing. In this case, the __dict__ attribute:

class Foo(object): pass
foo = Foo()
print (make_hash(foo.__dict__)) # 1209812346789
foo.a = 1
print (make_hash(foo.__dict__)) # -78956430974785

Alas, when you attempt to do the same thing with the class itself:

print (make_hash(Foo.__dict__)) # TypeError: unhashable type: 'dict_proxy'

The class __dict__ property is not a normal dictionary:

print (type(Foo.__dict__)) # type <'dict_proxy'>

Here is a similar mechanism as previous that will handle classes appropriately:

import copy

DictProxyType = type(object.__dict__)

def make_hash(o):

  """
  Makes a hash from a dictionary, list, tuple or set to any level, that 
  contains only other hashable types (including any lists, tuples, sets, and
  dictionaries). In the case where other kinds of objects (like classes) need 
  to be hashed, pass in a collection of object attributes that are pertinent. 
  For example, a class can be hashed in this fashion:

    make_hash([cls.__dict__, cls.__name__])

  A function can be hashed like so:

    make_hash([fn.__dict__, fn.__code__])
  """

  if type(o) == DictProxyType:
    o2 = {}
    for k, v in o.items():
      if not k.startswith("__"):
        o2[k] = v
    o = o2  

  if isinstance(o, (set, tuple, list)):

    return tuple([make_hash(e) for e in o])    

  elif not isinstance(o, dict):

    return hash(o)

  new_o = copy.deepcopy(o)
  for k, v in new_o.items():
    new_o[k] = make_hash(v)

  return hash(tuple(frozenset(sorted(new_o.items()))))

You can use this to return a hash tuple of however many elements you'd like:

# -7666086133114527897
print (make_hash(func.__code__))

# (-7666086133114527897, 3527539)
print (make_hash([func.__code__, func.__dict__]))

# (-7666086133114527897, 3527539, -509551383349783210)
print (make_hash([func.__code__, func.__dict__, func.__name__]))

NOTE: all of the above code assumes Python 3.x. Did not test in earlier versions, although I assume make_hash() will work in, say, 2.7.2. As far as making the examples work, I do know that

func.__code__

should be replaced with

func.func_code

Changing the sign of a number in PHP?

function invertSign($value)
{
    return -$value;
}

What exactly is std::atomic?

Each instantiation and full specialization of std::atomic<> represents a type that different threads can simultaneously operate on (their instances), without raising undefined behavior:

Objects of atomic types are the only C++ objects that are free from data races; that is, if one thread writes to an atomic object while another thread reads from it, the behavior is well-defined.

In addition, accesses to atomic objects may establish inter-thread synchronization and order non-atomic memory accesses as specified by std::memory_order.

std::atomic<> wraps operations that, in pre-C++ 11 times, had to be performed using (for example) interlocked functions with MSVC or atomic bultins in case of GCC.

Also, std::atomic<> gives you more control by allowing various memory orders that specify synchronization and ordering constraints. If you want to read more about C++ 11 atomics and memory model, these links may be useful:

Note that, for typical use cases, you would probably use overloaded arithmetic operators or another set of them:

std::atomic<long> value(0);
value++; //This is an atomic op
value += 5; //And so is this

Because operator syntax does not allow you to specify the memory order, these operations will be performed with std::memory_order_seq_cst, as this is the default order for all atomic operations in C++ 11. It guarantees sequential consistency (total global ordering) between all atomic operations.

In some cases, however, this may not be required (and nothing comes for free), so you may want to use more explicit form:

std::atomic<long> value {0};
value.fetch_add(1, std::memory_order_relaxed); // Atomic, but there are no synchronization or ordering constraints
value.fetch_add(5, std::memory_order_release); // Atomic, performs 'release' operation

Now, your example:

a = a + 12;

will not evaluate to a single atomic op: it will result in a.load() (which is atomic itself), then addition between this value and 12 and a.store() (also atomic) of final result. As I noted earlier, std::memory_order_seq_cst will be used here.

However, if you write a += 12, it will be an atomic operation (as I noted before) and is roughly equivalent to a.fetch_add(12, std::memory_order_seq_cst).

As for your comment:

A regular int has atomic loads and stores. Whats the point of wrapping it with atomic<>?

Your statement is only true for architectures that provide such guarantee of atomicity for stores and/or loads. There are architectures that do not do this. Also, it is usually required that operations must be performed on word-/dword-aligned address to be atomic std::atomic<> is something that is guaranteed to be atomic on every platform, without additional requirements. Moreover, it allows you to write code like this:

void* sharedData = nullptr;
std::atomic<int> ready_flag = 0;

// Thread 1
void produce()
{
    sharedData = generateData();
    ready_flag.store(1, std::memory_order_release);
}

// Thread 2
void consume()
{
    while (ready_flag.load(std::memory_order_acquire) == 0)
    {
        std::this_thread::yield();
    }

    assert(sharedData != nullptr); // will never trigger
    processData(sharedData);
}

Note that assertion condition will always be true (and thus, will never trigger), so you can always be sure that data is ready after while loop exits. That is because:

store() to the flag is performed after sharedData is set (we assume that generateData() always returns something useful, in particular, never returns NULL) and uses std::memory_order_release order:

memory_order_release

A store operation with this memory order performs the release operation: no reads or writes in the current thread can be reordered after this store. All writes in the current thread are visible in other threads that acquire the same atomic variable

sharedData is used after while loop exits, and thus after load() from flag will return a non-zero value. load() uses std::memory_order_acquire order:

std::memory_order_acquire

A load operation with this memory order performs the acquire operation on the affected memory location: no reads or writes in the current thread can be reordered before this load. All writes in other threads that release the same atomic variable are visible in the current thread.

This gives you precise control over the synchronization and allows you to explicitly specify how your code may/may not/will/will not behave. This would not be possible if only guarantee was the atomicity itself. Especially when it comes to very interesting sync models like the release-consume ordering.

How to use View.OnTouchListener instead of onClick

for use sample touch listener just you need this code

@Override
public boolean onTouch(View view, MotionEvent motionEvent) {

    ClipData data = ClipData.newPlainText("", "");
    View.DragShadowBuilder shadowBuilder = new View.DragShadowBuilder(view);
    view.startDrag(data, shadowBuilder, null, 0);

    return true;
}

How to set date format in HTML date input tag?

I came up with a slightly different answer than anything above that I've read.

My solution uses a small bit of JavaScript and an html input.

The Date accepted by an input results in a String formatted as 'yyyy-mm-dd'. We can split it and place it properly as a new Date().

Here is basic HTML:

<form id="userForm">
    <input type="text" placeholder="1, 2, 3, 4, 5, 6" id="userNumbers" />
    <input type="date" id="userDate" />
    <input type="submit" value="Track" />
</form>

Here is basic JS:

let userDate = document.getElementById('userDate').value.split('-'),
    parsedDate = new Date((`${userDate[1]}-${userDate[2]}-${userDate[0]}`));

You can format the date any way you like. You can create a new Date() and grab all the info from there... or simply use 'userDate[]' to build your string.

Keep in mind, some ways that a date is entered into 'new Date()' produces an unexpected result. (ie - one day behind)

get dataframe row count based on conditions

In Pandas, I like to use the shape attribute to get number of rows.

df[df.A > 0].shape[0]

gives the number of rows matching the condition A > 0, as desired.

Tips for using Vim as a Java IDE?

Use vim. ^-^ (gVim, to be precise)

You'll have it all (with some plugins).

Btw, snippetsEmu is a nice tool for coding with useful snippets (like in TextMate). You can use (or modify) a pre-made package or make your own.

what is this value means 1.845E-07 in excel?

1.84E-07 is the exact value, represented using scientific notation, also known as exponential notation.

1.845E-07 is the same as 0.0000001845. Excel will display a number very close to 0 as 0, unless you modify the formatting of the cell to display more decimals.

C# however will get the actual value from the cell. The ToString method use the e-notation when converting small numbers to a string.

You can specify a format string if you don't want to use the e-notation.

Bootstrap 3 - Responsive mp4-video

using that code wil give you a responsive video player with full control

<div class="embed-responsive embed-responsive-16by9">
    <iframe class="embed-responsive-item" width="640" height="480" src="https://www.youtube-nocookie.com/embed/Lw_e0vF1IB4" frameborder="0" allowfullscreen></iframe>
</div>

Program to find largest and second largest number in array

The problem with your code is a logic problem (which is what most coding is about). If the largest number is first then it gets the second largest number wrong ... why?

Well, look at your logic for deciding on the second largest number. You first set it to be equal to the first element in the array and then you go through the array and change the index if the element is greater than the current second largest number (which will never be true because we already set it to be the largest number!).

To solve it you can special case this: check if the largest number was the first and if so then set it to the second element (and then special case the issue of someone asking to find the highest two elements in a one element array, without reading past the end of an array.)

I think the method given in chqrlie's answer to do this all in one pass is best. And logical too: write a program to find the largest number. Second largest number, well that's just the one which was previously the largest!

Argparse: Required arguments listed under "optional arguments"?

Building off of @Karl Rosaen

parser = argparse.ArgumentParser()
optional = parser._action_groups.pop() # Edited this line
required = parser.add_argument_group('required arguments')
# remove this line: optional = parser...
required.add_argument('--required_arg', required=True)
optional.add_argument('--optional_arg')
parser._action_groups.append(optional) # added this line
return parser.parse_args()

and this outputs:

usage: main.py [-h] [--required_arg REQUIRED_ARG]
           [--optional_arg OPTIONAL_ARG]

required arguments:
  --required_arg REQUIRED_ARG

optional arguments:
  -h, --help                    show this help message and exit
  --optional_arg OPTIONAL_ARG

Is it possible to use Java 8 for Android development?

Follow this link for new updates. Use Java 8 language features

Old Answer

As of Android N preview release Android support limited features of Java 8 see Java 8 Language Features

To start using these features, you need to download and set up Android Studio 2.1 and the Android N Preview SDK, which includes the required Jack toolchain and updated Android Plugin for Gradle. If you haven't yet installed the Android N Preview SDK, see Set Up to Develop for Android N.

Supported Java 8 Language Features and APIs

Android does not currently support all Java 8 language features. However, the following features are now available when developing apps targeting the Android N Preview:

Default and static interface methods

Lambda expressions (also available on API level 23 and lower)

Repeatable annotations

Method References (also available on API level 23 and lower)

There are some additional Java 8 features which Android support, you can see complete detail from Java 8 Language Features

Update

Note: The Android N bases its implementation of lambda expressions on anonymous classes. This approach allows them to be backwards compatible and executable on earlier versions of Android. To test lambda expressions on earlier versions, remember to go to your build.gradle file, and set compileSdkVersion and targetSdkVersion to 23 or lower.

Update 2

Now Android studio 3.0 stable release support Java 8 libraries and Java 8 language features (without the Jack compiler).

What's the difference between an id and a class?

id and class are two Global / Standard HTML attribute (The global attributes below can be used on any HTML element.)

class Specifies one or more classnames for an element (refers to a class in a style sheet)

id Specifies a unique id for an element

The id attributes gives an element document-wide unique identifier where the class attribute provides a way of classifying similar elements.

The id attribute value must be unique across the HTML page where class attribute can be reused where ever you want to apply the same properties

Update Row if it Exists Else Insert Logic with Entity Framework

Alternative for @LadislavMrnka answer. This if for Entity Framework 6.2.0.

If you have a specific DbSet and an item that needs to be either updated or created:

var name = getNameFromService();

var current = _dbContext.Names.Find(name.BusinessSystemId, name.NameNo);
if (current == null)
{
    _dbContext.Names.Add(name);
}
else
{
    _dbContext.Entry(current).CurrentValues.SetValues(name);
}
_dbContext.SaveChanges();

However this can also be used for a generic DbSet with a single primary key or a composite primary key.

var allNames = NameApiService.GetAllNames();
GenericAddOrUpdate(allNames, "BusinessSystemId", "NameNo");

public virtual void GenericAddOrUpdate<T>(IEnumerable<T> values, params string[] keyValues) where T : class
{
    foreach (var value in values)
    {
        try
        {
            var keyList = new List<object>();

            //Get key values from T entity based on keyValues property
            foreach (var keyValue in keyValues)
            {
                var propertyInfo = value.GetType().GetProperty(keyValue);
                var propertyValue = propertyInfo.GetValue(value);
                keyList.Add(propertyValue);
            }

            GenericAddOrUpdateDbSet(keyList, value);
            //Only use this when debugging to catch save exceptions
            //_dbContext.SaveChanges();
        }
        catch
        {
            throw;
        }
    }
    _dbContext.SaveChanges();
}

public virtual void GenericAddOrUpdateDbSet<T>(List<object> keyList, T value) where T : class
{
    //Get a DbSet of T type
    var someDbSet = Set(typeof(T));

    //Check if any value exists with the key values
    var current = someDbSet.Find(keyList.ToArray());
    if (current == null)
    {
        someDbSet.Add(value);
    }
    else
    {
        Entry(current).CurrentValues.SetValues(value);
    }
}

urllib and "SSL: CERTIFICATE_VERIFY_FAILED" Error

import requests
requests.packages.urllib3.disable_warnings()

import ssl

try:
    _create_unverified_https_context = ssl._create_unverified_context
except AttributeError:
    # Legacy Python that doesn't verify HTTPS certificates by default
    pass
else:
    # Handle target environment that doesn't support HTTPS verification
    ssl._create_default_https_context = _create_unverified_https_context

Taken from here https://gist.github.com/michaelrice/a6794a017e349fc65d01

Private pages for a private Github repo

So sad It's 2020 and we are not able to have private GithubPäges:

403 Forbidden You don't have permission to access /folder-name/ on this server

under etc/apache2/apache2.conf, you can find one or more blocks that describe the server directories and permissions

As an example, this is the default configuration

<Directory /var/www/>
   Options Indexes FollowSymLinks
   AllowOverride None
   Require all granted
</Directory>

you can replicate this but change the directory path /var/www/ with the new directory.

Finally, you need to restart the apache server, you can do that from a terminal with the command: sudo service apache2 restart

JSON.Net Self referencing loop detected

Sometimes you have loops becouse your type class have references to other classes and that classes have references to your type class, thus you have to select the parameters that you need exactly in the json string, like this code.

List<ROficina> oficinas = new List<ROficina>();
oficinas = /*list content*/;
var x = JsonConvert.SerializeObject(oficinas.Select(o => new
            {
                o.IdOficina,
                o.Nombre
            }));

What is the proper way to URL encode Unicode characters?

The general rule seems to be that browsers encode form responses according to the content-type of the page the form was served from. This is a guess that if the server sends us "text/xml; charset=iso-8859-1", then they expect responses back in the same format.

If you're just entering a URL in the URL bar, then the browser doesn't have a base page to work on and therefore just has to guess. So in this case it seems to be doing utf-8 all the time (since both your inputs produced three-octet form values).

The sad truth is that AFAIK there's no standard for what character set the values in a query string, or indeed any characters in the URL, should be interpreted as. At least in the case of values in the query string, there's no reason to suppose that they necessarily do correspond to characters.

It's a known problem that you have to tell your server framework which character set you expect the query string to be encoded as--- for instance, in Tomcat, you have to call request.setEncoding() (or some similar method) before you call any of the request.getParameter() methods. The dearth of documentation on this subject probably reflects the lack of awareness of the problem amongst many developers. (I regularly ask Java interviewees what the difference between a Reader and an InputStream is, and regularly get blank looks)

How to detect when facebook's FB.init is complete

Update on Jan 04, 2012

It seems like you can't just call FB-dependent methods (for example FB.getAuthResponse()) right after FB.init() like before, as FB.init() seems to be asynchronous now. Wrapping your code into FB.getLoginStatus() response seems to do the trick of detecting when API is fully ready:

window.fbAsyncInit = function() {
    FB.init({
        //...
    });

    FB.getLoginStatus(function(response){
        runFbInitCriticalCode(); 
    });

};

or if using fbEnsureInit() implementation from below:

window.fbAsyncInit = function() {
    FB.init({
        //...
    });

    FB.getLoginStatus(function(response){
        fbApiInit = true;
    });

};

Original Post:

If you want to just run some script when FB is initialized you can put some callback function inside fbAsyncInit:

  window.fbAsyncInit = function() {
    FB.init({
      appId  : '<?php echo $conf['fb']['appid']; ?>',
      status : true, // check login status
      cookie : true, // enable cookies to allow the server to access the session
      xfbml  : true  // parse XFBML
    });
    FB.Canvas.setAutoResize();

    runFbInitCriticalCode(); //function that contains FB init critical code
  };

If you want exact replacement of FB.ensureInit then you would have to write something on your own as there is no official replacement (big mistake imo). Here is what I use:

  window.fbAsyncInit = function() {
    FB.init({
      appId  : '<?php echo $conf['fb']['appid']; ?>',
      status : true, // check login status
      cookie : true, // enable cookies to allow the server to access the session
      xfbml  : true  // parse XFBML
    });
    FB.Canvas.setAutoResize();

    fbApiInit = true; //init flag
  };

  function fbEnsureInit(callback) {
        if(!window.fbApiInit) {
            setTimeout(function() {fbEnsureInit(callback);}, 50);
        } else {
            if(callback) {
                callback();
            }
        }
    }

Usage:

fbEnsureInit(function() {
    console.log("this will be run once FB is initialized");
});

How to copy a file from one directory to another using PHP?

You can copy and past this will help you

<?php
$file = '/test1/example.txt';
$newfile = '/test2/example.txt';
if(!copy($file,$newfile)){
    echo "failed to copy $file";
}
else{
    echo "copied $file into $newfile\n";
}
?>

Creating a 3D sphere in Opengl using Visual C++

Here's the code:

glPushMatrix();
glTranslatef(18,2,0);
glRotatef(angle, 0, 0, 0.7);
glColor3ub(0,255,255);
glutWireSphere(3,10,10);
glPopMatrix();

HTML: How to create a DIV with only vertical scroll-bars for long paragraphs?

For any case set overflow-x to hidden and I prefer to set max-height in order to limit the expansion of the height of the div. Your code should looks like this:

overflow-y: scroll;
overflow-x: hidden;
max-height: 450px;

jQuery looping .each() JSON key/value not working

Since you have an object, not a jQuery wrapper, you need to use a different variant of $.each()

$.each(json, function (key, data) {
    console.log(key)
    $.each(data, function (index, data) {
        console.log('index', data)
    })
})

Demo: Fiddle

How to use jQuery with TypeScript

UPDATE 2019:

Answer by David, is more accurate.

Typescript supports 3rd party vendor libraries, which do not use Typescript for library development, using DefinitelyTyped Repo.

You do need to declare jquery/$ in your Component, If tsLint is On for these types of Type Checkings.

For Eg.

declare var jquery: any;
declare var $: any;

ggplot2, change title size

+ theme(plot.title = element_text(size=22))

Here is the full set of things you can change in element_text:

element_text(family = NULL, face = NULL, colour = NULL, size = NULL,
  hjust = NULL, vjust = NULL, angle = NULL, lineheight = NULL,
  color = NULL)

Could not load file or assembly 'log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=692fbea5521e1304'

Ensure version for correct platform (32-bit or 64-bit) is installed. I faced same issue when installed 32-bit run-time on 64-bit machine. Installing correct one, i.e. 64-bit, resolved the issue.

How do I list all loaded assemblies?

Using Visual Studio

Attach a debugger to the process (e.g. start with debugging or Debug > Attach to process)
While debugging, show the Modules window (Debug > Windows > Modules)

This gives details about each assembly, app domain and has a few options to load symbols (i.e. pdb files that contain debug information).

Using Process Explorer

If you want an external tool you can use the Process Explorer (freeware, published by Microsoft)

Click on a process and it will show a list with all the assemblies used. The tool is pretty good as it shows other information such as file handles etc.

Programmatically

Check this SO question that explains how to do it.

Set Page Title using PHP

Move the data retrieval at the top of the script, and after that use:

<title>Ultan.me - <?php echo htmlspecialchars($title, ENT_QUOTES, 'UTF-8'); ?></title>

python: how to identify if a variable is an array or a scalar

Another alternative approach (use of class name property):

N = [2,3,5]
P = 5

type(N).__name__ == 'list'
True

type(P).__name__ == 'int'
True

type(N).__name__ in ('list', 'tuple')
True

No need to import anything.

Set attribute without value

The accepted answer doesn't create a name-only attribute anymore (as of September 2017).

You should use JQuery prop() method to create name-only attributes.

$(body).prop('data-body', true)

add id to dynamically created <div>

Use Jquery for append the value for creating dynamically

eg:

var user_image1='<img src="{@user_image}" class="img-thumbnail" alt="Thumbnail Image" 
style="width:125px; height:125px">';

$("#userphoto").append(user_image1.replace("{@user_image}","http://127.0.0.1:50075/webhdfs/v1/PATH/"+user_image+"?op=OPEN"));

HTML :

<div id="userphoto">

Django error - matching query does not exist

You can use this:

comment = Comment.objects.filter(pk=comment_id)

Convert byte slice to io.Reader

To get a type that implements io.Reader from a []byte slice, you can use bytes.NewReader in the bytes package:

r := bytes.NewReader(byteData)

This will return a value of type bytes.Reader which implements the io.Reader (and io.ReadSeeker) interface.

Don't worry about them not being the same "type". io.Reader is an interface and can be implemented by many different types. To learn a little bit more about interfaces in Go, read Effective Go: Interfaces and Types.

Regular expression to validate US phone numbers?

The easiest way to match both

^\([0-9]{3}\)[0-9]{3}-[0-9]{4}$

and

^[0-9]{3}-[0-9]{3}-[0-9]{4}$

is to use alternation ((...|...)): specify them as two mostly-separate options:

^(\([0-9]{3}\)|[0-9]{3}-)[0-9]{3}-[0-9]{4}$

By the way, when Americans put the area code in parentheses, we actually put a space after that; for example, I'd write (123) 123-1234, not (123)123-1234. So you might want to write:

^(\([0-9]{3}\) |[0-9]{3}-)[0-9]{3}-[0-9]{4}$

(Though it's probably best to explicitly demonstrate the format that you expect phone numbers to be in.)

Official way to ask jQuery wait for all images to load before executing something

My solution is similar to molokoloco. Written as jQuery function:

$.fn.waitForImages = function (callback) {
    var $img = $('img', this),
        totalImg = $img.length;

    var waitImgLoad = function () {
        totalImg--;
        if (!totalImg) {
            callback();
        }
    };

    $img.each(function () {
        if (this.complete) { 
            waitImgLoad();
        }
    })

    $img.load(waitImgLoad)
        .error(waitImgLoad);
};

example:

<div>
    <img src="img1.png"/>
    <img src="img2.png"/>
</div>
<script>
    $('div').waitForImages(function () {
        console.log('img loaded');
    });
</script>

Parsing query strings on Android

if (queryString != null)
{
    final String[] arrParameters = queryString.split("&");
    for (final String tempParameterString : arrParameters)
    {
        final String[] arrTempParameter = tempParameterString.split("=");
        if (arrTempParameter.length >= 2)
        {
            final String parameterKey = arrTempParameter[0];
            final String parameterValue = arrTempParameter[1];
            //do something with the parameters
        }
    }
}

Make copy of an array

You can also use Arrays.copyOfRange.

Example:

public static void main(String[] args) {
    int[] a = {1,2,3};
    int[] b = Arrays.copyOfRange(a, 0, a.length);
    a[0] = 5;
    System.out.println(Arrays.toString(a)); // [5,2,3]
    System.out.println(Arrays.toString(b)); // [1,2,3]
}

This method is similar to Arrays.copyOf, but it's more flexible. Both of them use System.arraycopy under the hood.

See:

How to get a Char from an ASCII Character Code in c#

Two options:

char c1 = '\u0001';
char c1 = (char) 1;

Visual Studio 2013 error MS8020 Build tools v140 cannot be found

That's the platform toolset for VS2015. You uninstalled it, therefore it is no longer available.

To change your Platform Toolset:

Right click your project, go to Properties.
Under Configuration Properties, go to General.
Change your Platform Toolset to one of the available ones.

jinja2.exceptions.TemplateNotFound error

You put your template in the wrong place. From the Flask docs:

Flask will look for templates in the templates folder. So if your application is a module, this folder is next to that module, if it’s a package it’s actually inside your package: See the docs for more information: http://flask.pocoo.org/docs/quickstart/#rendering-templates

How to deploy a war file in Tomcat 7

Manual steps - Windows

Copy the .war file (E.g.: prj.war) to %CATALINA_HOME%\webapps ( E.g.: C:\tomcat\webapps )
Run %CATALINA_HOME%\bin\startup.bat
Your .war file will be extracted automatically to a folder that has the same name (without extension) (E.g.: prj)
Go to %CATALINA_HOME%\conf\server.xml and take the port for the HTTP protocol. <Connector port="8080" ... />. The default value is 8080.
Access the following URL:

[<protocol>://]localhost:<port>/folder/resourceName

(E.g.: localhost:8080/folder/resourceName)

Don't try to access the URL without the resourceName because it won't work if there is no file like index.html, or if there is no url pattern like "/" or "/*" in web.xml.

The available main paths are here: [<protocol>://]localhost:<port>/manager/html (E.g.: http://localhost:8080/manager/html) and they have true on the "Running" column.

Using the UI manager:

Go to [<protocol>://]localhost:<port>/manager/html/ (usually localhost:8080/manager/html/)

This is also achievable from [<protocol>://]localhost:<port> > Manager App)

If you get:

403 Access Denied

go to %CATALINA_HOME%\conf\tomcat-users.xml and check that you have enabled a line like this:
```
<user username="tomcat" password="tomcat" roles="tomcat,role1,manager-gui"/>
```
In the Deploy section, WAR file to deploy subsection, click on Browse....
Select the .war file (E.g.: prj.war) > click on Deploy.
In the Applications section, you can see the name of your project (E.g.: prj).

How to get the second column from command output?

awk -F"|" '{gsub(/\"/,"|");print "\""$2"\""}' your_file

Angularjs Template Default Value if Binding Null / Undefined (With Filter)

I made the following filter:

angular.module('app').filter('ifEmpty', function() {
    return function(input, defaultValue) {
        if (angular.isUndefined(input) || input === null || input === '') {
            return defaultValue;
        }

        return input;
    }
});

To be used like this:

<span>{{aPrice | currency | ifEmpty:'N/A'}}</span>
<span>{{aNum | number:3 | ifEmpty:0}}</span>

Copy file from source directory to binary directory using CMake

both option are valid and targeting two different steps of your build:

file(COPY ... copies the file in configuration step and only in this step. When you rebuild your project without having changed your cmake configuration, this command won't be executed.
add_custom_command is the preferred choice when you want to copy the file around on each build step.

The right version for your task would be:

add_custom_command(
        TARGET foo POST_BUILD
        COMMAND ${CMAKE_COMMAND} -E copy
                ${CMAKE_SOURCE_DIR}/test/input.txt
                ${CMAKE_CURRENT_BINARY_DIR}/input.txt)

you can choose between PRE_BUILD, PRE_LINK, POST_BUILD best is you read the documentation of add_custom_command

an example on how to use the first version can be found here: Use CMake add_custom_command to generate source for another target

How to remove all subviews of a view in Swift?

I wrote this extension:

extension UIView {
    func lf_removeAllSubviews() {
        for view in self.subviews {
            view.removeFromSuperview()
        }
    }
}

So that you can use self.view.lf_removeAllSubviews in a UIViewController. I'll put this in the swift version of my https://github.com/superarts/LFramework later, when I have more experience in swift (1 day exp so far, and yes, for API I gave up underscore).

Can't install gems on OS X "El Capitan"

sudo chown -R $(whoami):admin /usr/local

That will give permissions back (Homebrew installs ruby there)

scrollIntoView Scrolls just too far

Fix it in 20 seconds:

This solution belongs to @Arseniy-II, I have just simplified it into a function.

function _scrollTo(selector, yOffset = 0){
  const el = document.querySelector(selector);
  const y = el.getBoundingClientRect().top + window.pageYOffset + yOffset;

  window.scrollTo({top: y, behavior: 'smooth'});
}

Usage (you can open up the console right here in StackOverflow and test it out):

_scrollTo('#question-header', 0);

I'm currently using this in production and it is working just fine.

jQuery UI Datepicker - Multiple Date Selections

<div id="calendar"></div>
<script>
$(document).ready(function() {
    var days = [];

    $('#calendar').datepicker({
        dateFormat: 'yymmdd',
        showWeek: true, showOtherMonths: false, selectOtherMonths: false,
        navigationAsDateFormat: true, prevText: 'MM', nextText: 'MM',
        onSelect: function(d) {
            var i = $.inArray(d, days);

            if (i == -1)
                days.push(d);
            else
                days.splice(i, 1);
        },
        beforeShowDay: function(d) {
            return ([true, $.inArray($.datepicker.formatDate('yymmdd', d), days) == -1 ? 'ui-state-free' : 'ui-state-busy']);
        }
    });
});
</script>

NOTE: You can prefill days with a list of dates like '20190101' with a piece of code in PHP.

Add 2 lines to your CSS:

#calendar .ui-state-busy a {background:#e6e6e6 !important;}
#calendar .ui-state-free a {background:none !important;}

To get the list of days selected by the calendar in a <form>:

<div id="calendar"></div>
<form method="post">
<input type="submit" name="calendar_get" id="calendar_get" value="Validate" />
</form>

Add this to the <script>:

    $('#calendar_get').click(function() {
        $(this).append('<input type="hidden" name="calendar_days" value="' + days.join(',') + '" />');
    });

Apply implode on the string in $_POST['calendar_days'] and map strtotime to all the formatted dates.

Can I convert long to int?

Just do (int)myLongValue. It'll do exactly what you want (discarding MSBs and taking LSBs) in unchecked context (which is the compiler default). It'll throw OverflowException in checked context if the value doesn't fit in an int:

int myIntValue = unchecked((int)myLongValue);

Math.random() versus Random.nextInt(int)

Here is the detailed explanation of why "Random.nextInt(n) is both more efficient and less biased than Math.random() * n" from the Sun forums post that Gili linked to:

Math.random() uses Random.nextDouble() internally.

Random.nextDouble() uses Random.next() twice to generate a double that has approximately uniformly distributed bits in its mantissa, so it is uniformly distributed in the range 0 to 1-(2^-53).

Random.nextInt(n) uses Random.next() less than twice on average- it uses it once, and if the value obtained is above the highest multiple of n below MAX_INT it tries again, otherwise is returns the value modulo n (this prevents the values above the highest multiple of n below MAX_INT skewing the distribution), so returning a value which is uniformly distributed in the range 0 to n-1.

Prior to scaling by 6, the output of Math.random() is one of 2^53 possible values drawn from a uniform distribution.

Scaling by 6 doesn't alter the number of possible values, and casting to an int then forces these values into one of six 'buckets' (0, 1, 2, 3, 4, 5), each bucket corresponding to ranges encompassing either 1501199875790165 or 1501199875790166 of the possible values (as 6 is not a disvisor of 2^53). This means that for a sufficient number of dice rolls (or a die with a sufficiently large number of sides), the die will show itself to be biased towards the larger buckets.

You will be waiting a very long time rolling dice for this effect to show up.

Math.random() also requires about twice the processing and is subject to synchronization.

How to change the integrated terminal in visual studio code or VSCode

It is possible to get this working in VS Code and have the Cmder terminal be integrated (not pop up).

To do so:

Create an environment variable "CMDER_ROOT" pointing to your Cmder directory.
In (Preferences > User Settings) in VS Code add the following settings:

"terminal.integrated.shell.windows": "cmd.exe"

"terminal.integrated.shellArgs.windows": ["/k", "%CMDER_ROOT%\\vendor\\init.bat"]

How can I get a list of all values in select box?

You had two problems:

1) The order in which you included the HTML. Try changing the dropdown from "onLoad" to "no wrap - head" in the JavaScript settings of your fiddle.

2) Your function prints the values. What you're actually after is the text

x.options[i].text; instead of x.options[i].value;

http://jsfiddle.net/WfBRr/5/

Using android.support.v7.widget.CardView in my project (Eclipse)

Although a bit hidden it's in the official docs here where can the library be found among the sdk's code, and how to get it with resources (the Eclipse way)

Convert Long into Integer

Integer i = theLong != null ? theLong.intValue() : null;

or if you don't need to worry about null:

// auto-unboxing does not go from Long to int directly, so
Integer i = (int) (long) theLong;

And in both situations, you might run into overflows (because a Long can store a wider range than an Integer).

Java 8 has a helper method that checks for overflow (you get an exception in that case):

Integer i = theLong == null ? null : Math.toIntExact(theLong);

isset PHP isset($_GET['something']) ? $_GET['something'] : ''

That's called a ternary operator and it's mainly used in place of an if-else statement.

In the example you gave it can be used to retrieve a value from an array given isset returns true

isset($_GET['something']) ? $_GET['something'] : ''

is equivalent to

if (isset($_GET['something'])) {
  $_GET['something'];
} else {
  '';
}

Of course it's not much use unless you assign it to something, and possibly even assign a default value for a user submitted value.

$username = isset($_GET['username']) ? $_GET['username'] : 'anonymous'

How do I pull my project from github?

You Can do by Two ways,

1. Cloning the Remote Repo to your Local host

example: git clone https://github.com/user-name/repository.git

2. Pulling the Remote Repo to your Local host

First you have to create a git local repo by,

example: git init or git init repo-name then, git pull https://github.com/user-name/repository.git

That's all, All commits and branch in the remote repo now available in the local repository of your computer.

Happy Coding, cheers -:)

How can I get enum possible values in a MySQL database?

To fetch the list of possible values has been well documented, but expanding on another answer that returned the values in parenthesis, I wanted to strip them out leaving me with a comma separated list that would then allow me to use an explode type function whenever I needed to get an array.

SELECT
    SUBSTRING(COLUMN_TYPE, 6, LENGTH(COLUMN_TYPE) - 6) AS val
FROM
    information_schema.COLUMNS
WHERE
    TABLE_NAME = 'articles'
AND
    COLUMN_NAME = 'status'

The SUBSTRING now starts at the 6th character and uses a length which is 6 characters shorter than the total, removing the trailing parenthesis.

Force decimal point instead of comma in HTML5 number input (client-side)

Currently, Firefox honors the language of the HTML element in which the input resides. For example, try this fiddle in Firefox:

http://jsfiddle.net/ashraf_sabry_m/yzzhop75/1/

You will see that the numerals are in Arabic, and the comma is used as the decimal separator, which is the case with Arabic. This is because the BODY tag is given the attribute lang="ar-EG".

Next, try this one:

http://jsfiddle.net/ashraf_sabry_m/yzzhop75/2/

This one is displayed with a dot as the decimal separator because the input is wrapped in a DIV given the attribute lang="en-US".

So, a solution you may resort to is to wrap your numeric inputs with a container element that is set to use a culture that uses dots as the decimal separator.

What's the difference between import java.util.*; and import java.util.Date; ?

Your program should work exactly the same with either import java.util.*; or import java.util.Date;. There has to be something else you did in between.

Is HTML considered a programming language?

YES, a declarative programming language.

You really want to list the most important things you know that are relative to the job you're applying for on your resume. If you list ASP.NET but don't list HTML, even though it's somewhat obvious, there are a lot of managers and/or HR types that will assume you don't know HTML since it's not listed. I've had it happen to me before.

Update - Some say no it isn't a programming language, and you may not agree with me on this, but regardless on a resume it IS a programming language. You get HR types looking at your resume before the hiring manager even sees it. If the manager says you need to know HTML, and it's not listed in the 'programming languages' section then the HR person may disregard you resume thinking you don't know it because it's not listed.

Update 6-8-2012: Any instruction that tells the computer to do something is a programming language. So even after all these years, I still stand by my answer. HTML is a programming language. Something that isn't a programming language would be XML.

Tensorflow installation error: not a supported wheel on this platform

I was trying to install CPU TF on Ubuntu 18.04, and the best way (for me...) I found for it was using it on top of Conda, for that:

To create Conda ‘tensorflow’ env. Follow https://linuxize.com/post/how-to-install-anaconda-on-ubuntu-18-04/
After all installed see https://conda.io/projects/conda/en/latest/user-guide/getting-started.html And use it according to https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html#managing-environments
conda create --name tensorflow
source activate tensorflow
pip install --upgrade pip
pip uninstall tensorflow
For CPU: pip install tensorflow-cpu, for GPU: pip install tensorflow
pip install --ignore-installed --upgrade tensorflow
Test TF E.g. on 'Where' with:

python

import tensorflow as tf

tf.where([[True, False], [False, True]])

expected result:

<tf.Tensor: shape=(2, 2), dtype=int64, numpy=
array([[0, 0],
       [1, 1]])>

After Conda upgrade I got: DeprecationWarning: 'source deactivate' is deprecated. Use 'conda deactivate'.

So you should use:

‘conda activate tensorflow’ / ‘conda deactivate’

What is the difference between JVM, JDK, JRE & OpenJDK?

JVM : A specification which describes the the way/resources to run a java program. Actually executes the byte code and make java platform independent. In doing so, it is different for different platform. JVM for windows cannot work as JVM for UNIX.

JRE : Implementation of JVM. (JVM + run time libraries)

JDK : JRE + java compiler and other essential tools to build a java program from scratch

Declare variable MySQL trigger

All DECLAREs need to be at the top. ie.

delimiter //

CREATE TRIGGER pgl_new_user 
AFTER INSERT ON users FOR EACH ROW
BEGIN
    DECLARE m_user_team_id integer;
    DECLARE m_projects_id integer;
    DECLARE cur CURSOR FOR SELECT project_id FROM user_team_project_relationships WHERE user_team_id = m_user_team_id;

    SET @m_user_team_id := (SELECT id FROM user_teams WHERE name = "pgl_reporters");

    OPEN cur;
        ins_loop: LOOP
            FETCH cur INTO m_projects_id;
            IF done THEN
                LEAVE ins_loop;
            END IF;
            INSERT INTO users_projects (user_id, project_id, created_at, updated_at, project_access) 
            VALUES (NEW.id, m_projects_id, now(), now(), 20);
        END LOOP;
    CLOSE cur;
END//

Save current directory in variable using Bash?

for a relative answer, use .

test with:

$ myDir=.
$ ls $myDir
$ cd /
$ ls $myDir

The first ls will show you everything in the current directory, the second will show you everything in the root directory (/).

Javascript logical "!==" operator?

Copied from the formal specification: ECMAScript 5.1 section 11.9.5

11.9.4 The Strict Equals Operator ( === )

The production EqualityExpression : EqualityExpression === RelationalExpression is evaluated as follows:

Let lref be the result of evaluating EqualityExpression.

Let lval be GetValue(lref).

Let rref be the result of evaluating RelationalExpression.

Let rval be GetValue(rref).

Return the result of performing the strict equality comparison rval === lval. (See 11.9.6)

11.9.5 The Strict Does-not-equal Operator ( !== )

The production EqualityExpression : EqualityExpression !== RelationalExpression is evaluated as follows:

Let lref be the result of evaluating EqualityExpression.

Let lval be GetValue(lref).

Let rref be the result of evaluating RelationalExpression.

Let rval be GetValue(rref). Let r be the result of performing strict equality comparison rval === lval. (See 11.9.6)

If r is true, return false. Otherwise, return true.

11.9.6 The Strict Equality Comparison Algorithm

The comparison x === y, where x and y are values, produces true or false. Such a comparison is performed as follows:

If Type(x) is different from Type(y), return false.

Type(x) is Undefined, return true.

Type(x) is Null, return true.

Type(x) is Number, then

If x is NaN, return false.

If y is NaN, return false.

If x is the same Number value as y, return true.

If x is +0 and y is -0, return true.

If x is -0 and y is +0, return true.

Return false.

If Type(x) is String, then return true if x and y are exactly the same sequence of characters (same length and same characters in corresponding positions); otherwise, return false.

If Type(x) is Boolean, return true if x and y are both true or both false; otherwise, return false.

Return true if x and y refer to the same object. Otherwise, return false.

Getting Textarea Value with jQuery

try this:

<a id="send-thoughts" href="">Click</a>
<textarea id="message"></textarea>
<!--<textarea id="#message"></textarea>-->

            jQuery("a#send-thoughts").click(function() {
                //var thought = jQuery("textarea#message").val();
                var thought = $("#message").val();
                alert(thought);
            });

Programs & Examples On #Position

Using jquery to get element's position relative to viewport

Get position/offset of element relative to a parent container?

How to find index of STRING array in Java from a given value?

SVG Positioning

How to position three divs in html horizontally?

React Native absolute positioning horizontal centre

Using Position Relative/Absolute within a TD?

Fixed position but relative to container

Get max and min value from array in JavaScript

How to get mouse position in jQuery without mouse-events?

css absolute position won't work with margin-left:auto margin-right: auto

Iframe positioning

How does the "position: sticky;" property work?

Set The Window Position of an application via command line

Float right and position absolute doesn't work together

How do I get the coordinate position after using jQuery drag and drop?

Check if element is visible on screen

Retrieve the position (X,Y) of an HTML element relative to the browser window

How to set JFrame to appear centered, regardless of monitor resolution?

Make absolute positioned div expand parent div height

How to position the div popup dialog to the center of browser screen?

scrollTop jquery, scrolling to div with id?

Float a DIV on top of another DIV

Display Images Inline via CSS

How to overlay one div over another div

RecyclerView - Get view at particular position

Logo image and H1 heading on the same line

How to position the Button exactly in CSS

How to set iPhone UIView z index?

In Interface Builder

In Swift

HTML CSS Button Positioning

rotate image with css

Position: absolute and parent height?

RecyclerView - How to smooth scroll to top of item on a certain position?

c# datatable insert column at position 0

Set the absolute position of a view

Center a 'div' in the middle of the screen, even when the page is scrolled up or down?

css - position div to bottom of containing div

Insert node at a certain position in a linked list C++

jQuery UI dialog box not positioned center screen

Google Chrome default opening position and size

CSS: Position loading indicator in the center of the screen

Slide right to left?

Android ListView Divider

How can I get the root domain URI in ASP.NET?

How to Run a jQuery or JavaScript Before Page Start to Load

Change bootstrap navbar background color and font color

Get UIScrollView to scroll to the top

jQuery: How to get to a particular child of a parent?

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

Why doesn't java.io.File have a close method?

How to properly use unit-testing's assertRaises() with NoneType objects?

error LNK2038: mismatch detected for '_MSC_VER': value '1600' doesn't match value '1700' in CppFile1.obj

Git - How to fix "corrupted" interactive rebase?

Response Content type as CSV

What is ADT? (Abstract Data Type)

How to use foreach with a hash reference?

python : list index out of range error while iteratively popping elements

WARNING: Setting property 'source' to 'org.eclipse.jst.jee.server:appname' did not find a matching property

Python error message io.UnsupportedOperation: not readable

Use a+ to open a file for reading, writing as well as create it if it doesn't exist.

Newline in JLabel

Java string split with "." (dot)

Get commit list between tags in git

jQuery and AJAX response header

Visual Studio build fails: unable to copy exe-file from obj\debug to bin\debug

How to fire a change event on a HTMLSelectElement if the new value is the same as the old?

MySQL - UPDATE query with LIMIT

How to run specific test cases in GoogleTest

On the console

On the environment

On the code

How do I dynamically set HTML5 data- attributes using react?

Removing double quotes from a string in Java

Add & delete view from Layout

How can I make a jQuery UI 'draggable()' div draggable for touchscreen?

CSS force new line

Angular 4 - get input value

Use `a+` to open a file for reading, writing as well as create it if it doesn't exist.