Use this CSS3 [attribute selector](http://www.w3.org/TR/css3-selectors/#attribute-substrings):

    img[src*=&quot;hideme&quot;] {
        display: none;
    }

I&#39;d prefer to use a `hideme` class instead, but if you must hide an image based on its `src` attribute, the above is fine.

I have a class that benefits from the use of constants in its internal implementation, but I would like to limit visibility of these constants. Why doesn&#39;t PHP permit private constants?  Is there another way to achieve this or is PHP trying to discourage some type of design misstep I am ignorant of?

Why doesn&#39;t PHP permit private const?

How can I find whether a particular package or application, say: `com.android.abc`, exists on my Android device?


How can I find if a particular package exists on my Android device?

Is it possible to create a CSS rule that would apply a style to any IMG tag with a SRC that contained a specific string, say &quot;hideme&quot;?  For instance, if I had the following 3 images on a page it would hide the second one?

    &lt;img src=&quot;images/test1.png&quot;&gt;
    &lt;img src=&quot;images/hideme.gif&quot;&gt;
    &lt;img src=&quot;images/test3.jpg&quot;&gt;

CSS hide all images with matching SRC attribute

Is it possible to create a CSS rule that would apply a style to any IMG tag with a SRC that contained a specific string, say "hideme"? For instance, if I had the following 3 images on a page it would hide the second one?
<pre><code class="hljs language-ini">&#x3C;img src="images/test1.png">
&#x3C;img src="images/hideme.gif">
&#x3C;img src="images/test3.jpg">
</code></pre>

I want to detect **where** a `MouseEvent` has occurred, in **coordinates relative to the clicked element**. Why? Because I want to add an absolutely positioned child element at the clicked location.

I know how to detect it when no CSS3 transformations exist (see description below). However, when I add a CSS3 Transform, then my algorithm breaks, and I don&#39;t know how to fix it.

I&#39;m not using any JavaScript library, and I want to understand how things work in plain JavaScript. So, please, don&#39;t answer with &quot;just use jQuery&quot;.

By the way, I want a solution that works for all MouseEvents, not just &quot;click&quot;. Not that it matters, because I believe all mouse events share the same properties, thus the same solution should work for all of them.

----

## Background information

According to [DOM Level 2 specification][2], a [`MouseEvent`][1] has few properties related to getting the event coordinates:

* `screenX` and `screenY` return the screen coordinates (the origin is the top-left corner of user&#39;s monitor)
* `clientX` and `clientY` return the coordinates relative the document viewport.

Thus, in order to find the position of the `MouseEvent` relative to the clicked element content, I must do this math:

    ev.clientX - this.getBoundingClientRect().left - this.clientLeft + this.scrollLeft

* `ev.clientX` is the coordinate relative to the document viewport
* `this.getBoundingClientRect().left` is the position of the element relative to the document viewport
* `this.clientLeft` is the amount of border (and scrollbar) between the element boundary and the inner coordinates
* `this.scrollLeft` is the amount of scrolling inside the element

[`getBoundingClientRect()`][3], [`clientLeft`][4] and [`scrollLeft`][5] are specified at [CSSOM View Module][6].

## Experiment without CSS Transform (it works)

Confusing? [Try the following piece of JavaScript and HTML][jsfiddle]. Upon clicking, a red dot should appear exactly where the click has happened. This version is &quot;quite simple&quot; and works as expected.

    function click_handler(ev) {
        var rect = this.getBoundingClientRect();
        var left = ev.clientX - rect.left - this.clientLeft + this.scrollLeft;
        var top = ev.clientY - rect.top - this.clientTop + this.scrollTop;
    
        var dot = document.createElement(&#39;div&#39;);
        dot.setAttribute(&#39;style&#39;, &#39;position:absolute; width: 2px; height: 2px; top: &#39;+top+&#39;px; left: &#39;+left+&#39;px; background: red;&#39;);
        this.appendChild(dot);
    }
    
    document.getElementById(&quot;experiment&quot;).addEventListener(&#39;click&#39;, click_handler, false);

    &lt;div id=&quot;experiment&quot; style=&quot;border: 5px inset #AAA; background: #CCC; height: 400px; position: relative; overflow: auto;&quot;&gt;
        &lt;div style=&quot;width: 900px; height: 2px;&quot;&gt;&lt;/div&gt; 
        &lt;div style=&quot;height: 900px; width: 2px;&quot;&gt;&lt;/div&gt;
    &lt;/div&gt;

## Experiment adding a CSS Transform (it fails)

Now, [try adding a CSS `transform`][jsfiddle2]:

    #experiment {
        transform: scale(0.5);
        -moz-transform: scale(0.5);
        -o-transform: scale(0.5);
        -webkit-transform: scale(0.5);
        /* Note that this is a very simple transformation. */
        /* Remember to also think about more complex ones, as described below. */
    }

The algorithm doesn&#39;t know about the transformations, and thus calculates a wrong position. What&#39;s more, the results are different between Firefox 3.6 and Chrome 12. Opera 11.50 behaves just like Chrome.

In this example, the only transformation was scaling, so I could multiply the scaling factor to calculate the correct coordinate. However, if we think about arbitrary transformations (scale, rotate, skew, translate, matrix), and even nested transformations (a transformed element inside another transformed element), then we really need a better way to calculate the coordinates.


[1]: https://developer.mozilla.org/en/DOM/Event/UIEvent/MouseEvent
[2]: http://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html#Events-eventgroupings-mouseevents
[3]: https://developer.mozilla.org/en/DOM/element.getBoundingClientRect
[4]: https://developer.mozilla.org/en/DOM/element.clientLeft
[5]: https://developer.mozilla.org/en/DOM/element.scrollLeft
[6]: http://www.w3.org/TR/cssom-view/#extensions-to-the-element-interface
[jsfiddle]: http://jsfiddle.net/7CKyT/5/
[jsfiddle2]: http://jsfiddle.net/7CKyT/6/


How to get the MouseEvent coordinates for an element that has CSS3 Transform?

I have two DIVs that I need to position exactly on top of each other. However, when I do that, the formatting gets all screwed up because the containing DIV acts like there is no height. I think this is the expected behavior with `position:absolute` but I need to find a way to position these two elements on top of each other and have the container stretch as the content stretches:

The top left edge of `.layer2` should be exactly aligned to the top left edge of `layer1`

    &lt;!-- HTML --&gt;
    &lt;div class=&quot;container_row&quot;&gt;
        &lt;div class=&quot;layer1&quot;&gt;
            Lorem ipsum...
        &lt;/div&gt;
        &lt;div class=&quot;layer2&quot;&gt;
            More lorem ipsum...
        &lt;/div&gt;
    &lt;/div&gt;
    &lt;div class=&quot;container_row&quot;&gt;
        ...same HTML as above. This one should never overlap the .container_row above.
    &lt;/div&gt;

    /* CSS */
    .container_row {}

    .layer1 {
        position:absolute;
        z-index: 1;
    }

    .layer2 {
        position:absolute;
        z-index: 2;
    }

CSS: How to position two elements on top of each other, without specifying a height?

&gt; **Possible Duplicate:**  
&gt; [CSS - Equal Height Columns?](https://stackoverflow.com/questions/2114757/css-equal-height-columns)  

&lt;!-- End of automatically inserted text --&gt;

I have 3 divs.

Like this:

    &lt;div class=&quot;features&quot;&gt;&lt;/div&gt;
    &lt;div class=&quot;features&quot;&gt;&lt;/div&gt;
    &lt;div class=&quot;features&quot;&gt;&lt;/div&gt;

They are going to be filled with text. I&#39;m not sure how much. The thing is, it&#39;s imperative that they are all equal heights.

How can i use jQuery (or CSS) to find the tallest of the DIV&#39;s and set the other two to the same height, creating 3 equal height DIV&#39;s.

Is this possible?

Use jQuery/CSS to find the tallest of all elements

I am writing a glossary page. I have the alphabet links on the top of the page. I want to keep the top of the page (including the alphabet links) fixed, whilst the section of the page with the definitions, scrolls up/down as an alphabet is clicked.

My HTML looks a bit like this:

    &lt;html&gt;
    &lt;head&gt;&lt;title&gt;My Glossary&lt;/title&gt;&lt;/head&gt;
    &lt;body&gt;
            &lt;div id=&quot;top&quot;&gt;
                &lt;a href=&quot;#A&quot;&gt;A&lt;/a&gt; |
                 &lt;a href=&quot;#B&quot;&gt;B&lt;/a&gt; |
                &lt;a href=&quot;#Z&quot;&gt;Z&lt;/a&gt;
            &lt;/div&gt;
    
            &lt;div id=&quot;term-defs&quot;&gt;
               &lt;dl&gt;
                   &lt;span id=&quot;A&quot;&gt;&lt;/span&gt;
                   &lt;dt&gt;foo&lt;/dt&gt;
                   &lt;dd&gt;This is the sound made by a fool&lt;/dd&gt;
                   &lt;!-- and so on ... --&gt;
               &lt;/dl&gt;
            &lt;/div&gt;
    &lt;/body&gt;
    &lt;/html&gt;

**[Edit]**

The kind of effect I am trying to create is similar to the one [here][1]. The difference being that in the example in the link, the page scrolling is done when a user clicks on a category. In my case, I want to scroll the page when an index (i.e. an alphabet) at the top of the page, is clicked.


  [1]: http://www.1stwebdesigner.com/wp-content/uploads/2010/07/index.html

How to fix a Div to top of page with CSS only

I&#39;m trying to style the dropdown arrow of a `&lt;select&gt;` element with CSS only , it works perfectly in Chrome/Safari:

    select {
      -webkit-appearance: button;
      -webkit-border-radius: 2px;
      -webkit-box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.1);
      -webkit-padding-end: 20px;
      -webkit-padding-start: 2px;
      -webkit-user-select: none;
      
      background-image: url(&#39;./select-arrow1.png&#39;) ;
      background-position: center right;
      background-repeat: no-repeat;
      border: 1px solid #AAA;
      margin: 0;
      padding-top: 2px;
      padding-bottom: 2px;
      width: 200px;
    }

Which renders beautifully [as seen here](http://i.imgur.com/bYl2X.jpg)

By that logic, the only thing I had to do to make it work in Firefox was to add all `-webkit-*` stuff as `-moz-*` :
    
    -moz-appearance: button;
    -moz-border-radius: 2px;
    -moz-box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.1);
    -moz-padding-end: 20px;
    -moz-padding-start: 2px;
    -moz-user-select: none;
    

It works for 99%, the only problem is that the default dropdown arrow doesn&#39;t go away, and stays on top of the background image [as seen here](http://i.imgur.com/SQPXO.jpg)

It looks like `-moz-appearance: button;` does not work for a `&lt;select&gt;` element. Also `-moz-appearance: none;` has no effect to remove the default dropdown arrow.

So what is the correct value for `-moz-appearance` to remove the default dropdown arrow? 

Updates:
=======

**December 11, 2014**: **Stop inventing new hacks**. After 4 and a half years, `-moz-appearance:none` is starting to work since Firefox 35. Although `moz-appearance:button` is still broken, you don&#39;t need to use it anyway. [Here is a very basic working example.](http://jsfiddle.net/88rpe9ze/) 

**April 28, 2014**: The mentioned [css hack](//stackoverflow.com/questions/6787667/what-is-the-correct-moz-appearance-value-to-hide-dropdown-arrow-of-a-select#answer-18327666) worked for a couple of months but since the begining of April 2014 this bug is creeping back into Firefox 31.0.a1 Nightly on all platforms.




What is the correct &quot;-moz-appearance&quot; value to hide dropdown arrow of a &lt;select&gt; element

Here&#39;s the image in question of my HTML page.
The text menu is inside a right aligned div, and has 1.2em letter spacing.
Is there a pseudo-selector for this? I would not like to have to resort to relative positioning.

I would love the text menu to end where the block ends.

![Right text-aligned div where letter spacing applies for all characters of a line][1]


  [1]: http://i.stack.imgur.com/Pcs2s.png

I&#39;ve already marked the best answer, but I was asked for the markup regardless by CodeBlock. Here it is.

```HTML
&lt;div class=&quot;sidebar&quot;&gt;
    &lt;span class=&quot;menuheader&quot;&gt;MENU&lt;/span&gt;
    &lt;ul&gt;
        &lt;li&gt;&lt;a href=&quot;#content&quot;&gt;Content&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a href=&quot;#attachments&quot;&gt;Attachments&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a href=&quot;#subpages&quot;&gt;Sub-pages&lt;/a&gt;&lt;/li&gt;
        &lt;li&gt;&lt;a href=&quot;#newsubpage&quot;&gt;New sub-page&lt;/a&gt;&lt;/li&gt;
        &lt;/a&gt;
    &lt;/ul&gt;
&lt;/div&gt;
```
```CSS
.sidebar {
    color: rgb(150,93,101);
    display: inline;
    line-height: 1.3em;
    position: absolute;
    top: 138px;
    width: 218px;
}
    
.menuheader {
    letter-spacing: 1.1em;
    margin: -1.2em;
    text-align: right;
}
```

How can I remove letter-spacing for the last letter of an element in CSS?

This is driving me nuts:

**HTML:**

    &lt;div&gt;&lt;h1&gt;Hello World!&lt;/h1&gt;&lt;/div&gt;

**CSS:**

&lt;!-- language: lang-css --&gt;

    *:not(div) h1 { color: #900; }

Doesn&#39;t this read, &quot;Select all `h1` elements that have an ancestor that is not a `div` element...?&quot; Thus, &quot;Hello World!&quot; should not be coloured red, yet it still is.

For the above markup, adding the child combinator works:

&lt;!-- language: lang-css --&gt;

    *:not(div) &gt; h1 { color: #900; }

But doesn&#39;t affect the `h1` element if it is not a child of a `div` element. For example:

    &lt;div&gt;&lt;article&gt;&lt;h1&gt;Hello World!&lt;/h1&gt;&lt;/article&gt;&lt;/div&gt;

Which is why I&#39;d like to indicate the `h1` element as a descendant, not a child, of the `div` element. Anyone?

CSS negation pseudo-class :not() for parent/ancestor elements

    var classes = $(this).attr(&#39;class&#39;).split(&#39; &#39;); // this gets the current element classes
    
    var classes = $(this).parent().attr(&#39;class&#39;).split(&#39; &#39;); // this gets the parent classes.

The parent in the above situation is an ankor.

If I wanted to get the first parent DIV of $(this) what would the code look like?

    var classes = $(this).div:parent().attr(&#39;class&#39;).split(&#39; &#39;); // just a quick try.



*** Basically I want to get the classes of the first parent DIV of $(this).

thx


How to select first parent DIV using jQuery?

I understand that css rules can target elements specified by attribute values, e.g.:

    input[type=&quot;text&quot;] {}

Can I make a rule that targets elements which *omit* a certain attribute?  For example, can I target &lt;a&gt; elements that lack an href or &lt;input&gt; elements that don&#39;t specify a type?

Is there a CSS selector for elements lacking an attribute?

How to change the style of child element when there is hover on parent element. I would prefer a CSS solution for this if possible. Is there any solution possible through :hover CSS selectors. Actually I need to change color of options bar inside a panel when there is an hover on the panel.

*Looking to support all major browsers.*




Style child element when hover on parent

I need to perform Wildcard (`*`, `?`, etc.) search on a string.
This is what I have done:

    string input = &quot;Message&quot;;
    string pattern = &quot;d*&quot;;
    Regex regex = new Regex(pattern, RegexOptions.IgnoreCase);

    if (regex.IsMatch(input))
    {
        MessageBox.Show(&quot;Found&quot;);
    }
    else
    {
        MessageBox.Show(&quot;Not Found&quot;);
    }

With the above code &quot;Found&quot; block is hitting but actually it should not!

If my pattern is &quot;e*&quot; then only &quot;Found&quot; should hit.

My understanding or requirement is d* search should find the text containing &quot;d&quot; followed by any characters.

Should I change my pattern as &quot;d.\*&quot; and &quot;e.*&quot;? Is there any support in .NET for Wild Card which internally does it while using Regex class?


Need to perform Wildcard (*,?, etc) search on a string using Regex

Why does &quot;_&quot; (underscore) match &quot;-&quot; (hyphen)?

Here&#39;s how one might list all files matching a pattern in bash:

    ls *.jar

How to list the complement of a pattern? i.e. all files not matching *.jar?

List files not matching a pattern?

I am trying to rsync directory A of server1 with directory B of server2.

Sitting in the directory A of server1, I ran the following commands.

    rsync -av * server2::sharename/B

but the interesting thing is, it synchronizes all files and directories except .htaccess or any hidden file in the directory A. Any hidden files within subdirectories get synchronized.

I also tried the following command:

    rsync -av --include=&quot;.htaccess&quot; * server2::sharename/B

but the results are the same.

Any ideas why hidden files of A directory are not getting synchronized and how to fix it. I am running as root user.

thanks



rsync not synchronizing .htaccess file

    import os

    import subprocess

    proc = subprocess.Popen([&#39;ls&#39;,&#39;*.bc&#39;], stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    out,err = proc.communicate()

    print out


This script should print all the files with .bc suffix however it returns an empty list. If I do ls *.bc manually in the command line it works. Doing [&#39;ls&#39;,&#39;test.bc&#39;] inside the script works as well but for some reason the star symbol doesnt work.. Any ideas ?



Content Type	Original Author	Original Content on Stackoverflow
Question	THE JOATMON	View Question on Stackoverflow
Solution 1 - Css	BoltClock	View Answer on Stackoverflow

CSS hide all images with matching SRC attribute

Css Problem Overview

Css Solutions

Solution 1 - Css

How can I find if a particular package exists on my Android device?

Why doesn't PHP permit private const?

Attributions