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Fast and responsive interactive charts/graphs: SVG, Canvas, other?
...edrawing individual circles while zooming. You could probably even combine one or more of these techniques with CSS3 transforms to add some hardware acceleration (as in the hierarchical edge bundling example), although that can be tricky to implement and may introduce visual artifacts.
Still, my pe...
How to hide image broken Icon using only CSS/HTML?
...he image, or replacing the source with a backup.
<img src="Error.src" onerror="this.style.display='none'"/>
or
<img src="Error.src" onerror="this.src='fallback-img.jpg'"/>
Update
You can apply this logic to multiple images at once by doing something like this:
document.addEv...
How can I check if a URL exists via PHP?
....)
if( ! isValidUrl($url) ){
unset($urls[$k]);
}
}
echo "yay all done! now show my site";
foreach($urls as $url){
echo "<a href=\"{$url}\">{$url}</a><br/>";
}
The functions below could be helpfull, you probably want to modify them to suit your needs:
function isVali...
Does Parallel.ForEach limit the number of active threads?
...h(FilePathArray, path =>... to read about 24,000 files tonight creating one new file for each file I read in. Very simple code. It appears that even 6 threads was enough to overwhelm the 7200 RPM disk I was reading from at 100% utilization. Over the period of a few hours I watched the Parallel...
Why start a shell command with a backslash?
...uppressed when any character of the command word is quoted. A backslash is one way to do that, but there are also other well known ways to quote: single and double quotes. All of the following will suppress alias substitution:
\curl
cur\l
\c\u\r\l
"c"url
"curl"
"c""u""r""l"
'curl'
'cu'"rl"
...
What APIs are used to draw over other apps (like Facebook's Chat Heads)?
...
This one:
Allows an application to open windows using the type
TYPE_SYSTEM_ALERT, shown on top of all other applications.
Very few applications should use this permission; these windows are intended
for system-level int...
What do querySelectorAll and getElementsBy* methods return?
...s since IDs have to be unique and thus the function always returns exactly one element (or null if none was found).
However, getElementsByClassName(), querySelectorAll(), and other getElementsBy* methods return an array-like collection of elements. Iterate over it like you would with a real array:
...
How to quit android application programmatically
...some codes for quit an Android application programatically. By calling any one of the following code in onDestroy() will it quit application entirely?
...
Difference between if () { } and if () : endif;
...
They are the same but the second one is great if you have MVC in your code and don't want to have a lot of echos in your code. For example, in my .phtml files (Zend Framework) I will write something like this:
<?php if($this->value): ?>
Hello
<?...
Are global variables in PHP considered bad practice? If so, why?
...riables aren't really global in PHP. The scope of a typical PHP program is one HTTP request. Session variables actually have a wider scope than PHP "global" variables because they typically encompass many HTTP requests.
Often (always?) you can call member functions in methods like preg_replace_call...