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What does %w(array) mean?
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%w(foo bar) is a shortcut for ["foo", "bar"]. Meaning it's a notation to write an array of strings separated by spaces instead of commas and without quotes around them. You can find a list of ways of writing literals in zenspider's quickref.
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What's the best way to validate an XML file against an XSD file?
...e a document object model anyway). This will start creating DOM objects as it parses the document - wasteful if you aren't going to use them.
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Get all attributes of an element using jQuery
... });
});
What you can also do is extending .attr so that you can call it like .attr() to get a plain object of all attributes:
(function(old) {
$.fn.attr = function() {
if(arguments.length === 0) {
if(this.length === 0) {
return null;
}
var obj = {};
$.ea...
How do I use CSS in Django?
...media files in the template -- say, an image inside an image folder from /site_media/images/foo.gif.
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Context switches much slower in new linux kernels
...S on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to believe.
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How to install a specific JDK on Mac OS X?
...un.com/javase/downloads/index.jsp .
I looked for a Mac version, but I'm a bit surprised to only see downloadable versions for Linux, Windows and Solaris ...
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Displaying the build date
I currently have an app displaying the build number in its title window. That's well and good except it means nothing to most of the users, who want to know if they have the latest build - they tend to refer to it as "last Thursday's" rather than build 1.0.8.4321.
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Build Eclipse Java Project from Command Line
...urce\MyProject\workspace" -application org.eclipse.jdt.apt.core.aptBuild
It uses the jdt apt plugin to build your workspace automatically. This is also known as a 'Headless Build'. Damn hard to figure out. If you're not using a win32 exe, you can try this:
java -cp startup.jar -noSplash -data "...
How to write into a file in PHP?
...contents($filename, $content);
which is identical to calling fopen(), fwrite(), and fclose() successively to write data to a file.
Docs: file_put_contents
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How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searc
... will find the module files.
Default @INC
Perl interpreter is compiled with a specific @INC default value. To find out this value, run env -i perl -V command (env -i ignores the PERL5LIB environmental variable - see #2) and in the output you will see something like this:
$ env -i perl -V
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@I...