Snipplr - noah

(Bash) Alias a command and save it in .profile

Sat, 19 Jul 2008 13:03:50 GMT

(JavaScript) Conditionally assign a value to a variable

Mon, 23 Jun 2008 08:44:59 GMT

To assign a value to a variable only if some expression evaluates to true, I would usually do this: var foo; if (condition){ foo = "success"; } This is Douglas Crockford's idiom and it shortens the above from 4 lines to 1. I have understood for a while that (expr1 && expr2) evaluates to truth only if both conditions are true. What I did not get before Crockford pointed it out in his book, was that && doesn't simply return a boolean value -- it returns the result of the last expression that was evaluated. So if both expressions evaluate to false, the result of first expression will be returned. If only one expression evaluates true, the result of the false expression will be returned. And if both expressions evaluate to truth, the result of the second expression is returned.

(JavaScript) List all IDs in the DOM tree

Wed, 28 May 2008 17:27:18 GMT

List all the IDs on the page.

(Perl) pod

Sun, 03 Feb 2008 15:50:04 GMT

(Bash) Create a directory recursively

Tue, 23 Oct 2007 02:01:14 GMT

Given the legal path of a nonexistent directory, create that path and directory.

(Perl) starter Perl module

Tue, 03 Jul 2007 23:04:21 GMT

Put this in the file MyPackage.pm, and call it with Use::MyPackage

(JavaScript) Safely Get and Operate Upon An Element

Thu, 28 Jun 2007 20:09:25 GMT

Pass this an ID or an object reference, as well as any number of functions that take the referenced object as a parameter. This wrapper is intended to provide a sanity check against missing DOM elements.

(Lisp) load an external file

Mon, 18 Jun 2007 20:48:42 GMT