Sobak

<?php
function factorial($num) {
    return eval('return '.implode(range(1, $num), '*').';');
}

// more readable form
function factorial2($num) {
    $operation = implode(range(1, $num), '*');
    return eval("return $operation;");
}

addyosmani

CSS Layout Debugger

A tweet-sized debugger for visualizing your CSS layouts. Outlines every DOM element on your page a random (valid) CSS hex color.

One-line version to paste in your DevTools

Use $$ if your browser aliases it:

~ 108 byte version

jlong

// Brightness math based on:
//   http://www.nbdtech.com/Blog/archive/2008/04/27/Calculating-the-Perceived-Brightness-of-a-Color.aspx

$red-magic-number: 241;
$green-magic-number: 691;
$blue-magic-number: 68;
$brightness-divisor: $red-magic-number + $green-magic-number + $blue-magic-number;

@function brightness($color) {
  // Extract color components

heat

beforeEach(function() {
	this.addMatchers({
	    toBeInstanceOf: function(expectedInstance) {
	    	var actual = this.actual;
	    	var notText = this.isNot ? " not" : "";
	    	this.message = function() {
	    		return "Expected " + actual.constructor.name + notText + " is instance of " + expectedInstance.name;
	    	};
	    	return actual instanceof expectedInstance;
	    }