ncou

    // See https://stackoverflow.com/questions/133925/javascript-post-request-like-a-form-submit, jQuery version with arrays and objects support
    function post(path, parameters) {
        var form = $('<form></form>');

        form.attr("method", "post");
        form.attr("action", path);

        $.each(parameters, function(key, value) {
            if ( typeof value == 'object' || typeof value == 'array' ){
                $.each(value, function(subkey, subvalue) {

ncou

/**
 * Original code from https://github.com/mike-schultz/materialette
 */

function rgbToHex(r, g, b) {
  return "#" + ((1 << 24) + (parseInt(r) << 16) + (parseInt(g) << 8) + parseInt(b)).toString(16).slice(1);
}

function hexToRgb(hex) {
  const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);

ncou

// from http://en.wikipedia.org/wiki/Luminance_(relative)
// R, G, B are integers between 0 and 255
function relativeLuminance(R, G, B) {
 
  var Y = (0.2126 * R + 0.7152 * G + 0.0722 * B) / 255;
 
  return Y;
}

ncou

// from http://www.w3.org/TR/WCAG20/#relativeluminancedef
function relativeLuminanceW3C(R8bit, G8bit, B8bit) {

    var RsRGB = R8bit/255;
    var GsRGB = G8bit/255;
    var BsRGB = B8bit/255;

    var R = (RsRGB <= 0.03928) ? RsRGB/12.92 : Math.pow((RsRGB+0.055)/1.055, 2.4);
    var G = (GsRGB <= 0.03928) ? GsRGB/12.92 : Math.pow((GsRGB+0.055)/1.055, 2.4);
    var B = (BsRGB <= 0.03928) ? BsRGB/12.92 : Math.pow((BsRGB+0.055)/1.055, 2.4);

ncou

Demonstrates how to handle the window's focus and blur events.

This code does not depend on any third-party libraries like jQuery.

ncou

var CubicBezier = function(canvas, opts){
	if(!opts) opts = {};

	this.start = opts.start || new Vec2(100,100);
	this.end   = opts.end   || new Vec2(400, 400);

	this.c1    = opts.c1    || new Vec2(100, 300);
	this.c2 	 = opts.c2 		|| new Vec2(300, 100);

	this.curve = new fabric.Path( this.toSVGPath() );

ncou

<?php

/**
 * Get the average pixel colour from the given file using Image Magick
 * 
 * @param string $filename
 * @param bool $as_hex      Set to true, the function will return the 6 character HEX value of the colour.    
 *                          If false, an array will be returned with r, g, b components.
 */
function get_average_colour($filename, $as_hex_string = true) {

ncou

Difference between Debounce and Throttle

Debounce

Debounce a function when you want it to execute only once after a defined interval of time. If the event occurs multiple times within the interval, the interval is reset each time.
Example A user is typing into an input field and you want to execute a function, such as a call to the server, only when the user stops typing for a certain interval, such as 500ms.

Throttle

ncou

<?php

$data = (object)array(
	"html" => "<foo bar=\"baz\"/> &amp;",
	"arabic" => "العربية al-ʿarabiyyah, IPA: [æl ʕɑrɑˈbijjɐ], or عربي ʿarabī",
	"hebrew" => "עִבְרִית, Ivrit",
	"chinese" => "汉语/漢語 Hanyu; 华语/華語 Huáyǔ; 中文 Zhōngwén",
	"korean" => "한국어/조선말",
	"japanese" => "日本語 Nihongo",
	"umlauts" => "äüöãáàß",

ncou

<?php

function json_response($message = null, $code = 200)
{
    // clear the old headers
    header_remove();
    // set the actual code
    http_response_code($code);
    // set the header to make sure cache is forced
    header("Cache-Control: no-transform,public,max-age=300,s-maxage=900");