Skip to content

Instantly share code, notes, and snippets.

var isOpera = !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;
// Opera 8.0+ (UA detection to detect Blink/v8-powered Opera)
var isFirefox = typeof InstallTrigger !== 'undefined'; // Firefox 1.0+
var isSafari = Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0;
// At least Safari 3+: "[object HTMLElementConstructor]"
var isChrome = !!window.chrome && !isOpera; // Chrome 1+
var isIE = /*@cc_on!@*/false; // At least IE6
@xperiments
xperiments / Dictionary.ts
Created June 25, 2013 18:48
Typescript Dictionary
//http://stackoverflow.com/questions/15877362/declare-and-initialize-a-dictionary-in-typescript
interface IDictionary {
add(key: string, value: any): void;
remove(key: string): void;
containsKey(key: string): bool;
keys(): string[];
values(): any[];
}
@xperiments
xperiments / new_gist_file
Last active February 13, 2018 22:05
[[ts] Check if obj is instanceof U] Check if obj is instanceof U
// => http://stackoverflow.com/questions/17392349/how-can-i-check-if-element-is-an-instanceof-u
function OfType<T, U>(list: T[], arg: Function) : U[]
{
var result: U[] = [];
list.forEach(e => {
// extract the name of the class
// used to match primitive types
var typeName = /function\s*([^(]*)/i.exec(arg+"")[1].toLocaleLowerCase();
@xperiments
xperiments / ArrayBuffer2Base64.js
Last active February 13, 2018 22:05
[[js][utils][base64] ArrayBuffer2Base64] ArrayBuffer2Base64 #js #base64
// Converts an ArrayBuffer directly to base64, without any intermediate 'convert to string then
// use window.btoa' step. According to my tests, this appears to be a faster approach:
// http://jsperf.com/encoding-xhr-image-data/5
function base64ArrayBuffer(arrayBuffer) {
var base64 = ''
var encodings = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
var bytes = new Uint8Array(arrayBuffer)
var byteLength = bytes.byteLength
@xperiments
xperiments / interlval.js
Last active February 13, 2018 22:00
[[js][hacks]] Better setInterval #js #hacks #tips
// http://www.thecodeship.com/web-development/alternative-to-javascript-evil-setinterval/
function interval(func, wait, times){
var interv = function(w, t){
return function(){
if(typeof t === "undefined" || t-- > 0){
setTimeout(interv, w);
try{
func.call(null);
}
catch(e){
@xperiments
xperiments / OneTimeDirective.ts
Created February 13, 2018 21:59
[[ng][directives]] OneTimeDirective #ng #directive
// https://github.com/angular/angular/issues/14033
@Directive({
selector: '[oneTime]',
})
export class OneTimeDirective {
constructor(template: TemplateRef<any>, container: ViewContainerRef, zone: NgZone) {
zone.runOutsideAngular(() => {
const view = container.createEmbeddedView(template);
setTimeout(() => view.detach());
@xperiments
xperiments / Singleton.ts
Created June 25, 2013 18:43
Typescript Singleton
module x
{
export class Singleton
{
private static _instance : Singleton;
constructor( singletonEnforcer:()=>void )
{
if( singletonEnforcer !== SingletonEnforcer )
{
throw new Error("Error: Instantiation failed: Use Singleton.getInstance() instead of new.");
@xperiments
xperiments / base64-binary.js
Created July 10, 2013 10:08
Base64 => Binary
/*
Copyright (c) 2011, Daniel Guerrero
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
@xperiments
xperiments / xhr2base64
Created July 10, 2013 10:07
XHR => base64 => Binary
http://stackoverflow.com/questions/7370943/retrieving-binary-file-content-using-javascript-base64-encode-it-and-reverse-de
https://gist.github.com/jonleighton/958841
https://github.com/danguer/blog-examples/blob/master/js/base64-binary.js
function getBinary(file){
var xhr = new XMLHttpRequest();
xhr.open("GET", file, false);
xhr.overrideMimeType("text/plain; charset=x-user-defined");
xhr.send(null);
return xhr.responseText;
}
function base64Encode(str) {
var CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";