Helpful JavaScript prototypes!

helpful_prototypes.js

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/*  Prototypes that work against primitives  */
/*********************************************/
String.prototype.trim = function() { return this.replace(/^\s+|\s+$/g, ''); };
String.prototype.contains = function(t) { return this.indexOf(t) >= 0 ? true : false; };
String.prototype.beginsWith = function(t, i) { if (i == false) { return (t == this.substring(0, t.length)); } else { return (t.toLowerCase() == this.substring(0, t.length).toLowerCase()); } };
String.prototype.endsWith = function(t, i) { if (i == false) { return (t == this.substring(this.length - t.length)); } else { return (t.toLowerCase() == this.substring(this.length - t.length).toLowerCase()); } };
Object.prototype.merge = (function (ob) {var o = this;var i = 0;for (var z in ob) {if (ob.hasOwnProperty(z)) {o[z] = ob[z];}}return o;});

/* Examples:

var s = '  I have white space ';

s.trim() --->  'I have white space'
s.contains("white") ----> true
s.contains("blue") ----> false
s.beginsWith("I") ----> false
s.trim().beginsWith("I") ----> true
s.endsWith("space") ----> false
s.trim().endsWith("space") ----> true

var a = { "Color" : "Red", "Size" : "Large" };
var b = { "Color" : "Green", "Opens" : "Left" };

a.merge(b) --->  a would now be: { "Color" : "Green", "Size" : "Large", "Opens" : "Left" }

or if you merged a into b

b.merge(a) ---> b would now be: { "Color" : "Red", "Size" : "Large", "Opens" : "Left" }

*/