Javascript string endsWith()

The following adds an endsWith method to any string. Requires underscore.js.

if (typeof String.prototype.endsWith === 'undefined') {
 String.prototype.endsWith = function(suffix) {
 if (typeof suffix === 'String') {
 return this.indexOf(suffix, this.length - suffix.length) !== -1;
 }else if(suffix instanceof Array){
 return _.find(suffix, function(value){
 console.log(value, (this.indexOf(value, this.length - value.length) !== -1));
 return this.indexOf(value, this.length - value.length) !== -1;
 }, this);
 }
 };
}

It takes both an Array or a string as an argument. Use cases:

 if ( "image.iso".endsWith([".iso",".zip",".tar.gz",".tgz","tar"])){
 // Do something
 }

if ( "Hello World".endsWith("World")){
 // Do something
 }

References: http://stackoverflow.com/questions/280634/endswith-in-javascript

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