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annotated.js

String.prototype.format = function (
	values //Object with values
) {
	return this.replace(/\{(.+)\}/g, //RegExp
	function (s, prop) { //Property name of value
		return values[prop];  //Replace by value
	});
};

index.js

String.prototype.format=function(a){return this.replace(/\{(.+)\}/g,function(b,c){return a[c]})}

LICENSE.txt

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

package.json

{
  "name": "String.format",

  "description": "Simple string format.",

  "keywords": [
    "string",
    "format"
  ]
}