StringSupplant.js

/*
 * Crockford's Supplant method with support to string, numbers and booleans
 *
 * var myObj = { name: "John Doe", age: 27 }
 * console.log("Hi my name is {name} and I am {age} years old.".supplant(myObj));
 *
 * // Output: Hi my name is John Doe and I am 27 years old.
*/


if (!String.prototype.supplant) {
    String.prototype.supplant = function (o) {
        return this.replace(/{([^{}]*)}/g,
            function (a, b) {
                var r = o[b];
                return typeof r === 'string' || typeof r === 'number' || typeof r === 'boolean' ? r : a;
            }
        );
    };
}