#JavaScript simple String match / replace from arguments

replacer.js

String.prototype.replacer = function() {
    var args = arguments
    return this.replace(/\{([0-9]*)\}/g, function(match, parameter) {
        return args[parseInt(parameter)]
    })
}

var hello = "Hello {0} {1}!"

hello.replacer("John", "Doe") // "Hi John Doe!"