JS String.format, String.prototype.format

gistfile1.js

// "{0} is dead, but {1} is alive! {0} {2}".format("ASP", "ASP.NET")
if (!String.prototype.format) {
  String.prototype.format = function() {
    var args = arguments;
    return this.replace(/{(\d+)}/g, function(match, number) { 
      return typeof args[number] != 'undefined'
        ? args[number]
        : match
      ;
    });
  };
}


// String.format('{0} is dead, but {1} is alive! {0} {2}', 'ASP', 'ASP.NET');
if (!String.format) {
  String.format = function(format) {
    var args = Array.prototype.slice.call(arguments, 1);
    return format.replace(/{(\d+)}/g, function(match, number) { 
      return typeof args[number] != 'undefined'
        ? args[number] 
        : match
      ;
    });
  };
}