string formatter native

formater.js

function fmt(String) { // modernized version of dean's tool in ie7.js
  // Replace %n with arguments[n].
  // e.g. fmt("%1 %2%3 %2a %1%3", "she", "se", "lls") == "she sells sea shells";
  return String.replace(/%([\d])/g, fmt.call.bind([].at.bind(arguments)));
};

// fmt("this is a %2 script, ain't it %1?", "cool", "dan");
// fmt("this is a %2 script, ain't it %1?", "dan", "cool");