gistfile1.js

String.prototype.format = function(){
  var words = this.split(' '),
      arg = arguments,
	  values = typeof arg[0]=='object'?arg[0]:arg,i;
  for(i in words){
    if(words[i][0] == '%')words[i] = values[words[i].slice(1)];
  }
  return words.join(' ');
}

//Compressed by UglifyJS
String.prototype.format=function(){var a=this.split(" "),b=arguments,c=typeof b[0]=="object"?b[0]:b,d;for(d in a)a[d][0]=="%"&&(a[d]=c[a[d].slice(1)]);return a.join(" ")}