String#arrayReplace: similar to String#replace, but allows you to pass multiple array sets for replacement.

string.array_replace.coffee

String.prototype.arrayReplace = (args...) ->
  rtn = @
  for set in args
    rtn = rtn.replace(new RegExp(set[0], 'gi'), set[1])
  rtn

string.array_replace.js

/*
  Replace characters matching the first element of an array with the second element
  
  "mississippi".arrayReplace(['i','n'], ['p','m']) => "mnssnssnmmn"
  
  @params Array
  @return String
*/

String.prototype.arrayReplace = function() {
  var args, rtn, set, _i, _len;
  args = 1 <= arguments.length ? Array.prototype.slice.call(arguments, 0) : [];
  rtn = this;
  for (_i = 0, _len = args.length; _i < _len; _i++) {
      set = args[_i];
      rtn = rtn.replace(new RegExp(set[0], 'gi'), set[1]);
  }
  return rtn;
};