Named parameters application of a function

gistfile1.js

/**
 * Applies a set of named arguments to a `func`.
 *
 * Example: var f = function(x, y, z) { return x * (y - z); };
 *          namedApply(f, {x: 1, y: 2, z: 3});
 * 
 * @param f {Function} A function to invoke.
 * @param args {Object} A collection of named arguments.
 * @return {Function} A new function with partially applied named arguments.
 */
function namedApply(f, args) {
  return f.apply(this, argumentsName(f).map(function(name){ return args[name] }))

  function argumentsName(f){ return f.toString()
                                     .match(/function[^(]*\((.*?)\)/)[1]
                                     .split(/\s*,\s*/) }
}