module.js

/** @module Auxiliary */

var toString = Object.prototype.toString;

/**
 *  Iterates over `args` and invokes the supplied callback with an 
 *  `item` and `index`.
 *
 *  @param {array}      args - The array of items to iterate over.
 *  @param {function}   callback - The function to call for each index.
 */
exports.each = function(args, callback) {
  var i = -1; while(args[++i]) { callback(args[i], i + 1); };
};

var types = [
  'Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp'
];
exports.each(types, function(type) {
  exports['is' + type] = function(obj) {
    return toString.call(obj) === '[object ' + type + ']';
  };
});