HORIZON PROJECT

var baseClone = require('./_baseClone'),

    baseIteratee = require('./_baseIteratee');

/** Used to compose bitmasks for cloning. */

var CLONE_DEEP_FLAG = 1;

/**

 * Creates a function that invokes `func` with the arguments of the created

 * function. If `func` is a property name, the created function returns the

 * property value for a given element. If `func` is an array or object, the

 * created function returns `true` for elements that contain the equivalent

 * source properties, otherwise it returns `false`.

 *

 * @static

 * @since 4.0.0

 * @memberOf _

 * @category Util

 * @param {*} [func=_.identity] The value to convert to a callback.

 * @returns {Function} Returns the callback.

 * @example

 *

 * var users = [

 *   { 'user': 'barney', 'age': 36, 'active': true },

 *   { 'user': 'fred',   'age': 40, 'active': false }

 * ];

 *

 * // The `_.matches` iteratee shorthand.

 * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));

 * // => [{ 'user': 'barney', 'age': 36, 'active': true }]

 *

 * // The `_.matchesProperty` iteratee shorthand.

 * _.filter(users, _.iteratee(['user', 'fred']));

 * // => [{ 'user': 'fred', 'age': 40 }]

 *

 * // The `_.property` iteratee shorthand.

 * _.map(users, _.iteratee('user'));

 * // => ['barney', 'fred']

 *

 * // Create custom iteratee shorthands.

 * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {

 *   return !_.isRegExp(func) ? iteratee(func) : function(string) {

 *     return func.test(string);

 *   };

 * });

 *

 * _.filter(['abc', 'def'], /ef/);

 * // => ['def']

 */

function iteratee(func) {

  return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));

}

module.exports = iteratee;