aaac7fed
 liuqimichale
add
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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;
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