54 lines
1.7 KiB
JavaScript
54 lines
1.7 KiB
JavaScript
var baseClone = require('./_baseClone'),
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baseIteratee = require('./_baseIteratee');
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/** Used to compose bitmasks for cloning. */
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var CLONE_DEEP_FLAG = 1;
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/**
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* Creates a function that invokes `func` with the arguments of the created
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* function. If `func` is a property name, the created function returns the
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* property value for a given element. If `func` is an array or object, the
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* created function returns `true` for elements that contain the equivalent
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* source properties, otherwise it returns `false`.
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*
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* @static
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* @since 4.0.0
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* @memberOf _
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* @category Util
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* @param {*} [func=_.identity] The value to convert to a callback.
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* @returns {Function} Returns the callback.
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* @example
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*
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* var users = [
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* { 'user': 'barney', 'age': 36, 'active': true },
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* { 'user': 'fred', 'age': 40, 'active': false }
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* ];
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*
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* // The `_.matches` iteratee shorthand.
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* _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
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* // => [{ 'user': 'barney', 'age': 36, 'active': true }]
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*
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* // The `_.matchesProperty` iteratee shorthand.
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* _.filter(users, _.iteratee(['user', 'fred']));
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* // => [{ 'user': 'fred', 'age': 40 }]
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*
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* // The `_.property` iteratee shorthand.
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* _.map(users, _.iteratee('user'));
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* // => ['barney', 'fred']
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*
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* // Create custom iteratee shorthands.
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* _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
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* return !_.isRegExp(func) ? iteratee(func) : function(string) {
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* return func.test(string);
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* };
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* });
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*
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* _.filter(['abc', 'def'], /ef/);
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* // => ['def']
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*/
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function iteratee(func) {
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return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
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}
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module.exports = iteratee;
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