[d565449] | 1 | import baseClone from './_baseClone.js';
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| 2 | import baseIteratee from './_baseIteratee.js';
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| 3 |
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| 4 | /** Used to compose bitmasks for cloning. */
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| 5 | var CLONE_DEEP_FLAG = 1;
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| 6 |
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| 7 | /**
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| 8 | * Creates a function that invokes `func` with the arguments of the created
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| 9 | * function. If `func` is a property name, the created function returns the
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| 10 | * property value for a given element. If `func` is an array or object, the
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| 11 | * created function returns `true` for elements that contain the equivalent
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| 12 | * source properties, otherwise it returns `false`.
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| 13 | *
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| 14 | * @static
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| 15 | * @since 4.0.0
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| 16 | * @memberOf _
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| 17 | * @category Util
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| 18 | * @param {*} [func=_.identity] The value to convert to a callback.
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| 19 | * @returns {Function} Returns the callback.
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| 20 | * @example
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| 21 | *
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| 22 | * var users = [
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| 23 | * { 'user': 'barney', 'age': 36, 'active': true },
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| 24 | * { 'user': 'fred', 'age': 40, 'active': false }
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| 25 | * ];
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| 26 | *
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| 27 | * // The `_.matches` iteratee shorthand.
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| 28 | * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
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| 29 | * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
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| 30 | *
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| 31 | * // The `_.matchesProperty` iteratee shorthand.
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| 32 | * _.filter(users, _.iteratee(['user', 'fred']));
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| 33 | * // => [{ 'user': 'fred', 'age': 40 }]
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| 34 | *
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| 35 | * // The `_.property` iteratee shorthand.
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| 36 | * _.map(users, _.iteratee('user'));
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| 37 | * // => ['barney', 'fred']
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| 38 | *
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| 39 | * // Create custom iteratee shorthands.
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| 40 | * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
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| 41 | * return !_.isRegExp(func) ? iteratee(func) : function(string) {
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| 42 | * return func.test(string);
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| 43 | * };
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| 44 | * });
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| 45 | *
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| 46 | * _.filter(['abc', 'def'], /ef/);
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| 47 | * // => ['def']
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| 48 | */
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| 49 | function iteratee(func) {
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| 50 | return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
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| 51 | }
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| 52 |
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| 53 | export default iteratee;
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