Yang Guo | 4fd355c | 2019-09-19 08:59:03 | [diff] [blame] | 1 | var arraySome = require('./_arraySome'), |
| 2 | baseIteratee = require('./_baseIteratee'), |
| 3 | baseSome = require('./_baseSome'), |
| 4 | isArray = require('./isArray'), |
| 5 | isIterateeCall = require('./_isIterateeCall'); |
| 6 | |
| 7 | /** |
| 8 | * Checks if `predicate` returns truthy for **any** element of `collection`. |
| 9 | * Iteration is stopped once `predicate` returns truthy. The predicate is |
| 10 | * invoked with three arguments: (value, index|key, collection). |
| 11 | * |
| 12 | * @static |
| 13 | * @memberOf _ |
| 14 | * @since 0.1.0 |
| 15 | * @category Collection |
| 16 | * @param {Array|Object} collection The collection to iterate over. |
| 17 | * @param {Function} [predicate=_.identity] The function invoked per iteration. |
| 18 | * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. |
| 19 | * @returns {boolean} Returns `true` if any element passes the predicate check, |
| 20 | * else `false`. |
| 21 | * @example |
| 22 | * |
| 23 | * _.some([null, 0, 'yes', false], Boolean); |
| 24 | * // => true |
| 25 | * |
| 26 | * var users = [ |
| 27 | * { 'user': 'barney', 'active': true }, |
| 28 | * { 'user': 'fred', 'active': false } |
| 29 | * ]; |
| 30 | * |
| 31 | * // The `_.matches` iteratee shorthand. |
| 32 | * _.some(users, { 'user': 'barney', 'active': false }); |
| 33 | * // => false |
| 34 | * |
| 35 | * // The `_.matchesProperty` iteratee shorthand. |
| 36 | * _.some(users, ['active', false]); |
| 37 | * // => true |
| 38 | * |
| 39 | * // The `_.property` iteratee shorthand. |
| 40 | * _.some(users, 'active'); |
| 41 | * // => true |
| 42 | */ |
| 43 | function some(collection, predicate, guard) { |
| 44 | var func = isArray(collection) ? arraySome : baseSome; |
| 45 | if (guard && isIterateeCall(collection, predicate, guard)) { |
| 46 | predicate = undefined; |
| 47 | } |
| 48 | return func(collection, baseIteratee(predicate, 3)); |
| 49 | } |
| 50 | |
| 51 | module.exports = some; |