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56 lines
1.8 KiB
56 lines
1.8 KiB
import arrayEvery from './_arrayEvery.js'; |
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import baseEvery from './_baseEvery.js'; |
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import baseIteratee from './_baseIteratee.js'; |
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import isArray from './isArray.js'; |
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import isIterateeCall from './_isIterateeCall.js'; |
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/** |
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* Checks if `predicate` returns truthy for **all** elements of `collection`. |
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* Iteration is stopped once `predicate` returns falsey. The predicate is |
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* invoked with three arguments: (value, index|key, collection). |
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* |
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* **Note:** This method returns `true` for |
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* [empty collections](https://en.wikipedia.org/wiki/Empty_set) because |
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* [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of |
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* elements of empty collections. |
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* |
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* @static |
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* @memberOf _ |
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* @since 0.1.0 |
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* @category Collection |
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* @param {Array|Object} collection The collection to iterate over. |
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* @param {Function} [predicate=_.identity] The function invoked per iteration. |
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* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`. |
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* @returns {boolean} Returns `true` if all elements pass the predicate check, |
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* else `false`. |
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* @example |
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* |
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* _.every([true, 1, null, 'yes'], Boolean); |
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* // => false |
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* |
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* var users = [ |
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* { 'user': 'barney', 'age': 36, 'active': false }, |
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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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* _.every(users, { 'user': 'barney', 'active': false }); |
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* // => false |
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* |
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* // The `_.matchesProperty` iteratee shorthand. |
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* _.every(users, ['active', false]); |
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* // => true |
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* |
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* // The `_.property` iteratee shorthand. |
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* _.every(users, 'active'); |
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* // => false |
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*/ |
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function every(collection, predicate, guard) { |
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var func = isArray(collection) ? arrayEvery : baseEvery; |
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if (guard && isIterateeCall(collection, predicate, guard)) { |
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predicate = undefined; |
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} |
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return func(collection, baseIteratee(predicate, 3)); |
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} |
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export default every;
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