1 | import baseIteratee from './_baseIteratee.js';
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2 | import baseWhile from './_baseWhile.js';
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3 |
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4 | /**
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5 | * Creates a slice of `array` with elements taken from the beginning. Elements
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6 | * are taken until `predicate` returns falsey. The predicate is invoked with
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7 | * three arguments: (value, index, array).
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8 | *
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9 | * @static
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10 | * @memberOf _
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11 | * @since 3.0.0
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12 | * @category Array
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13 | * @param {Array} array The array to query.
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14 | * @param {Function} [predicate=_.identity] The function invoked per iteration.
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15 | * @returns {Array} Returns the slice of `array`.
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16 | * @example
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17 | *
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18 | * var users = [
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19 | * { 'user': 'barney', 'active': false },
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20 | * { 'user': 'fred', 'active': false },
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21 | * { 'user': 'pebbles', 'active': true }
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22 | * ];
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23 | *
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24 | * _.takeWhile(users, function(o) { return !o.active; });
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25 | * // => objects for ['barney', 'fred']
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26 | *
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27 | * // The `_.matches` iteratee shorthand.
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28 | * _.takeWhile(users, { 'user': 'barney', 'active': false });
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29 | * // => objects for ['barney']
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30 | *
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31 | * // The `_.matchesProperty` iteratee shorthand.
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32 | * _.takeWhile(users, ['active', false]);
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33 | * // => objects for ['barney', 'fred']
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34 | *
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35 | * // The `_.property` iteratee shorthand.
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36 | * _.takeWhile(users, 'active');
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37 | * // => []
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38 | */
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39 | function takeWhile(array, predicate) {
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40 | return (array && array.length)
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41 | ? baseWhile(array, baseIteratee(predicate, 3))
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42 | : [];
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43 | }
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44 |
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45 | export default takeWhile;
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