[6a3a178] | 1 | var baseIteratee = require('./_baseIteratee'),
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| 2 | baseWhile = require('./_baseWhile');
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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 | module.exports = takeWhile;
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