_.takeWhile(array, [predicate=_.identity])
Creates a slice of array with elements taken from the beginning. Elements are taken until predicate returns falsey. The predicate is invoked with three arguments: (value, index, array).
Since
3.0.0
Arguments
-
array(Array): The array to query. -
[predicate=_.identity](Function): The function invoked per iteration.
Returns
(Array): Returns the slice of array.
Example
var users = [
{ 'user': 'barney', 'active': false },
{ 'user': 'fred', 'active': false},
{ 'user': 'pebbles', 'active': true }
];
_.takeWhile(users, function(o) { return !o.active; });
// => objects for ['barney', 'fred']
// The `_.matches` iteratee shorthand.
_.takeWhile(users, { 'user': 'barney', 'active': false });
// => objects for ['barney']
// The `_.matchesProperty` iteratee shorthand.
_.takeWhile(users, ['active', false]);
// => objects for ['barney', 'fred']
// The `_.property` iteratee shorthand.
_.takeWhile(users, 'active');
// => []
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