.takeWhile(array, [predicate=.identity])

sourcenpm package

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');
// => []