_.findIndex(array, [predicate=_.identity], [fromIndex=0])
This method is like _.find except that it returns the index of the first element predicate returns truthy for instead of the element itself.
Since
1.1.0
Arguments
-
array(Array): The array to inspect. -
[predicate=_.identity](Function): The function invoked per iteration. -
[fromIndex=0](number): The index to search from.
Returns
(number): Returns the index of the found element, else -1.
Example
var users = [
{ 'user': 'barney', 'active': false },
{ 'user': 'fred', 'active': false },
{ 'user': 'pebbles', 'active': true }
];
_.findIndex(users, function(o) { return o.user == 'barney'; });
// => 0
// The `_.matches` iteratee shorthand.
_.findIndex(users, { 'user': 'fred', 'active': false });
// => 1
// The `_.matchesProperty` iteratee shorthand.
_.findIndex(users, ['active', false]);
// => 0
// The `_.property` iteratee shorthand.
_.findIndex(users, 'active');
// => 2
Please login to continue.