Function findLastKey

  • findLastKey<V>(object: Record<string, V>, predicate?: Predicate<V>): string

  • This method is like findKey except that it iterates over elements of a collection in the opposite order.

    Type Parameters

    • V

    Parameters

    • object: Record<string, V>

      The object to inspect.

    • Optionalpredicate: Predicate<V>

      The function invoked per iteration.

    Returns string

    Returns the key of the matched element, else undefined.

    Since

    5.2.0

    Example

    var users = {
      'barney':  { 'age': 36, 'active': true },
      'fred':    { 'age': 40, 'active': false },
      'pebbles': { 'age': 1,  'active': true }
    };

    findLastKey(users, function(o) { return o.age < 40; });
    // => returns 'pebbles' assuming `findKey` returns 'barney'

    // The `matches` iteratee shorthand.
    findLastKey(users, { 'age': 36, 'active': true });
    // => 'barney'

    // The `matchesProperty` iteratee shorthand.
    findLastKey(users, ['active', false]);
    // => 'fred'

    // The `property` iteratee shorthand.
    findLastKey(users, 'active');
    // => 'pebbles'
  • findLastKey(object: any, predicate?: any[]): string

  • This method is like findKey except that it iterates over elements of a collection in the opposite order.

    Parameters

    • object: any

      The object to inspect.

    • Optionalpredicate: any[]

      The function invoked per iteration.

    Returns string

    Returns the key of the matched element, else undefined.

    Since

    5.2.0

    Example

    var users = {
      'barney':  { 'age': 36, 'active': true },
      'fred':    { 'age': 40, 'active': false },
      'pebbles': { 'age': 1,  'active': true }
    };

    findLastKey(users, function(o) { return o.age < 40; });
    // => returns 'pebbles' assuming `findKey` returns 'barney'

    // The `matches` iteratee shorthand.
    findLastKey(users, { 'age': 36, 'active': true });
    // => 'barney'

    // The `matchesProperty` iteratee shorthand.
    findLastKey(users, ['active', false]);
    // => 'fred'

    // The `property` iteratee shorthand.
    findLastKey(users, 'active');
    // => 'pebbles'
  • findLastKey(object: any, predicate?: string): string

  • This method is like findKey except that it iterates over elements of a collection in the opposite order.

    Parameters

    • object: any

      The object to inspect.

    • Optionalpredicate: string

      The function invoked per iteration.

    Returns string

    Returns the key of the matched element, else undefined.

    Since

    5.2.0

    Example

    var users = {
      'barney':  { 'age': 36, 'active': true },
      'fred':    { 'age': 40, 'active': false },
      'pebbles': { 'age': 1,  'active': true }
    };

    findLastKey(users, function(o) { return o.age < 40; });
    // => returns 'pebbles' assuming `findKey` returns 'barney'

    // The `matches` iteratee shorthand.
    findLastKey(users, { 'age': 36, 'active': true });
    // => 'barney'

    // The `matchesProperty` iteratee shorthand.
    findLastKey(users, ['active', false]);
    // => 'fred'

    // The `property` iteratee shorthand.
    findLastKey(users, 'active');
    // => 'pebbles'

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