Function findKey

This method is like find except that it returns the key of the first element predicate returns truthy for instead of the element itself.

Since

5.2.0

See

[[find]], [[findIndex]], [[findLast]], [[findLastIndex]], [[findLastKey]]

Example

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

findKey(users, ({ age }) => age < 40)
// => 'barney' (iteration order is not guaranteed)
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