Function findKey

Alias

findKey<T>(obj, predicate): keyof T | undefined
Finds the key of the first element in the object that satisfies the provided testing function.
Type Parameters
- T extends Record<any, any>
Parameters
- obj: T
  The object to search.
- predicate: ((value: T[keyof T], key: keyof T, obj: T) => boolean)
  The function to execute on each value in the object. It takes three arguments:
  - value: The current value being processed in the object.
  - key: The key of the current value being processed in the object.
  - obj: The object that findKey was called upon.
  - - (value, key, obj): boolean
    - Parameters
      value: T[keyof T]
      key: keyof T
      obj: T
      Returns boolean
Returns keyof T | undefined
The key of the first element in the object that passes the test, or undefined if no element passes.
Example
```
const users = {
  'barney':  { 'age': 36, 'active': true },
  'fred':    { 'age': 40, 'active': false },
  'pebbles': { 'age': 1,  'active': true }
};
findKey(users, function(o) { return o.age < 40; }); => 'barney'
```
- Defined in src/object.ts:193