package.modules.findKey.js Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of underscore Show documentation

JavaScript's functional programming helper library.

The newest version!

import cb from './_cb.js';
import keys from './keys.js';

// Returns the first key on an object that passes a truth test.
export default function findKey(obj, predicate, context) {
  predicate = cb(predicate, context);
  var _keys = keys(obj), key;
  for (var i = 0, length = _keys.length; i < length; i++) {
    key = _keys[i];
    if (predicate(obj[key], key, obj)) return key;
  }
}