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