_baseFindKey.js 747B

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  1. /**
  2. * The base implementation of methods like `_.findKey` and `_.findLastKey`,
  3. * without support for iteratee shorthands, which iterates over `collection`
  4. * using `eachFunc`.
  5. *
  6. * @private
  7. * @param {Array|Object} collection The collection to inspect.
  8. * @param {Function} predicate The function invoked per iteration.
  9. * @param {Function} eachFunc The function to iterate over `collection`.
  10. * @returns {*} Returns the found element or its key, else `undefined`.
  11. */
  12. function baseFindKey(collection, predicate, eachFunc) {
  13. var result;
  14. eachFunc(collection, function(value, key, collection) {
  15. if (predicate(value, key, collection)) {
  16. result = key;
  17. return false;
  18. }
  19. });
  20. return result;
  21. }
  22. module.exports = baseFindKey;