invert.js 739 B

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  1. var constant = require('./constant'),
  2. createInverter = require('./_createInverter'),
  3. identity = require('./identity');
  4. /**
  5. * Creates an object composed of the inverted keys and values of `object`.
  6. * If `object` contains duplicate values, subsequent values overwrite
  7. * property assignments of previous values.
  8. *
  9. * @static
  10. * @memberOf _
  11. * @since 0.7.0
  12. * @category Object
  13. * @param {Object} object The object to invert.
  14. * @returns {Object} Returns the new inverted object.
  15. * @example
  16. *
  17. * var object = { 'a': 1, 'b': 2, 'c': 1 };
  18. *
  19. * _.invert(object);
  20. * // => { '1': 'c', '2': 'b' }
  21. */
  22. var invert = createInverter(function(result, value, key) {
  23. result[value] = key;
  24. }, constant(identity));
  25. module.exports = invert;