esnext.set.difference.js 833 B

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  1. 'use strict';
  2. var $ = require('../internals/export');
  3. var getBuiltIn = require('../internals/get-built-in');
  4. var call = require('../internals/function-call');
  5. var aCallable = require('../internals/a-callable');
  6. var anObject = require('../internals/an-object');
  7. var speciesConstructor = require('../internals/species-constructor');
  8. var iterate = require('../internals/iterate');
  9. // `Set.prototype.difference` method
  10. // https://github.com/tc39/proposal-set-methods
  11. $({ target: 'Set', proto: true, real: true, forced: true }, {
  12. difference: function difference(iterable) {
  13. var set = anObject(this);
  14. var newSet = new (speciesConstructor(set, getBuiltIn('Set')))(set);
  15. var remover = aCallable(newSet['delete']);
  16. iterate(iterable, function (value) {
  17. call(remover, newSet, value);
  18. });
  19. return newSet;
  20. }
  21. });