esnext.set.is-subset-of.js 1.1 KB

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  1. 'use strict';
  2. var IS_PURE = require('../internals/is-pure');
  3. var $ = require('../internals/export');
  4. var getBuiltIn = require('../internals/get-built-in');
  5. var call = require('../internals/function-call');
  6. var aCallable = require('../internals/a-callable');
  7. var isCallable = require('../internals/is-callable');
  8. var anObject = require('../internals/an-object');
  9. var getIterator = require('../internals/get-iterator');
  10. var iterate = require('../internals/iterate');
  11. // `Set.prototype.isSubsetOf` method
  12. // https://tc39.github.io/proposal-set-methods/#Set.prototype.isSubsetOf
  13. $({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {
  14. isSubsetOf: function isSubsetOf(iterable) {
  15. var iterator = getIterator(this);
  16. var otherSet = anObject(iterable);
  17. var hasCheck = otherSet.has;
  18. if (!isCallable(hasCheck)) {
  19. otherSet = new (getBuiltIn('Set'))(iterable);
  20. hasCheck = aCallable(otherSet.has);
  21. }
  22. return !iterate(iterator, function (value, stop) {
  23. if (call(hasCheck, otherSet, value) === false) return stop();
  24. }, { IS_ITERATOR: true, INTERRUPTED: true }).stopped;
  25. }
  26. });