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• set-is-disjoint-from.js

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package.internals.set-is-disjoint-from.js Maven / Gradle / Ivy

'use strict';
var aSet = require('../internals/a-set');
var has = require('../internals/set-helpers').has;
var size = require('../internals/set-size');
var getSetRecord = require('../internals/get-set-record');
var iterateSet = require('../internals/set-iterate');
var iterateSimple = require('../internals/iterate-simple');
var iteratorClose = require('../internals/iterator-close');

// `Set.prototype.isDisjointFrom` method
// https://tc39.github.io/proposal-set-methods/#Set.prototype.isDisjointFrom
module.exports = function isDisjointFrom(other) {
  var O = aSet(this);
  var otherRec = getSetRecord(other);
  if (size(O) <= otherRec.size) return iterateSet(O, function (e) {
    if (otherRec.includes(e)) return false;
  }, true) !== false;
  var iterator = otherRec.getIterator();
  return iterateSimple(iterator, function (e) {
    if (has(O, e)) return iteratorClose(iterator, 'normal', false);
  }) !== false;
};