17 lines
578 B
JavaScript
17 lines
578 B
JavaScript
'use strict';
|
|
var aSet = require('../internals/a-set');
|
|
var size = require('../internals/set-size');
|
|
var iterate = require('../internals/set-iterate');
|
|
var getSetRecord = require('../internals/get-set-record');
|
|
|
|
// `Set.prototype.isSubsetOf` method
|
|
// https://tc39.github.io/proposal-set-methods/#Set.prototype.isSubsetOf
|
|
module.exports = function isSubsetOf(other) {
|
|
var O = aSet(this);
|
|
var otherRec = getSetRecord(other);
|
|
if (size(O) > otherRec.size) return false;
|
|
return iterate(O, function (e) {
|
|
if (!otherRec.includes(e)) return false;
|
|
}, true) !== false;
|
|
};
|