You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
26 lines
1.0 KiB
26 lines
1.0 KiB
'use strict'; |
|
var $ = require('../internals/export'); |
|
var getBuiltIn = require('../internals/get-built-in'); |
|
var call = require('../internals/function-call'); |
|
var aCallable = require('../internals/a-callable'); |
|
var isCallable = require('../internals/is-callable'); |
|
var anObject = require('../internals/an-object'); |
|
var getIterator = require('../internals/get-iterator'); |
|
var iterate = require('../internals/iterate'); |
|
|
|
// `Set.prototype.isSubsetOf` method |
|
// https://tc39.github.io/proposal-set-methods/#Set.prototype.isSubsetOf |
|
$({ target: 'Set', proto: true, real: true, forced: true }, { |
|
isSubsetOf: function isSubsetOf(iterable) { |
|
var iterator = getIterator(this); |
|
var otherSet = anObject(iterable); |
|
var hasCheck = otherSet.has; |
|
if (!isCallable(hasCheck)) { |
|
otherSet = new (getBuiltIn('Set'))(iterable); |
|
hasCheck = aCallable(otherSet.has); |
|
} |
|
return !iterate(iterator, function (value, stop) { |
|
if (call(hasCheck, otherSet, value) === false) return stop(); |
|
}, { IS_ITERATOR: true, INTERRUPTED: true }).stopped; |
|
} |
|
});
|
|
|