23 lines
832 B
JavaScript
23 lines
832 B
JavaScript
|
'use strict';
|
||
|
|
var $ = require('../internals/export');
|
||
|
|
var IS_PURE = require('../internals/is-pure');
|
||
|
|
var getBuiltIn = require('../internals/get-built-in');
|
||
|
|
var anObject = require('../internals/an-object');
|
||
|
|
var aFunction = require('../internals/a-function');
|
||
|
|
var speciesConstructor = require('../internals/species-constructor');
|
||
|
|
var iterate = require('../internals/iterate');
|
||
|
|
|
||
|
|
// `Set.prototype.difference` method
|
||
|
|
// https://github.com/tc39/proposal-set-methods
|
||
|
|
$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, {
|
||
|
|
difference: function difference(iterable) {
|
||
|
|
var set = anObject(this);
|
||
|
|
var newSet = new (speciesConstructor(set, getBuiltIn('Set')))(set);
|
||
|
|
var remover = aFunction(newSet['delete']);
|
||
|
|
iterate(iterable, function (value) {
|
||
|
|
remover.call(newSet, value);
|
||
|
|
});
|
||
|
|
return newSet;
|
||
|
|
}
|
||
|
|
});
|