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esnext.set.filter.js
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esnext.set.filter.js
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'use strict';
var $ = require('../internals/export');
var bind = require('../internals/function-bind-context');
var aSet = require('../internals/a-set');
var SetHelpers = require('../internals/set-helpers');
var iterate = require('../internals/set-iterate');
var Set = SetHelpers.Set;
var add = SetHelpers.add;
// `Set.prototype.filter` method
// https://github.com/tc39/proposal-collection-methods
$({ target: 'Set', proto: true, real: true, forced: true }, {
filter: function filter(callbackfn /* , thisArg */) {
var set = aSet(this);
var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined);
var newSet = new Set();
iterate(set, function (value) {
if (boundFunction(value, value, set)) add(newSet, value);
});
return newSet;
}
});