blob: 81a927d386bdeec5d9a4b6c65333bb2c9a7185d4 [file] [log] [blame]
'use strict';
// https://github.com/tc39/proposal-iterator-helpers
var $ = require('../internals/export');
var anObject = require('../internals/an-object');
var toPositiveInteger = require('../internals/to-positive-integer');
var createIteratorProxy = require('../internals/create-iterator-proxy');
var IteratorProxy = createIteratorProxy(function (arg) {
if (!this.remaining--) {
this.done = true;
return;
}
var result = anObject(this.next.call(this.iterator, arg));
var done = this.done = !!result.done;
if (!done) return result.value;
});
$({ target: 'Iterator', proto: true, real: true }, {
take: function take(limit) {
return new IteratorProxy({
iterator: anObject(this),
remaining: toPositiveInteger(limit)
});
}
});