'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/iterator-create-proxy'); var IteratorProxy = createIteratorProxy(function (arg) { var iterator = this.iterator; var next = this.next; var result, done; while (this.remaining) { this.remaining--; result = anObject(next.call(iterator)); done = this.done = !!result.done; if (done) return; } result = anObject(next.call(iterator, arg)); done = this.done = !!result.done; if (!done) return result.value; }); $({ target: 'Iterator', proto: true, real: true }, { drop: function drop(limit) { return new IteratorProxy({ iterator: anObject(this), remaining: toPositiveInteger(limit) }); } });