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- 'use strict';
- var objectKeys = Object.keys || function (obj) {
- var keys = [];
- for (var key in obj) {
- keys.push(key);
- }return keys;
- };
- module.exports = Duplex;
- var processNextTick = require('process-nextick-args');
- var util = require('core-util-is');
- util.inherits = require('inherits');
- var Readable = require('./_stream_readable');
- var Writable = require('./_stream_writable');
- util.inherits(Duplex, Readable);
- var keys = objectKeys(Writable.prototype);
- for (var v = 0; v < keys.length; v++) {
- var method = keys[v];
- if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
- }
- function Duplex(options) {
- if (!(this instanceof Duplex)) return new Duplex(options);
- Readable.call(this, options);
- Writable.call(this, options);
- if (options && options.readable === false) this.readable = false;
- if (options && options.writable === false) this.writable = false;
- this.allowHalfOpen = true;
- if (options && options.allowHalfOpen === false) this.allowHalfOpen = false;
- this.once('end', onend);
- }
- function onend() {
-
-
- if (this.allowHalfOpen || this._writableState.ended) return;
-
-
- processNextTick(onEndNT, this);
- }
- function onEndNT(self) {
- self.end();
- }
- function forEach(xs, f) {
- for (var i = 0, l = xs.length; i < l; i++) {
- f(xs[i], i);
- }
- }
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