Javascript 使用'获取错误；继承'；使用node.js v5.10.1

在实践中尝试从book Node.js运行简单脚本时，我遇到以下错误

我不确定是什么导致了这个错误。我尽我所能寻找解释，但我找不到。util.inherit模块在v5.10.1中不工作吗？还是我错过了什么？我是node.js的新手

~/node-project$ node index.js
util.js:786
    throw new TypeError('The super constructor to `inherits` must not ' +
    ^

TypeError: The super constructor to `inherits` must not be null or undefined.
    at Object.exports.inherits (util.js:786:11)
    at Object.<anonymous> (/Users/byoungdale/node-project/countstream.js:6:6)
    at Module._compile (module.js:413:34)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at Module.require (module.js:367:17)
    at require (internal/module.js:16:19)
    at Object.<anonymous> (/Users/byoungdale/node-project/index.js:1:81)
    at Module._compile (module.js:413:34)

countstream.js

var Writable = require('stream').Writeable;
var util = require('util');

module.exports = CountStream;

util.inherits(CountStream, Writable);

function CountStream(matchText,options) {
  Writeable.call(this, options);
  this.count = 0;
  this.matcher = new RegExp(matchText, 'ig');
}

CountStream.prototype._write = function(chunk, encoding, cb) {
  var matches = chuck.toString().match(this.matcher);
  if (matches) {
   this.count += matches.length;
  }
  cb();
};

CountStream.prototype.end = function() {
  this.emit('total', this.count);
};

---

你可以试试这个。如果这对你有用的话

---

var Writeable=require（'stream'）。可写

可写的

应该是

可写的

，而且你可能很好。（从一些谷歌搜索中，它看起来像是过去使用的一些模块，

Writeable

，但现在不再使用了。）干杯。这个错误只是意味着

Writeable

未定义-

继承

一如既往地工作。

var Writable = require('stream').Writeable;
var util = require('util');

module.exports = CountStream;

util.inherits(CountStream, Writable);

function CountStream(matchText,options) {
  Writeable.call(this, options);
  this.count = 0;
  this.matcher = new RegExp(matchText, 'ig');
}

CountStream.prototype._write = function(chunk, encoding, cb) {
  var matches = chuck.toString().match(this.matcher);
  if (matches) {
   this.count += matches.length;
  }
  cb();
};

CountStream.prototype.end = function() {
  this.emit('total', this.count);
};