pipeTo(writableStream); }); 2、实时日志记录 在Web应用程序中,你可能需要实时记录用户的行为或系统日志。 // 创建一个WritableStream,用于写入日志文件 const logStream = new WritableStream({ write(chunk) { // 将日志数据写入到服务器或文件系统 console.log(chunk); //
全局的 console 是一个特殊的 Console 实例,它的输出会发送到process.stdout和process.stderr。 相当于调用: new Console(process.stdout, process.stderr); console.assert(value[, message][, ...args]) 新增于: v0.1.101 value <any> message <any> ...args <any> 一个简单的断言测试,验证 value 是否...
在node.js开发中,需要将日志重定向到文件,又不想用其他日志框架,查询node文档发现可以用如下方式简单实现: 代码语言: 代码运行次数: constoutput=fs.createWriteStream('./stdout.log');consterrorOutput=fs.createWriteStream('./stderr.log');// 自定义日志对象constlogger=newConsole({stdout:output,stderr:err...
settings={'show_sidebar':true,'show_icons':false},settingsFile=path.join(nw.App.dataPath,'mySettings.json');fs.writeFileSync(settingsFile,JSON.stringify(settings));fs.readFile(settingsFile,'utf8',(err,data)=>{varsaved=JSON.parse(data);console.log(saved);});...
The console should now display[0, 4, 8, 12, 16]. That was easy, wasn't it? Let's break done what we've done: turbojs.run's first parameter is the previously allocated memory. The second parameter is the code that will be executed for each value in the array. ...
} function ReadLineFromElement(fromElement, textMessage, defaultValue, idName) { } // // Console Writing Methods // function Write(message) { ... } function WriteLine(message) { ... } function WriteToElement(message, toElement) { ... } function WriteLineToElement(message, toElement) { ...
Innode, enable debug logs by setting theDEBUGenvironment variable to the name of the module you want to debug (e.g.bittorrent-protocol, or*to printall logs). DEBUG=* webtorrent In thebrowser, enable debug logs by running this in the developer console: ...
{"firstName":"Marcos","lastName":"Silva","email":"marcos.henrique@toptal.com","password":"s3cr3tp4sswo4rd"}) }) .then(function(response) {returnresponse.json(); }) .then(function(data) {console.log('Request succeeded with JSON response', data); }) .catch(function(error) {console...
resolve(3); console.log(c); }).catch(function(err){ console.error(err.stack); }); So, this example shows how to write asynchronous code without callbacks using ES6 generators. ES7 takes this approach one step further by introducing the async and await keywords, and removing the need ...
console.log(process.argv) 执行node命令 node argv.js node argv.js --name zhu ## 输出 [ '/usr/local/bin/node', ## 执行当前脚本的Node二进制文件的绝对路径 '/Users/zhuhuilong/Node/Book/argv.js', ## 文件的绝对路径 '--name', ## 其余参数 ...