Node.js writeStream.rows 属性

writeStream.rows属性是 tty 模块中 WriteStream 类的内置应用程序编程接口，用于获取此写入 Stream 对象具有的行数。

句法：

const writeStream.rows

参数：此属性不包含任何参数。

返回值：此属性返回此写入 Stream 对象具有的行数。

示例 1：文件名：index.js

// Node.js program to demonstrate the
// writeStream.rows property
  
// Importing dgram module
var dgram = require('dgram');
  
// Creating and initializing client
// and server socket
var client = dgram.createSocket("udp4");
var server = dgram.createSocket("udp4");
  
// Handling the message event
server.on("message", function (msg) {
  
  // Creating and initializing a
  // WriteStream object
  let WriteStream = process.stdout;
  
  // Getting number of rows
  // by using rows API
  const col = WriteStream.rows;
  
  // Displaying the result
  process.stdout.write(msg + col);
  
  // Exiting process
  process.exit();
})
// Binding server with port
.bind(1234, () => {
});
  
// Client sending message to server
client.send("Number of rows :- ",
        0, 21, 1234, "localhost");

输出：

Number of rows :- 10

示例 2：文件名：index.js

// Node.js program to demonstrate the
// writeStream.rows property
  
// Creating and initializing a
// WriteStream object
let WriteStream = process.stdout;
  
// Getting number of rows
// by using rows API
const col = WriteStream.rows;
  
// Displaying the result
console.log("Number of rows :- " + col);

使用以下命令运行 index.js 文件：

node index.js

输出：

Number of rows :- 10

参考：https://nodejs.org/dist/latest-v12.x/docs/api/tty.html#tty_writestream_rows