node . js write stream . move cursor()方法
原文:https://www . geesforgeks . org/node-js-write stream-move cursor-method/
writeStream.moveCursor() 方法是 tty 模块内类 writeStream 的内置应用编程接口，用于相对于其当前位置移动写流对象的光标。
语法:
const writeStream.moveCursor(dx, dy[, callback])
参数:该方法取以下参数:
- DX: The coordinate of the X axis relative to the current coordinate.
- dy: Y-axis coordinate relative to the current coordinate.
- Callback: Callback function executed after operation.
返回值:如果写流对象的光标相对于其当前位置移动，则该方法返回布尔值 true。
示例 1: 文件名:index.js
java 描述语言
// Node.js program to demonstrate the
// writeStream.moveCursor() method
// 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;
// Moving cursor to with respect
// to previous position by using
// moveCursor() method
const col = WriteStream.moveCursor(10, 7, ()=>{
});
// 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("cursor is moved :- ",
0, 26, 1234, "localhost");
输出:
cursor is moved :- true
示例 2: 文件名:index . js
Javascript
// Node.js program to demonstrate the
// writeStream.moveCursor() method
// Creating and initializing a
// WriteStream object
let WriteStream = process.stdout;
// Moving cursor to with respect to
// previous position by using
// moveCursor() method
const col = WriteStream.moveCursor(10, 7, ()=>{
});
// Displaying the result
console.log("cursor is moved :- " + col);
使用以下命令运行 index.js 文件:
node index.js
输出:
cursor is moved :- true
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