javascript - 处理来自控制台的nodeJs输入？

Question

我还是 nodeJs 的新手，我正在尝试创建一个输入流，但是一旦我通过调用 node fileName 在终端中启动应用程序，我的代码就无法正常工作。

我的输入格式是这样的:

- N the number of queries.
- second line represent a string containing two words separated by a space.
- N lines of a string containing two words separated by a space.

出于某种原因，终端没有显示任何东西。

这是我的代码:

'use strict';
const fs = require('fs');
var n = 0;
var position = '';
var destination = '';
var array = [];


process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.replace(/\s*$/, '')
        .split('\n')
        .map(str => str.replace(/\s*$/, ''));

    main();
});

function readLine() {
    return inputString[currentLine++];
}
function main() {
    const ws = fs.createWriteStream(process.env.OUTPUT_PATH);


    const s =  parseInt(readLine(), 10);

    const input= readLine().split(' ');

    position = input[0] ;
    destination = input[1];

    console.log('our number is',s, 'and our position and destination:', position, destination);

    ws.end();
}

Answer 1

您可以通过允许 readline 缓冲输入来简化整个过程:

'use strict';

const readline = require('readline');

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

rl.on('line', line => {
    rl.write(
        line.replace(/\s*$/, '')
    );
});