【已解决】如何一行一行地并按顺序地读取两个文件?我用readline写的代码有问题,不知道为什么? - CNode技术社区

const readline = require('readline');
const fs = require('fs');
function main() {
 const rl1 = readline.createInterface({
 input: fs.createReadStream(process.argv[2])
 });
 const rl2 = readline.createInterface({
 input: fs.createReadStream(process.argv[3])
 });
 const flag = process.argv[4];
 let whitelist = [];
 const tlist = [];
 rl1.on('line', line => {
 whitelist.push(Number(line));
 }).on('close', () => {
 whitelist = whitelist.sort((a, b) => a - b);
 rl2.on('line', line => {
 const key = Number(line);
 tlist.push(key);
 if (flag === '+') {
 if (binarySearch(key, whitelist) < 0) {
 // console.log(key);
 }
 } else if (flag === '-') {
 if (binarySearch(key, whitelist) > -1) {
 // console.log(key);
 }
 }
 }).on('close', () => {
 console.log(tlist.length);
 });
 });
}
main();

以上代码,当第二个参数是一个小文件(18行)时,tlist是个空的数组,当第二个参数是一个大文件(1000万行)时,tlist的长度却是9220850