extract info line by line with Node.js (usage: node extract.js <ln.txt > result-ln.txt)

extract.js

const readline = require('readline');

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

const processLine = (line)=>{
	var is_wu = false, is_mai=false;
	if(line.search(/[^轻]雾/) !== -1){
		is_wu = true;
		//console.log(line);
		//break;
	}
	if(line.search(/霾/) !== -1){
		is_mai = true;
		//console.log(line);
		//break;
	}
	
	if(is_wu || is_mai){
		console.log(is_wu+' '+is_mai+' '+ (is_wu&&is_mai) +' '+line);
	}
}

rl.on('line', (input) => {
  processLine(input);
});