javascript - Looping through the text file in typescript -

i have read local file flight.txt

1 dfw bom 2016-05-20 12:20 2016-05-21 02:40 1084.00 jetairways 100 2 dfw del 2016-04-24 17:15 2016-04-25 07:20 1234.00 lufthansa 100 3 dfw fra 2016-06-05 13:30 2016-06-05 03:32 674.00 americanairlines 100 

code used read file in typescript.

 populateflightlist() {    let data = fs.readfilesync('flight.txt').tostring('utf-8'); {         let textbyline = data.split("\n")         console.log(textbyline);      }; 

now want loop , read file , parse data flight objects creating new object in each iteration , adding arraylist.

   try {         scanner fin = new scanner(file);                         while(fin.hasnext()) {           int number = fin.nextint();                 //flight numer           string = fin.next();                   //departure airport           string = fin.next(); //arrival airport     }**code in java** 

how do in typescript?

you can use readline module read 1 line @ time. parsing data still manual affair:

import * fs 'fs'; import * rd 'readline'  var reader = rd.createinterface(fs.createreadstream("w:\\tmp\\stack\\2\\data.txt"))  var data: array<{ number: number; from: string; to: string}> = []; reader.on("line", (l: string) => {     var tokens = l.split(' ');     var nr= parseint(tokens[0]);     var = tokens[1];     var = tokens[2]     console.log(`nr: ${nr} ${from} ${to}`);     data.push({         number: nr, from,     }); }) console.log(`will empty data has not yet been read ${data.length}` );  reader.on("close", ()=> {     console.log(`data has been read ${data.length}` );     data.foreach(element => {         console.log(`nr: ${element.number} ${element.from} ${element.to}`)     }); }) 

the line event triggered once each line. close event trigger after entire file has been read , file closed, entire data set available, build 1 entry @ time, each time line event occurs.

for more readline module consult documentation