How to read from stdin line by line in Node

Question

I\'m looking to process a text file with node using a command line call like:

node app.js < input.txt

Each line of the file needs to be proce

Answer 1

readline is specifically designed to work with terminal (that is process.stdin.isTTY === true). There are a lot of modules which provide split functionality for generic streams, like split. It makes things super-easy:

process.stdin.pipe(require('split')()).on('data', processLine)

function processLine (line) {
  console.log(line + '!')
}