stdio

Module for input/output management with nodejs.

Installation

To install the most recent release from npm, run:

npm install stdio

Usage

You can do many things with this module

Read standard input at once

var stdio = require('stdio');
stdio.read(function(data){
    console.log(data);
});

Parse Unix-like command line options

var stdio = require('stdio');
var ops = stdio.getopt({
    'check': {key: 'c', args: 2},
    'map': {key: 'm'},
    'kaka': {key: 'k', args: 2},
    'ooo': {key: 'o'}
});
console.log(ops);

If you run the previous example with the command

node pruebas.js -c 23 45 88 --map -k 23 44 cosa

Program output will be:

{ check: { args: [ '23', '45' ] },
  args: [ '88', 'cosa' ],
  map: true,
  kaka: { args: [ '23', '44' ] } }

So you can check options:

if(ops.map){
    // Your action
}
if(ops.kaka){
    // Your action, using ops.kaka[0] or ops.kaka[1] or...
}

Printf-like output

This simple line:

stdio.printf('example %d: %s is %j\n', 2, 'any', {a: 2, b: [0, 2, 8], c: 'str'});

will produce the following output:

example 2: any is {"a":2,"b":[0,2,8],"c":"str"}

You can use %s for strings, %d for numbers (integer or floating-point ones), and %j for JSON objects.