1#!/usr/bin/env node
 2var argv = require('optimist')
 3    .usage('Count the lines in a file.\nUsage: $0')
 4    .demand('f')
 5    .alias('f', 'file')
 6    .describe('f', 'Load a file')
 7    .argv
 8;
 9
10var fs = require('fs');
11var s = fs.createReadStream(argv.file);
12
13var lines = 0;
14s.on('data', function (buf) {
15    lines += buf.toString().match(/\n/g).length;
16});
17
18s.on('end', function () {
19    console.log(lines);
20});