npm_wcat
A module that prints a file's contents, and appends line numbers to each line on the way to process.stdout
to install
npm install -g wcat
to use , pass in a filename as a cmd line argument
wcat filename.txt
example terminal output
mark@squirtle:~/wcat$ wcat ./lib/wcat.js
1 //wcat.js
2 exports.wcat = function(filename){
3
4 if(!filename){
5 console.log("Please supply a filename as a command line argument.");
6 process.exit(0);
7 }
8
9 var fs = require("fs");
10 var through = require("through");
11 var split = require("split");
12 var lineNum = 0;
13 var prependLineWithNumber = function(buf){
14 lineNum++;
15 this.queue( lineNum + "\t " + buf.toString() + "\n");
16 }
17 var readable = fs.createReadStream(filename)
18 .pipe(split())
19 .pipe(through(prependLineWithNumber))
20 .pipe(process.stdout);
21
22 }