Debugging module throw errors? - node.js

Question

I just started messing with node.js and I'm already having problems, I have no idea how to even start debugging this..
> npm install express jade socket.io
module.js:333
throw err;
^
Error: Cannot find module 'cookie-jar'
at Function.Module._resolveFilename (module.js:331:15)
at Function.Module._load (module.js:273:25)
at Module.require (module.js:357:17)
at require (module.js:373:17)
at Object.<anonymous> (/usr/local/Cellar/node/0.10.24/lib/node_modules/npm/node_modules/request/index.js:15:14)
at Module._compile (module.js:449:26)
at Object.Module._extensions..js (module.js:467:10)
at Module.load (module.js:349:32)
at Function.Module._load (module.js:305:12)
at Module.require (module.js:357:17)

Answer 1

If you want to just use npm just install each package with a separate command
npm install express
npm install jade
npm install socket.io
On my computer it works.
My suggestion is to use the "package.json" file. In that file you can specify the libraries you need and it's going to download the dependencies for you.
For example
{
"name": "myapp",
"version": "0.0.1",
"author": "Alvise Susmel <alvise#50pixels.com>",
"dependencies": {
"jade": "*",
"express": "*",
"socket.io": "*"
}
}
and just execute
npm install
And npm will make all for you. It will create a "node_modules" where there are the dependencies.
Just create your js files in the same directory of "node_modules" and the dependencies will be all available to be included.
As you can see in the package.json file, near every dependency, there is a " * ", that means "all versions". If you want, you can set a specific version.
If you want to know more about this, that's a useful link: https://npmjs.org/doc/json.html