Question

function findCount(req,res, s){
     count = s.length; //count was not initialized! Causes problems.
     res.send(count);
}

In Node.js, this code causes problems when there are a lot of hits, since I didn’t add “var” before count.

I’m afraid that I forget to add var to initialize my variables.

Is there a way to scan my code and determine, for each function, which variables were not initaizlied?

Better yet: Is there a way to automatically initialize all variables inside each function?

Answer 1

Have you used JSLint? It parses J-script for you, it’s very useful. You can find the online version here.

It would give you something like :

“Problem at line 1 character 1: ‘count’ was used before it was defined”

Hope that’s what you’re after