ColdFusion - Var Scoping.

A couple of days ago I was making a little program to recursively list files in sub-directories.
In doing so I ran into a good example of why var scoping is so important.

File structure:

Non var scoped code:


Non var scoped results:

However when I properly var scoped the variables. 

var scoped code:

var scoped results:

In simple terms, when the function is being run the second time, ColdFusion is being lazy. Instead of making and declaring a new variable it is using the old one. Adding var scoping will make sure that whenever the function is run the variables are scoped to that instance of the function.