Being fairly new to Houdini I would like sometimes to see actual examples for implementing a vex function instead of just the description in the docs.
Is there a place online that has small snippets of code explaining how to use each function? that would help me tremendously.

There's quite a few nice examples by googling "Houdini Vex"

Just in case you're not aware of it:
Not a library as such, but arguably the best 'learning vex' resource - with many, many practical examples:
https://tokeru.com/cgwiki/ [tokeru.com]