How do I completely uninstall Node.js, and reinstall from beginning (Mac OS X)

Question

My version of node is always v0.6.1-pre even after I install brew node and NVM install v0.6.19.

My node version is:

Answer 1

I have summarized the existing answers and made sure Node.js is COMPLETELY ERASED along with NPM.

Lines to copy to terminal:

brew uninstall node;
which node;
sudo rm -rf /usr/local/bin/node;
sudo rm -rf /usr/local/lib/node_modules/npm/;
brew doctor;
brew cleanup --prune-prefix;