Install Node

brew install nvm #install the node version manager

# Make sure it gets loaded every time a terminal starts
echo "source $(brew --prefix nvm)/nvm.sh" >> ~/.bash_profile 

# Break down!
# echo means print out what follows
# $(brew --prefix nvm) will get evaluated as if you typed it in to a command line.
# >> ~.bash_profile means: add whatever the left hand side of >> evaluated to, to the end of the ~/.bash_profile file. 
# ~: means home directory.
# ~/.bash_profile is a file which runs every time you start a new terminal.
# Whole thing. Add "source <whatever brew --prefix nvm evals to>>/nvm.sh" to the end of the <home_dir>/.bash_profile file.
# you can see what happened by running cat ~/.bash_profile (the last line of that file you just added).



nvm install v4.2.1 #install the latest version of node