I am trying to use homebrew as much as possible. What\'s the suggested way to install the following on OS X?
I agree with noa -- if you need to have multiple versions of node, io.js then brew is not the appropriate solution.
You can help beta-test io.js support in nvm: https://github.com/creationix/nvm/pull/616
If you just want io.js and are not switching versions, then you can install the binary distribution of io.js from https://iojs.org/dist/v1.0.2/iojs-v1.0.2-darwin-x64.tar.gz ; that includes npm and you will not need nvm if you are not switching versions.
Remember to update npm after installing: sudo npm install -g npm@latest