Switch to older version of node, and to current

gistfile1.sh

# Switch to older version (e.g.:  v0.10.39)
sudo n 0.10.39
  #   install : node-v0.10.39
  #     mkdir : /usr/local/n/versions/node/0.10.39
  #     fetch : https://nodejs.org/dist/v0.10.39/node-v0.10.39-darwin-x64.tar.gz
  # installed : v0.10.39
  
# Switch to current version
sudo n stable
  #   install : node-v0.12.5
  #     mkdir : /usr/local/n/versions/node/0.12.5
  #     fetch : https://nodejs.org/dist/v0.12.5/node-v0.12.5-darwin-x64.tar.gz
  # installed : v0.12.5
node -v
# v0.12.5