oh-my-zsh editor plugin

editor.plugin.zsh

# Quick shortcut to the specified editor ($EDITOR).
# Adapted from @holman's .dotfiles.
#
# To install:
#   Copy script to $ZSH/custom/plugins/editor/editor.plugin.zsh
#   Add `editor` to the list of plugins included by oh-my-zsh
#
# If you're not using oh-my-zsh, you can just drop this in your shell profile
#   (e.g. ~/.zshrc, ~/.bash_profile, etc)
#
# USAGE:
#
#   $ e
#   # => opens the current directory in your editor
#
#   $ e .
#   $ e /usr/local
#   # => opens the specified directory in your editor

function e() {
  if [ "$1" = "" ] ; then
    "$EDITOR" .
  else
    "$EDITOR" "$1"
  fi
}