alias pjo="pj open"
  
  pj () {
      emulate -L zsh

      cmd="cd"

      project=$1

      if [[ "open" == "$project" ]]; then

          shift

          project=$*
          cmd=${=EDITOR}

      else

          project=$*

      fi

      for basedir ($PROJECT_PATHS); do
          if [[ -d "$basedir/$project" ]]; then
              $cmd "$basedir/$project"

              return
          fi
      done

      echo "No such project '${project}'."

  }

  _pj () {
      emulate -L zsh

      typeset -a projects

      for basedir ($PROJECT_PATHS); do
          projects+=(${basedir}/*(/N))
      done

      compadd ${projects:t}
  }

  compdef _pj pj