# enables cycling through the directory stack using
  # Ctrl+Shift+Left/Right
  #
  # left/right direction follows the order in which directories
  # were visited, like left/right arrows do in a browser
  
  # NO_PUSHD_MINUS syntax:
  #  pushd +N: start counting from left of `dirs' output
  #  pushd -N: start counting from right of `dirs' output

  switch-to-dir () {
  	while ! builtin pushd -q $1 &>/dev/null; do
  		# We found a missing directory: pop it out of the dir stack
  		builtin popd -q $1
  
  		# Stop trying if there are no more directories in the dir stack
  		[[ ${#dirstack} -eq 0 ]] && break
  	done
  }

  insert-cycledleft () {
  	emulate -L zsh
  	setopt nopushdminus

  	switch-to-dir +1

  	zle reset-prompt
  }
  zle -N insert-cycledleft
  
  insert-cycledright () {
  	emulate -L zsh
  	setopt nopushdminus

  	switch-to-dir -0

  	zle reset-prompt
  }
  zle -N insert-cycledright

  # These sequences work for xterm, Apple Terminal.app, and probably others.
  # Not for rxvt-unicode, but it doesn't seem differentiate Ctrl-Shift-Arrow
  # from plain Shift-Arrow, at least by default.
  # iTerm2 does not have these key combinations defined by default; you will need
  # to add them under "Keys" in your profile if you want to use this. You can do
  # this conveniently by loading the "xterm with Numeric Keypad" preset.
  bindkey "\e[1;6D" insert-cycledleft
  bindkey "\e[1;6C" insert-cycledright