Function CD

#function cd from https://www.cygwin.com/
    cd_func ()
# {
#   local x2 the_new_dir adir index
#   local -i cnt
#
#   if [[ $1 ==  "--" ]]; then
#     dirs -v
#     return 0
#   fi
#
#   the_new_dir=$1
#   [[ -z $1 ]] && the_new_dir=$HOME
#
#   if [[ ${the_new_dir:0:1} == '-' ]]; then
#     #
#     # Extract dir N from dirs
#     index=${the_new_dir:1}
#     [[ -z $index ]] && index=1
#     adir=$(dirs +$index)
#     [[ -z $adir ]] && return 1
#     the_new_dir=$adir
#   fi
#
#   #
#   # '~' has to be substituted by ${HOME}
#   [[ ${the_new_dir:0:1} == '~' ]] && the_new_dir="${HOME}${the_new_dir:1}"
#
#   #
#   # Now change to the new dir and add to the top of the stack
#   pushd "${the_new_dir}" > /dev/null
#   [[ $? -ne 0 ]] && return 1
#   the_new_dir=$(pwd)
#
#   #
#   # Trim down everything beyond 11th entry
#   popd -n +11 2>/dev/null 1>/dev/null
#
#   #
#   # Remove any other occurence of this dir, skipping the top of the stack
#   for ((cnt=1; cnt <= 10; cnt++)); do
#     x2=$(dirs +${cnt} 2>/dev/null)
#     [[ $? -ne 0 ]] && return 0
#     [[ ${x2:0:1} == '~' ]] && x2="${HOME}${x2:1}"
#     if [[ "${x2}" == "${the_new_dir}" ]]; then
#       popd -n +$cnt 2>/dev/null 1>/dev/null
#       cnt=cnt-1
#     fi
#   done
#
#   return 0
# }
#
# alias cd=cd_func