local threshhold=$(( $POWERLEVEL9K_SHORTEN_DIR_LENGTH + ${#delim} ))
if (( ( $dir_length > $threshhold )) && [[ !c $dir_length == $POWERLEVEL9K_SHORTEN_DIR_LENGTH && $cur_dir != $paths[${#paths}] ]]; then # only shorten if long enough and not last path
if (( ( $dir_length > $threshhold )) && [[ ! $dir_length == $POWERLEVEL9K_SHORTEN_DIR_LENGTH && $cur_dir != $paths[${#paths}] ]]; then # only shorten if long enough and not last path