Splits, sorts and joins a string by a separator

ssj.sh

#!/bin/bash
#    A Bash/Ruby script that splits, sorts and joins a string
#    Copyright (C) 2015 Christoph "criztovyl" Schulz
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
[ "$1" == "--help" ] || [ "$1" == "help" ] || [ "$1" == "-h" ] && 
{
    echo "Usage: ./ssj SEPARATOR"
    echo "Splits, sorts and joins a string."
    exit
}

sep="$1"

[ ! "$sep" ] && {
mapfile -t ha <<< "`xclip -o | grep -o .`"
j=50
[ $j -lt ${#ha[@]} ] && echo ${ha[@]:0:$j} || echo ${ha[@]}
echo "Search delimiter, use a to navigate left and d do navigate right. Accept with return."
for ((i=0; i<${#ha[@]}; )); do 
    read -sn1 drct
    case $drct in 
        "a")
            [ $i -gt -${#ha[@]} ] && i=$((--i)) && do=1 || echo -ne "\r"$(tput el)"\rend"
            ;;
        "d")
            [ $((i+1)) -lt ${#ha[@]} ] && i=$((++i)) && do=1 || echo -ne "\r"$(tput el)"\rend"
            ;;
        *) 
            [ ! "$drct" ] && char=${ha[$i]} && break || echo -ne "\r"$(tput el)"\rinvalid"
            ;;
    esac
    [ "$do" ] && echo -ne "\r"$(tput el)"\r${ha[$i]}, $i" && do=
    char=${ha[$i]}
done 
echo Char: "$char, pos $i"
sep="nil"
sep_from_string="if sep.nil?; sep=line[$i] end; ";
} || sep="'$sep'"

xclip -o | ruby -e "sep=$sep; \$stdin.each { |line| $sep_from_string puts line.split(sep).sort.join(sep)}"