diff für Inhalt von Variablen und Arrays . 2 Beispiele in Bash

diff_array.sh

/bin/bash
#für arrays
a=(1 2 3)
b=(1 2 5)
unset ia;for i in "${a[@]}";do ia="$ia$i\n"; done
unset ib;for i in "${b[@]}";do ib="$ib$i\n"; done
diff <( echo -e "$ia" ) <( echo -e "$ib" )

diff_v.sh

#!/bin/bash
# für Variablen
a="1
2
3"
b="1
2
4"
diff <( echo "$a" ) <( echo "$b" )