02.sh - aoc22 - 2022 Advent of Code
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       02.sh (587B)
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            1 #!/bin/sh
            2 
            3 priority() {
            4         case "$1" in
            5         [a-z]) python -c "print(ord('$1') - 96)" ;;
            6         [A-Z]) python -c "print(ord('$1') - 38)" ;;
            7         esac
            8 }
            9 
           10 answer=0
           11 
           12 while read -r line0; read -r line1; read -r line2; do
           13         ffd="$(mktemp)"
           14         sfd="$(mktemp)"
           15         tfd="$(mktemp)"
           16         tmp="$(mktemp)"
           17 
           18         echo "$line0" | fold -w1 | sort -u > "$ffd"
           19         echo "$line1" | fold -w1 | sort -u > "$sfd"
           20         echo "$line2" | fold -w1 | sort -u > "$tfd"
           21 
           22         comm -12 "$ffd" "$sfd" | sort -u > "$tmp"
           23 
           24         prio="$(priority "$(comm -12 "$tmp" "$tfd")")"
           25 
           26         answer="$(( answer + prio ))"
           27 
           28         rm -f "$ffd" "$sfd" "$tfd" "$tmp"
           29 done
           30 
           31 echo "$answer"