day02/get_valid_count_2.sh

   1 #!/bin/bash
   2
   3 check_file() {
   4     cat input.txt | while read line; do
   5         password=${line#*: }
   6         params=${line%: *}
   7         min=${params%-*}
   8         params=${params#*-}
   9         max=${params% *}
  10         char=${params#* }
  11         count=0
  12         min=$((min-1))
  13         max=$((max-1))
  14         if [ "${password:$min:1}" = "$char" ] || [ "${password:$max:1}" = "$char" ]; then
  15             if [ "${password:$min:1}" != "${password:$max:1}" ]; then
  16                 echo "Got valid line! $line"
  17             fi
  18         fi
  19     done
  20 }
  21
  22 echo "Got $(check_file | wc -l) valid lines"
  23
  24 exit 0