2018/day1b.sh

   1 declare -a array
   2 offset=100000
   3 sum=0
   4 array[offset]=1
   5 iter=0
   6 while :; do
   7     echo $((iter++))
   8 while read number; do
   9     # echo
  10     # echo $number
  11     : $(( sum += number ))
  12     # echo $(( sum ))
  13     if test "${array[offset + sum]:+set}" = set; then
  14         echo done: $sum
  15         exit
  16     else
  17         # echo first time
  18         array[offset + sum]=1
  19     fi
  20 done < ${1:-input1}
  21 done