From 06cf9467341911cc728691594f25be45f2352ec1 Mon Sep 17 00:00:00 2001
From: ida <ida@is.nota.live>
Date: Fri, 8 Dec 2023 19:56:32 -0700
Subject: [PATCH] comment
---
day4.sh | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/day4.sh b/day4.sh
index 619e36e..336a338 100755
--- a/day4.sh
+++ b/day4.sh
@@ -2,21 +2,21 @@
#set -vx
declare -a game
while read card; do
- echo $card
- c="$(echo "${card%\:*}" | tr -cd [:digit:])"
- game[$c]=${game[$c]:-0}
+ echo $card # show what's being processed
+ c="$(echo "${card%\:*}" | tr -cd [:digit:])" # grab the game number
+ game[$c]=${game[$c]:-0} # set wins to zero if game isnt initialized
while read win; do
while read num; do
- if [[ $num == $win ]] && [[ $num != "" ]];
+ if [[ $num == $win ]] && [[ $num != "" ]]; # check if number matches a winning number
then
- (( game[$c]++ ))
+ (( game[$c]++ )) # increment win count for game
fi
- done < <( echo -n "${card#*\:}" | cut -d '|' -f 2 | tr ' ' '\n' | sed '/^$/d' )
+ done < <( echo -n "${card#*\:}" | cut -d '|' -f 2 | tr ' ' '\n' | sed '/^$/d' ) # seperate scractcher numbers (delimiting by newline)
- done < <( echo -n "${card#*\:}" | cut -d '|' -f 1 | tr ' ' '\n' | sed '/^$/d' )
+ done < <( echo -n "${card#*\:}" | cut -d '|' -f 1 | tr ' ' '\n' | sed '/^$/d' ) # seperate winning numbers
-done< <( cat $1 )
+done< <( cat $1 ) # file input
for wins in ${game[@]}; do
- echo $(( 2**($wins-1) ))
+ echo $(( 2**($wins-1) )) # calculate score for all games
done | tr '\n' '+' | sed 's/+$/\n/' | bc