unminify it

Author: cgsdev0

2025/day06/p2-golf-unmin.sh

@@ -0,0 +1,36 @@
+# noglob creates problems because of '*' in input,
+# so we turn it off
+set -o noglob
+
+# read our input line by line into an array
+mapfile -t arr
+
+# find dimensions of puzzle
+width=${#arr}
+height=${#arr[@]}-1
+symbol_row=$height
+
+for((row=0; row<width; ++row))
+do
+ # peek ahead at the symbols row
+ next=${arr[symbol_row]:row:2}
+
+ # gross hacks that make lots of warnings but work fine
+ $next || operator=$_
+
+ # we set operator to '_' which is a placeholder for newline later
+ ${next:1} || operator=_
+
+ # loop over all the columns
+ for((col=0; col<height; col++))
+ do
+ # print the number without a line break
+ printf ${arr[col]:row:1}
+ done
+
+ # join the column with an operator
+ printf $operator
+done \
+ | sed 's/. *_/+/g' \
+ | sed 's/$/0\n/' \
+ | bc