Working part 1 build

2024/day-8/solution-1.sh

@@ -19,7 +19,7 @@ do
     fi
     done
   )"
-  printf "%s\n" "$LINE" >&2
+  #printf "%s\n" "$LINE" >&2
   read -r -a IDX_ARRAY <<< "$LINE"
   #printf "idx:  %s " "${IDX_ARRAY[@]}" >&2
   #printf "\n" >&2
@@ -32,17 +32,27 @@ do
     do
       B=${IDX_ARRAY[j]}
       DIFF=$(( B - A ))
+      VDIFF=$(( (B / LEN) - (A / LEN) ))
       HEAD=$(( A - DIFF ))
       TAIL=$(( B + DIFF ))
-      printf "char: %s, i: %s, j: %s, DIFF: %s, HEAD: %s, TAIL: %s\n"  "$CHAR" "$A" "$B" "$DIFF" "$HEAD" "$TAIL" >&2
-      for VALUE in $HEAD $TAIL
-      do
-        if [[ $VALUE -gt ${#MAP_ARRAY[@]} ]] || [[ $VALUE -lt 0 ]]
+      HEADVDIFF=$(( (A / LEN) - (HEAD / LEN) ))
+      TAILVDIFF=$(( (TAIL / LEN) - (B / LEN) ))
+      printf "char: %s, A: %s, B: %s, DIFF: %s, VDIFF: %s, HEAD: %s, HEADVDIFF: %s, TAIL: %s, TAILVDIFF: %s\n"  "$CHAR" "$A" "$B" "$DIFF" "$VDIFF" "$HEAD" "$HEADVDIFF" "$TAIL" "$TAILVDIFF" >&2
+      # Check if out of bounds
+      if [[ $HEAD -lt ${#MAP_ARRAY[@]} ]] && \
+         [[ $HEAD -ge 0 ]] && \
+         [[ $HEADVDIFF -eq $VDIFF ]]
       then
-          continue
+        SHADOW_ARRAY[HEAD]=X # Mark on shadow map
+        echo $VALUE >> values
+      fi
+      if [[ $TAIL -lt ${#MAP_ARRAY[@]} ]] && \
+         [[ $TAIL -ge 0 ]] && \
+         [[ $TAILVDIFF -eq $VDIFF ]]
+      then
+        SHADOW_ARRAY[TAIL]=X # Mark on shadow map
+        echo $VALUE >> values
       fi
-	SHADOW_ARRAY[VALUE]=X # Mark on shadow map
-      done
     done
   done
   unset IDX_ARRAY