Implement day 4 in Terraform

2024/bonus/day04/check_point/check_xmas/main.tf

@@ -0,0 +1,27 @@
+variable "grid" {
+  type = list(string)
+}
+
+variable "x" {
+  type = number
+}
+
+variable "y" {
+  type = number
+}
+
+variable "dx" {
+  type = number
+}
+
+variable "dy" {
+  type = number
+}
+
+locals {
+  match = [for i in range(4) : var.x + i * var.dx >= 0 && try(substr(var.grid[var.y + i * var.dy], var.x + i * var.dx, 1), "F") == substr("XMAS", i, 1)]
+}
+
+output "found" {
+  value = alltrue(local.match) ? 1 : 0
+}