day 10, wren

d10-wren/main.wren

@@ -0,0 +1,53 @@
+import "aoc" for AoC
+
+class CPU {
+    construct new() {
+        _cycle = 0
+        _x = 1
+
+        _every20 = 0
+        _str = ""
+    }
+
+    every20 { _every20 }
+    str { _str }
+
+    tick() {
+        _cycle = _cycle + 1
+        if(_cycle % 40 == 20) {
+            _every20 = _every20 + _x * _cycle
+        }
+        var px = _cycle % 40
+        if(px == _x || px == _x + 1 || px == _x + 2) {
+            _str = _str + "#"
+        } else {
+            _str = _str + "."
+        }
+        if(_cycle % 40 == 0) {
+            _str = _str + "\n"
+        }
+    }
+
+    noop() {
+        tick()
+    }
+
+    addx(x) {
+        tick()
+        tick()
+        _x = _x + x
+    }
+}
+
+var cpu = CPU.new()
+
+for(line in AoC.input.split("\n").where {|l| l != ""}) {
+    if(line == "noop") {
+        cpu.noop()
+    } else {
+        cpu.addx(Num.fromString(line.split(" ")[1]))
+    }
+}
+
+System.print(cpu.every20)
+System.print(cpu.str)