solve day8 from 2020

2020/Day8.1/day8.rb

@@ -0,0 +1,36 @@
+file = File.open('input.txt')
+input = file.read.split("\n")
+
+i = 0
+result = 0
+command_history = []
+while i < input.length
+    pp "#{input[i]} #{i} #{result}"
+    if command_history.include?(i)
+        break
+    end
+    command = input[i].scan(/[a-zA-Z]+/)[0]
+    number = input[i].scan(/[0-9]+/)[0].to_i
+    operator = input[i].scan(/\+|\-/)[0]
+    case command
+    when "acc"
+        command_history.append(i)
+        if operator == "+"
+            result = result + number
+        else
+            result = result - number
+        end
+        i = i + 1
+    when "jmp"
+        command_history.append(i)
+        if operator == "+"
+            i = i + number
+        else
+            i = i - number
+        end
+    when "nop"
+        command_history.append(i)
+        i = i + 1
+    end
+end
+pp result