solved part 2

day08/solution2.rb

@@ -0,0 +1,40 @@
+#!/bin/env ruby
+
+def run_code (instructions)
+    acc = 0
+    tracker = Array.new(instructions.length, false)
+    i = 0
+    success = false
+    while tracker[i] == false do
+        tracker[i] = true
+        case instructions[i][0..2]
+        when 'acc'
+            acc += instructions[i].split(' ')[1].to_i
+            i += 1
+        when 'jmp'
+            i += instructions[i].split(' ')[1].to_i
+        when 'nop'
+            i += 1
+        end
+        success = true if i == instructions.length
+    end
+    return success, acc, tracker
+end
+
+input = File.readlines('./input').to_ary.map(&:strip)
+succ, acc, tracker = false, 0, []
+
+input.each.with_index do |instruction, i|
+    mod = input.map(&:clone)
+    if instruction[0..2] == 'jmp'
+        mod[i][0..2] = 'nop'
+    elsif instruction[0..2] == 'nop'
+        mod[i][0..2] = 'jmp'
+    else
+        next
+    end
+    succ, acc, tracker = run_code(mod)
+    break if succ == true
+end
+
+p acc