[2019][ruby] explain the 3

5 years ago · 33786055b9
parent a577d0b72c
commit 33786055b9
1 changed files with 1 additions and 1 deletions
--- a/2019/ruby/computer.rb
+++ b/2019/ruby/computer.rb
@ -94,7 +94,7 @@ class Computer
        opcode = OPCODES.fetch(instruction[-2..-1].to_i)
        @pc += 1

-        n = opcode.arity - 3
+        n = opcode.arity - 3 # subtract the memory, input, and output params
        args = (0...n).map {|i|
          mode = instruction[2-i] { ?0 }
          value = @memory.fetch(@pc + i) || 0