[philbarr]

I actually don't think he should remove the second argument until the entire thing has been verified in tests. What if it was actually:

  masterList[a].list2.length()

..but he misread it as

  masterList[z].list2.length()

and so removed it..?

[pmr_]

You are saying that you actually need to read and understand code you are refactoring. Hard to disagree.