How are you to determine that "burritoes" (sic) is a replacement for "tacos" ?? What are the rules that determine that, without also determining that "Do" is a replacement for "I"?
in reply to Diff between two arrays
I'm sure you have an END RESULT in mind (ie. why are you trying to do this?), and you are currently trying to solve a problem that is getting in the way of your solution... if you can say what you are trying to achieve, likely you'll find there somebody has a better SOLUTION so that you won't have to solve this problem you are dealing with.