> Certainly you will remember the difference now, after writing this. Indeed, part of my motivation for writing this was to remember it. I have spent too much

> Certainly you will remember the difference now, after writing this. Indeed, part of my motivation for writing this was to remember it. I have spent too much time thinking about what shift() vs. unshift() do. The other part was that I wanted to know how others figure out when to use shift() and when to use unshift(). Thanks for everybody for your suggestions.