[kylemaxwell]

"Competant [sic] developers, even those who don’t specialize in JS, should be able to answer this question in 5-6 minutes. Therefore, this is a quick filter."

This is a false statement. I have programmed for years, but never in Javascript, so I have no clue what "add a cache to a Javascript function" even means. I can quite easily write code "that determines if a number is prime", but the assumption that everybody knows JS even if they don't "specialize" in it is problematic from my PoV.

[cgag]

I think it just means add memoization, I don't think there's anything javascript specific about it.

[thirdhaf]

If you want to implement it in a general way you still need to know how javascript supports closures though.

[seabee]

The question actually has nothing to do with JavaScript specifically, it's not much more than 'do you know what memoization is' if I understood it correctly.

[gscott]

I wonder if H1B hires have to go through this process. Does anyone go to India and ask people if they know how to cache an item in Javascript?