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A comment on Ask HN: What are some cool but obscure data structures you know about?. Parent comment

Re:Ask HN: What are some cool but obscure data structures yo... by ninkendo on Friday July 22, 2022 @01:55PM (#32195024)
Hmm, why set `taskDictionary[urlString] = nil` at the bottom there? If the whole point is to cache the result, isn't the point to leave the value there for other requests to pick it up?
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Re:Ask HN: What are some cool but obscure data structures yo... by Ryuuke5 on Friday July 22, 2022 @02:36PM (#32195567)
Yup, nice catch, no need to reset it to nil if you wanna keep it in memory indefinitely.

I guess making it nil can be also used if you don't wanna make the same request when there is one already in flight, in case you have a 403 error and need to request a refresh token, you don't wanna make two simultaneous requests, but you also don't wanna catch it indefinitely either.

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