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John Carmack on mutable variables

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498 points azhenley | 1 comments | 31 Oct 25 02:34 UTC | HN request time: 0.301s | source
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TheRoque ◴[31 Oct 25 14:07 UTC] No.45772138[source]▶
I also default to const in javascript. Somehow a "let" variable feels so dirty, but I don't really know why. I guess at this point my experience forged an instinct but I can't even put a theory on it. But it's sometimes necessary and I use it of course.
replies(2): >>45772627 #>>45773213 #
1. catlifeonmars ◴[31 Oct 25 14:53 UTC] No.45772627[source]▶
In JS, by using const, you are signalling to the reader that they don’t need to look out for a reassignment to understand the code. If you use let, you are saying the opposite.