Yeah I'm not saying the JS do while is not useful in a "run at least once" way - but it just doesn't read logically at all to me. Reading the code it feels like it says "do a thing while X is true" - but that's not what it means. It really means "do a thing once and then do it while X is true". It feels like a useful hack :)
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@jaywink javascript probably wouldn't have it had they not just taken it from c/java. I wonder where it originated. https://en.m.wikipedia.org/wiki/Do_while_loop
