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[–] badkangaroo ago 

i often see in a for loop (;;++i) or (;;i++) someone suggesting that ++i was better for some reason, any ideas why?

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[–] skruf [S] 0 points 1 point (+1|-0) ago  (edited ago)

Even though modern compilers optimize for either of these uses, I'm sure, the idea was that when post-incrementing (i++), 'i' here will return the value and then increment it, which apparently takes more time than pre-increment (++i) where you would increment and then get the new value.

Actually, I'm in the habit of pre-increment in the for-loops, I think it's more of an uncontrolled obsession than anything else...

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[–] WhiteMakesRight 1 point -1 points (+0|-1) ago  (edited ago)

It makes zero difference which of the two you use as the third expression in a for loop. Whenever you see someone prescribing rules without explaining their reasoning, it's a good idea to disregard everything they say.