On Wednesday, 1 May 2024 at 10:01:29 UTC, Nick Treleaven wrote:
>On Tuesday, 30 April 2024 at 17:01:42 UTC, Basile B. wrote:
>Generally there is a strong correlation between default initialization and boolean evaluation to false
.
But the meaning of boolean evaluation of a number is to check if it is non-zero. That is well established from C.
Without looking it up, if x
is -0.0
, does !x
evaluate to true
or false
?
Hint: Negative zero compares equal to zero (x == 0.0
), but it’s not zero: x !is 0.0
.
Possibly after looking it up, does the answer make sense to you?
Even if you’re 100% sure, would you bet most D programmers get it right?