I'd recommend against using the negation operator to return a positive value for true, not so much because there no guarantee that it will continue to do so, but because the reader probably won't know it returns positive for true. (Especially since some languages use a negative value for true!) It's not like $x && 1 or $x ?1:0 would be a burden to use instead of !!$x.

In reply to Re^2: Complex conditional sort by ikegami
in thread Complex conditional sort by Zhris

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