Re^2: reliably test integer size for portable bit-fiddling? (~0)

Beautiful use of the Maths. ;)

Dave

Comment on Re^2: reliably test integer size for portable bit-fiddling? (~0)

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Re^3: reliably test integer size for portable bit-fiddling? (~0) by Anonymous Monk on Dec 09, 2014 at 00:53 UTC
cough `$ perl -E " say log(~0)/log(2) " 31.9999999996641 $ perl -E " say int 0.999+log(~0)/log(2) " 32` [download]	[reply] [d/l]
Re^4: reliably test integer size for portable bit-fiddling? (~0) by tye (Sage) on Dec 10, 2014 at 15:34 UTC
`$ perl -le "print log(~0+1)/log(2)" 32` [download] or, to be safe `$ perl -e 'printf "%.0f\n", log(~0+1)/log(2)' 32` [download] - tye	[reply] [d/l] [select]