Re: The mystery of double bitwise negation


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Re: The mystery of double bitwise negation

by BrowserUk (Patriarch)

on Jul 12, 2015 at 18:04 UTC ( #1134411=note: print w/replies, xml )

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in reply to The mystery of double bitwise negation

I'd say that the first one was completely pointless. Double bit-wise inversion of the constant 1 serves no purpose at all:

C:\test>perl -MDevel::Peek -le" my($m,$n) = (1,~~1); print Dump($m), '
+ ', Dump( $n )"
SV = IV(0x2ca374) at 0x15501c
  REFCNT = 1
  FLAGS = (PADBUSY,PADMY,IOK,pIOK)
  IV = 1
SV = IV(0x2ca378) at 0x155010
  REFCNT = 1
  FLAGS = (PADBUSY,PADMY,IOK,pIOK)
  IV = 1
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The second is a golfed version of scalar. Why? No idea.

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