> rather, an intermediate string is being built up during this process, and the intermediate string is copied to the original string

I think you're right

  DB<123> $x=join "",a..j
 => "abcdefghij"
 
  DB<124> $x =~ s/(.)(?=(.))/$2$1/g
 => 9
 
  DB<125> $x
 => "bacbdcedfegfhgihjij"

[download]

Cheers Rolf

In reply to Re^2: rotate a vector with a regex? by LanX
in thread rotate a vector with a regex? by misterperl

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