in reply to ||= (poorly documented?)

Yep, that is right and it works the way it reads. 
perl -e "my $shoo = 50; $shoo ||= 100; print $shoo;"

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Prints 
50

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Should be the same as, 
perl -e "$shoo=50; $shoo = ($shoo)?50 : 100;print $shoo;"

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If you scroll down in perlop you'll see that style used to describe what // does, so they appear to be equivalent.

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Re^2: ||= (poorly documented?)
by frozenwithjoy (Priest) on Jul 09, 2012 at 06:47 UTC
    If you scroll down in perlop you'll see that style used to describe what // does, so they appear to be equivalent.
    || tests for truthiness (and, therefore, definedness), whereas // only tests for definedness.
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