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Re^4: More efficient dereferencing of a subroutine return

by parv (Priest)
on Feb 18, 2013 at 00:05 UTC ( #1019241=note: print w/ replies, xml ) Need Help??


in reply to Re^3: More efficient dereferencing of a subroutine return
in thread More efficient dereferencing of a subroutine return

Did you, and the one before you, missed the part where I wrote about the case of undef being returned, as in ...

use strict; my @p = @{ list() }; sub list { return undef; }

...?


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Re^5: More efficient dereferencing of a subroutine return
by Anonymous Monk on Feb 18, 2013 at 00:24 UTC

    That is what you said, but look at the OP's code, its always  return \@array which can never be undef

    an empty array is better than undef

      It seems you and I read the representation of the problem differently. Your reply presumes that every return from sub is always a return of an array reference. (If that promise is made to the user of the sub, then I have no disagreement with direct dereferencing of the return value.) I think of the value returned being an array reference where possible; else, nothing or undef is returned.

        Look, no temporaries, no fatal :) my @stuff = eval { @{ func() } };

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