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Re: Problem printing return value from a subroutine

by chromatic (Archbishop)
on Oct 04, 2012 at 03:58 UTC ( #997173=note: print w/replies, xml ) Need Help??

in reply to Problem printing return value from a subroutine

induced() returns a list flattened from an array. my $qw=induced(@{ $subgraphs[$d-1] }); evaluates that return value in scalar context. If you want to return a scalar, you should join the elements of the array. If you want to return a list, you need to capture it as an array or something which provides list context.

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Re^2: Problem printing return value from a subroutine
by zing (Beadle) on Oct 04, 2012 at 08:10 UTC
    But the problem chromatic is this :-
    component 2 = e d induced=3 component 1 = c b a b c a induced=3
    For component 2 (e d),, there shouldn't be any return value,as there is no line in data which has these vertices. Whereas for component 1(c b a), the first line of data file (b c a) should be returned.

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