Re: Error "Can't use an undefined value as a HASH reference" while working with generated objects

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Re^2: Error "Can't use an undefined value as a HASH reference" while working with generated objects by HJO (Acolyte) on Oct 11, 2012 at 09:41 UTC
Hi McA, Waow, thanks it worked perfectly, but could you just please explain it to me ^^" I'm unused to your use of : `? %{$values[0][0]} : ();`	[reply] [d/l]
Re^3: Error "Can't use an undefined value as a HASH reference" while working with generated objects by Anonymous Monk on Oct 11, 2012 at 10:04 UTC
`my %valeur; if( @values and defined $values[0] and 'ARRAY' eq ref $values[0] and defined $values[0][0] and 'HASH' eq ref $values[0][0] ) { %valeur = %{ $values[0][0] }; }` [download] `my %valeur; if ( my $want = Dive( \@values, qw/ 0 0 / ){ %valeur = %$want; }` [download]	[reply] [d/l] [select]
Re^4: Error "Can't use an undefined value as a HASH reference" while working with generated objects by tobyink (Canon) on Oct 11, 2012 at 14:03 UTC
The Data::Diver example will die if $values[0][0] is defined and true but not a hashref - e.g. if it's an arrayref. `use Data::Diver 'Dive'; use Scalar::Does 'does'; if (my $want = Dive( \@values, qw/ 0 0 / )) { %valeur = %$want if does($want, 'HASH'); }` [download] `perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'`	[reply] [d/l]
Re^4: Error "Can't use an undefined value as a HASH reference" while working with generated objects by HJO (Acolyte) on Oct 11, 2012 at 10:28 UTC
Waow thanks, I really didn't push the `defined` so far ... I just tested it (the first method, I'm having some trouble with your second, some undeclared varibles...), It's working as well, thanks	[reply] [d/l]
Re^5: Error "Can't use an undefined value as a HASH reference" while working with generated objects by Anonymous Monk on Oct 11, 2012 at 10:46 UTC
Re^6: Error "Can't use an undefined value as a HASH reference" while working with generated objects by HJO (Acolyte) on Oct 12, 2012 at 07:27 UTC
Re^3: Error "Can't use an undefined value as a HASH reference" while working with generated objects by McA (Priest) on Oct 12, 2012 at 09:07 UTC
Hi! Sorry for the late reply: Please have a look at http://perldoc.perl.org/perlop.html#Conditional-Operator . This operator is also known as triadic operator. It's a kind of if-then-else-operator. Hope it helps Best regards McA	[reply]
Re^4: Error "Can't use an undefined value as a HASH reference" while working with generated objects by HJO (Acolyte) on Oct 12, 2012 at 10:12 UTC
Hi, Not a problem, I just though you didn't see my reply ^^" Well thanks, it's a little easier to understand now with some documentation. Thanks again for your answers Regards, HJO	[reply]


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