Re: defined{ness}

2009/3/17 Chas. Owens : > On Tue, Mar 17, 2009 at 09:30, Dermot wrote: > snip >> if ($x{$x})  inspects the key's value, not simply the existence of a key? > snip > > Yes, but beware of autovivification (i.e. the creating of keys by > trying to look at their values).  You are safe with this simple

Re: defined{ness}

On Tue, Mar 17, 2009 at 09:30, Dermot wrote: snip > if ($x{$x})  inspects the key's value, not simply the existence of a key? snip Yes, but beware of autovivification (i.e. the creating of keys by trying to look at their values). You are safe with this simple case, but when dealing with HoHs or

Re: defined{ness}

2009/3/17 Jay Savage : > On Tue, Mar 17, 2009 at 8:16 AM, Dermot wrote: >> Hi All, >> >> I am unsure if the following statement is going to do what I want. >> >> I want to test if there is a value in $hash_ref{'someval'} NOT if the >> key is defined. I'd also like to avoid un-sightly "undefined va

Re: defined{ness}

On Tue, Mar 17, 2009 at 8:16 AM, Dermot wrote: > Hi All, > > I am unsure if the following statement is going to do what I want. > > I want to test if there is a value in $hash_ref{'someval'} NOT if the > key is defined. I'd also like to avoid un-sightly "undefined value" > errors. Hi Dermot, It

Re: defined{ness}

Dermot : Hi All, I am unsure if the following statement is going to do what I want. I want to test if there is a value in $hash_ref{'someval'} NOT if the key is defined. I'd also like to avoid un-sightly "undefined value" errors. So which of the following is best: if (defined($hash_ref{'some

defined{ness}

Hi All, I am unsure if the following statement is going to do what I want. I want to test if there is a value in $hash_ref{'someval'} NOT if the key is defined. I'd also like to avoid un-sightly "undefined value" errors. So which of the following is best: if (defined($hash_ref{'someval'}) {}