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Re: NULL Variables

by Limbic~Region (Chancellor)
on Feb 04, 2004 at 18:16 UTC ( [id://326544]=note: print w/replies, xml ) Need Help??


in reply to NULL Variables

dwalsh27,
Depending on what you mean - any one of the following might be what you want: 
my $var;       # undefined
$var = undef;  # explicitly set to undefined
undef $var;    # explicitly set to undefined
$var = '';     # defined, but empty - will test false
$var = 0;      # defined with a value - which will test false
$var = \0;     # defined with a value of null

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Cheers - L~R

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Re: Re: NULL Variables
by dwalsh27 (Initiate) on Feb 04, 2004 at 19:34 UTC
    Thanks undef works. Isn't that the same as null??
[reply]
      dwalsh27,
      No, undefined is not the same as being set to \0. That's why I said it depends on what you are trying to do with it. Unlike C, Perl strings are not null terminated. Maybe you are interested in knowing what is truth.

      Cheers - L~R

[reply]

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