Null object: Difference between revisions

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m (→‎{{header|C}}: clarify "pointer zero")
(→‎{{header|Pascal}}: should redirect to an anchor in the same page, not to some other page.)
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=={{header|Pascal}}==
See [[Undefined_values/Check_if_a_variable_is_defined#Delphi | Delphi]]
 
=={{header|Perl}}==
Retrieved from "https://rosettacode.org/wiki/Null_object"