Null object: Difference between revisions

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m (Fix Perl 6 -> Raku in comments)
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=={{header|langur}}==
=={{header|langur}}==
Null can be compared for directly, using equality operators, or can be checked with the isNull() function. Database operators (ending with ? mark) propagate null. A null in an expression test is a non-truthy result.
Null can be compared for directly, using equality operators, or can be checked with the isNull() function. Operators ending with a ? mark propagate null. A null in an expression test is a non-truthy result.


<lang langur>val (.x, .y) = (true, null)
<lang langur>val (.x, .y) = (true, null)