Null object: Difference between revisions
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Thundergnat (talk | contribs) m (Fix Perl 6 -> Raku in comments) |
Langurmonkey (talk | contribs) |
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=={{header|langur}}== |
=={{header|langur}}== |
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Null can be compared for directly, using equality operators, or can be checked with the isNull() function. |
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. |
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<lang langur>val (.x, .y) = (true, null) |
<lang langur>val (.x, .y) = (true, null) |
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