Null object: Difference between revisions
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LalaithMeren (talk | contribs) |
Langurmonkey (talk | contribs) |
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Null can be compared for directly, using equality operators. Operators ending with a ? mark propagate null. A null in an expression test is a non-truthy result. |
Null can be compared for directly, using equality operators. Operators ending with a ? mark propagate null. A null in an expression test is a non-truthy result. |
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<syntaxhighlight lang="langur"> |
<syntaxhighlight lang="langur"> |
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var x, y = true, null |
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writeln |
writeln x == null |
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writeln |
writeln y == null |
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writeln |
writeln x ==? null |
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writeln |
writeln y ==? null |
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# null not a "truthy" result |
# null not a "truthy" result |
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writeln if(null: 0; 1) |
writeln if(null: 0; 1) |
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</syntaxhighlight> |
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{{out}} |
{{out}} |
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