Null object: Difference between revisions
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(→{{header|Lasso}}: adding null type comparison tests) |
(→{{header|Delphi}}: Adds Déjà Vu example) |
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if not Assigned(lObject) then |
if not Assigned(lObject) then |
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...</lang> |
...</lang> |
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=={{header|Déjà Vu}}== |
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There isn't an actual null object, so generally falsy objects are used to indicate a missing value, or when that's impractical a specific ident: |
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<lang dejavu>if not obj: |
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pass #obj is seen as null |
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if = :nil obj: |
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pass #obj is seen as null</lang> |
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=={{header|DWScript}}== |
=={{header|DWScript}}== |
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