Null object: Difference between revisions
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(Added Oz explanation.) |
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print empty? [] ; true |
print empty? [] ; true |
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print empty? "|| ; true</lang> |
print empty? "|| ; true</lang> |
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=={{header|Lua}}== |
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<lang lua> |
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isnil = (object == nil) |
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print(isnil) |
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</lang> |
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=={{header|Mathematica}}== |
=={{header|Mathematica}}== |
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