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Null object: Difference between revisions
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[Erlang] Format code clearly.
m ([Erlang] Fix atom list.) |
m ([Erlang] Format code clearly.) |
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Example alternatives:
# Something like <pre>{ok, 3}</pre> or <pre>{err, no_more}</pre> on error.
# Don't ever allow an undefined return value, and throw an exception instead.
# Return an atom:
## <pre>undefined</pre>*
## <pre>undef</pre>
## <pre>null</pre>
## <pre>nil</pre>
## <pre>none</pre>
Atoms are erlang's user-defined constants that always evaluates to is itself. It is also equal to no other value else but itself.
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