Detect if an optional argument (which may include None) is provided
90461
python - returning a default value
158033
Check existence of input argument in a Bash shell script
135685
Arguments to If[] are not evaluated
56122
Is there any way to define pure functions with optional arguments?
149157
Use of optional argument stretch in \parbox
92922
Skipping an optional argument in Sass mixin
106983
Python `if x is not None` or `if not x is None`?
109300
Handle either a list or single integer as an argument
77366
Commands that may take a variable number of arguments
108059
write some AMPscript to skip a record if its empty
103811
Can I determine if an argument is string literal?
50076
How to test that no exception is thrown?
118548
How can I use one argument as the default value for another?
107396
Bare asterisk in function arguments?
104809
How can I read a function's signature including default argument values?
78421
\includegraphics optional argument not resolved if macro
139143
How to specify optional arguments that take functional values