Parameter completition
[
Date Prev][
Date Next][
Thread Prev][
Thread Next]
[
Date Index]
[
Thread Index]
- Subject: Parameter completition
- From: Markus Huber <pulse@...>
- Date: 2002年1月11日 01:12:35 +0100 (GMT)
The following example shows, why I need boolean:
false = 0
true = 1
function Complete(Parameter,Value)
if Parameter==nil then
Parameter=Value
end
return Parameter
end
function Test(Parameter1,Parameter2)
Parameter2=Complete(Parameter2,true)
print(Parameter1)
print(Parameter2)
end
Test(3) -- prints 3 1
Test(3,nil) -- prints 3 1
Test(3,false) -- prints 3 0
Test(3,true) -- prints 3 1
In this example if Parameter2 not given then it should be used the
default. Is it possible to give the parameter as a reference instead of
a copy? Then I could write much shorter: Complete(Parameter2,true)
instead of typing the variable name twice.
Its impossible to use "nil" or "not nil" for Parameter2 as a flag.
Because "nil" is interpreted as a non given parameter.
Thanks for any comments.
--
Markus