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How to acces the value of a Optional-Positional argument (~ argument) ?

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D D
D D 2022-3-9
编辑： Matt J 2022-3-9
I want a function like this:
function foo(a, b, ~)
foo2(a, b, ~) % two ~ are same
end
However it's not allowed. So how to access the value of ~, or find another way to pass it to foo2?

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Matt J
Matt J 2022-3-9
编辑：Matt J 2022-3-9
The ~ doesn't mean the input is optional. It means the function doesn't care what it is. Since your function does care, use a named argument.
function foo(a, b, c)
foo2(a, b, c)
end

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