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Re: default values of function arguments

• Posted by Lewis Townsend <keroltarr at HOTMAIL.COM> Mar 23, 2000
• 454 views

Hello ©koda,


>1.
>how can I define default value of argument in function/procedure?
>in C it can be done like this,with prototype: func(arg1,arg2=34)
>it would be really really useful, so you wouldn't have to write each time
>all arguments, but just some.
>This would be very useful:
>func(arg1,,arg3)
>just second argument would then use its default value, third can be
>normal(not like in C).
>
>i know that you can do this:
>if arg2=0 then
>     arg2=34
>end if
>or sometin like that,
>but is there a better way, quicker?

Well, there's NOT a way to do it QUICKER.
However, if you are interested in a different way I have
devised one. I don't claim that its QUICKER but it is less
error prone.

myfunc (-- arg#, argvalue
          {1,    10,
           3,    17}
     )

where the function assumes that arg 2 is 34

>2.
>It's dumb that you HAVE to get return value of every function.
>Sometimes you need return value, sometimes not, if you dont have time to
>check for errors.
>Is there a way to use function return values as in C?

That's what procedures are for. If a specific function has
"side effects" that you want to invoke, you can use this setup:

function myfunc ()
  invoke_side_effects..
  return optional_return_value
end fuction

procedure myfuncproc ()
  object junk
  junk = myfunc ()
end procedure

hope this helps,

Lewis Townsend
keroltarr at hotmail.com
http://geocities.com/keroltarr/

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