On 10/06/10 15:38, Charlie Reinl wrote: > Am Donnerstag, den 10.06.2010, 14:37 +0800 schrieb Werner: > >> I'm trying to implement a simple class that creates a Float[3] array. I >> would like to give the user of the class an optional opportunity to fill >> the array with data when the class is instantiated. >> >> ---------------------------------------- >> ' Gambas class file >> ' Vector3f Class >> >> Public v As New Float[3] >> >> Public Sub _new(Optional x As Float, y As Float, z As Float) >> If Param.Count > 0 Then v[0] = x >> If Param.Count > 1 Then v[1] = y >> If Param.Count > 2 Then v[2] = z >> End >> --------------------------------------- >> >> The above does not work because Param.Count is always 0 no matter if >> parameter values are supplied or not. My guess is that's because >> Optional can only be used from the second parameter onwards (why?). >> >> How can I make this class do what it should? >> >> Thanks >> Werner Dahn >> > Salut Werner, > > where Param is filled? , what is Param ? an array? the class ? > > for Optional, I do not know if it can be chained like you do. > But it can be used also on the first Parameter. > Param is a Gambas Class. It can be used to find out how many parameters are supplied to a routine. It's just the way my example is written it always gives a Count of zero, no matter how many parameters are actually supplied. http://gambasdoc.org/help/comp/gb/param
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