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In Delphi procedures you can have default values for parameters. That means these parameters are optional. If the sub is called without these parameters, the default values will be used instead. Why would you need this? It allows for the creation of more flexible & intelligent Subs. Default paramet
link: Erel, Is it difficult to implement optional parameters for Subs? From the thread that was started 4 years ago a lot of people thought it was a good
link: You're right. I missed it. But the thread was last updated 3+ years ago and Erel said 4 1/2 years ago "This feature may be added in a future version.

Now there, I don't think anyone here tried promoting "hiding parameters". That seems a bit unfair to label it as such. It seems to me that your argument could be rephrased to "I don't like default parameters because they won't show up in the sub signature". To me, that indicates that you perhaps ha
link: I don't want to add more fuel to this already overly heated thread, I just want to add a better illustration of how the IDE can display optional param
link: .......Now... about the path (like my friend AnandGupta said) we had... I think if it is optional (can't say how will be)... will be good to added a
link: At the risk of drawing friendly-fire: I think @AnandGupta gave an example of a benefit, being when shared code is extended eg: Sub AnswerToLife(Par1

I do agree with the optional parameters with default values hope for the next versions
link: I fully agree that optional parameters and default values would be very useful; but I know that this thing has been asked several times and so I suppo
link: You're right, those documentation lines above a Sub are very nice. Well, it's maybe a habit or something. One way or another, it feels 'wrong' for me
link: it will be great to see default-value and optional-arguments options in next release like Private Sub DoSomething (X as byte, optional Y as boolean =

Since my program is so large, it's getting increasingly difficult to add parameters to functions, cause I don't want to have to go through all the existing code to add default parameter values. I've been using messy/bad coding habits to get around this, by using a single parameter for multiple thin

Has there been any updates regarding Optional Parameters for B4X? It would be a very useful feature!
link: Please, search the site: this question was already asked (many times) https://www.b4x./?query=Optional+Parameters&prefix=5

I'd like to suggest how this could be implemented. I'm pretty sure you have some code that enumerates the parameters for a given function and stores it in a variable type like: type Parameter(Name as string, pType as string, isArray as boolean) which gets put in a list Add 2 members, 1 named Defaul
link: Yes. Optional parameters, helpful. Gimme, gimme.
link: Or at least an option to add a new parameter to every time the function is called ie: the code is currently functionane(par1) we add a new paramet

Looks good. Optionally logging something about each parameter would be cool too.
link: Do you mean something like... https://www.b4x.com/android/forum/threads/log-routine-name-crazy-idea.96932/
link: Is there a way like a #BridgeLoggerDeluxe to make all Events show in the log the way B4XPages stuff does?
link: By pure chance, just today I was thinking about creating a new, updated and different version of my very old AddLogs.

Thanks but, even if I agree, optional parameters are useful (sometimes), I refer to the possibility of using CallSub and CallSubDelayed with an unlimited number of arguments, which is not the same thing. I think that this thread could be considered closed ;)
link: I think you're heading towards optional named variable parameters. Which are great: when you need them, you need them bad. And they do make the code
link: My question was really directed to Erel and asking him if it would be possible to modify the B4X IDE/Compiler to implement optional parameters just li
link: How does the VB6/VB.NET compiler support optional parameters, and can that ability be implemented in B4X?

Not quite. That isn't an optional parameter, it is a parameter with a magic value. Someone reading the code has to think "What is -1? Is it a real value?" when they read that function. In my case I've got quite a few functions with 4-6 mandatory parameters, and maybe two optional parameters. Those
link: I'm porting some code from Python, and the biggest pain point so far is the lack of optional parameters. It is painful for me to have to choose betwe
link: Sub function_name(p1 as Int, p2 as Int, p3 as Int) If p3 <> -1 then param3 = p3 End If ... End Sub function_name(30,25,-1) 'optional para
link: You can hack together some optional parameters functionality using Arrays as the parameters.

Currently you can pass a maximum of two parameters, using CallSub3 (or CallSubDelayed3). The ideal would be that you could pass any number of parameters (also that you could declare them as optional in the routine signature, but this is another question). I know, I can pass a data structure (Array,
link: This is a "wish"; if it is achievable, not to hard to be implemented, well it would be very useful (with optional parameters even better). If not... w
link: ' mmm what number and type variables should I pass to this strange routine? Sub DoSomething(Data() As Object) '... End Sub ' ok I have to pass: ...
link: Use an array or a map. It is very simple.

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