Hi
I'm discovering b4a languages features in order to get a large know how. I have two questions:
a) is it possibile to pass an whole array to a sub?
thats to say
dim a(9) as int
.
sub grind_array (x....) <<<<??? how to specify formal parameter???
x(5)=4
end sub
I have tryed to code the following code but I get an error "Use of undeclared array: x"
b) I read the Erel's post about Variables & Objects in Basic4android. I'm studying about the phrase "When you pass a non-primitive to a sub or when you assign it to a different variable, a copy of the reference is passed." and about "All types can be treated as Objects". So I tryed another example passing the single array cell but it seems that it's behaving as value passing. let's see.
I thought that the correct value for the actual param after the s2 call would be 666 and not 25.
So, could you help me understanding this topic.
cheers
alex
I'm discovering b4a languages features in order to get a large know how. I have two questions:
a) is it possibile to pass an whole array to a sub?
thats to say
dim a(9) as int
.
sub grind_array (x....) <<<<??? how to specify formal parameter???
x(5)=4
end sub
I have tryed to code the following code but I get an error "Use of undeclared array: x"
B4X:
Sub Globals
Dim b(10), i As Int
For i=0 To 9 : b(i)=i*i : Next
Log("actual param before: "& b(5)) 'Prints b(5) before sub call
S2(b)
Log("actual param after: " & b(5)) 'Prints b(5) after sub call
End Sub
Sub S2(x As Object)
Log("formal param before: "& x) 'Prints x
x(5)=666
Log("formal param after: " &x) 'Prints x
End Subb) I read the Erel's post about Variables & Objects in Basic4android. I'm studying about the phrase "When you pass a non-primitive to a sub or when you assign it to a different variable, a copy of the reference is passed." and about "All types can be treated as Objects". So I tryed another example passing the single array cell but it seems that it's behaving as value passing. let's see.
B4X:
Sub Globals
Dim b(10), i As Int
For i=0 To 9 : b(i)=i*i : Next
Log("actual param before: "& b(5)) 'Prints b(5) before sub call
S2(b(5))
Log("actual param after: " & b(5)) 'Prints b(5) after sub call
End Sub
Sub S2(x As Int)
Log("formal param before: "& x) 'Prints x
x=666
Log("formal param after: " & x) 'Prints x
End SubI thought that the correct value for the actual param after the s2 call would be 666 and not 25.
So, could you help me understanding this topic.
cheers
alex