Android Question Initialising byte array

[Hamo]

I am trying to declare and initialize a byte array like this

dim ba(4) as byte = 1,2,3,4

Is there a way of doing this without
ba(0) = 1
ba(1) = 2
ba(2) = 3
ba(3) = 4

Hamo

 

[sorex]

in B4A you need to do it in 2 steps.

this might work

dim ba() as byte
ba=array as byte (1,2,3,4)

 

[Hamo]

This works but I was looking for a more direct way

Dim bc As ByteConverter
Dim s As String
dim PacketToSend(16) as byte

s = "83c20014ffffff00ffffff00ffffff00"
PacketToSend = bc.HexToBytes(s)

Hamo

 

[sorex]

that needs an additional library, mine doesn't.

 

[Hamo]

Thanks, I'll give it a try.
Hamo

 

[Erel]

in B4A you need to do it in 2 steps.

You need one step:

Dim b() As Byte = Array As Byte(1, 2, 3, 4, 0xff, 0xab)

 

[sorex]

thanks for the hint, Erel.

I remember that we discussed this on the chat 2.5 years ago and we couldn't get it to work like that.
So I kept using that 2 step method.

It must've been that 2nd byte definition that we didn't use and used

Dim b() As Byte = (1, 2, 3, 4, 0xff, 0xab)

What's the reason to define the byte (and array) twice?

 

[Erel]

Dim i As Int = 5

We declare a variable of type int and assign the value 5 to this variable.

Dim b() As Byte = Array As Byte(1, 2, 3, 4, 0xff, 0xab)

We declare a variable of type "array of bytes" and assign an array of bytes to it.

 

[sorex]

but in a lot of languages () already means it's an array.
I, and probably others aswell, read that line as "b as array of bytes=array as byte(1,2..)"

so it's declared twice.

b is declared to expect bytes so the "array as byte" is kind of overkill. (unless it opens doors for some wicked stuff)

 

[Erel]

Array As <type>(...) is not a declaration. It is a shorthand syntax to create arrays.

You can use it in any place that expects an array (or list).

For Each i As Int In Array As Int(1, 2,3)
 Log(i)

List1.AddAll(Array As String("a", "b"))

 

[Hamo]

Great stuff Erel many thanks
Hamo