+= and ++?

Getting Started
1

Hello

Does += and/or ++ exist in Xojo?
Cannot seem to find it in the documentation.

It’s way cleaner to write

string1 += string2

instead of

string1 = string1 + string2

Thanks!

2

No, they don’t exist in Xojo.

Julen

3

Thanks for the fast reply Julen!

4

You could use Extends to get the += functionality:

Add this method to a module:

Sub Append(Extends ByRef s1 As String, s2 As String) s1=s1+s2 End Sub

Then you can use it this way:

string1.Append String2

“Append” is just the name of the method, it can be shortened of course.

Julen

5

But don’t do that where speed is critical as function calls come with an overhead, at least in 32 bit.

I use Keyboard Maestro on the Mac to retype my code when those keystrokes are used. If I type “i opt-plus opt-plus”, it replaces it with i = i + 1.

6

[quote=313350:@Mathias Maes]It’s way cleaner to write

string1 += string2

instead of

string1 = string1 + string2

Nope.

7

[quote=313354:@Julen Ibarretxe Uriguen]You could use Extends to get the += functionality:

Add this method to a module:

Sub Append(Extends ByRef s1 As String, s2 As String) s1=s1+s2 End Sub

Then you can use it this way:

string1.Append String2

“Append” is just the name of the method, it can be shortened of course.

Julen[/quote]

Yeah I know, but that seems confusing, as most developers would expect the ‘Append’ method on Arrays or other list types. Or maybe on more complex types like stringbuilder in C#. Not usualy on basic data types.

8

[quote=313355:@Kem Tekinay]But don’t do that where speed is critical as function calls come with an overhead, at least in 32 bit.

I use Keyboard Maestro on the Mac to retype my code when those keystrokes are used. If I type “i opt-plus opt-plus”, it replaces it with i = i + 1.[/quote]

That’s a great idea! Thanks!

9

IF you were to make a function… (which for reasons stated above I don’t suggest you do)… but
I’d name it CONCAT instead of APPEND

10

[quote=313379:@Dave S]IF you were to make a function… (which for reasons stated above I don’t suggest you do)… but
I’d name it CONCAT instead of APPEND[/quote]

That is indeed a better name. But I won’t make a function ideed.