I know I’ve probably used this term a bunch in other blog posts but I don’t think I’ve ever explained what a method signature is.
In Xojo a “method signature” is the unique way Xojo identifies each method so it can know which method you are calling in your code.
So what does that include ?… Read the rest
I’ll admit that I really haven’t seriously touched R3 since most of its focus was on iOS and dark mode which isn’t something that matters to me.
The times I did start it I found it to still be slow like R2.1 and otherwise not many significant differences in the things I was trying.
Autocomplete is still glaringly bright in dark mode on macOS.… Read the rest
No not your plate (despite it being right around American Thanksgiving)
Sometimes when you write your code its convenient to have several versions of “the same” method.
For instance, in Xojo you might look at the AddRow method on the Listbox class )in 2019r1.1) and see that it has several forms
ListBox.AddRow(ParamArray Item as String)
ListBox.AddRow(items()Operator_Convert is a very handy method to implement on a lot of classes. It not only lets you create a mechanism to make your classes convert themselves into other types but it also lets you create new instances FROM other data types.
So let’s start with the simple forms of operator_convert – the “convert TO” forms.… Read the rest
A recent comment on my post about overriding prompted me to write this second post about interfaces and why you might use them. Its clear to me that I havent done a very good job of explaining why you should or would use them.
In some languages you can create classes that inherit from one other and one other only.… Read the rest
I’m feeling a little under the weather and just dont feel up to writing more posts
Hopefully this will pass soon enough
FWIW IF there is a topic you’d like me to cover drop me a comment or email
Sometimes when you create a subclass you want to your subclass to do something different than the class it inherits from. But you want to retain the API or reuse the method name because its perfectly suited.
When you do this and add a method that has the EXACT SAME signature as the one in the superclass you are overriding the method.… Read the rest
If you have CSV data that is in and encoding other than ASCII you CAN still use the CSV parser but the results you will need to use “define encoding” on
See this post https://forum.xojo.com/57109-csv-parser-with-utf8-support
Xojo doesnt support named parameters. And I dont expect they are likely to add it any time soon. But, you can kind of fake it for yourself with a bit of work.
Xojo supports both variadic parameter lists, ones that take an unbounded list of parameter, and a declarative syntax for creating pairs as literals.
You can combine this into faking named parameters.… Read the rest
Flat out I’ll say Thanks to Xojo for the 2.1 decision to revert the event name changes. Of all the changes that one was probably the hardest one to deal with as there’s no easy way to #if around an event definition or event handler.
Properties may still cause some grief if you start a project in 2019r2 or r2.1 since they don’t retain the “old” values” so going back to an old version can be tricky if you start in 2019r2 or 2.1.… Read the rest