re: What's a useful programming language feature or concept that a lot of languages don't have? VIEW POST

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I think this is more of an underutilized features rather than an uncommon one, but I really like Extension Methods. They allow you to "attach" a method to a class that you otherwise can't or don't want to modify.

For example, rather than:

Foo(FrameworkClass)

You can write:

 FrameworkClass.Foo

In Xojo you'd do this with the Extends keyword in the global method definition:

Public Sub Foo(Extends FrameworkClass As c)
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