Op 29-4-2012 23:30, Charley Bay schreef:
> In addition to "bindings" and "assignment" (possibly including
> single-values or lists-of-values), is there a QML concept of
> "plus-equals"?
>
> For example:
>
> Item {
> my_set0 : some_val0; // replace value
>
> // ...can I "accumulate" values?
> my_set1 :+ added_val; // Something like this?
> my_set2 +: added_val; // Something like this?
> }
>
>
My gut feeling is, that += is just wrong in terms of declarative
programming. It has a destinctive imparative feel to it. I think you
need to come at it from the other side. Instead of extending a variable
wherever you have a new value to add, we need to search for a syntax
that allows to declare my_set as some set of items that will be declared
later on. Some sort of 'member-of-list' syntax.
I'm really not sure on what would be a good syntax for that though.
André
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