For loops conditional/filtering (for in if)

[Apollo-Roboto]

Link to SlintPad

I want to suggest a syntax to filter arrays with the for loops. Maybe something similar to Python like this:

for x in items if x.enabled:
Text {
    text: "Hi! " + x.msg;
}

What works currently is to wrap your element in a Rectangle and call the condition inside it. Which is not as pretty to me.

for x in items:
Rectangle {
    if x.enabled:
    Text {
        text: "Hi! " + x.msg;
    }
}

[ogoffart]

Indeed, right now there must be an intermediate Rectangle as a workaround.

I think allowing this syntax would make sense: for x in items if x.enabled:

Another proposal from #1328
for x in items.filter(x => x.enabled):

But the first option might have less challenge than arbitrary filter function.

[Apollo-Roboto]

Nice, I like filter() too, that feels much more consistent with Rust's iterator functions.

I imagine this for in if could still be interesting as some syntax shortcut. Would you consider both approach in the language?

[tronical]

That’s a very pythonic syntax suggestion - I like it :)