Kotlin button array

Question

I really hope this question has not been answered everywhere else already but every search seems to focus on listeners and other uses of a button array but i want to also use it for formatting all buttons at the same time (activate, deactivate etc)

So here is what I have tried;

val buttons = arrayOf(btn1,btn2,btn3,btn4)

This will work, BUT will only change a single button

buttons[0].isEnabled=true; //

Then this is the bit that I am struggling with;

buttons[0..buttons.size].isEnabled=true;

The response is basically that it expects a single number and not a range.

I also tried;

buttons[].isEnabled=true;

The response is that it requires an index

I also tried

buttons.isEnabled=true;

This of course will not resolve properly

My key question really is can I apply formatting/state changes to all using an array or will I always have to do it for each button in turn?

I think it would be possible to create a loop but that isn't the route I wanted to follow here if there is an alternative

David Kroukamp · Accepted Answer · 2020-11-21 14:30:37Z

2

Don't think there is a way mate. You gotta loop and regardless of what syntatic sugar a language has in the end its still a for loop.

You could do:

buttons.forEach {
    it.isEnabled = true
}

edited Nov 21, 2020 at 14:30

answered Nov 21, 2020 at 14:18

David Kroukamp

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4 Comments

UnknownError Over a year ago

Is the "it" meant to be replaced with anything? Like a counter? If I use the code as per your suggestion "enabled" reference does not resolve any longer

David Kroukamp Over a year ago

@Karl Griffiths please see my updated answer, sorry used the wrong property, should be isEnabled and not enabled

UnknownError Over a year ago

doh! I should have noticed that as well. Thank you. Also you are right this is a loop like any other and ultimately what I was describing as needed, I had a much more long winded view of the loop in my head than would have been worth it which is what I wanted to avoid. I had no idea I could write it so simply. Thank you for your assistance

David Kroukamp Over a year ago

@Karl Griffiths no problem mate, and Kotlin is a very "sexy" language syntactically in my opinion when compared to Java and even C#. But yeah as you learn the language more it will grow on you even further 😄

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