kotlinlang #announcements

07/22/2017, 5:11 PM

07/22/2017, 5:11 PM

never mind i think i figured it out

07/22/2017, 5:11 PM

07/22/2017, 5:12 PM

use the let method

07/22/2017, 5:12 PM

07/22/2017, 5:13 PM

if(container.type === Container.Type.EXERCISE)
    providedContainers.find { it.type === Container.Type.EXPLAIN }?.let { containerList.add(it) }

07/23/2017, 8:54 AM

but I can no longer do

myMap["test"] += 123

Say the key under "test" is int.

07/23/2017, 8:54 AM

For obvious reasons

07/23/2017, 8:54 AM

Cast it back

07/23/2017, 8:54 AM

Like I said, it makes it super verbose and kinda annoying for the user

07/23/2017, 8:55 AM

Which any solution with multiple types would be

07/23/2017, 8:55 AM

Im open to alternate suggestions of how to model this

07/23/2017, 8:55 AM

Unless you have something like type classes

07/23/2017, 8:56 AM

But when in combination with is Int is not that verbose, right?

07/23/2017, 8:57 AM

How would I do it with type classes?

07/23/2017, 8:59 AM

07/23/2017, 9:00 AM

Basically model this big key-value store as a map.

07/23/2017, 9:01 AM

so its a two layer map the signature looks something like

Map<String, Map<String, Any>>

(using any as an example) Types are the same inside each map but differ from map to map

07/23/2017, 9:02 AM

Then i think using any is the best way

07/23/2017, 9:03 AM

How will you track what type the value has?

07/23/2017, 9:03 AM

Sorry use genetics

07/23/2017, 9:03 AM

07/23/2017, 9:03 AM

I don't know thats why Im asking in here to get wide consensus

07/23/2017, 9:04 AM

If a map always has only one type of values. Use generics

07/23/2017, 9:04 AM

But then how to store those maps side by side with others 🙂

07/23/2017, 9:05 AM

Again how will you know the type of the embedded maps

07/23/2017, 9:05 AM

Person using the library defines them before runtime

07/23/2017, 9:07 AM

And why do all the maps have to be in a single supermap?

07/23/2017, 9:09 AM

This sounds very similar to Android preferences or ORM type solutions. You could look the for API inspiration

07/23/2017, 9:20 AM