Implementing multiple sortable containers from scratch (no ngRx) about angular-skyhook HOT 3 CLOSED

You can still use immutable data structures without ngrx. It makes programming this easier. Use the “immer” library, it’s only like 2kB. The morphing quiz example does this, I believe.

As for hover, the way it’s implemented in the examples with immutable lists is that you have to produce a new version of the list-of-lists. To preserve cancel-ability, you keep the old one around, and it simplifies things to implement hover with the same code that moves things for real, because the requirements of hover are pretty much identical to moving:

• a normal move, usually done in drop that takes the old list-of-lists and moves the card, producing a new list-of-lists
• a hover, which takes the old list-of-lists and moves the card to exactly the same place (“under the mouse”), producing a new list-of-lists

You don’t have to do that, you could always just “move it back” to cancel, but cancelling is way easier when you do it this way.

I’m not going to code up what it looks like when you just mutate lists in flight, because it’s painful and frankly a waste of time. If any clojure developers looked at Dragula/ng2-dragula and this list-mutating madness, they would have to put their spaceships on autopilot for a moment to fall over laughing. Yes it could be done, but save yourself the trouble.

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Thanks for getting back to me so quickly. I'll give Immer a shot today, and hopefully save myself a headache and learn something as well.

Also, I notice Immer's readme has a button for buying the developer a coffee to say thanks. I don't know how you feel about asking for donations, but some of us do like to thank the good people like you who make our lives easier with these public projects.

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@killface looks like I thought about it 8 months ago but never added a button. It's a good idea.

Hope you figured out your thing.

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