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nlepage avatar nlepage commented on May 23, 2024 1

In fact, immutad●t is the shortest...

from immutadot.

nlepage avatar nlepage commented on May 23, 2024

IMO the current behavior is correct.

But it would be nice to have some mechanism to achieve a "lazy" get inside a slice.

ES version:

{
  ...obj,
  arr: obj.arr.map(({ nested1, nested2, ...rest }) => ({
    ...rest,
  	nested1: {
      ...nested1,
      val: nested2.val,
    },
    nested2,
  }))
}

Very easy with immer:

produce(
  obj,
  draft => draft.arr.forEach(({ nested1, nested2 }) => { nested1.val = nested2.val }),
)

and of course with qim ❤️ (not sure if this is the simplest way):

apply(
	['arr', $each, $setContext('val2', select(['nested2', 'val'])), 'nested1', 'val'],
  (_, { val2 }) => val2[0],
  obj,
)

In fact there is one way to do it with immutad●t:

update(
  obj,
  'arr[:]',
  set('nested1.val', get('nested2.val')),
)

Maybe this is sufficient... I think I need some sleep...

from immutadot.

nlepage avatar nlepage commented on May 23, 2024

Closing this

from immutadot.

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