38 replies

✅ – venus – 09-58 Aug 22

Hello, I'm trying to think of best solution to get previous and next item of

selectedState

selectedState

when we fit it inside

initialState

initialState

. Length of

selectedState

selectedState

array could be up to the length of

initialState

initialState

. Is there any function that would do it for me, or do I have to write it by myself?

Example:

const initialState = [
  { id: 'zero' },
  { id: 'one' },
  { id: 'two' }, // Previous item
  { id: 'three' }, // Existing array
  { id: 'four' }, // Existing array
  { id: 'five' }, // Next item
  { id: 'six' },
];

const selectedState = [
  { id: 'three' },
  { id: 'four' },
];

const initialState = [
  { id: 'zero' },
  { id: 'one' },
  { id: 'two' }, // Previous item
  { id: 'three' }, // Existing array
  { id: 'four' }, // Existing array
  { id: 'five' }, // Next item
  { id: 'six' },
];

const selectedState = [
  { id: 'three' },
  { id: 'four' },
];

So in this case it would be:

[{ id: 'two' }, { id: ' five' ]

[{ id: 'two' }, { id: ' five' ]

✅ – venus – 09-58 Aug 22

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