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Remove nesting level #20744

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StefanKern opened this issue Dec 15, 2022 · 1 comment · May be fixed by #20745
Open

Remove nesting level #20744

StefanKern opened this issue Dec 15, 2022 · 1 comment · May be fixed by #20745
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new-challenge Propose a new challenge, a PR will be auto generated

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@StefanKern
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StefanKern commented Dec 15, 2022 •
edited

Please follow the template and fill the info. A PR will be auto-generated and always reflect on your changes.

Detailed solution/guide is not required, but please be sure the challenge is solvable.

Info

difficulty: easy #  hard 
title: Overwrtie type with type of child
# tags: union, array # separate by comma

Question

Assuming you have and object of type

{
   "id": number,
   "foo": {
        "id": number,
        "data": {
            "id": number,
            "prop1": any,
            "prop2": any
        }
   }
}

and we want to remove the nesting of the data to get a type

{
   "id": number,
   "foo": {
        "id": number,
        "prop1": any,
        "prop2": any
   }
}

Should also work with deeper levels of nesting e.g.

interface DeepModel {
  'id': number,
  'foo': {
    'id': number,
    'data': {
      'id': number,
      'prop1': any,
      'prop2': any,
      'bar': {
        'id': number,
        'data': {
          'id': number,
          'prop1': any,
          'prop2': any,
        }
      }
    }
  }
}

should be reduced to

interface ReducedDeepModel {
  'id': number,
  'foo': {
    'id': number,
    'prop1': any,
    'prop2': any,
    'bar': {
      'id': number,
      'prop1': any,
      'prop2': any,
    }
  }
}

Template

type ReducedNesting<T> = any

Test Cases

import type { Equal, Expect } from '@type-challenges/utils'

interface Model {
   "id": number,
   "extension": {
        "id": number,
        "data": {
            "id": number,
            "prop1": any,
            "prop2": any
        }
   }
}

type ReducedModel = {
   "id": number,
   "extension": {
        "id": number,
        "prop1": any,
        "prop2": any
   }
}

interface DeepModel {
  'id': number,
  'foo': {
    'id': number,
    'data': {
      'id': number,
      'prop1': any,
      'prop2': any,
      'bar': {
        'id': number,
        'data': {
          'id': number,
          'prop1': any,
          'prop2': any,
        }
      }
    }
  }
}

interface ReducedDeepModel {
  'id': number,
  'foo': {
    'id': number,
    'prop1': any,
    'prop2': any,
    'bar': {
      'id': number,
      'prop1': any,
      'prop2': any,
    }
  }
}

type cases = [
  Expect<Equal<ObjectFromEntries<ReducedModel>, Model>>,
  Expect<Equal<ObjectFromEntries<DeepModel>, ReducedDeepModel>>,
]

typescript playground

PS: sorry I did not figure out how I can make the template as beautiful as the others, but I hope this is an interesting challenge
@StefanKern StefanKern added the new-challenge Propose a new challenge, a PR will be auto generated label Dec 15, 2022
@github-actions github-actions bot linked a pull request Dec 15, 2022 that will close this issue
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github-actions bot commented Dec 15, 2022 •
edited

#20745 - Pull Request updated.

2022-12-15T15:20:47.905Z Preview in Playground

github-actions bot pushed a commit that referenced this issue Dec 15, 2022
@StefanKern
feat(question): add #20744 - Overwrtie type with type of child
ca41d1e
github-actions bot pushed a commit that referenced this issue Dec 15, 2022
@StefanKern
feat(question): add #20744 - Overwrtie type with type of child
5c5bc12
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#20744 - Overwrtie type with type of child type-challenges/type-challenges
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@StefanKern