Lodash remove items recursively

Question

Given this JSON object, how does lodash remove the reach value from the objects?

{ 
    total: 350,
    SN1: { 
        reach: 200,
        enga         


        

Answer 1

Recursively omit keys from an object by defining an array of exclude keys in ES6 + Typescript.

omitDeep(myObject, [omitKey1, omitKey2, ...omitKeyN])

// omitDeep.ts

/**
 * Recursively remove keys from an object
 * @usage
 *
 * const input = {
 *   id: 1,
 *   __typename: '123',
 *   createdAt: '1020209',
 *   address: {
 *     id: 1,
 *     __typename: '123',
 *   },
 *   variants: [
 *     20,
 *     {
 *       id: 22,
 *       title: 'hello world',
 *       __typename: '123',
 *       createdAt: '1020209',
 *       variantOption: {
 *         id: 1,
 *         __typename: '123',
 *       },
 *     },
 *     {
 *       id: 32,
 *       __typename: '123',
 *       createdAt: '1020209',
 *     },
 *   ],
 * }
 *
 * const output = {
 *   id: 1,
 *   address: {
 *     id: 1,
 *   },
 *   variants: [
 *     20,
 *     {
 *       id: 22,
 *       title: 'hello world',
 *       variantOption: {
 *         id: 1,
 *       },
 *     },
 *     {
 *       id: 32,
 *     },
 *   ],
 * }
 *
 * expect(omitDeep(input, ['createdAt, 'updatedAt', __typename']).to.deep.equal(output) // true
 *
 * @param {object} input
 * @param {Array>} excludes
 * @return {object}
 */
const omitDeep = (input: object, excludes: Array): object => {
  return Object.entries(input).reduce((nextInput, [key, value]) => {
    const shouldExclude = excludes.includes(key)
    if (shouldExclude) return nextInput

    if (Array.isArray(value)) {
      const arrValue = value
      const nextValue = arrValue.map((arrItem) => {
        if (typeof arrItem === 'object') {
          return omitDeep(arrItem, excludes)
        }
        return arrItem
      })
      nextInput[key] = nextValue
      return nextInput
    } else if (typeof value === 'object') {
      nextInput[key] = omitDeep(value, excludes)
      return nextInput
    }

    nextInput[key] = value

    return nextInput
  }, {})
}

export default omitDeep