Lodash get single array from nested array objects

Question

sorry for the newbie question. Using lodash, how to get an array with all nested "machineries" entries from this API response ?

{
  "areas": [
    {
      "name": "BAR 1",
      "machineries": [
        {
          "_id": "stand BAR 1.1"
        }
      ]
    },
    {
      "name": "BAR 2",
      "machineries": [
        {
          "_id": "stand BAR 2.1"
        },
        {
          "_id": "stand BAR 2.2"
        }
      ]
    }
  ]
}

Using above data I would return 3 entries:

[
    {
        "_id": "stand BAR 1.1"
    },
    {
        "_id": "stand BAR 2.1"
    },
    {
        "_id": "stand BAR 2.2"
    }
]

Thank's

Yosvel Quintero · Accepted Answer · 2022-05-23 14:06:34Z

0

You can use Array.prototype.flatMap() combined with Array.prototype.map() and Destructuring assignment:

const data = {areas: [{name: 'BAR 1',machineries: [{_id: 'stand BAR 1.1',},],},{name: 'BAR 2',machineries: [{_id: 'stand BAR 2.1',},{_id: 'stand BAR 2.2',},],},],}

const result = data.areas.flatMap(({ machineries: m }) => m.map(({ _id }) => ({ _id })))

console.log(result)

edited May 23, 2022 at 14:06

answered May 6, 2022 at 13:21

Yosvel Quintero

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1 Comment

Yosvel Quintero Over a year ago

@ClaudioBarca good to help!

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