Fetch object id with Javascript

Question

I have the following array of objects:

[
  {
    "id": 97,
    "name": "Jon",
    "technologies": [
      {
        "id": 6,
        "name": "React"
      },
      {
        "id": 7,
        "name": "Messageria"
      }
    ]
  },
  {
    "id": 98,
    "name": "Doe",
    "technologies": [
      {
        "id": 2,
        "name": "Javascript"
      },
      {
        "id": 6,
        "name": "React"
      }
    ]
  },
  {
    "id": 99,
    "name": "Mark",
    "technologies": [
      {
        "id": 8,
        "name": "PHP"
      },
      {
        "id": 9,
        "name": "Laravel"
      }
    ]
  }
]

How could I filter this array and return only developers who have, for example, technology with id 6?
The return I need is only developers who have a relationship with technology id 6, however I need other related technologies to also appear to the developer.

I know that through the find method it is possible to do this, but I don't know how to implement it.

const result = developers.find(dev => dev.technologies ?);

What would be the correct form?

filter() and some()

epascarello
– epascarello

2020-09-11 16:51:03 +00:00
Commented Sep 11, 2020 at 16:51 — epascarello
– epascarello, Commented Sep 11, 2020 at 16:51

Shababb Karim · Accepted Answer · 2020-09-11 16:56:41Z

2

You can use filter with some array operations for this task. Something like this:

persons.filter(person => person.technologies.some(tech => tech.id == 6))

answered Sep 11, 2020 at 16:56

Shababb Karim

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Comments

Ravi · Accepted Answer · 2020-09-11 16:53:30Z

1

This will return details of person with technology id 6:

persons = [
  {
    "id": 97,
    "name": "Jon",
    "technologies": [
      {
        "id": 6,
        "name": "React"
      },
      {
        "id": 7,
        "name": "Messageria"
      }
    ]
  },
  {
    "id": 98,
    "name": "Doe",
    "technologies": [
      {
        "id": 2,
        "name": "Javascript"
      },
      {
        "id": 6,
        "name": "React"
      }
    ]
  },
  {
    "id": 99,
    "name": "Mark",
    "technologies": [
      {
        "id": 8,
        "name": "PHP"
      },
      {
        "id": 9,
        "name": "Laravel"
      }
    ]
  }
]

persons.filter(person => person.technologies.find(tech => tech.id == 6))

answered Sep 11, 2020 at 16:53

Ravi

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Comments

Shubham Verma · Accepted Answer · 2020-09-11 16:59:25Z

You need to use some for finding whether element exist with specific id or not:

const data = [
  {
    "id": 97,
    "name": "Jon",
    "technologies": [
      {
        "id": 6,
        "name": "React"
      },
      {
        "id": 7,
        "name": "Messageria"
      }
    ]
  },
  {
    "id": 98,
    "name": "Doe",
    "technologies": [
      {
        "id": 2,
        "name": "Javascript"
      },
      {
        "id": 6,
        "name": "React"
      }
    ]
  },
  {
    "id": 99,
    "name": "Mark",
    "technologies": [
      {
        "id": 8,
        "name": "PHP"
      },
      {
        "id": 9,
        "name": "Laravel"
      }
    ]
  }
]

const myFilteredData = data.filter(test => test.technologies.some(data => data.id===6));

console.log(
myFilteredData
)

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