How to return object based on value in nested array? (Javascript)

Question

I am trying to return all objects that have a specific 'id' in the nested array. In the sample data, I'd like to return all person objects with hobbies id of 2 (hiking).

The other question addresses the problem of finding all values in an array based on an object value.

This question differs from the previous because I need to return all objects based on a value inside of a nested array.

[  
   {  
      "id":111222,
      "name":"Faye",
      "age":27,
      "hobbies":[  
         {  
            "id":2,
            "name":"hiking"
         },
         {  
            "id":3,
            "name":"eating"
         }
      ]
   },
   {  
      "id":223456789001,
      "name":"Bobby",
      "age":35,
      "hobbies":[  
         {  
            "id":2,
            "name":"hiking"
         },
         {  
            "id":4,
            "name":"online gaming"
         }
      ]
   }
]

Possible duplicate of How to access specific value from a nested array within an object array? — Akshay Khandelwal
– Akshay Khandelwal, Commented Jul 3, 2016 at 4:58
Haven't you already asked the same question here? stackoverflow.com/questions/38166623/… — Akshay Khandelwal
– Akshay Khandelwal, Commented Jul 3, 2016 at 4:58
Dear Jasmin, SO is not get code for free site. You have to share your efforts as well. — Rajesh Dixit
– Rajesh Dixit, Commented Jul 3, 2016 at 5:03

Mouad Debbar · Accepted Answer · 2016-07-03 08:13:37Z

2

function hasHobby(person, hobbyId) {
  return person.hobbies.some(function(hobby) {
    return hobby.id === hobbyId;
  });
}

function filterByHobby(people, hobbyId) {
  return people.filter(function(person) {
    return hasHobby(person, hobbyId);
  });
}

If you wanna use the new cool ES6 syntax:

function filterByHobby(people, hobbyId) {
  return people.filter(
    person => person.hobbies.some(
      hobby => hobby.id === hobbyId
    )
  );
}

answered Jul 3, 2016 at 8:13

Mouad Debbar

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Comments

Piyush.kapoor · Accepted Answer · 2016-07-03 05:00:16Z

0

var arr = [  
   {  
      "id":111222,
      "name":"Faye",
      "age":27,
      "hobbies":[  
         {  
            "id":2,
            "name":"hiking"
         },
         {  
            "id":3,
            "name":"eating"
         }
      ]
   },
   {  
      "id":223456789001,
      "name":"Bobby",
      "age":35,
      "hobbies":[  
         {  
            "id":2,
            "name":"hiking"
         },
         {  
            "id":4,
            "name":"online gaming"
         }
      ]
   }
];

arr.filter(function(obj) {
 var hobbies = obj.hobbies;
 var x = hobbies.filter(function(hob) {
     if (hob.id == "2") return true;
});

if (x.length > 0) return true;
});

answered Jul 3, 2016 at 5:00

Piyush.kapoor

6,8311 gold badge25 silver badges21 bronze badges

1 Comment

Rajesh Dixit Over a year ago

You can use return hobbies.some instead.

Govind Samrow · Accepted Answer · 2016-07-03 05:51:15Z

0

Try this, I think its solve your proble:

var arr = [{
  "id": 111222,
  "name": "Faye",
  "age": 27,
  "hobbies": [{
    "id": 2,
    "name": "hiking"
  }, {
    "id": 3,
    "name": "eating"
  }]
}, {
  "id": 223456789001,
  "name": "Bobby",
  "age": 35,
  "hobbies": [{
    "id": 2,
    "name": "hiking"
  }, {
    "id": 4,
    "name": "online gaming"
  }]
}];
var x = arr.filter(function(el) {
  var rnel = el.hobbies.filter(function(nel) {
    return nel.id == 2;
  });
  return rnel.length > 0 ? true :false;
});
alert(x.length);

answered Jul 3, 2016 at 5:51

Govind Samrow

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1 Comment

user3560410 Over a year ago

Nice running example

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