split out object property and values from an array [duplicate]

Question

From this json arrays

{
    "result": [
        {
            "id": "1",
            "name": "John",
            "type": "B",
            "score":"passed"
        },
        {
            "id": "2",
            "name": "Alice",
            "type": "A",
            "score":"failed"
        }

    ]
}

How to split out some field and turn it intosomething like this

{
    "result": [
        {
            "id": "1",
            "type": "B",
        },
        {
            "id": "2",
            "type": "A",
        }

    ]
}

I do not want to use splice in my case, above is just sample code.

@Pointy updated my question, i do not want to delete, above code is just sample code. — James Lemon
– James Lemon, Commented Apr 11, 2015 at 14:12
What do you mean, "just sample code"? If you can't pose a clear question how do you expect to get help? The only difference between the (inexplicably edited) lists above is that the objects in the second one are missing two attributes present in the first one. — Pointy
– Pointy, Commented Apr 11, 2015 at 14:13
@Pointy just don't use delete because I need only few field, delete is bad in my case. — James Lemon
– James Lemon, Commented Apr 11, 2015 at 14:13

jcubic · Accepted Answer · 2015-04-11 14:15:31Z

4

Try this:

var input = {
    "result": [
        {
            "id": "1",
            "name": "John",
            "type": "B",
            "score":"passed"
        },
        {
            "id": "2",
            "name": "Alice",
            "type": "A",
            "score":"failed"
        }

    ]
};
var output = {
    result: input.result.map(function(item) {
       return {
          id: item.id,
          type: item.type
       };
    })
}

answered Apr 11, 2015 at 14:15

jcubic

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9 Comments

James Lemon Over a year ago

you don't need "" for result?

jcubic Over a year ago

@JamesLemon no, you don't need quotes for keys.

James Lemon Over a year ago

what if I just want array? discard the result key?

jcubic Over a year ago

@JamesLemon then just use var output = input.result.map(function(item) { ... });

jcubic Over a year ago

@JamesLemon if you don't use key then you can't use object it will work, check my comment.

|

Anik Islam Abhi · Accepted Answer · 2015-04-11 14:15:14Z

3

Try like this

   var json = {
   "result": [{
           "id": "1",
           "name": "John",
           "type": "B",
           "score": "passed"
       }, {
           "id": "2",
           "name": "Alice",
           "type": "A",
           "score": "failed"
       }

   ]
   };

   json.result.forEach(function(item) {
   delete item.name;
   delete item.score;
   });

   console.log(json);

answered Apr 11, 2015 at 14:15

Anik Islam Abhi

25.4k8 gold badges61 silver badges82 bronze badges

Comments

Omar Elawady · Accepted Answer · 2015-04-11 14:15:24Z

3

iterate over arry and remove age property

var json = [
    {"name":"john",
     "age":"30",
     "gender":"male"},
    {"name":"Alice",
     "age":"20",
     "gender":"female"}

];
json.forEach(function(x){
delete x['age'];
})

answered Apr 11, 2015 at 14:15

Omar Elawady

3,3601 gold badge15 silver badges17 bronze badges

1 Comment

James Lemon Over a year ago

simple yet working solution, just nice.

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