Get array from a array by key javascript

Question

Hello ~ I have an array object

[ 
  { "name":"mark", "age" : 18 },
  { "name" : "lin" ,"age": 20 }
]

I want to transform the over array object to it below .

[
 { "name": "mark"},
 { "name" : "lin" }
]

Do everyone have any brief method to transform it. thanks ~

You can iterate the array and call delete objectReference.age for each element — guest271314
– guest271314, Commented Jul 30, 2017 at 3:21

Durga · Accepted Answer · 2017-07-30 05:36:58Z

2

Use delete

var a=[ 
       { "name":"mark", "age" : 18 },
       { "name" : "lin" ,"age": 20 }
      ];
    
for(each in a){
   delete a[each].age
}

console.log(a);

edited Jul 30, 2017 at 5:36

Durga

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answered Jul 30, 2017 at 3:21

Parth Ghiya

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Comments

yuchuan · Accepted Answer · 2017-07-30 03:24:32Z

0

You can do it with array.map

var array = [ 
  { "name":"mark", "age" : 18 },
  { "name" : "lin" ,"age": 20 }
];

var transformedArray = array.map(function(obj){
    return { name: obj.name };
});

Note that map returns a new array instead of mutating the original array, which is helpful if you don't want to lose the age information.

answered Jul 30, 2017 at 3:24

yuchuan

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Comments

samAlvin · Accepted Answer · 2017-07-30 03:23:54Z

0

You can use Javascript map function like this snippet below:

var arr = [ 
  { "name": "mark", "age": 18 },
  { "name": "lin", "age": 20 }
];

console.log(arr);

var mappedArr = arr.map(element => {
  return {"name": element.name};
});

console.log(mappedArr);

answered Jul 30, 2017 at 3:23

samAlvin

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Comments

Gerardo · Accepted Answer · 2017-07-30 03:25:28Z

0

var array = [ 
  { "name":"mark", "age" : 18 },
  { "name" : "lin" ,"age": 20 }
]

arrayA = array.map((object) => {
  return { name: object.name };
});

// or

arrayB = array.map((object) => {
  delete object.age;
  return object;
});

JSBin

answered Jul 30, 2017 at 3:25

Gerardo

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