I have an array of Object as follows:

var obj = [

  {a: 1, b: 5, c: 9},

  {a: 2, b: 6, c: 10},

  {a: 3, b: 7, c: 11},

  {a: 4, b: 8, c: 12}

];

I know about how to get single object using Array.map() like this.

var result = obj.map(x=>x.a)

This will give me following result

[1, 2, 3, 4]

But I want result like follows:

[

  {a: 1, b: 5},

  {a: 2, b: 6},

  {a: 3, b: 7},

  {a: 4, b: 8}

]

In short, from an array of objects I want to select only a few fields (more than one).

How can I do that?