how to exclude some properties of object

Question

I'm new in JavaScript I have this object that want to exclude 2 keys :

"age":20 and "university":"HCC".

As a result, I want to see "name:"Sam" and "class":55 as the only properties in the object.

var b = { 
    "name":"Sam",
    "age":20,
    "university":"HCC",
    "class":55
}

Jack Bashford · Accepted Answer · 2019-06-10T00:18:43.840

1

To exclude properties from an object, you could use a simple delete:

var b = { 
    "name":"Sam",
    "age":20,
    "university":"HCC",
    "class":55
};

delete b.age;
delete b.university;

console.log(b);

If you want to check the value is the same as well, you could use reduce with Object.entries:

var b = { 
    "name":"Sam",
    "age":20,
    "university":"HCC",
    "class":55
};

const res = Object.entries(b).reduce((a, [k, v]) => {
  if (!((k == "age" && v == 20) || (k == "university" && v == "HCC"))) {
    a[k] = v;
  }
  return a;
}, {});
  
console.log(res);

edited Jun 10 '19 at 00:18

answered Jun 10 '19 at 00:16

Jack Bashford

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Please vote to close such clear duplicate questions. – CertainPerformance Jun 10 '19 at 00:18
My bad, I have never seen that question before. Thanks for telling me. – Jack Bashford Jun 10 '19 at 00:19
thank you for helping me i was trying this in my code for some reason if item contain & or space it doesn't work. for example it doesn't delete this item: art & science – Eli Jun 10 '19 at 00:34
No problem @Eli, always glad to help. If my answer fixed your problem, please mark it as accepted. – Jack Bashford Jun 10 '19 at 00:56
You can also use the spread operator: const {age, university, ...newB} = b; – Dov Rine Jun 10 '19 at 00:56
Yes @DovRine, that would also work. – Jack Bashford Jun 10 '19 at 00:58

how to exclude some properties of object

1 Answers1