Extract specific properties and their values from an object

Question

Let's say I have this obj:

let userInfo = {
    name: 'Ahmed',
    age: 24,
    _id: "34ef5576",
    email: '[email protected]'
}

how can i extract the properties name, _id, and email. And put them in a new Object? thanks.

So I want a simple way to solve this without any external libraries..!

Answer 1

I find it:

1. let's say we have this Object, The original Object that we want to extract from its specific Fields:

   const parentObj = { name: "ahmed", age: 22, country: "morocco" };
   

2. Now we are creating a function that creates for us the extract object:

   function pickFromObj(originalObject, arrayOfWantedProperties){
     let resultObj = {};
     for(property in originalObject){
       if(arrayOfWantedProperties.includes(property)){
         resultObj[property] = originalObject[property]
       }
     }
     return resultObj;
   }
   

3. Finally Create the extract Object:

   let childObj = pickFromObj(parentObj, ['name', 'age']);