js delete one key from obejct code example
Example 1: remove key from object array javascript
array.forEach(function(v){ delete v.bad });
Example 2: javascript delete key from object
let person = {
firstname: 'John',
lastname: 'Doe'
}
console.log(person.firstname);
// expected output: "John"
delete person.firstname;
console.log(person.firstname);
// expected output: undefined