How do I remove a key from a JavaScript object?

Question

Below is the object I’ve: 

var thisIsObject= {

   'Cow' : 'Moo',

   'Cat' : 'Meow',

   'Dog' : 'Bark'

};

Can anyone tell me how to implement a function that removes by key like below? 

removeFromObjectByKey('Cow');

Answer 1

You can use the ‘delete’ operator, which helps you to remove a property from an object. See the code below: 

// Example 1

var key = "Cow";

delete thisIsObject[key]; 

// Example 2

delete thisIsObject["Cow"];

// Example 3

delete thisIsObject.Cow;

Interested in Java? Check out this Java Certification by Intellipaat.