How can I update an object with another object?
for example
master = { name: "John", email: "j@j.com" }
child = { phone: "888-333-3999" }
How can I  update master with child?
Output of master need to be 
{ name: "John", email: "j@j.com", phone: "888-333-3999" }
Also, this is a node.js JavaScript, I don't want to use jQuery.
 
     
    