How to clear json object value as empty in javascript/JQuery

Question

var myObj;

myObj = [{ "name":"John", "age":30, "car":"maruti" },{ "name":"Smith", "age":50, "car":"indica" }];

 

I want to get json

 

[{ "name":"", "age":, "car":"" },{ "name":"", "age":, "car":"" }];

 

please solve this problem.