Group by and filter in jquery

I have json like 

abcArr = [[FirstName:"A",LastName:"B",FullName:"AB",Email:"[email protected]"],

[FirstName:"A",LastName:"B",FullName:"AB",Email:"[email protected]"],

[FirstName:"C",LastName:"D",FullName:"CD",Email:"[email protected]"]]

and i want out put like this 

OUTPUT [[[FirstName:"A",LastName:"B",FullName:"[email protected]",Email:"[email protected]"],

[FirstName:"A",LastName:"B",FullName:"[email protected]",Email:"[email protected]"],

[FirstName:"C",LastName:"D",FullName:"CD",Email:"[email protected]"]]

 

in this array if group by on firstname and lastname and there count greater than 0 then email id added with firtname and last name and make full name and if count equal to 0 then emailid not aaded to fullname