1var employees = {
2    accounting: []
3};
4
5for(var i in someData) {    
6
7    var item = someData[i];   
8
9    employees.accounting.push({ 
10        "firstName" : item.firstName,
11        "lastName"  : item.lastName,
12        "age"       : item.age 
13    });
14}
15

1var array = ['a', 1, 'b', 2, 'c', 3],
2    object = {},
3    i
4
5for (var i = 0; i < array.length; i += 2) {
6    object[array[i]] = array[i + 1];
7}
8
9console.log(object);