JAVASCRIPT

js create json array

var employees = {
    accounting: []
};

for(var i in someData) {    

    var item = someData[i];   

    employees.accounting.push({ 
        "firstName" : item.firstName,
        "lastName"  : item.lastName,
        "age"       : item.age 
    });
}

javascript create json object from array

var array = ['a', 1, 'b', 2, 'c', 3],
    object = {},
    i

for (var i = 0; i < array.length; i += 2) {
    object[array[i]] = array[i + 1];
}

console.log(object);