Go SimpleQueue

type SimpleQueue struct {
    data []int
    head int
    tail int
}

func NewSimpleQueue() *SimpleQueue {
    return &SimpleQueue{data: make([]int, 10), head: 0, tail: 0}
}

func (sq *SimpleQueue) Add(element int) bool {
    sq.data[sq.tail] = element
    sq.tail++
    return true
}

func (sq *SimpleQueue) Peek() (element int) {
    element = sq.data[sq.head]
    sq.head++
    return element
}

func (sq *SimpleQueue) Poll() (element int) {
    return sq.data[sq.head]
}