package fit

//Item interface has to be implemented by the items which should be packed.
type Item interface {
	Size() int64
}

//ItemsBySize implements sort.Interface
type ItemsBySize []Item

func (x ItemsBySize) Len() int           { return len(x) }
func (x ItemsBySize) Less(i, j int) bool { return x[i].Size() < x[j].Size() }
func (x ItemsBySize) Swap(i, j int)      { x[i], x[j] = x[j], x[i] }