64 lines
1017 B
Go
64 lines
1017 B
Go
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package main
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import "fmt"
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// 容器接口
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type IAggregate interface {
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Iterator() IIterator
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}
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// 迭代器接口
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type IIterator interface {
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HasNext() bool
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Current() int
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Next() bool
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}
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// 具体容器
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type Aggregate struct {
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container []int // 容器中装载 int 型容器
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}
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type Iterator struct {
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cursor int // 当前游标
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aggregate Aggregate
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}
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func (i *Iterator) HasNext() bool {
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if i.cursor+1 < len(i.aggregate.container) {
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return true
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}
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return false
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}
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func (i *Iterator) Current() int {
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return i.aggregate.container[i.cursor]
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}
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func (i *Iterator) Next() bool {
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if i.cursor < len(i.aggregate.container) {
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i.cursor++
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return true
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}
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return false
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}
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func (a *Aggregate) Iterator() IIterator {
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i := new(Iterator)
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i.aggregate = a
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return i
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}
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func main() {
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// 创建容器，并放入初始化数据
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c := &Aggregate{container: []int{1, 2, 3, 4}}
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iterator := c.Iterator()
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for {
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fmt.Println(iterator.Current())
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if iterator.HasNext() {
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iterator.Next()
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} else {
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break
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}
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}
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}
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