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带并发安全开关的双向列表。
使用场景：
双向链表。
使用方式：
import "github.com/gogf/gf/container/glist"
接口文档：
https://godoc.org/github.com/gogf/gf/container/glist
基础使用
| Code Block | ||
|---|---|---|
| ||
package main
import (
"fmt"
"github.com/gogf/gf/container/glist"
)
func main() {
// Not concurrent-safe in default.
l := glist.New()
// Push
l.PushBack(1)
l.PushBack(2)
e := l.PushFront(0)
// Insert
l.InsertBefore(e, -1)
l.InsertAfter(e, "a")
fmt.Println(l)
// Pop
fmt.Println(l.PopFront())
fmt.Println(l.PopBack())
fmt.Println(l)
// All
fmt.Println(l.FrontAll())
fmt.Println(l.BackAll())
// Output:
// [-1,0,"a",1,2]
// -1
// 2
// [0,"a",1]
// [0 "a" 1]
// [1 "a" 0]
} |
链表遍历
该示例中我们将通过读锁和写锁遍历一个并发安全的链表，分别通过RLockFunc和LockFunc实现。执行后，输出结果为：
| Code Block | ||
|---|---|---|
| ||
package main
import (
"container/list"
"fmt"
"github.com/gogf/gf/container/garray"
"github.com/gogf/gf/container/glist"
)
func main() {
// concurrent-safe list.
l := glist.NewFrom(garray.NewArrayRange(1, 10, 1).Slice(), true)
// iterate reading from head.
l.RLockFunc(func(list *list.List) {
length := list.Len()
if length > 0 {
for i, e := 0, list.Front(); i < length; i, e = i+1, e.Next() {
fmt.Print(e.Value)
}
}
})
fmt.Println()
// iterate reading from tail.
l.RLockFunc(func(list *list.List) {
length := list.Len()
if length > 0 {
for i, e := 0, list.Back(); i < length; i, e = i+1, e.Prev() {
fmt.Print(e.Value)
}
}
})
fmt.Println()
// iterate reading from head using IteratorAsc.
l.IteratorAsc(func(e *glist.Element) bool {
fmt.Print(e.Value)
return true
})
fmt.Println()
// iterate reading from tail using IteratorDesc.
l.IteratorDesc(func(e *glist.Element) bool {
fmt.Print(e.Value)
return true
})
fmt.Println()
// iterate writing from head.
l.LockFunc(func(list *list.List) {
length := list.Len()
if length > 0 {
for i, e := 0, list.Front(); i < length; i, e = i+1, e.Next() {
if e.Value == 6 {
e.Value = "M"
break
}
}
}
})
fmt.Println(l)
// Output:
// 12345678910
// 10987654321
// 12345678910
// 10987654321
// [1,2,3,4,5,"M",7,8,9,10]
} |
Push*元素项入栈
| Code Block | ||
|---|---|---|
| ||
package main
import (
"fmt"
"github.com/gogf/gf/container/glist"
"github.com/gogf/gf/frame/g"
)
func main() {
l := glist.NewFrom(g.Slice{1, 2, 3, 4, 5})
l.PushBack(6)
fmt.Println(l)
l.PushFront(0)
fmt.Println(l)
l.PushBacks(g.Slice{7, 8})
fmt.Println(l)
l.PushFronts(g.Slice{-1, -2})
fmt.Println(l)
l.PushFrontList(glist.NewFrom(g.Slice{"a", "b", "c"}))
l.PushBackList(glist.NewFrom(g.Slice{"d", "e", "f"}))
fmt.Println(l)
// Output:
// [1,2,3,4,5,6]
// [0,1,2,3,4,5,6]
// [0,1,2,3,4,5,6,7,8]
// [-2,-1,0,1,2,3,4,5,6,7,8]
// ["a","b","c",-2,-1,0,1,2,3,4,5,6,7,8,"d","e","f"]
} |
Pop*元素项出栈
| Code Block | ||
|---|---|---|
| ||
package main
import (
"fmt"
"github.com/gogf/gf/container/glist"
"github.com/gogf/gf/frame/g"
)
func main() {
l := glist.NewFrom(g.Slice{1, 2, 3, 4, 5, 6, 7, 8, 9})
fmt.Println(l.PopBack())
fmt.Println(l.PopBacks(2))
fmt.Println(l.PopFront())
fmt.Println(l.PopFronts(2))
fmt.Println(glist.NewFrom(g.Slice{"a", "b", "c", "d"}).PopFrontAll())
fmt.Println(glist.NewFrom(g.Slice{"a", "b", "c", "d"}).PopBackAll())
// Output:
// 9
// [8 7]
// 1
// [2 3]
// [4,5,6]
// [a b c d]
// [d c b a]
} |
Move*/Insert*元素项移动、插入
| Code Block | ||
|---|---|---|
| ||
package main
import (
"fmt"
"github.com/gogf/gf/container/glist"
"github.com/gogf/gf/frame/g"
)
func main() {
l := glist.NewFrom(g.Slice{1, 2, 3, 4, 5, 6, 7, 8, 9})
l.MoveToBack(l.Front())
l.MoveToFront(l.Back().Prev())
fmt.Println(l)
// 将2到栈首元素的前面
l.MoveBefore(l.Front().Next(), l.Front())
// 将8到栈尾元素的后面
l.MoveAfter(l.Back().Prev(), l.Back())
fmt.Println(l)
// 在栈尾元素前插入新元素
l.InsertBefore(l.Back(), "a")
// 在栈首元素后插入新元素
l.InsertAfter(l.Front(), "b")
// Output:
// [9,2,3,4,5,6,7,8,1]
// [2,9,3,4,5,6,7,1,8]
// [2,"b",9,3,4,5,6,7,1,"a",8]
} |
Join元素项串连
| Code Block | ||
|---|---|---|
| ||
package main
import (
"fmt"
"github.com/gogf/gf/container/glist"
"github.com/gogf/gf/frame/g"
)
func main() {
var l glist.List
l.PushBacks(g.Slice{"a", "b", "c", "d"})
fmt.Println(l.Join(","))
// Output:
// a,b,c,d
} |
Remove*元素项移除
| Code Block | ||
|---|---|---|
| ||
package main
import (
"fmt"
"github.com/gogf/gf/container/glist"
"github.com/gogf/gf/frame/g"
)
func main() {
l := glist.NewFrom(g.Slice{0, 1, 2, 3, 4, 5, 6, 7, 8, 9})
fmt.Println(l.Remove(l.Front()))
fmt.Println(l)
l.Removes([]*glist.Element{l.Front(), l.Front().Next()})
fmt.Println(l)
l.RemoveAll()
fmt.Println(l)
// Output:
// [0,1,2,3,4,5,6,7,8,9]
// [1,2,3,4,5,6,7,8,9]
// [3,4,5,6,7,8,9]
// []
} |
JSON序列化/反序列
glist容器实现了标准库json数据格式的序列化/反序列化接口。
Marshal
| Code Block | ||
|---|---|---|
| ||
package main
import (
"encoding/json"
"fmt"
"github.com/gogf/gf/container/glist"
"github.com/gogf/gf/frame/g"
)
func main() {
type Student struct {
Id int
Name string
Scores *glist.List
}
s := Student{
Id: 1,
Name: "john",
Scores: glist.NewFrom(g.Slice{100, 99, 98}),
}
b, _ := json.Marshal(s)
fmt.Println(string(b))
// Output:
// {"Id":1,"Name":"john","Scores":[100,99,98]}
} |
Unmarshal
| Code Block | ||
|---|---|---|
| ||
package main
import (
"encoding/json"
"fmt"
"github.com/gogf/gf/container/glist"
)
func main() {
b := []byte(`{"Id":1,"Name":"john","Scores":[100,99,98]}`)
type Student struct {
Id int
Name string
Scores *glist.List
}
s := Student{}
json.Unmarshal(b, &s)
fmt.Println(s)
// Output:
// {1 john [100,99,98]}
} |
性能测试
https://github.com/gogf/gf/blob/master/container/glist/glist_z_bench_test.go
goos: linux
goarch: amd64
pkg: github.com/gogf/gf/container/glist
Benchmark_PushBack-4 5000000 268 ns/op 56 B/op 2 allocs/op
Benchmark_PushFront-4 10000000 435 ns/op 56 B/op 2 allocs/op
Benchmark_Len-4 30000000 44.5 ns/op 0 B/op 0 allocs/op
Benchmark_PopFront-4 20000000 71.1 ns/op 0 B/op 0 allocs/op
Benchmark_PopBack-4 30000000 70.1 ns/op 0 B/op 0 allocs/op
PASS
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