普通数组

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
)

func main () {
    // 创建并发安全的int类型数组
    a := garray.NewIntArray(true)

    // 添加数据项
    for i := 0; i < 10; i++ {
        a.Append(i)
    }

    // 获取当前数组长度
    fmt.Println(a.Len())

    // 获取当前数据项列表
    fmt.Println(a.Slice())

    // 获取指定索引项
    fmt.Println(a.Get(6))

    // 在指定索引后插入数据项
    a.InsertAfter(9, 11)
    // 在指定索引前插入数据项
    a.InsertBefore(10, 10)
    fmt.Println(a.Slice())

    // 修改指定索引的数据项
    a.Set(0, 100)
    fmt.Println(a.Slice())

    // 搜索数据项，返回搜索到的索引位置
    fmt.Println(a.Search(5))

    // 删除指定索引的数据项
    a.Remove(0)
    fmt.Println(a.Slice())

    // 并发安全，写锁操作
    a.LockFunc(func(array []int) {
        // 将末尾项改为100
        array[len(array) - 1] = 100
    })

    // 并发安全，读锁操作
    a.RLockFunc(func(array []int) {
        fmt.Println(array[len(array) - 1])
    })

    // 清空数组
    fmt.Println(a.Slice())
    a.Clear()
    fmt.Println(a.Slice())
}

执行后，输出结果为：

[0 1 2 3 4 5 6 7 8 9]
6 true
[0 1 2 3 4 5 6 7 8 9 10 11]
[100 1 2 3 4 5 6 7 8 9 10 11]
5
[1 2 3 4 5 6 7 8 9 10 11]
100
[1 2 3 4 5 6 7 8 9 10 100]
[]

排序数组

排序数组的方法与普通数组类似，但是带有自动排序功能及唯一性过滤功能。

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
)

func main () {
    // 自定义排序数组，降序排序(SortedIntArray管理的数据是升序)
    a := garray.NewSortedArray(func(v1, v2 interface{}) int {
        if v1.(int) < v2.(int) {
            return 1
        }
        if v1.(int) > v2.(int) {
            return -1
        }
        return 0
    })

    // 添加数据
    a.Add(2)
    a.Add(3)
    a.Add(1)
    fmt.Println(a.Slice())

    // 添加重复数据
    a.Add(3)
    fmt.Println(a.Slice())

    // 检索数据，返回最后对比的索引位置，检索结果
    // 检索结果：0: 匹配; <0:参数小于对比值; >0:参数大于对比值
    fmt.Println(a.Search(1))

    // 设置不可重复
    a.SetUnique(true)
    fmt.Println(a.Slice())
    a.Add(1)
    fmt.Println(a.Slice())
}

执行后，输出结果：

[3 2 1]
[3 3 2 1]
3 0
[3 2 1]
[3 2 1]

Iterate* 数组遍历

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
    "github.com/gogf/gf/v2/frame/g"
)

func main() {
    array := garray.NewStrArrayFrom(g.SliceStr{"a", "b", "c"})
    // Iterator is alias of IteratorAsc, which iterates the array readonly in ascending order
    //  with given callback function <f>.
    // If <f> returns true, then it continues iterating; or false to stop.
    array.Iterator(func(k int, v string) bool {
        fmt.Println(k, v)
        return true
    })
    // IteratorDesc iterates the array readonly in descending order with given callback function <f>.
    // If <f> returns true, then it continues iterating; or false to stop.
    array.IteratorDesc(func(k int, v string) bool {
        fmt.Println(k, v)
        return true
    })

    // Output:
    // 0 a
    // 1 b
    // 2 c
    // 2 c
    // 1 b
    // 0 a
}

Pop* 数组项出栈

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
)

func main() {
    array := garray.NewFrom([]interface{}{1, 2, 3, 4, 5, 6, 7, 8, 9})

    // Any Pop* functions pick, delete and return the item from array.

    fmt.Println(array.PopLeft())
    fmt.Println(array.PopLefts(2))
    fmt.Println(array.PopRight())
    fmt.Println(array.PopRights(2))

    // Output:
    // 1 true
    // [2 3]
    // 9 true
    // [7 8]
}

Rand/PopRand 数组项随机获取/出栈

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
    "github.com/gogf/gf/v2/frame/g"
)

func main() {
    array := garray.NewFrom(g.Slice{1, 2, 3, 4, 5, 6, 7, 8, 9})

    // Randomly retrieve and return 2 items from the array.
    // It does not delete the items from array.
    fmt.Println(array.Rands(2))

    // Randomly pick and return one item from the array.
    // It deletes the picked up item from array.
    fmt.Println(array.PopRand())
}

Contains/ContainsI 包含判断

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
)

func main() {
    var array garray.StrArray
    array.Append("a")
    fmt.Println(array.Contains("a"))
    fmt.Println(array.Contains("A"))
    fmt.Println(array.ContainsI("A"))

    // Output:
    // true
    // false
    // true
}

FilterEmpty/FilterNil 空值过滤

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
    "github.com/gogf/gf/v2/frame/g"
)

func main() {
    array1 := garray.NewFrom(g.Slice{0, 1, 2, nil, "", g.Slice{}, "john"})
    array2 := garray.NewFrom(g.Slice{0, 1, 2, nil, "", g.Slice{}, "john"})
    fmt.Printf("%#v\n", array1.FilterNil().Slice())
    fmt.Printf("%#v\n", array2.FilterEmpty().Slice())

    // Output:
    // []interface {}{0, 1, 2, "", []interface {}{}, "john"}
    // []interface {}{1, 2, "john"}
}

Reverse 数组反转

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
    "github.com/gogf/gf/v2/frame/g"
)

func main() {
    array := garray.NewFrom(g.Slice{1, 5, 3})

    // Reverse makes array with elements reverse.
    fmt.Println(array.Reverse().Slice())

    // Output:
    // [3 5 1]
}

Shuffle 随机排序

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
    "github.com/gogf/gf/v2/frame/g"
)

func main() {
    array := garray.NewFrom(g.Slice{1, 2, 3, 4, 5, 6, 7, 8, 9})

    // Shuffle randomly shuffles the array.
    fmt.Println(array.Shuffle().Slice())
}

Walk 遍历修改

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
    "github.com/gogf/gf/v2/frame/g"
)

func main() {
    var array garray.StrArray
    tables := g.SliceStr{"user", "user_detail"}
    prefix := "gf_"
    array.Append(tables...)
    // Add prefix for given table names.
    array.Walk(func(value string) string {
        return prefix + value
    })
    fmt.Println(array.Slice())

    // Output:
    // [gf_user gf_user_detail]
}

Join 数组项串连

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
    "github.com/gogf/gf/v2/frame/g"
)

func main() {
    array := garray.NewFrom(g.Slice{"a", "b", "c", "d"})
    fmt.Println(array.Join(","))

    // Output:
    // a,b,c,d
}

Chunk 数组拆分

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
    "github.com/gogf/gf/v2/frame/g"
)

func main() {
    array := garray.NewFrom(g.Slice{1, 2, 3, 4, 5, 6, 7, 8, 9})

    // Chunk splits an array into multiple arrays,
    // the size of each array is determined by <size>.
    // The last chunk may contain less than size elements.
    fmt.Println(array.Chunk(2))

    // Output:
    // [[1 2] [3 4] [5 6] [7 8] [9]]
}

Merge 数组合并

package main

import (
    "fmt"
    "github.com/gogf/gf/v2/container/garray"
    "github.com/gogf/gf/v2/frame/g"
)

func main() {
    array1 := garray.NewFrom(g.Slice{1, 2})
    array2 := garray.NewFrom(g.Slice{3, 4})
    slice1 := g.Slice{5, 6}
    slice2 := []int{7, 8}
    slice3 := []string{"9", "0"}
    fmt.Println(array1.Slice())
    array1.Merge(array1)
    array1.Merge(array2)
    array1.Merge(slice1)
    array1.Merge(slice2)
    array1.Merge(slice3)
    fmt.Println(array1.Slice())

    // Output:
    // [1 2]
    // [1 2 1 2 3 4 5 6 7 8 9 0]
}

JSON 序列化/反序列

garray 模块下的所有容器类型均实现了标准库 json 数据格式的序列化/反序列化接口。

1. Marshal

package main

import (
       "encoding/json"
       "fmt"
       "github.com/gogf/gf/v2/container/garray"
)

func main() {
       type Student struct {
           Id     int
           Name   string
           Scores *garray.IntArray
       }
       s := Student{
           Id:     1,
           Name:   "john",
           Scores: garray.NewIntArrayFrom([]int{100, 99, 98}),
       }
       b, _ := json.Marshal(s)
       fmt.Println(string(b))
}

执行后，输出结果：

    {"Id":1,"Name":"john","Scores":[100,99,98]}

2. Unmarshal

package main


import (
       "encoding/json"
       "fmt"
       "github.com/gogf/gf/v2/container/garray"
)


func main() {
       b := []byte(`{"Id":1,"Name":"john","Scores":[100,99,98]}`)
       type Student struct {
           Id     int
           Name   string
           Scores *garray.IntArray
       }
       s := Student{}
       json.Unmarshal(b, &s)
       fmt.Println(s)
}

执行后，输出结果：

{1 john [100,99,98]}