切片在复制并使用副本后发生变化

Question

我编写了这段代码来制作切片副本，它工作正常，作为参数传递给函数的主切片不受影响：package mainimport "fmt"type Team []Persontype Person struct {    Name string    Age  int}func main() {    team := Team{        Person{"Hasan", 34}, Person{"Karam", 32},    }    fmt.Printf("original before clonning: %v\n", team)    team_cloned := team.Clone()    fmt.Printf("original after clonning: %v\n", team)    fmt.Printf("clones slice: %v\n", team_cloned)}func (c *Team) Clone() Team {    var s = make(Team, len(*c))    copy(s, *c)    for index, _ := range s {        s[index].Name = "change name"    }    return s}但是在我的其他代码中，即使我将原始切片传递clone给函数，原始切片也会发生变化：type Inventories []Inventorytype Inventory struct { //instead of: map[string]map[string]Pairs    Warehouse string    Item      string    Batches   Lots}type Lots []Lottype Lot struct {    Date  time.Time    Key   string    Value float64}func (c *Inventories) Clone() Inventories {    var s = make(Inventories, len(*c))    copy(s, *c)    return s}func (outs Inventories) BuildBatchesFrom(ins Inventories) (batchesBalance Inventories, outgoing Inventories) {    batchesOut := Inventories{}    for _, in := range batchesBalance {        for _, out := range outgoing {            if out.Warehouse == in.Warehouse && out.Item == in.Item {                batches := Lots{}            OUTER:                for {                    oldestBatch := in.Batches.First()                    batchQty := math.Min(in.Batches.First().Value, math.Abs(out.Batches.First().Value))                    batches = append(batches, Lot{out.Batches.First().Date, oldestBatch.Key, batchQty})                    out.Batches[0].Value = out.Batches.First().Value + batchQty                    in.Batches[0].Value = oldestBatch.Value - batchQty                    if in.Batches.First().Value == 0 {                        in.Batches.PopFirst()                    }在上面，ins运行函数后正在发生变化，尽管我没有将它传递到那里，并且ins_clone()在函数之后发生变化，尽管我在函数代码的第一行克隆了它，对于outs和outs_clone()

Answer 1

我明白了，原因是我的切片包含一个sub slice所以copy对顶部有用但不适用于共享相同数据的子切片，我通过创建一个新切片重写代码来修复它，推送数据到它，然后用它来替换原来的数据，如下所示：

func (i *Inventories) CloneFrom(c Inventories) {

    inv := new(Inventories)

    for _, v := range c {

        batches := Lots{}

        for _, b := range v.Batches {

            batches = append(batches, Lot{

                Date:  b.Date,

                Key:   b.Key,

                Value: b.Value,

            })

        }

        *inv = append(*inv, Inventory{

            Warehouse: v.Warehouse,

            Item:      v.Item,

            Batches:   batches,

        })

    }

    (*i).ReplaceBy(inv)

}

func (i *Inventories) ReplaceBy(x *Inventories) {

    *i = *x

}