我編寫了這段代碼來制作切片副本，它工作正常，作為參數傳遞給函數的主切片不受影響：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}但是在我的其他代碼中，即使我將原始切片傳遞clone給函數，原始切片也會發生變化：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運行函數后正在發生變化，盡管我沒有將它傳遞到那里，并且ins_clone()在函數之后發生變化，盡管我在函數代碼的第一行克隆了它，對于outs和outs_clone()
1 回答
梵蒂岡之花
TA貢獻1900條經驗 獲得超5個贊
我明白了，原因是我的切片包含一個sub slice所以copy對頂部有用但不適用于共享相同數據的子切片，我通過創建一個新切片重寫代碼來修復它，推送數據到它，然后用它來替換原來的數據，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
}
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