go 笛卡尔乘积 实现sku

1数据源

[
    [
        {2714 白色 0xc000180d80 0xc0000f1110 0xc000044e40} 
        {2715 屎黄色 0xc000180ea0 0xc0000f11f0 0xc000044ea0}
        {2720 绿色 0xc000180fc0 0xc0000f1340 0xc000045020}
    ] 
    [
        {2717 纯棉 0xc000181320 0xc0000f1420 0xc000045380}
    ] 
    [
        {2716 30寸 0xc000181680 0xc0000f1500 0xc00099c2a0} 
        {2718 60寸 0xc0001817a0 0xc0000f15e0 0xc00099c300}
    ]
]

2代码实现

func(this *GoodsController)GetSku(goods_attrs [][]models.GoodsAttr)([][]models.GoodsAttr){
	arrlen:=len(goods_attrs)//列
	sku:=make([][]models.GoodsAttr,0)
	for _,val :=range goods_attrs[0] {
		temps := make([]models.GoodsAttr, 0)
		temps = append(temps,val)
		sku =append(sku,temps)
	}
	for i:=0;i