這是我的代碼{ saruman := map[string]int{ "power": 150, "skills": 200, "knowledge": 380, } gandalf := map[string]int{ "power": 180, "skills": 210, "knowledge": 240, } wizards := make(map[string]interface{}) wizards["saruman"] = saruman wizards["gandalf"] = gandalf fmt.Println(wizards) //OK map[gandalf:map[knowledge:240 power:180 skills:210] saruman:map[knowledge:380 power:150 skills:200]] //change gandalf property wizards["gandalf"]["knowledge"] = 310 fmt.Println(wizards)}在最后一行，我們得到：NOK無效操作：wizards["gandalf"]["knowledge"]（類型接口{}不支持索引）
3 回答
汪汪一只貓
TA貢獻1898條經驗 獲得超8個贊
您不能使用它["key"]來訪問 golang 不知道的結構。因為它是interface{}甘道夫背后的價值，可以是任何東西。
wizards["gandalf"] = map[string]int{
"knowledge": 310,
}您必須指定要與之交互的數據類型。
游樂場：https ://goplay.tools/snippet/O62ara8JbUv
慕慕森
TA貢獻1856條經驗 獲得超17個贊
這是更簡單的方法：
一行代碼
wizards["gandalf"].(map[string]int)["knowledge"] = 110
完整示例：
saruman := map[string]int{
"power": 150,
"skills": 200,
"knowledge": 380,
}
gandalf := map[string]int{
"power": 180,
"skills": 210,
"knowledge": 240,
}
wizards := make(map[string]interface{})
wizards["saruman"] = saruman
wizards["gandalf"] = gandalf
// fmt.Println(wizards)
// OK map[gandalf:map[knowledge:240 power:180 skills:210] saruman:map[knowledge:380 power:150 skills:200]]
// change gandalf property
wizards["gandalf"].(map[string]int)["knowledge"] = 110
fmt.Println(wizards["gandalf"].(map[string]int)["knowledge"])
吃雞游戲
TA貢獻1829條經驗 獲得超7個贊
需要投。
{
saruman := map[string]int{
"power": 150,
"skills": 200,
"knowledge": 380,
}
gandalf := map[string]int{
"power": 180,
"skills": 210,
"knowledge": 240,
}
wizards := make(map[string]interface{})
wizards["saruman"] = saruman
wizards["gandalf"] = gandalf
fmt.Println(wizards)
//OK map[gandalf:map[knowledge:240 power:180 skills:210] saruman:map[knowledge:380 power:150 skills:200]]
//change gandalf property
wizards["gandalf"].(map[string]int)["knowledge"] = 10
fmt.Println(wizards)
}
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