英文:
golang DeepEqual: when the type of value of interface map is array, the DeepEqual is invalidation
问题
当接口映射中的数组(content为数字111或数组)时，为什么DeepEqual的返回值是false？而当content的值为字符串或映射时，DeepEqual的返回值是true。
英文:
package main
import (
"encoding/json"
"fmt"
"reflect"
)
func main() {
nodeArray := map[string]interface{}{
"meta": map[string]interface{}{
"category": "paragraph"}, "content": []string{"111"}}
// content is number as 111 or array
b, _ := json.Marshal(&nodeArray)
var nodeArrayTest map[string]interface{}
json.Unmarshal(b, &nodeArrayTest)
if !reflect.DeepEqual(nodeArray, nodeArrayTest) {
fmt.Println("!!!! odeArray and nodeArrayTest should be equal")
} else {
fmt.Println("odeArray and nodeArrayTest equal")
}
}
Why when the interface map has array(content is number as 111 or array), the return of DeepEqual is false? And when the content value is a string, a map, the DeepEqual is true.
答案1
得分: 3
打印出这两个值，我们可以看到它们是不同的：
nodeArray = map[string]interface {}{"meta":map[string]interface {}{"category":"paragraph"}, "content":[]string{"111"}}
nodeArrayTest = map[string]interface {}{"content":[]interface {}{"111"}, "meta":map[string]interface {}{"category":"paragraph"}}
特别地，nodeArray["content"] 是一个 []string 切片，而 nodeArrayTest["content"] 是一个 []interface{} 切片。由于类型不匹配，reflect.DeepEqual 函数认为它们不相等。
encoding/json 模块将解码为 []interface{} 切片，因为 JSON 数组可以包含不同类型的值。
英文:
Printing out the two values, in question, we can see that they are different:
nodeArray = map[string]interface {}{"meta":map[string]interface {}{"category":"paragraph"}, "content":[]string{"111"}}
nodeArrayTest = map[string]interface {}{"content":[]interface {}{"111"}, "meta":map[string]interface {}{"category":"paragraph"}}
In particular, nodeArray["content"] is a []string slice, while nodeArrayTest["content"] is a a []interface{} slice. The reflect.DeepEqual function does not consider these equal due to the type mismatch.
The encoding/json module decodes into an []interface{} slice because JSON arrays can contain values of different types.
答案2
得分: -2
aaa := map[string]interface {}{"meta":map[string]interface {}{"category":"段落"}, "content":[]string{"111","222"}}
bbb := map[string]interface {}{"content":[]string{"222","111"}, "meta":map[string]interface {}{"category":"段落"}}
这是不正确的。
英文:
aaa := map[string]interface {}{"meta":map[string]interface {}{"category":"paragraph"}, "content":[]string{"111","222"}}
bbb := map[string]interface {}{"content":[]string{"222","111"}, "meta":map[string]interface {}{"category":"paragraph"}}
It's not true.
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