Merge List Name Value like Json

merge_list_name_value.go

package main

import (
	"encoding/json"
	"fmt"
)

type Param struct {
	Name  string `json:"name"`
	Value interface{} `json:"value"`
}

func List2Map(l []Param) map[string]interface{} {
	result := make(map[string]interface{})
	for _,i := range l {
		result[i.Name] = i.Value
	}
	return result
}

func Map2List(o map[string]interface{}) []Param {
	var result []Param

	for i := range o {
		result = append(result, Param{Name: i, Value: o[i]})
	}
	return result
}


func MergeMap(old,  ne map[string]interface{}) map[string]interface{} {
	result := make(map[string]interface{})


	for i := range old {
		result[i] = old[i]
	}

	for i := range ne {
		result[i] = ne[i]
	}

	return result
}

func MergeMapString(old, ne string) ([]Param, error) {
	var oldParams []Param
	err := json.Unmarshal([]byte(old), &oldParams)
	if err!=nil {
		return nil, err
	}
	//fmt.Println(oldParams)

	var newParams []Param
	err = json.Unmarshal([]byte(ne), &newParams)
	if err!=nil {
		return nil, err
	}

	//fmt.Println(newParams)

	oldMap := List2Map(oldParams)
	newMap := List2Map(newParams)
	rstMap := MergeMap(oldMap, newMap)

	rstList := Map2List(rstMap)
	return rstList, nil
}

func main() {
	//ne := `[{"name": "fullversion", "value": "01010101"}, {"name": "hello", "value": "world"}]`
	//old := `[{"name": "fullversion", "value": ""}, {"name": "gitaddress", "value": "git://"}]`

	ne := `[{"name": "fullversion", "value": "01010101"}, {"name": "hello", "value": 1}]`
	old := `[{"name": "fullversion", "value": ""}, {"name": "gitaddress", "value": "git://"}, {"name": "hello", "value": 0}]`

	rstList, err:= MergeMapString(old, ne)
	if err!=nil {
		fmt.Println("err")
	}
	fmt.Println(rstList)
}