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golang omit

Restu Wahyu Saputra answered on April 19, 2023 Popularity 1/10 Helpfulness 1/10

answer golang omit

golang omit

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package main

import (
	"fmt"
	"reflect"
	"sync"
	"sync/atomic"
)

func Omit(src interface{}, fields []string) (map[string]interface{}, error) {
	var (
		mutex              *sync.RWMutex          = &sync.RWMutex{}
		safeValueAssignMap *atomic.Value          = &atomic.Value{}
		safeValueMap       *atomic.Value          = &atomic.Value{}
		maps               map[string]interface{} = make(map[string]interface{})
	)

	if ok := reflect.ValueOf(src).CanConvert(reflect.TypeOf(maps)); !ok {
		return nil, fmt.Errorf("src must be a map type not %s", reflect.ValueOf(src).Kind().String())
	}

	srcValueMaps, err := InterfaceToMap(src)
	if err != nil {
		return nil, err
	}

	mapLength := len(reflect.ValueOf(srcValueMaps).MapKeys()) - len(fields)

	for k, v := range srcValueMaps {
		assingMap := make(map[string]interface{}, mapLength)
		safeValueAssignMap.Store(assingMap)

		for i := 0; i < len(fields); i++ {
			if srcValueMaps[fields[i]] == v {
				delete(maps, fields[i])
				break
			} else {
				mutex.Lock()
				assingMap[k] = v

				maps, err = MergeMap(maps, safeValueAssignMap.Load())
				if err != nil {
					return nil, err
				}

				safeValueMap.Store(maps)
				mutex.Unlock()

				defer func() {
					assingMap = nil
				}()
			}
		}
	}

	defer func() {
		maps = nil
	}()

	return safeValueMap.Load().(map[string]interface{}), nil
}

func main() {
	body := make(map[string]interface{})
	body["name"] = "john doe"
	body["age"] = 23
	body["address"] = "jl.arif rahman"
	body["city"] = "depok"
	body["country"] = "indonesia"
	body["state"] = "jawa barat"
	body["postcode"] = "14436"

	res, err := OmitForMap(body, []string{"name", "age", "address"})
	if err != nil {
		fmt.Println(err.Error())
	}

	fmt.Println(res) // map[city:depok country:indonesia postcode:14436 state:jawa barat]
}

Popularity 1/10 Helpfulness 1/10 Language go

Source: Grepper

Tags: go

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Contributed on Apr 19 2023

Restu Wahyu Saputra

0 Answers Avg Quality 2/10

golang omit

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