main.go

package main

import (
	"fmt"
	"sync"
)

func logCounter() {
	var counter sync.Map
	var wg sync.WaitGroup
	logs := []string{"INFO", "WARNING", "DEBUG", "ERROR", "FATAL", "DEBUG", "DEBUG"}

	recordLog := func (logType string)  {
		value, _ := counter.LoadOrStore(logType, 0)
		count := value.(int)
		counter.Store(logType, count + 1)
	}

	for _, v := range logs {
		wg.Add(1)
		go func (k string)  {
			defer wg.Done()
			recordLog(k)
		}(v)
	}
	wg.Wait()

	counter.Range(func(key, value any) bool {
		fmt.Printf("Log Type: %s, Count: %d\n", key, value)
		return true
	})
}

func expensiveCache() {
	var computationCache sync.Map

	expensiveComputation := func (input int) int  {
		return input * input
	}

	getResult := func (input int) int  {
		if value, ok := computationCache.Load(input); ok {
			return value.(int)
		}

		result := expensiveComputation(input)
		computationCache.Store(input, result)
		return result
	}

	fmt.Println("Result 1:", getResult(9999))
	fmt.Println("Result 2:", getResult(9999))  
	fmt.Println("Result 3:", getResult(9))
}

func main() {
	logCounter()
	expensiveCache() 
}