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  1. Prepare
  2. Tutorials
  3. 30 Days of Code
  4. Day 8: Dictionaries and Maps
  5. Discussions

Day 8: Dictionaries and Maps

  • neilr
     + 0 comments

    I'm trying to solve this in Go and all of my attempts are timing out on test cases 1 - 3, despite working on the sample input 0. I think it's the loop reading/handling the query names, but I don't know why. Some examples:

    // Using a Scanner to handle queries
scanner := bufio.NewScanner(os.Stdin)
for scanner.Scan() {
	name := scanner.Text()
	if phone, ok := addressBook[name]; !ok {
		fmt.Println("Not found")
	} else {
		fmt.Printf("%s=%s\n", name, phone)
	}
}
if err := scanner.Err(); err != nil {
	log.Fatal(err)
}

// Using fmt.Scan to handle queries
var query string
for {
	_, err := fmt.Scan(&query)
	if err != nil {
		if err == io.EOF {
			break
		}
		log.Fatal(err)
	}
	if phone, ok := addressBook[query]; !ok {
		fmt.Println("Not found")
	} else {
		fmt.Printf("%s=%s\n", query, phone)
	}
}

// Reading all of STDIN then iterating over it
stdin, err := io.ReadAll(os.Stdin)
if err != nil {
	log.Fatal(err)
}

queries := strings.Split(string(stdin), "\n")
for _, name := range queries {
	if phone, ok := addressBook[name]; !ok {
		fmt.Println("Not found")
	} else {
		fmt.Printf("%s=%s\n", name, phone)
	}
}