Explore fun brain teasers to hone your logic, critical thinking, and problem-solving skills. Gain insights into Go and practice to avoid future mistakes.

go.tar.gz

Go lang

Who knew puzzles could be fun? Puzzles and brain teasers are a great way to practice your critical thinking and improve your logic and problem-solving skills. This course provides a basic understanding of Go. The teasers in this course will help you practice what you already know and help avoid future mistakes.

Go Brain Teasers

# Try it yourself ##
Try executing the code below to see the result for yourself.

package main

import (
	"encoding/json"
	"fmt"
	"log"
	"time"
)

func main() {
	t1 := time.Now()
	data, err := json.Marshal(t1)
	if err != nil {
		log.Fatal(err)
	}

	var t2 time.Time
	if err := json.Unmarshal(data, &t2); err != nil {
		log.Fatal(err)
	}
	fmt.Println(t1 == t2)
}


# Explanation ##
You might expect this code to fail since there’s no time type in the JSON format, or you might expect the comparison to succeed.

Go’s encoding/json package lets us define custom JSON serialization for types that JSON does not support.  We do that by implementing `json.Marshaler` and `json.Unmarshaler` interfaces. Go’s `time.Time` implements these interfaces by marshaling itself to an RFC 3339 formatted string and back.

JSON has a very limited set of types. For example, it only has floating-point numbers, which can lead to surprising results if we use the empty interface when unmarshaling.


Before We Begin

Puzzles

Wrapping Up

Puzzle 9 Explanation: Go Time API

Try it yourself

Explanation