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.

package main

import (
	"fmt"
)

var (
	id = nextID()
)

func nextID() int {
	id++
	return id
}

func main() {
	fmt.Println(id)
}




# Explanation ##
Building the code presents the following problem:
```
$ go build next_id.go
# command-line-arguments
./next_id.go:8:2: initialization loop:
/home/miki/Projects/go-brain-teasers/code/next_id.go:8:2: id refers to
/home/miki/Projects/go-brain-teasers/code/
next_id.go:11:6: nextID refers to
/home/miki/Projects/go-brain-teasers/code/next_id.go:8:2: id
```
There is an initialization loop in the code. The value of `id` depends on `nextID`,
which uses the value of `id`.

The Go compiler tries to find these loops, but there are cases in which it cannot detect them. These are called **hidden dependencies**.

Make sure your package initialization is simple and easy to understand. Try to avoid package-level variables, and defer initialization to the
`main` as much as
possible.

Before We Begin

Puzzles

Wrapping Up

Puzzle 23 Explanation: Go Next

Try it yourself