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 (
	"fmt"
)

func main() {
	a := []int{1, 2, 3}
	b := append(a[:1], 10)
	fmt.Printf("a=%v, b=%v\n", a, b)
}



# Explanation ##
We’ll need to dig a bit into how slices are implemented and how `append` works
to understand why we seed this output.

If we look at *`src/runtime/slice.go`* in the Go source code, we will see:

type slice struct {
    array unsafe.Pointer
    len int
    cap int
}

Above, `slice` is a struct with three fields. We use `array` as a pointer to the underlying array that holds the data. Next, `len` is the length of the slice. The `cap` is the capacity of the underlying array.

Here’s an illustrated example:

Before We Begin

Puzzles

Wrapping Up

Puzzle 10 Explanation: Simple Append

Try it yourself

Explanation