Go Brain Teasers

Puzzle 10

A Simple Append

append.go

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)
}

Guess the Output
	Try to guess what the output is before moving to the next page.

This code will print: a=[1 10 3], b=[1 10]

You’ll need to dig a bit into how slices are implemented and how append works to understand why you seed this output.

If you look at ...