Search⌘ K
Home
Courses
The Way to Go

Solution Review: Magnify a Slice

Explore how to enlarge a Go slice by defining a function that creates a new slice with a length multiplied by a given factor and copies original elements. Understand slice initialization, manipulation, and verification to solve common array and slice challenges in Go.

We'll cover the following...
Go (1.6.2)
package main
import "fmt"
var s []int
func main() {
	s = []int{1, 2, 3}
	fmt.Println("The length of s before enlarging is:", len(s))
	fmt.Println(s)
	s = enlarge(s, 5)	// calling function to magnify
	fmt.Println("The length of s after enlarging is:", len(s))
	fmt.Println(s)
}
func enlarge(s []int, factor int) []int {
	ns := make([]int, len(s) * factor)		// making a new slice of length len(s)*factor
	copy(ns, s)	// copying contents from s to new slice
	return ns
}

In the code above, look at the header for function enlarge at line 15: func enlarge(s []int, factor int) []int . It takes a slice s that needs to be magnified, and a factor to decide the length of a magnified slice as len(s)*factor. ...