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How to Shuffle an Array in Go

How to Shuffle an Array in Go ?

Answer

In Go, you can shuffle an array using the Fisher-Yates shuffle algorithm.


✐ Examples

1 Shuffle Array of Integers

In this example,

  1. We have an array named intArray containing integers.
  2. We apply the Fisher-Yates shuffle algorithm to intArray.
  3. We print the shuffled array to demonstrate the shuffling.

Go Program

package main
import (
	"fmt"
	"math/rand"
	"time"
)
func shuffleArray(array []int) {
	rand.Seed(time.Now().UnixNano())
	for i := len(array) - 1; i > 0; i-- {
		j := rand.Intn(i + 1)
		array[i], array[j] = array[j], array[i]
	}
}
func main() {
	intArray := []int{1, 2, 3, 4, 5}
	shuffleArray(intArray)
	fmt.Println("Shuffled Array:", intArray)
}

Output

Shuffled Array: [3 1 4 5 2]

2 Shuffle Array of Strings

In this example,

  1. We have an array named strArray containing strings.
  2. We apply the Fisher-Yates shuffle algorithm to strArray.
  3. We print the shuffled array to demonstrate the shuffling.

Go Program

package main
import (
	"fmt"
	"math/rand"
	"time"
)
func shuffleArray(array []string) {
	rand.Seed(time.Now().UnixNano())
	for i := len(array) - 1; i > 0; i-- {
		j := rand.Intn(i + 1)
		array[i], array[j] = array[j], array[i]
	}
}
func main() {
	strArray := []string{"apple", "banana", "cherry"}
	shuffleArray(strArray)
	fmt.Println("Shuffled Array:", strArray)
}

Output

Shuffled Array: [banana cherry apple]

Summary

In this tutorial, we learned How to Shuffle an Array in Go language with well detailed examples.


More Go Arrays Tutorials

  1. How to Declare an Array in Go ?
  2. How to Initialize an Array in Go ?
  3. How to Access Array Elements in Go ?
  4. How to Access Array Elements using Index in Go ?
  5. How to get First Element in Array in Go ?
  6. How to get Last Element in Array in Go ?
  7. How to check if an Array is Empty in Go ?
  8. How to check if an Array is Not Empty in Go ?
  9. How to get Sub Array in Go ?
  10. How to Get Array Length in Go ?
  11. How to Iterate Over an Array in Go ?
  12. How to Iterate Over an Array in Reverse Order in Go ?
  13. How to get the Index of Specified Element in an Array in Go ?
  14. How to check if Specified Element is present in the Array in Go ?
  15. How to count the Number of Occurrences of Specified Element in the Array in Go ?
  16. How to Sort an Array in Go ?
  17. How to Sort an Array in Ascending Order in Go ?
  18. How to Sort an Array in Descending Order in Go ?
  19. How to create a Two Dimensional Array in Go ?
  20. How to Iterate over a Two Dimensional Array in Go ?
  21. How to create a Three Dimensional Array in Go ?
  22. How to Copy an Array in Go ?
  23. How to Split an Array in Go ?
  24. How to Join Arrays in Go ?
  25. How to check if Two Arrays are Equal in Go ?
  26. How to check if Two Arrays have Same Elements (Regardless of Order) in Go ?
  27. How to Convert an Array of Integers to an Array of Strings in Go ?
  28. How to Convert an Array of Strings to an Array of Integers in Go ?
  29. How to Reverse an Array in Go ?
  30. How to Shuffle an Array in Go ?
  31. How to Rotate Elements in an Array in Go ?
  32. How to Filter Elements of an Array based on a Condition in Go ?
  33. How to Declare an Integer Array in Go ?
  34. How to Declare a Float Array in Go ?
  35. How to Declare a String Array in Go ?
  36. How to Remove Duplicates in an Array in Go ?
  37. How to Remove Specific Element from an Array in Go ?
  38. How to Remove Element from Array based on a Condition in Go ?
  39. How to Sort a String Array in Dictionary Order in Go ?
  40. How to Concatenate Strings in Array in Go ?