Golang React JS Technology Blog

Golang program for implementation of Selection Sort

This sorting algorithm begins by finding the smallest element in an array and interchanging it with data at, for instance, array index [0]. Starting at index 0, we search for the smallest item in the list that exists between index 1 and the index of the last element. When this element has been found, it is exchanged with the data found at index 0. We simply repeat this process until the list becomes sorted.

Example

package main

import (
	"fmt"
	"math/rand"
	"time"
)

func main() {

	slice := generateSlice(20)
	fmt.Println("\n--- Unsorted --- \n\n", slice)
	selectionsort(slice)
	fmt.Println("\n--- Sorted ---\n\n", slice, "\n")
}

// Generates a slice of size, size filled with random numbers
func generateSlice(size int) []int {

	slice := make([]int, size, size)
	rand.Seed(time.Now().UnixNano())
	for i := 0; i < size; i++ {
		slice[i] = rand.Intn(999) - rand.Intn(999)
	}
	return slice
}
 
func selectionsort(items []int) {
    var n = len(items)
    for i := 0; i < n; i++ {
        var minIdx = i
        for j := i; j < n; j++ {
            if items[j] < items[minIdx] {
                minIdx = j
            }
        }
        items[i], items[minIdx] = items[minIdx], items[i]
    }
}

Output

--- Unsorted ---

 [-683 81 -167 555 -651 -234 -251 470 280 -237 297 -188 -707 497 -261 186 411 466 154 -196]

--- Sorted ---

 [-707 -683 -651 -261 -251 -237 -234 -196 -188 -167 81 154 186 280 297 411 466 470 497 555]
Most Helpful This Week
Launches 10 Goroutines and each goroutine adding 10 values to a Channel How to add items to Slice using append function in Golang? Find Type of Struct in Go Programming Language Go program to find Forward(A) record of a domain Golang program to implement Binary Tree Golang program for implementation of Floyd–Warshall Algorithm