Insert Value at Index

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Insert Value at Index in Go
by yhuang Go fmt fmt.Println 
package main

import (
	"fmt"
)

func main() {
	s := []int{1, 2, 3, 4, 5}

	insertAtIdx := 2
	s = append(s[:insertAtIdx], append([]int{999}, s[insertAtIdx:]...)...)
	fmt.Println(s)
}

Last Run  :
[1 2 999 3 4 5]