adds a value to a string-slice after a specific position

insert-in-slice.go

package main

import (
	"fmt"
)

func main() {
	var a,b []string
	a = []string{"a","b","d","e"}
	
	fmt.Println("a (before):")
	fmt.Println(a)
	fmt.Println()
	
	
	b = insertSliceAfter(a, "c", 2)
	
	fmt.Println("a (after):")
	fmt.Println(a)
	fmt.Println()
	fmt.Println("b:")
	fmt.Println(b)
}


func insertSliceAfter(slice []string, value string, pos int) []string {
	s := make([]string, len(slice))
	copy(s, slice)
	s = append(s, "")
	copy(s[pos+2:], s[pos+1:])
	s[pos+1] = value
	return s
}