Insert

func Insert[T any](slice []T, i int, value T) []T

Insert takes a slice of type T, an index and a value of type T, inserting the value at the given index and shifting any existing elements to the right.

package main

import (
    "fmt"

    "github.com/Goldziher/go-utils/sliceutils"
)

func main() {
    numerals := []int{0, 2}

    numerals = sliceutils.Insert(numerals, 1, 1)

    fmt.Print(numerals) // [0, 1, 2]
}