Nested for loop to iterate through struct containing array elements is not working in golang

Trying to iterate through item list but getting below error :

./prog.go:25:39: invalid operation: checkItems[i] (type struct { items string; size []string; color []string } does not support indexing)
./prog.go:28:69: invalid operation: checkItems[i] (type struct { items string; size []string; color []string } does not support indexing)

Here is the code :
https://play.golang.org/p/zdCe-BC2t_D

In this line for i, checkItems := range checkItems, you redefine checkItems which overwrite the original checkItems, so now checkItems only indicates one item of original checkItems whose type should be struct, not the list any more.

The solution is rename the second checkItems into another one like checkItem

package main

import (
	"fmt"
)

func main() {
	checkItems := []struct {
		items string
		size  []string
		color []string
	}{
		{
			items: "Shirt",
			size:  []string{"XL", "L", "S", "XS"},
			color: []string{"Brown", "Black", "White"},
		},
		{
			items: "Shoes",
			size:  []string{"10", "8"},
			color: []string{"White", "Brown"},
		},
	}
	for i, checkItem := range checkItems {
		for j, _ := range checkItem.size {

			fmt.Println("Hello, playground", i, "checkitems", checkItem)
			fmt.Println("Hello, playground", j, "checkitems size", checkItems[i].size[j])
		}

	}
}