How to return the unique elements of large data structures in go?

I am new to Go language and troubling in the code to find the unique elements in the go.

   var arr [10]string
      arr[0]="table"
      arr[1]="chair"
      arr[2]="table"
      arr[3]="table"
      arr[4]="chair"
      arr[5]="bench"
      arr[6]="table,chair"
      arr[7]="bench,chair"
      arr[8]="chair,table,bench"
      arr[9]="car"

The output should be like:

table 
chair
bench
car

I am really stuck on this. how to get the unique elements from the above array.
The array contains comma seperated values also but i need to print only the unique elements.

Pls someone help me on this.

Thanks for advance.

Idea: use map[string]bool to collect unique elements, use strings.Split to split comma-separated list of words into strings.

Example: http://play.golang.org/p/sBopFGrzbX

package main

import (
    "fmt"
	"strings"
)

func main() {
    arr := [...]string{
		"table",
    	"chair",
	    "table",
		"table",
		"chair",
		"bench",
		"table,chair",
		"bench,chair",
		"chair,table,bench",
		"car",
	}

	m := make(map[string]bool)
	for _, e := range arr {
		for _, w := range strings.Split(e, ",") {
			m[w] = true
		}
	}

	for k, _ := range m {
		fmt.Println(k)
	}
}