public/subjects/wordflip

wordflip

Instructions

Write a function WordFlip() that receives a string and returns it with the first and last words flipped.

• Prints the Output followed by newline \n.
• If the string is empty, return Invalid Output.
• Ignore spaces if it's more then onr space in between words and all spaces in the edge of the words or sentences.

Expected function

func WordFlip(str string) string {

}

Usage

Here is a possible program to test your function:

package main

import "fmt"

func main() {
  fmt.Print(WordFlip("First second last"))
  fmt.Print(WordFlip(""))
  fmt.Print(WordFlip("     "))
  fmt.Print(WordFlip(" hello  all  of  you! "))
}

And its output:

$ go run . | cat -e
last second First$
Invalid Output$
$
you! of all hello$