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README.md

cameltosnakecase

Instructions

Write a function that converts a string from camelCase to snake_case.

  • If the string is empty, return an empty string.
  • If the string is not camelCase, return the string unchanged.
  • If the string is camelCase, return the snake_case version of the string.

For this exercise you need to know that camelCase has two different writing alternatives that will be accepted:

  • lowerCamelCase
  • UpperCamelCase

Rules for writing in camelCase:

  • The word does not end on a capitalized letter (CamelCasE).
  • No two capitalized letters shall follow directly each other (CamelCAse).
  • Numbers or punctuation are not allowed in the word anywhere (camelCase1).

Expected function

func CamelToSnakeCase(s string) string{

}

Usage

Here is a possible program to test your function:

package main

import (
	"fmt"
)

func main() {
	fmt.Println(CamelToSnakeCase("HelloWorld"))
	fmt.Println(CamelToSnakeCase("helloWorld"))
	fmt.Println(CamelToSnakeCase("camelCase"))
	fmt.Println(CamelToSnakeCase("CAMELtoSnackCASE"))
	fmt.Println(CamelToSnakeCase("camelToSnakeCase"))
	fmt.Println(CamelToSnakeCase("hey2"))
}

And its output:

$ go run .
Hello_World
hello_World
camel_Case
CAMELtoSnackCASE
camel_To_Snake_Case
hey2