module StrHelpersDave

# File lib/str_helpers_dave.rb, line 10
def self.casify(str)
  to_case = [:upcase, :downcase]
  arr = str.split('')
  arr.each_with_index do |letter, i|
    this_case = to_case.sample
    arr[i] = letter.send(this_case)
  end

  arr.join('')
end

# File lib/str_helpers_dave.rb, line 6
def self.reversify(str)
  str.split('').reverse.join('')
end

# File lib/str_helpers_dave.rb, line 21
def self.spacify(str, spaces = 0)
  new_string = str
  spaces.times do
    new_string = new_string.split('').join(' ')
  end

  new_string
end