module StrHelperNb

# File lib/str_helpers_nb.rb, line 8
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_nb.rb, line 4
def self.reversify(str)
  str.split('').reverse.join('')
end

# File lib/str_helpers_nb.rb, line 18
def self.spacify(str, spaces = 0)
  spaces.times do 
    str = str.split('').join(' ')
  end
  str 
end