Vowels

gistfile1.rb

# Write a method that returns whether a given letter is a vowel, using if and elsif

def is_vowel?(v)
  if v == 'a'
    true
  elsif v == 'e'
    true
  elsif v == 'i'
    true
  elsif v == 'o'
    true
  elsif v == 'u'
    true
  else
    false
  end
end
puts "#{is_vowel?('a')}, #{is_vowel?('b')}"

# Write a method that returns whether a given letter is a vowel, using case

def is_vowel?(v)
  case v
  when 'a', 'e', 'i', 'o', 'u'
    true
  else
    false
  end
end
puts "#{is_vowel?('o')}, #{is_vowel?('b')}"

# Write a method that returns whether a given letter is a vowel, using if with no else, all on a # single line

def is_vowel?(v)
  true if 'aeiou'.match(v)
end
puts "#{is_vowel?('a')}, #{is_vowel?('b')}"

# Write a method that returns whether a given letter is a vowel without using if or case while all on # a single line

def is_vowel?(v)
  'aeiou'.include?(v)
end
puts "#{is_vowel?('a')}, #{is_vowel?('b')}"

# Write a method that returns whether a given letter is a vowel without checking equality, or the use # of if, using the array of vowels

def is_vowel?(v)
  %w[a e i o u].include?(v)
end
puts "#{is_vowel?('a')}, #{is_vowel?('b')}"

# Write a method that will evaluate a string and return the first vowel found in the string, if any

def first_vowel(s)
  s.match(/[aeiou]/)
end
s = 'Czech Republic'
puts first_vowel(s)

# Write a method that will evaluate a string and return the ordinal position (index) of the string # where the first vowel is found, if any

def vowelposition(v)
  v.index(/[aeiou]/)
end
puts vowelposition(s)