vowel-check.rb

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

def is_vowel1(letter)
	letter.downcase!
	if letter == "a"
		return true
	elsif letter == "e"
		return true
	elsif letter == "i"
		return true
	elsif letter == "o"
		return true
	elsif letter == "u"
		return true
	else
		return false
	end
end			

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

def is_vowel2(letter)
	letter.downcase!
	case letter
	when "a" then true
	when "e" then true
	when "i" then true
	when "o" then true
	when "u" then true
	else false
	end
end

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

def is_vowel3(letter)
	["a", "e", "i", "o", "u"].each do |vowel| return true if letter == vowel end
end

# 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_vowel4(letter)
	letter == "a" || letter == "e" || letter == "i" || letter == "o" || letter == "u"
end

# 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_vowel5(letter)
	vowels = ["a", "e", "i", "o", "u"]
	vowels.include?(letter)
end

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

def first_vowel(str)
	str.scan(/a|e|i|o|u/).first	
end

# 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 vowel_position(str)
	str.index(str.scan(/a|e|i|o|u/).first)
end

vowel_position("mdfdesfd")