Things to improve: 1. You may only guess the word once, any input of more than 1 character will be treated as an attempt to guess the word. 2. There is no input validation, invalid input is treated as a guess 3. This doesn't track guesses you've already made

Hangman

#!/usr/bin/env ruby

word_bank = ["this", "is", "the", "word", "bank"]
word = word_bank.sample
remaining_guesses = 10
guess = ""
display = "_" * word.length 

until guess == word || remaining_guesses == 0 || display == word
	puts "Word : #{display}"
	puts "Chances remaining: #{remaining_guesses}"
	print "Guess a single letter (a-z) or the entire word: "
	
	guess = gets.chomp

	if guess.length == 1
		if word.include?(guess)			
			index = 0
			match = []
			occurences = word.scan(/#{guess}/).length			
			for i in 0...occurences do
				match << word.index(guess, index)
				index = match[i]+1
			end
			for i in 0...match.length
				display[match[i]] = word[match[i]]
			end
			puts "#{occurences} occurences of #{guess} found"
		else
			puts "Sorry, no #{guess}'s found"
			remaining_guesses -= 1
		end
	else #guess is a word
		if guess == word
			display = word
		else 
			puts "Sorry, that's not the word"
			remaining_guesses == 1
		end
	end
end

puts "Congratulations, you won!" if display == word