nearby-AZ created by barbchoy - https://repl.it/Br7R/3300

nearby-AZ.rb

# Write a method that takes a string in and returns true if the letter
# "z" appears within three letters **after** an "a". You may assume
# that the string contains only lowercase letters.
#
# Difficulty: medium.

def nearby_az(string)
  i=0
  a_pos=0
  while i<string.length
    if string[i]=="a"
      a_pos=i
      if string[a_pos+1]=="z"||string[a_pos+2]=="z"||string[a_pos+3]=="z"
      return true
      end
    end
    
  i+=1
  end
  return false
end

# These are tests to check that your code is working. After writing
# your solution, they should all print true.

puts("\nTests for #nearby_az")
puts("===============================================")
    puts('nearby_az("baz") == true: ' + (nearby_az('baz') == true).to_s)
    puts('nearby_az("abz") == true: ' + (nearby_az('abz') == true).to_s)
    puts('nearby_az("abcz") == true: ' + (nearby_az('abcz') == true).to_s)
    puts('nearby_az("a") == false: ' + (nearby_az('a') == false).to_s)
    puts('nearby_az("z") == false: ' + (nearby_az('z') == false).to_s)
    puts('nearby_az("za") == false: ' + (nearby_az('za') == false).to_s)
puts("===============================================")