title: Find nearest lower number in string array (ruby)
body: <p>New to ruby. I have an array created by nokogiri like this :</p>
  
  <p>Array = ["10:31 Main title", ...]</p>
  
  <p>It is a schedule in the format hour:minute title.
  Now I have a time, say 10:35 and I want to find the entry in the array with the nearest lower number (time and title). It is like what is playing now?</p>
  
  <p>How can I do this in ruby? I am at a blank here...</p>
  
  <p>Thank you</p>