title: Ruby hexacode to unicode conversion
body: <p>I crawled a website which contains unicode, an the results look something like, if in code </p>
  
  <p>a = "\\u2665  \\uc624 \\ube60! \\uc8fd \\uae30 \\uc804 \\uc5d0"</p>
  
  <p>May I know how do I do it in Ruby to convert it back to the original Unicode text which is in UTF-8 format?</p>