title: What does this ($ln=~/.*[A-Z]1.*\t/) || ($ln=~/.*[A-Z]\]1.*\t/) || ($ln=~/.*[A-Z]\@\]1.*\t/) mean in a perl script?
body: <p>Being a newbie in perl, I've tried searching what each character in the code signifies but for this particular line in the code. It was the condition in an If statement. Kindly help me out with this. Thanks :)</p>
  
  <pre><code>if(
      ( $ln =~ /.*[A-Z]1.*\t/     ) || 
      ( $ln =~ /.*[A-Z]\]1.*\t/   ) || 
      ( $ln =~ /.*[A-Z]\@\]1.*\t/ )   )
  </code></pre>