list.tt2

[% # This is a TT comment.  The '-' at the end "chomps" the newline.  You won't -%]
[% # see this "chomping" in your browser because HTML ignores blank lines, but  -%]
[% # it WILL eliminate a blank line if you view the HTML source.  It's purely   -%]
[%- # optional, but both the beginning and the ending TT tags support chomping. -%]

[% # Provide a title -%]
[% META title = 'Book List' -%]

<table>
<tr><th>Title</th><th>Rating</th><th>Author(s)</th></tr>
[% # Display each book in a table row %]
[% FOREACH book IN books -%]
  <tr>
    <td>[% book.title %]</td>
    <td>[% book.rating %]</td>
    <td>
      [% # NOTE: See Chapter 4 for a better way to do this!                      -%]
      [% # First initialize a TT variable to hold a list.  Then use a TT FOREACH -%]
      [% # loop in 'side effect notation' to load just the last names of the     -%]
      [% # authors into the list. Note that the 'push' TT vmethod doesn't return -%]
      [% # a value, so nothing will be printed here.  But, if you have something -%]
      [% # in TT that does return a value and you don't want it printed, you     -%]
      [% # 1) assign it to a bogus value, or                                     -%]
      [% # 2) use the CALL keyword to call it and discard the return value.      -%]
      [% tt_authors = [ ];
         tt_authors.push(author.last_name) FOREACH author = book.authors %]
      [% # Now use a TT 'virtual method' to display the author count in parens   -%]
      [% # Note the use of the TT filter "| html" to escape dangerous characters -%]
      ([% tt_authors.size | html %])
      [% # Use another TT vmethod to join & print the names & comma separators   -%]
      [% tt_authors.join(', ') | html %]
    </td>
  </tr>
[% END -%]
</table>