gistfile1.jade

.messages
    .message(
      repeat<user> = @userMessages    
      class<active> = @activeUser.id == user.id 
      click = :activate user
     )
      .name {user.message}
      .latest {.text (tail user.messages)}
      .date {friendly message.timestamp}
  
  .active-message
    .message(
      repeat<message> = @activeUser.messages
    ) {message.text}