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All the Perl that's Practical to Extract and Report

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Lisp: An idea whose time has come 2 Comments More | Login | Reply /

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  • Continuations (Score:2)

    by djberg96 (2603) on 2004.07.01 9:04 (#32048) Journal
    ...continuation-based web frameworks

    Continuations are one of the things (among others, I'm told) that Ruby borrowed from Lisp. At least one framework, Borges [rubyforge.org], uses continuations as a way to deal with state.

    Unfortunately, I'm not one of those people smart enough to figure out how I can use continations to my advantage in daily work.

    • Almost every web app spends most of its time just recreating a state that it understands. And the logic of transitions between pages have to be unrolled into a big switch statement up front.

      If perl 7 had continuations, you could do this:

      #!/usr/bin/perl7

      # website that sells t-shirts

      $user = CGI::Continuation.new();

      show_start_page();

      if ($user.t_shirts) {
         show_shirts();  # each shirt has a buy button
         if ($user.show_close_up) {
             show_close_up($user.sh

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