5 ms·

Dup: http://news.ycombinator.com/item?id=1626305 http://news.ycombinator.com/item?id=1626305 Many, many, many comments there.

hartror 16y ago
Less than a year old. HN really needs to alert you to dupes when you submit . . or does it? I know it doesn't allow you to post a dupe for a cool off period after it has been posted . . .
- jonknee 16y ago
  There is a dupe checker, but only for exact matches (which if there is one instead of getting a warning it automatically lodges an upvote of that link on your behalf). The OP of this thread appended a # to the end of the URL to bypass the filter.
  - nikcub 16y ago
    then HN needs to implement URL normalization and equivalence from RFC3986. These are fresh in my mind because I extended urllib in Python to support them last week. It isn't an easy problem to solve, working out if two URLs are equivalent, but the RFC goes some way to solving it which picks up easy things like adding a #. see: http://tools.ietf.org/html/rfc3986#section-6 http://tools.ietf.org/html/rfc3986#section-6
    - steve-howard 16y ago
      Thanks to hashbangs (or really just the prevalence of Ajax-only sites), it's now a lot harder to tell whether two pages with #something in the URL are effectively the same.
    - cma 16y ago
      Sometimes the content on a page has changed, but still has the same URL; submitting it again isn't a dupe.
      - RiderOfGiraffes 16y ago
        In those cases the item should be flagged - any discussion is potentially no longer relevant because it's about an earlier version.
  - scott_s 16y ago
    There's also a semantic dupe checker called RiderOfGiraffes. (Seriously, and with all due gratitude.)
    - RiderOfGiraffes 16y ago
      Thank you, although not everyone agrees. Although sometimes they then get re-upvoted, many of the duplication notifications get downvotes. Here are two recent ones: http://news.ycombinator.com/item?id=2392849 http://news.ycombinator.com/item?id=2392849 http://news.ycombinator.com/item?id=2392739 http://news.ycombinator.com/item?id=2392739
      - scott_s 16y ago
        That's baffling to me, because I almost always click-through on the previous discussions. Maintaining discussion history adds value to the community.
- duck 16y ago
  No cool off period (although that is a good idea). I just submitted a good read and it head already been posted 616 days ago, and thus no one will see it.

hartror 16y ago

Less than a year old. HN really needs to alert you to dupes when you submit . . or does it? I know it doesn't allow you to post a dupe for a cool off period after it has been posted . . .

jonknee 16y ago
There is a dupe checker, but only for exact matches (which if there is one instead of getting a warning it automatically lodges an upvote of that link on your behalf). The OP of this thread appended a # to the end of the URL to bypass the filter.
- nikcub 16y ago
  then HN needs to implement URL normalization and equivalence from RFC3986. These are fresh in my mind because I extended urllib in Python to support them last week. It isn't an easy problem to solve, working out if two URLs are equivalent, but the RFC goes some way to solving it which picks up easy things like adding a #. see: http://tools.ietf.org/html/rfc3986#section-6 http://tools.ietf.org/html/rfc3986#section-6
  - steve-howard 16y ago
    Thanks to hashbangs (or really just the prevalence of Ajax-only sites), it's now a lot harder to tell whether two pages with #something in the URL are effectively the same.
  - cma 16y ago
    Sometimes the content on a page has changed, but still has the same URL; submitting it again isn't a dupe.
    - RiderOfGiraffes 16y ago
      In those cases the item should be flagged - any discussion is potentially no longer relevant because it's about an earlier version.
- scott_s 16y ago
  There's also a semantic dupe checker called RiderOfGiraffes. (Seriously, and with all due gratitude.)
  - RiderOfGiraffes 16y ago
    Thank you, although not everyone agrees. Although sometimes they then get re-upvoted, many of the duplication notifications get downvotes. Here are two recent ones: http://news.ycombinator.com/item?id=2392849 http://news.ycombinator.com/item?id=2392849 http://news.ycombinator.com/item?id=2392739 http://news.ycombinator.com/item?id=2392739
    - scott_s 16y ago
      That's baffling to me, because I almost always click-through on the previous discussions. Maintaining discussion history adds value to the community.
duck 16y ago
No cool off period (although that is a good idea). I just submitted a good read and it head already been posted 616 days ago, and thus no one will see it.