Ask HN: Sorry, that story was previously submitted

[jonbaer]

Is it really that hard to give a link to the sorry if it was submitted?

[brudgers]

The search box at the bottom of the page will often turn up one to many results.

If I had to guess at the implementation of the duplicate detector, it might be a bloom filter or a hash (or both in layered combination) for speed and space efficiency. If true, this separates 'yes it is a duplicate' from 'what is it a duplicate of'.

[BuuQu9hu]

That usually means the link was banned, since the default for when you submit a duplicate link is to redirect you to the discussion for that link.

[grzm → BuuQu9hu]

Or you yourself submitted, deleted, and attempted to resubmit. (Personal experience.)