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is it possible to normalize a rss feed to remove duplicate links?

Posted on 2013-12-16
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Last Modified: 2014-01-11
I have a rss feed from twitter list.

This often has duplicates - tweets that have the same link

How can I remove the tweets from the rss that have the dupes?
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Question by:finnstone
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6 Comments
 
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Expert Comment

by:Scott Fell, EE MVE
ID: 39723175
I don't know perl but I think I would do this client side anyway.  Create an array of links.  For each post, first find the links and see if they are in the current array.   If not, add the link to the array.  If the link is in the array, then don't use it.  If there are not that many tweets you are checking, there may be no difference client/serverside.
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Author Comment

by:finnstone
ID: 39723195
does not have to be perl, i didnt know where to post this
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Expert Comment

by:Scott Fell, EE MVE
ID: 39723213
What language do you work in?  I'm sure there will be multiple ways to do this in any language.  

You would want to look at a post, then find each string starting, "<a " and ending in "</a>".  Then from the complete string <a href="http://mypage.com/link">Link</a> take just the mypage.com/link and add that to your array.

Then for each post look for a link, if the, "mypage.com/link" matches what is in the array, then do not use the link or post.  

I think you will find this harder though because the same link may be shortened with different url shorteners. If that is not a problem, this should work.
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Author Comment

by:finnstone
ID: 39723216
I do not. I am  going to hire someone and am budget insensitive.
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Author Comment

by:finnstone
ID: 39723217
Yes, but I think there is a system that could return true URL
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Scott Fell,  EE MVE earned 500 total points
ID: 39723228
>Yes, but I think there is a system that could return true URL
There are going to be multiple ways to do this in any given language.  No matter what it will include some sort of search for a string with given parameters.

How you end up using it and displaying and how many tweets you will end up checking will help determine the best solution.

If you want to see the least amount of code, you would use regex.  But even regex may be slightly different from language to language.
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