You may have noticed how some websites let you know how many times URLs have been tweeted. How do they do that? The twitter api will help.

The the call we need is:

http://urls.api.twitter.com/1/urls/count.json

This call takes a url as a parameter. Let’s look at an example:

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Sites in various parts of the world, for example the UK, need to display information to visitors about their use of cookies. This is typically done with a cookie information page and a notice which appears on a user’s first visit to the site.

Many sites store the fact that a user has seen t...