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Now that you’re more familiar with the structures that Redis offers, it’s time to use Redis on a real problem. In recent years, a growing number of sites have offered the ability to vote on web page links, articles, or questions, including sites such as reddit and Stack Overflow, as shown in figures 1.6 and 1.7. By taking into consideration the votes that were cast, posts are ranked and displayed based on a score relating those votes and when the link was submitted. In this section, we’ll build a Redis-based back end for a simple version of this kind of site.
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