Codefor/geohash
http://en.wikipedia.org/wiki/Geohash
Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes
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http://en.wikipedia.org/wiki/Geohash
golang online compiler
simpleevent,A event library extracted from Redis(http://redis.io).
http://doubandiantai.sinaapp.com/