FiNGerTiPS Ruby Banter on Memoization in Rails
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Memoization is a technique for speeding up your code by caching the results of method calls. In this episode Norbert shows a Ruby implementation of memoization and how you can use it.
If you don't have/like/want/whatever the Apple video format, you can watch a Flash version at yoMedia: http://www.yomedia.com/yomedia/87a4b8c026/fngtps__rubybanter_episode__4_on_memoization_in_rails