1000万件の高評価がたった1件だけの評価に負けないスコアランキングアルゴリズム（ライブラリ）Leak-Free Recursive Blocks - Jeremy W. Sherman こんな感じ __weak __block block_t recurse; block_t block; recurse = block = ^(id val)...
How to Build a Popularity Algorithm You can be Proud of
Many web sites allow users to casts vote on items. These visitors’ votes are then often used to detect the items’ “popularity” and hence rank the rated items accordingly. And when “rank” comes into play things gets tricky: The system can have inherent deficiencies in ranking items. That is mostly because developers tend to “re-invent the wheel” and throw in their own algorithms instead of basing t
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