Edit requests of 疎行列同士のcos類似度計算では、0以外の要素集合に変換すると超速いことに気付いた(Ruby)

Please check the preview of this article

We released Markdown parser changes on February 24, 2022. There may be some unexpected appearance changes in this update, because this article was posted before the changes.
Please don't forget to check the preview before updating your article.
For more information on the changes, please read this article.