{"id":2714,"date":"2010-08-24T16:37:36","date_gmt":"2010-08-24T20:37:36","guid":{"rendered":"http:\/\/mjtsai.com\/blog\/?p=2714"},"modified":"2010-08-24T16:37:38","modified_gmt":"2010-08-24T20:37:38","slug":"why-pythons-integer-division-floors","status":"publish","type":"post","link":"https:\/\/mjtsai.com\/blog\/2010\/08\/24\/why-pythons-integer-division-floors\/","title":{"rendered":"Why Python&rsquo;s Integer Division Floors"},"content":{"rendered":"<p><a href=\"http:\/\/python-history.blogspot.com\/2010\/08\/why-pythons-integer-division-floors.html\">Guido van Rossum<\/a>:<\/p>\n<blockquote cite=\"http:\/\/python-history.blogspot.com\/2010\/08\/why-pythons-integer-division-floors.html\"><p>I made the same choice because there are some interesting applications of the modulo operation where the sign of a is uninteresting. Consider taking a POSIX timestamp (seconds since the start of 1970) and turning it into the time of day. Since there are 24*3600 = 86400 seconds in a day, this calculation is simply t % 86400. But if we were to express times before 1970 using negative numbers, the \"truncate towards zero\" rule would give a meaningless result! Using the floor rule it all works out fine.<\/p><\/blockquote>","protected":false},"excerpt":{"rendered":"<p>Guido van Rossum: I made the same choice because there are some interesting applications of the modulo operation where the sign of a is uninteresting. Consider taking a POSIX timestamp (seconds since the start of 1970) and turning it into the time of day. Since there are 24*3600 = 86400 seconds in a day, this [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"apple_news_api_created_at":"","apple_news_api_id":"","apple_news_api_modified_at":"","apple_news_api_revision":"","apple_news_api_share_url":"","apple_news_coverimage":0,"apple_news_coverimage_caption":"","apple_news_is_hidden":false,"apple_news_is_paid":false,"apple_news_is_preview":false,"apple_news_is_sponsored":false,"apple_news_maturity_rating":"","apple_news_metadata":"\"\"","apple_news_pullquote":"","apple_news_pullquote_position":"","apple_news_slug":"","apple_news_sections":"\"\"","apple_news_suppress_video_url":false,"apple_news_use_image_component":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-2714","post","type-post","status-publish","format-standard","hentry","category-programming-category"],"apple_news_notices":[],"_links":{"self":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/2714","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/comments?post=2714"}],"version-history":[{"count":1,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/2714\/revisions"}],"predecessor-version":[{"id":2715,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/2714\/revisions\/2715"}],"wp:attachment":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/media?parent=2714"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/categories?post=2714"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/tags?post=2714"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}