{"id":2006,"date":"2009-10-03T13:36:59","date_gmt":"2009-10-03T17:36:59","guid":{"rendered":"http:\/\/mjtsai.com\/blog\/?p=2006"},"modified":"2009-10-03T13:37:02","modified_gmt":"2009-10-03T17:37:02","slug":"care-and-feeding-of-singletons","status":"publish","type":"post","link":"https:\/\/mjtsai.com\/blog\/2009\/10\/03\/care-and-feeding-of-singletons\/","title":{"rendered":"Care and Feeding of Singletons"},"content":{"rendered":"<p><a href=\"http:\/\/www.mikeash.com\/?page=pyblog\/friday-qa-2009-10-02-care-and-feeding-of-singletons.html\">Mike Ash<\/a>:<\/p>\n<blockquote cite=\"http:\/\/www.mikeash.com\/?page=pyblog\/friday-qa-2009-10-02-care-and-feeding-of-singletons.html\"><p>Programmer safety is, in my opinion, counterproductive. Apple&rsquo;s approach, of building a singleton which can&rsquo;t be destroyed by accident and which intercepts attempts to allocate a second instance, covers up errors rather than fixing them. It&rsquo;s much better to trap and eliminate the bad code rather than render it harmless. For example, instead of overriding <code>release<\/code> to do nothing, override <code>dealloc<\/code> to log an error and abort the program.<\/p><\/blockquote>\n<p>Fail fast!<\/p>","protected":false},"excerpt":{"rendered":"<p>Mike Ash: Programmer safety is, in my opinion, counterproductive. Apple&rsquo;s approach, of building a singleton which can&rsquo;t be destroyed by accident and which intercepts attempts to allocate a second instance, covers up errors rather than fixing them. It&rsquo;s much better to trap and eliminate the bad code rather than render it harmless. For example, instead [&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-2006","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\/2006","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=2006"}],"version-history":[{"count":1,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/2006\/revisions"}],"predecessor-version":[{"id":2007,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/2006\/revisions\/2007"}],"wp:attachment":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/media?parent=2006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/categories?post=2006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/tags?post=2006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}