{"id":336,"date":"2022-08-30T14:59:39","date_gmt":"2022-08-30T14:59:39","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2013\/11\/06\/problem-about-feature-detection-collection-of-common-programming-errors\/"},"modified":"2022-08-30T14:59:39","modified_gmt":"2022-08-30T14:59:39","slug":"problem-about-feature-detection-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2022\/08\/30\/problem-about-feature-detection-collection-of-common-programming-errors\/","title":{"rendered":"problem about feature-detection-Collection of common programming errors"},"content":{"rendered":"<ul>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/e18708feac815c9ae10a7cfb39264e89?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nAndroo<br \/>\nc++ opencv feature-detection<br \/>\nI am using VS 2008 with OpenCV 2.1 installed as per the installation guide. FeatureDetector\/SurfFeatureDetector are<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/b6116ac3c4b5835c6745570ea73a85c1?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nCharles<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/52e65a3c802ae662b6c0e0989a7c4425?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\ngnarf<br \/>\njavascript jquery browser-detection feature-detection<br \/>\nIn earlier versions, I used to test if I should be triggering popstate manually on page load, because Chrome triggers it right after load, and Firefox and IE do not.if ($.browser.mozilla || $.browser.msie) {$(window).trigger(&#8216;popstate&#8217;);<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/a4869b5e392c55ae06e07d15303a771c?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nsdleihssirhc<br \/>\njavascript javascript-events feature-detection focusin<br \/>\nThanks to Perfection kills, we can use the following JavaScript to detect event support:function hasEvent(ev) {var elem = document.createElement(&#8216;a&#8217;),type = &#8216;on&#8217; + ev,supported = elem[type] !== undefined;if (!supported) {elem.setAttribute(type, &#8216;return;&#8217;);supported = typeof elem[type] === &#8216;function&#8217;;}elem = null;return supported; }This works for about the<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/d9c8aa0295aeb996aa89843ce513643d?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nKnu<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/xpQI8.jpg?s=32&amp;g=1\" \/><br \/>\nMichael Mullany<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/f27fdd1d626716a346b67536f9fc8e53?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nKeith<br \/>\njavascript cross-browser ecmascript-5 feature-detection<br \/>\nIn Javascript you can delete an object property:var o = { x: 1, y: 2 };var wasDeleted = delete o.x;Now o.x should be undefined and wasDeleted is true.However you can only delete native objects, and unfortunately the browse<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/98652271ca2bb9120e3bf5cdc1e2cd9c?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\ncallum<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/25f159e32f8409db5ed15cd1be3aaeef?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\njayarjo<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/i.stack.imgur.com\/3v2xo.jpg?s=32&amp;g=1\" \/><br \/>\nkarim79<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/8095efdc89f4a70029477fcb58cddd06?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nRafael Adel<\/li>\n<\/ul>\n<p id=\"rop\"><small>Originally posted 2013-11-06 03:09:29. <\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>Androo c++ opencv feature-detection I am using VS 2008 with OpenCV 2.1 installed as per the installation guide. FeatureDetector\/SurfFeatureDetector are Charles gnarf javascript jquery browser-detection feature-detection In earlier versions, I used to test if I should be triggering popstate manually on page load, because Chrome triggers it right after load, and Firefox and IE do [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-336","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/336","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=336"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/336\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=336"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=336"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=336"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}