Vjeux » Javascript: Cyclic Object Detection
URLON.stringify() suffer from a problem, when passed an object that contains a cycle, it will never stop. This article shows 3 techniques in order to detect if an object is cyclical. Edit the object: Mark In order to detect a cycle in an object, the method we learn at school is to mark each visited node. When doing a traversal, if we encounter an already marked node, then it is cyclic. This method
How ECMAScript 5 still does not allow to subclass array — Perfection Kills
Why subclass an array? Naive approach Problems with naive approach Special nature of arrays Function objects and [[Construct]] The importance of array special behavior Existing solutions ECMAScript 5 accessors to the rescue [[Class]] limitations Does [[Class]] matter? Wrappers. Direct property injection. Wrappers. Prototype chain injection. Summary Subclassing an array in Javascript has never been
N個ã®é…åˆ—ç”Ÿæˆ - hogehoge @teramako
Array(10).map(function(e,i) i) ã¨ã‚„ã£ã¦[0,1,2,3,4,5,6,7,8,9]ã¨ãªã‚‹ã“ã¨ã‚’想定ã—ã¦ã„ãŸã‚“ã ã‘ã©ã€ãªã‚‰ãªãã¦è‹¦ã—ã‚“ã§ã„ãŸã‚‰ã€id:nanto_viã•ã‚“ãŒæ•™ãˆã¦ãã‚ŒãŸã€‚ http://twitter.com/nanto_vi/status/5014927085 Array.apply(null, Array(10)).map(function(e,i) i) ãªã‚‹ã»ã©ã€‚ã¨ã—ã‹è¨€ã„よã†ãŒç„¡ã„。
packerã§åœ§ç¸®ã•ã‚ŒãŸJavaScriptã®debug方法 - monjudoh’s diary
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programming notes. mainly about JavaScript / jQuery. [@Takazudo] [takazudo@gmail.com] Hint: alt + / jQueryã®opacityアニメã¨IE6,7,8 - Takazudo hamalogã§ã‚‚昔書ã„ãŸã®ã ã‘ã©ã‚‚ã€IE8以下ã§ã¯opacityã«å¯¾å¿œã—ã¦ã„ãªã„ã®ã§ã€jQueryã§ã‚¢ãƒ‹ãƒ¡ãƒ¼ã‚·ãƒ§ãƒ³ã—よã†ã¨ã™ã‚‹ã¨ã€è‰²ã€…ãªã“ã¨ãŒé¢å€’。ãã“ã§ã€ã°ã£ã•ã‚ŠIE8以下対応をã•ã£ã•ã¨ã‚„ã‚‹ã®ãŒä»¥ä¸‹ã€‚ã©ã†ã®ã“ã†ã®ã§ãƒ–ラウザ判別ã§ã‚‚ã—㦠if (ieLessThan9){ jQuery.fx.off = true; }jQuery.fx.off = true ã«ã™ã‚Œã°ã€ã™ã¹ã¦ã®ã‚¢ãƒ‹ãƒ¡ãƒ¼ã‚·ãƒ§ãƒ³ãŒä¸€çž¬ã§çµ‚ã‚るよã†ã«ãªã‚Šã¾ã™ã€‚ã“ã‚Œã§fadeã—ãŸæ™‚ã§ã‚‚一瞬ã§å¤‰ã‚ã‚‹ã‹ã‚‰å•é¡Œãªã—ã ãœã‚¤ã‚§ã‚¤ã£ã¦ãー。 ※ã“ã‚Œã¯ã‹ãªã‚ŠUIã«é–¢ã™ã‚‹JS
Firebug Tip: Modify variable value at runtime | Software is hard
Published:March 3rd, 2012 Comments:3 Comments Category:Firebug, Firebug Tip This powerful Firebug's feature, which you can download from the internet, could be also called Edit value and continue (to use similar terminology from Visual Studio). Even if Firefox (and so Firebug) doesn't allow to edit the code itself at run-time, being able to change value of a variable while sitting at a breakpoint
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uncurryThis 関数 - hogehoge @teramako
http://wiki.ecmascript.org/doku.php?id=conventions:safe_meta_programming ã«ã¦å¤§å¤‰æœ‰ç”¨ãªæ›¸ã方を身ã«ç€ã‘ãŸã€‚ Function.prototype.bindã¨Function.prototype.callã®é»’é”è¡“çš„ãªã‚‚ã®ã€‚ obj.hasOwnProperty("prop"); ã¨æ›¸ãã¨ã“ã‚ã‚’callã§æ›¸ã㨠var func = Object.prototype.hasOwnProperty; func.call(obj, "prop"); ã¨æ›¸ã‘る。ã•ã‚‰ã«callã‚’bindã—ã¦ã¿ã‚‹ã¨ var func2 = func.call.bind(func); func2(obj, "prop"); ã¨ãªã‚‹ã€‚ã•ã‚‰ã«ã€bindã‚’bindã™ã‚‹ã¨ var func3 = func.bind.bind(func.call)(func
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programming notes. mainly about JavaScript / jQuery. [@Takazudo] [takazudo@gmail.com] Hint: alt + / ãƒãƒã£ã¦ã‚‚ã†ãŸãƒ¼é–‹ç™ºãƒ¡ãƒ¢ã€‚ UIã ã‘JSã§ã„ã˜ã£ã¦ã‚‹æ™‚ã¯ãã“ã¾ã§æ…Žé‡ã«ãªã‚‹ã“ã¨ã§ã‚‚ãªã„ã‘ã©ã‚‚ã€é »ç¹ã«ã‚¬ã‚·ã‚¬ã‚·ajaxã™ã‚‹å ´åˆã¯ã€æ—¢ã«èµ°ã£ã¦ã„ã‚‹ajaxリクエストもã†ã¾ã„ã“ã¨ãƒãƒ³ãƒ‰ãƒªãƒ³ã‚°ã™ã¹ã。ãƒãƒã£ã¦ã‚‚ã†ãŸãƒ¼ã§ã¯ã€ãƒ„イートをJSONã§è¿”ã™ã‚ˆã†ã€ã‚µãƒ¼ãƒãƒ¼ã‚µã‚¤ãƒ‰ã§ã‚µãƒ¼ãƒ“スを用æ„ã—ã¦ã„ã‚‹ã‚ã‘ã ã‘ã‚Œã©ã‚‚ã€ã¾ãã€æ™®é€šã«è€ƒãˆã‚Œã°ã€ã“ã‚“ãªæ„Ÿã˜ã§ã€JSONè¿”ã£ã¦ããŸã‚‰UIã‚’æ›´æ–°ã™ã‚‹ã£ã¦ã‚„ã‚‹ã‚“ã˜ã‚ƒãªã„ã ã‚ーã‹ã€‚ $.ajax(url, query).then(function(){ // UIæ›´æ–°ã—ã¡ã‚ƒã† }, function(){ alert('ゴメンãªã‚“ã‹å¤‰'); });ã—ã‹ã—ã€ã“ã‚Œã«ã¯å•é¡ŒãŒã‚ã£ã¦ã€JS
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続・IEã§ã®aè¦ç´ ã®å„属性ã«ã¤ã„㦠- monjudoh’s diary
å‰ç½®ã IEã§ã®aè¦ç´ ã®å„属性ã«ã¤ã„㦠- æ–‡æ®Šå ‚ã®ç¶šã。 IE 6,7 ã§ç›¸å¯¾URL -> 絶対 URL ã®å¤‰æ› - #生å˜æˆ¦ç•¥ ã€ãれ㯠- subtechã‚’å‚考ã«ã—ã¦ã€ cloneNodeãƒãƒƒã‚¯ã¨link.hrefã«ã‚ˆã‚‹URLã®çµ¶å¯¾URL化を組ã¿åˆã‚ã›ã¦ã¿ã¾ã—ãŸã€‚ http://jsdo.it/monjudoh/o2Mk http://jsdo.it/monjudoh/9aHd link.hrefã«ã‚ˆã‚‹URLã®çµ¶å¯¾URL化ã¯IE6,7ã§ã¯ä½¿ãˆãªã„ã®ã§å‰²æ„›ã€‚ 検証 IE6 ãªãœã‹hostnameãŒiframeã§ã¯ãªã外å´ã®ã‚‚ã®ã«ãªã£ã¦ã—ã¾ã£ã¦ã„る。 å°‘ãªãã¨ã‚‚çŸã„URLã«ã¤ã„ã¦ã¯outerHTMLãƒãƒƒã‚¯ã‚’使ã£ãŸå ´åˆã«å„属性ã®å€¤ã‚’ã¡ã‚ƒã‚“ã¨å–ã‚Œã¦ã„ãŸã®ã§ã€ ãã£ã¡ã‚’使ã£ãŸã»ã†ãŒè‰¯ã•ãã†ã€‚ aè¦ç´ ã®å„属性(cloneNodeãƒãƒƒã‚¯) ---url.length:11 href:[htt
IEã§ã®aè¦ç´ ã®å„属性ã«ã¤ã„㦠- monjudoh’s diary
色々ã‚ã£ã¦aè¦ç´ ã§URLをパースã™ã‚‹ã¨ã„ã†ã‚³ãƒ¼ãƒ‰ã‚’書ã„ã¦ã„ã¦è‰²ã€…ã¯ã¾ã£ãŸã®ã§ã¾ã¨ã‚ã¾ã™ã€‚ IE6-8ã§ã®a.hrefã®ä¸Šé™ IE6,7:4096bytes IE8:4121bytes ã§ã—ãŸã€‚ ãªãŠã€Firefox,Google Chrome,Safariã¯1MBã¨ã‹æ™®é€šã«æ‰±ãˆã¾ã™ã€‚ 使ã‚ãªã„ã‘ã©ã€‚ http://jsdo.it/monjudoh/8Fm6/read å„属性ã®å–å¾—çŠ¶æ³ a.hrefã«URLを代入ã—ã¦å„属性ãŒã©ã†ãªã‚‹ã‹èª¿ã¹ã¦ã¿ã¾ã—ãŸã€‚ URLã®é•·ã•ãŒçŸã„⇔上é™è¶…㈠outerHTMLãƒãƒƒã‚¯ã‚’使ã‚ãªã„⇔使ㆠa.hrefã«URLを代入後ã€åˆ¥ã®è¦ç´ ã®innerHTMLã«a.outerHTMLを代入ã—ã€ãã®firstChild(aè¦ç´ )ã®å„属性を見るã“㨠ã®äºŒè»¸ã‚’変ãˆã¦èª¿ã¹ã¦ã¿ã¾ã—ãŸã€‚ http://jsdo.it/monjudoh/sc82 IE6 a.hrefã¸ã®ä»£å…¥ã§æ›´æ–°ã•ã‚Œ
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jsã®ã‚ªãƒ¬ã‚ªãƒ¬æ¼”ç®—åã¨ã„ãˆã°ã€ Boolean値ã«å¤‰æ›ã™ã‚‹ !!arg 0åˆã¯1ã«å¤‰æ›ã™ã‚‹ +!!arg å°æ•°ç‚¹ã‚’切りè½ã¨ã™ arg|0 ã‚„ arg >> 0 ãªã©ãŒã‚ã‚Šã¾ã™ãŒã€è‹¥å¹²åˆ†ã‹ã‚Šã¥ã‚‰ã„ã®ã§ã€åˆå¿ƒè€…ã®æ–¹ã«ã¯ãŠã™ã™ã‚ã§ãã¾ã›ã‚“。 http://jsdo.it/uupaa/9YFT ã§å®Ÿè¡Œã§ãã¾ã™ã€‚ uu.ready(function(uu, doc) { var arg = 1.23; uu.log(" !!arg = @", !!arg); uu.log("+!!arg = @", +!!arg); uu.log(" arg|0 = @", arg|0); uu.log("arg>>0 = @", arg>>0); });
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最近Titaniumを使ã„始ã‚ãŸã‚“ã ã‘ã©ã€ã‚³ãƒ¼ãƒ‰è£œå®Œã™ã‚‹ãŸã‚ã®*.jsãŒã©ã“ã«ã‚ã‚‹ã®ã‹ã‚ˆãã‚ã‹ã‚‰ãªã‹ã£ãŸã€‚ã„ã‚ã„ã‚調ã¹ã¦ã„ã‚‹ã¨ã€ http://developer.appcelerator.com/apidoc/mobile/1.4/api.jsonã§å…¬å¼ã®Titanium.*ã®å®šç¾©æƒ…å ±ãŒé…布ã•ã‚Œã¦ã„ã‚‹ 上記ã®api.jsonã‚’èªã‚“ã§JavaScriptã®å®šç¾©ãƒ•ã‚¡ã‚¤ãƒ«ã‚’出力ã—ã¦ãれるモジュール(JavaScript)ãŒhttps://github.com/netpro2k/TiAutocompleteã§é…布ã•ã‚Œã¦ã„ã‚‹ ã¨ã„ã†äº‹ãŒã‚ã‹ã£ãŸã€‚自分ã®å ´åˆã¯ä»¥ä¸‹ã®ã‚ˆã†ã«ã—ã¾ã—ãŸã€‚ $ git clone git://github.com/appcelerator/titanium_mobile.git $ wget http://developer.appcelerator.com/apidoc/
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