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l-liroki id:l-liroki

javascriptã«é–¢ã™ã‚‹l-lirokiã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (45)

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JavaScript ã§ parseInt / parseFloat ã‚’ä½¿ã‚ãªã„æ–¹ãŒè‰¯ã„ç†ç”±
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l-liroki 2022/02/11
parseInt

javascript
ãƒªãƒ³ã‚¯
JavaScript ã‚¤ãƒ‡ã‚£ã‚ªãƒ é›†
JavaScriptã§ã¯ã€åˆè¦‹ã®äººã«ã¯ã•ã£ã±ã‚Šã‚ã‹ã‚‰ãªã„ã‘ã‚Œã©ã‚‚ã€ã‚ã‚‹ç¨‹åº¦æ…£ã‚ŒãŸäººã¯å½“ãŸã‚Šå‰ã«ä½¿ã†ã‚¤ãƒ‡ã‚£ã‚ªãƒ ãŒçµæ§‹ãŸãã•ã‚“ã‚ã‚Šã¾ã™ã€‚çŸ¥ã£ã¦ã—ã¾ãˆã°ä½•ã¦ã“ã¨ã¯ãªã„ã®ã§ã€ç§ã®çŸ¥ã£ã¦ã„ã‚‹é™ã‚Šã®ã‚¤ãƒ‡ã‚£ã‚ªãƒ ã¨ãã®æ„å‘³ã‚’è§£èª¬ã—ã¾ã™ã€‚ ï¼ˆ7/3è¿½è¨˜: twitterç‰ã§æ•™ãˆã¦ã„ãŸã ã„ãŸå†…å®¹ã‚’è¿½åŠ ã—ã¾ã—ãŸï¼‰ +v ï¼ˆæ•°å€¤åŒ–ï¼‰ var v = "123"; console.log(+v + 100) // 223 console.log(v + 100) // 123100 vã‚’æ•°å€¤åŒ–ã™ã‚‹æ–¹æ³•ã§ã¯æœ€ã‚‚ãƒ¡ã‚¸ãƒ£ãƒ¼ã§ã™ã€‚parseFloat(v) ã«æ¯”ã¹ã¦é«˜é€Ÿãªã®ã«åŠ ãˆã¦ã€parseFloatã¨ã¯ç´°ã‹ã„æŒ™å‹•ãŒç•°ãªã‚Šã¾ã™ï¼ˆä¾‹ãˆã°ç©ºæ–‡å—åˆ—ã®å ´åˆã€parseFloatãªã‚‰ã° NaN ã«ãªã‚Šã¾ã™ãŒã€ +v ã®å ´åˆã¯ã‚¼ãƒã«ãªã‚Šã¾ã™ï¼‰ã€‚å¿…ãšæ•°å€¤ã«ãªã‚‹ã“ã¨ãŒä¿è¨¼ã•ã‚Œã¦ãŠã‚Šã€æ–‡å—åˆ—ãªã©ã§æ•°å€¤åŒ–å‡ºæ¥ãªã„å ´åˆã¯NaNãŒè¿”ã‚Šã¾ã™ã€‚ v
l-liroki 2022/02/11
javascript
ãƒªãƒ³ã‚¯
TypeScriptå…¥é–€ã€Žã‚µãƒã‚¤ãƒãƒ«TypeScriptã€ã€œå®Ÿå‹™ã§ä½¿ã†ãªã‚‰æœ€ä½Žé™ã“ã“ã ã‘ã¯ãŠã•ãˆã¦ãŠããŸã„ã“ã¨ã€œ
æœ¬æ›¸ã€Žã‚µãƒã‚¤ãƒãƒ«TypeScriptã€ã¯å®Ÿå‹™ã§TypeScriptã‚’ä½¿ã†é–‹ç™ºè€…ã®ãŸã‚ã®å…¥é–€æ›¸ã§ã™ã€‚ãã—ã¦ã€ã“ã®ãƒšãƒ¼ã‚¸ã¯TypeScriptã®ç‰¹å¾´ã‚’æœ€é€Ÿã§æŠŠæ¡ã§ãã‚‹ã‚ˆã†ã€æ•°ç™¾ãƒšãƒ¼ã‚¸ã‹ã‚‰ãªã‚‹æœ¬æ›¸ã®ã‚³ãƒ³ãƒ†ãƒ³ãƒ„ã‚’ã¤ã¾ã¿é£Ÿã„ã—ãŸè¦ç´„ã§ã™ã€‚ Â» æœ¬æ›¸ã«ã¤ã„ã¦è©³ã—ãçŸ¥ã‚‹ Â» ã¨ã«ã‹ãä»Šã™ãTypeScriptã‚’æ›¸ã„ã¦ã¿ãŸã„ TypeScriptã¨ã¯â€‹JavaScriptã®ã‚¹ãƒ¼ãƒ‘ãƒ¼ã‚»ãƒƒãƒˆã¨ãªã‚‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã€‚é™çš„åž‹ä»˜ã‘è¨€èªžã§ã‚ã‚Šã€ãƒ—ãƒã‚°ãƒ©ãƒ ã®æ£ã—ã•ãŒé™çš„ã«æ¤œæŸ»ã§ãã‚‹ã€‚ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚„IDEãªã©ã®é–‹ç™ºç’°å¢ƒãŒå……å®Ÿã—ã¦ãŠã‚Šã€å¤§ããªã‚¨ã‚³ã‚·ã‚¹ãƒ†ãƒ ã‚’æŒã£ã¦ã„ã‚‹ã€‚MicrosoftãŒ2012å¹´ã«é–‹ç™ºã—ã€ã‚ªãƒ¼ãƒ—ãƒ³ã‚½ãƒ¼ã‚¹ã§å…¬é–‹ã—ãŸã€‚Â» TypeScriptã®ç‰¹å¾´ã«ã¤ã„ã¦è©³ã—ãçŸ¥ã‚‹ Â» TypeScriptèª•ç”Ÿã®èƒŒæ™¯ã«ã¤ã„ã¦è©³ã—ãçŸ¥ã‚‹ TypeScriptã¯JavaScriptã®ã‚¹ãƒ¼ãƒ‘ãƒ¼ã‚»ãƒƒãƒˆâ€‹ã‚¹ãƒ¼ãƒ‘ãƒ¼ã‚»ãƒƒãƒˆã¨ã¯ã€å…ƒã®è¨€èªžã¨
l-liroki 2021/11/25
TypeScript

javascript
ãƒªãƒ³ã‚¯
ã‚°ãƒ¼ã‚°ãƒ«ãŒChrome DevToolsã®å¦ç¿’ãƒ“ãƒ‡ã‚ªã‚’å…¬é–‹ã€‚DOMæ“ä½œã‹ã‚‰ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã€ãƒ¡ãƒ¢ãƒªãƒªãƒ¼ã‚¯ã®ç™ºè¦‹ã¾ã§è©³ã—ãå¦ã¹ã‚‹
ã‚°ãƒ¼ã‚°ãƒ«ãŒChrome DevToolsã®å¦ç¿’ãƒ“ãƒ‡ã‚ªã‚’å…¬é–‹ã€‚DOMæ“ä½œã‹ã‚‰ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã€ãƒ¡ãƒ¢ãƒªãƒªãƒ¼ã‚¯ã®ç™ºè¦‹ã¾ã§è©³ã—ãå¦ã¹ã‚‹ å¦ç¿’å†…å®¹ã¯å…¨éƒ¨ã§ä»¥ä¸‹ã®7ã¤ã®ãƒ¬ãƒ™ãƒ«ã«åˆ†ã‹ã‚Œã¦ãŠã‚Šã€17æœ¬ã®ãƒ“ãƒ‡ã‚ªã¨ã€ãƒ¬ãƒ™ãƒ«ã”ã¨ã«ç”¨æ„ã•ã‚ŒãŸã€å®Ÿéš›ã«è‡ªåˆ†ã§æ“ä½œã—ã¦è§£ã„ã¦ã¿ã‚‹75ä»¥ä¸Šã®ä¾‹é¡Œã‹ã‚‰æ§‹æˆã•ã‚Œã¦ã„ã¾ã™ã€‚ãƒ¬ãƒ™ãƒ«ã‚’ã‚¯ãƒªã‚¢ã™ã‚‹ã¨ãƒãƒƒã‚¸ãŒã‚‚ã‚‰ãˆã‚‹ã‚ˆã†ã«ãªã£ã¦ã„ã¾ã™ã€‚ Level 1: Getting Started & Basic DOM and Styles Level 2: Advanced DOM and Styles Level 3: Working With the Console Level 4: Debugging JavaScript Level 5: Improving Network Performance Level 6: Improving Performance Level 7: Memo
l-liroki 2013/03/30
javascript
ãƒªãƒ³ã‚¯
Backbone 1.0
I'm pleased and gratified to announce the oft-promised 1.0 release of Backbone.js. Backbone has come a long way since its initial release as a small extraction of the JavaScript Model/View layer of an open-source web application (funnily enough, exactly 888 days ago). These days, you can find it helping to power web applications large and small, from major news organizations to comment widgets, a
l-liroki 2013/03/22
backbone.js

javascript
ãƒªãƒ³ã‚¯
çˆ†é€Ÿã§ã‚ã‹ã‚‹jQuery.Deferredè¶…å…¥é–€
ãƒ¤ãƒ•ãƒ¼æ ªå¼ä¼šç¤¾ã¯ã€2023å¹´10æœˆ1æ—¥ã«LINEãƒ¤ãƒ•ãƒ¼æ ªå¼ä¼šç¤¾ã«ãªã‚Šã¾ã—ãŸã€‚LINEãƒ¤ãƒ•ãƒ¼æ ªå¼ä¼šç¤¾ã®æ–°ã—ã„ãƒ–ãƒã‚°ã¯ã“ã¡ã‚‰ã§ã™ã€‚LINEãƒ¤ãƒ•ãƒ¼ Tech Blog Yahoo!ãƒ‡ãƒ™ãƒãƒƒãƒ‘ãƒ¼ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã®ä¸é‡Ž(@Hiraku)ã§ã™ã€‚ã“ã‚Œã¾ã§ã€JavaScriptã§éžåŒæœŸå‡¦ç†ã‚’æ›¸ãä¸Šã§ã®å•é¡Œã¨ã—ã¦ã€ã‚³ãƒ¼ãƒ«ãƒãƒƒã‚¯åœ°ç„ã‚„ã‚¨ãƒ©ãƒ¼å‡¦ç†ã«ä¾‹å¤–ãŒä½¿ãˆãªã„ã“ã¨ãªã©ã‚’è§£èª¬ã—ã¦ãã¾ã—ãŸã€‚ ã“ã‚Œã‚‰ã®å•é¡Œã«å¯¾å‡¦ã™ã‚‹ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã®1ã¤ã§ã‚ã‚‹jQuery.Deferredã«é–¢ã—ã¦ã€ã‚‚ã†å°‘ã—ä¸å¯§ã«è§£èª¬ã„ãŸã—ã¾ã™ã€‚ãªãŠã€jQueryã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¯è¨˜äº‹åŸ·ç†æ™‚ç‚¹ã®æœ€æ–°ã§ã‚ã‚‹ã€1.9.1ã‚’æƒ³å®šã—ã¦ã„ã¾ã™ã€‚ jQuery.Deferredã¨ã¯ jQuery.Deferredã¨ã¯jQueryã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³1.5ã‹ã‚‰å°Žå…¥ã•ã‚ŒãŸã€éžåŒæœŸå‡¦ç†ã‚’ã†ã¾ãæ‰±ã†ãŸã‚ã®æ¨™æº–ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã§ã™ã€‚ä½¿ã„ã“ãªã™ã“ã¨ã§ã€ä»¥ä¸‹ã®ã‚ˆã†ãªåŠ¹æžœãŒè¦‹è¾¼ã‚ã¾ã™ã€‚ éžåŒæœŸå‡¦ç†ã‚’é€£çµ
l-liroki 2013/03/05
jquery

JavaScript
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http://www.rvl.io/mizchi/js_hell_on_earth
l-liroki 2013/03/05
javascript
ãƒªãƒ³ã‚¯
Flight by Twitter
A lightweight, component-based JavaScript framework for assigning behavior to DOM nodes.Flight A lightweight, component-based JavaScript framework from Twitter View on GitHub Overview Flight is a lightweight, component-based JavaScript framework that maps behavior to DOM nodes. Twitter uses it for their web applications. By way of example, we've including a simple em ail client demo (browse the sou
l-liroki 2013/02/12
javascript
ãƒªãƒ³ã‚¯
ã‚µãƒ¼ãƒ“ã‚¹çµ‚äº†ã®ãŠçŸ¥ã‚‰ã› - NAVER ã¾ã¨ã‚
ã‚µãƒ¼ãƒ“ã‚¹çµ‚äº†ã®ãŠçŸ¥ã‚‰ã› NAVERã¾ã¨ã‚ã¯2020å¹´9æœˆ30æ—¥ã‚’ã‚‚ã¡ã¾ã—ã¦ã‚µãƒ¼ãƒ“ã‚¹çµ‚äº†ã„ãŸã—ã¾ã—ãŸã€‚ ç´„11å¹´é–“ã€NAVERã¾ã¨ã‚ã‚’ã”åˆ©ç”¨ãƒ»ã”æ„›é¡§ã„ãŸã ãèª ã«ã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã—ãŸã€‚
l-liroki 2012/12/19
jquery

javascript
ãƒªãƒ³ã‚¯
Backbone.js FAQ æ—¥æœ¬èªžè¨³ - "is a library, not a framework"
Backbone.js FAQ ã‚’æ—¥æœ¬èªžè¨³ã—ã¾ã—ãŸ Backbone/docs/FAQ.md at master Â· enja-oss/Backbone Â· GitHub ä¸Šè¨˜ã®GitHubã‹ã‚‰å‚ç…§ã§ãã¾ã™ã€‚ ã¾ãšFAQã‹ã‚‰è¨³ã—ã¾ã—ãŸãŒã€æœ€çµ‚çš„ã«ã¯ã¿ã‚“ãªã®åŠ›ã§å…¨è¨³ãƒ‰ã‚ãƒ¥ãƒ¡ãƒ³ãƒˆã«ã™ã‚‹ã®ãŒç›®æ¨™ã€‚ã»ã‚“ã¨ã¯æœ¬å®¶ã‚’forkã™ã¹ãã ã£ãŸã‹ã‚‚ã§ã™ãŒã€Pull Requestã«å‘ã‘ã¦ã®æ•´å‚™ã¯å¾Œã§è€ƒãˆã¾ã™ã€‚:) ã„ã¾ã¯ã€æœ‰å¿—ã§Markdownã§ã•ãã•ãã¨æ—¥æœ¬èªžãƒ‰ã‚ãƒ¥ãƒ¡ãƒ³ãƒˆã‚’æ›¸ããŸã‚ã¦ã„ã‘ã‚Œã°ã„ã„ã‚“ã˜ã‚ƒãªã„ã‹ã¨æ€ã£ã¦ã„ã¾ã™ã€‚ enja-oss/Backbone ã£ã¦ã“ã¨ã§Issueã¨ã‹Pull Requestå¤§æ“è¿Žã§ã™ï¼ è©³ã—ãã¯ãƒªãƒã‚¸ãƒˆãƒªã‚’ã”è¦§ãã ã•ã„ã€‚ Backbone.js ã®æœ¬æ€§ã¯MVCã§ã‚‚ãƒ•ãƒ¬ãƒ¼ãƒ ãƒ¯ãƒ¼ã‚¯ã§ã‚‚ãªã„ ã€Œã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã‚µã‚¤ãƒ‰MVCãƒ•ãƒ¬ãƒ¼ãƒ ãƒ¯ãƒ¼ã‚¯ = Backbone.jsã€ã¨ã„ã†ã‚ˆã†ãªè¡¨ç¾ãŒ
l-liroki 2012/11/29
backbone.js

javascript

js
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Modernizr: the feature detection library for HTML5/CSS3
MENURespond to your userâ€™s browser features.Modernizr tells you what HTML, CSS and JavaScript features the userâ€™s browser has to offer.Add your detects Development build What is Modernizr?Itâ€™s a collection of superfast tests â€“ or â€œdetectsâ€ as we like to call them â€“ which run as your web page loads, then you can use the results to tailor the experience to the user. Why do I need it?All web develope
l-liroki 2012/11/09
detects HTML5 and CSS3 features

javascript
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How To Write Fast, Memory-Efficient JavaScript â€” Smashing Magazine
There are many common pitfalls when it comes to writing memory-efficient and fast code. In this article weâ€™re going to explore some test-proven approaches for writing code that performs better. JavaScript engines such as Googleâ€™s V8 (Chrome, Node) are specifically designed for the fast execution of large JavaScript applications. As you develop, if you care about memory usage and performance, you s
l-liroki 2012/11/09
javascript

V8
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JavaScriptã®ç„¡åé–¢æ•°ã®å®Ÿè¡Œ (function(){})() ã¨ (function(){}()) ã®é•ã„
JavaScript Advent Calendar 2011 (ã‚ªãƒ¬æ¨™æº–ã‚³ãƒ¼ã‚¹) 17 æ—¥ç›®ã€polygon_planet ã§ã™ã€‚ ãšã£ã¨ Advent Calendar å‚åŠ ã—ã¦ã¿ãŸã„ãªãã¨æ€ã£ã¦ãŸã‚“ã§ã™ãŒ ãƒã‚¿ãŒæ€ã„ã¤ã‹ãªã„æ—¥ã€…ã§åŠåˆ†è«¦ã‚ã¦ãŸã‚“ã§ã™ãŒã€è€ƒãˆéŽãŽãªæ°—ãŒã—ã¦ããŸã®ã§ åˆ¥ã«ãŠã‚‚ã—ã‚ã„è¨˜äº‹ã§ã‚‚ãªã„ã—ã€æŠ€è¡“çš„ã«ã‚‚å‚è€ƒã«ãªã‚‹ã®ã‹ä¸æ˜Žã§ã™ãŒã¨ã‚Šã‚ãˆãšæ›¸ãã¾ã™ã€‚ ã‚‚ã—ã‹ã—ãŸã‚‰åŒã˜ã‚ˆã†ãªã“ã¨è§£èª¬ã—ã¦ã‚‹è¨˜äº‹ãŒã™ã§ã«ã‚ã‚‹ã‹ã‚‚â€¦(ã†ã¾ãæ¤œç´¢ã§ãã¦ãªã„) JavaScript ã§ç„¡åé–¢æ•°ã‚’ãã®å ´ã§å®Ÿè¡Œã™ã‚‹ã¨ãã€ (function() { // å‡¦ç† })(); ã¨ã„ã†æ›¸ãæ–¹ãŒä¸»æµã£ã½ã„ã§ã™ãŒã€ (function() { // å‡¦ç† }()); ã“ã†æ›¸ã„ãŸã‚‰ã©ã†é•ã†ã®ã‹ã€‚ ã¡ãªã¿ã«ã€ function() { }(); // ã‚¨ãƒ©ãƒ¼ ã“ã‚Œã¯å¼ã§ã¯ãªãæ–‡ã¨ã—ã¦æ‰±ã‚ã‚Œã‚‹ãŸã‚ã‚¨ãƒ©ãƒ¼ã§ã™ã€‚ ãŸã ã—ã€
l-liroki 2012/11/06
javascript
ãƒªãƒ³ã‚¯
JavaScriptã®ãƒ†ã‚¹ãƒˆãƒ„ãƒ¼ãƒ«ã€Œtestemã€ãŒç´ æ™´ã‚‰ã—ã„ãž - Mach3.laBlog
ã“ã®è¨˜äº‹ã¯è³žå‘³æœŸé™åˆ‡ã‚Œã§ã™ã€‚ï¼ˆæ›´æ–°ã‹ã‚‰1å¹´ãŒçµŒéŽã—ã¦ã„ã¾ã™ï¼‰ JavaScriptãƒ¦ãƒ‹ãƒƒãƒˆãƒ†ã‚¹ãƒˆä¸€å¹´ç”Ÿã®ç§ãŒã€Nettuts+ ã®ãƒãƒ¥ãƒ¼ãƒˆãƒªã‚¢ãƒ«ã§çŸ¥ã£ãŸãƒ†ã‚¹ãƒˆãƒ„ãƒ¼ãƒ« ã€Œtestemã€ã®ãŠé™°ã§å¤§å¤‰æ—ã£ãŸã®ã§æ˜¯éžãŠå‹§ã‚ã—ãŸãã€ã“ã“ã§ç´¹ä»‹ã—ã¦ã¿ã¾ã™ã€‚ testem ã£ã¦ãªã« testem via GitHub : airportyh/testem Unit testing in Javascript can be tedious and painful, but Testem makes it so easy that you will actually want to write tests. è¦ã™ã‚‹ã«ã€é¢å€’ãªJSã®ãƒ¦ãƒ‹ãƒƒãƒˆãƒ†ã‚¹ãƒˆã‚’ã‚ˆã‚Šå¿«é©ã«ã—ã¦ã¿ã‚“ãªã§ãƒãƒƒãƒ”ãƒ¼ã«ãƒ†ã‚¹ãƒˆæ›¸ã“ã†ã‚ˆï¼ã¨ã„ã†ãƒ„ãƒ¼ãƒ«ã§ã™ã€‚ testemè‡ªä½“ã¯node.jsãƒ™ãƒ¼ã‚¹ã§å‹•ä½œã—ã€Jasmine/QUnit/Mochaã«å¯¾å¿œã—ã¦
l-liroki 2012/11/02
javascript

node.js
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JavaScriptã®ã‚³ãƒ¼ãƒ‡ã‚£ãƒ³ã‚°ã‚¹ã‚¿ã‚¤ãƒ«ã‚’ãƒã‚§ãƒƒã‚¯Â·jscheckstyle MOONGIFT
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l-liroki 2012/10/18
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l-liroki 2012/10/18
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l-liroki 2012/09/19
javascript
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l-liroki 2012/09/17
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JavaScriptã®å¤‰æ•°ã«ã¤ã„ã¦ã®è€ƒå¯Ÿ | Like@Lunatic
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l-liroki 2012/09/17
javascript
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JSCompress - The JavaScript Compression Tool
About JSCompress JSCompress is an online JavaScript compressor that allows you to compress and minify all of your JS files by up to 80% of their original size. Copy and paste your code or you can upload and combine multiple files and then compress. We use UglifyJS 3 and babel-minify for all JavaScript minification and compression. Why You Should Compress JavaScript There are a number of reasons wh
l-liroki 2012/09/15
javascript
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