『Polished Ruby Programmingã€ï¼ˆJeremy Evans著）をèªã¿ã¾ã—ãŸï½œTechRacho by BPSæ ªå¼ä¼šç¤¾
ã“ã‚“ã«ã¡ã¯ã€hachi8833ã§ã™ã€‚å¤ä¼‘ã¿èª²é¡Œå›³æ›¸ã¨ã„ã†ã‚ã‘ã§ã¯ã‚ã‚Šã¾ã›ã‚“ãŒã€ŽPolished Ruby Programmingã€ã‚’2回èªã¿ã€Webãƒãƒ¼ãƒ 内ã§ã‚‚発表ã—ã¾ã—ãŸã€‚ "Polished Ruby Programming" is now available for purchase! The book teaches design principles, best practices, and appropriate trade-offs to the intermediate Ruby programmer. I look forward to seeing what people think about the book. https://t.co/wFRn4yHbVC @PacktPub — Jeremy Evans (@jeremyevans0) July 9, 2021
exactOptionalPropertyTypes ã«ã‚ˆã›ã¦ - Object.create(null)
TypeScript 4.4 ã« exactOptionalPropertyTypes ã¨ã„ã†ã‚ªãƒ—ショナルãªãƒ—ãƒãƒ‘ティã«é–¢ã™ã‚‹ã‚³ãƒ³ãƒ‘イラオプションãŒè¿½åŠ ã•ã‚Œã‚‹ã®ã‚’å—ã‘ã¦, ãã‚‚ãもオプショナルãªãƒ—ãƒãƒ‘ティã¨ã¯ä½•ãªã®ã‹, ã©ã†ã„ã£ãŸã¨ãã«ä½¿ã†ã¨è‰¯ã„ã®ã‹, exactOptionalPropertyTypes ãŒã©ã†å¬‰ã—ã„ã®ã‹ã‚’考ãˆã¦ã¿ã¾ã™. ã‚らã‹ã˜ã‚ç§å€‹äººã®ç«‹å ´ã‚’明らã‹ã«ã—ã¦ãŠãã¨, åž‹ã«ã‚ˆã‚‹å®‰å…¨æ€§ã‚’é‡è¦–ã™ã‚‹å‚¾å‘ãŒã‚ã‚Šã¾ã™ (ã‚„ã‚„éŽæ¿€æ´¾å¯„ã‚Š). exactOptionalPropertyTypes ã«ã¤ã„ã¦ã¯ GitHub ã® discussion issue ã§ã®è°è«–ã‚‚å‚考ã«ãªã‚‹ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“. å‰æ ãã‚‚ãもオプショナルãªãƒ—ãƒãƒ‘ティã¨ã¯ オプショナルãªãƒ—ãƒãƒ‘ティã¯, オブジェクト型ã®ãƒ—ãƒãƒ‘ティã®ã†ã¡, key?: Type ã®ã‚ˆã†ã« ?: ã§å®£è¨€ã•ã‚Œã¦, ãã®ãƒ—ãƒãƒ‘ティãŒçœç•¥å¯èƒ½ã§ã‚ã‚‹
Announcing TypeScript 4.4 - TypeScript
Today we’re excited to announce the availability of TypeScript 4.4! If you haven’t heard of TypeScript yet, it’s a language that builds on JavaScript by adding syntax for static types. Tools like the TypeScript compiler just erase those types, leaving you with clean readable JavaScript that you can run anywhere; but those types are there to be type-checked! Types make your intentions explicit, and
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