You Don't Know JS: Scope & Closures (Paperback)
暫譯: 你不知道的 JavaScript:作用域與閉包 (平裝本)
Kyle Simpson
- 出版商: O'Reilly
- 出版日期: 2014-03-24
- 售價: $960
- 貴賓價: 9.5 折 $912
- 語言: 英文
- 頁數: 98
- 裝訂: Paperback
- ISBN: 1449335586
- ISBN-13: 9781449335588
已絕版
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相關主題
商品描述
No matter how much experience you have with JavaScript, odds are you don’t fully understand the language. This concise yet in-depth guide takes you inside scope and closures, two core concepts you need to know to become a more efficient and effective JavaScript programmer. You’ll learn how and why they work, and how an understanding of closures can be a powerful part of your development skillset.
Like other books in the "You Don’t Know JS" series, Scope and Closures dives into trickier parts of the language that many JavaScript programmers simply avoid. Armed with this knowledge, you can achieve true JavaScript mastery.
- Learn about scope, a set of rules to help JavaScript engines locate variables in your code
- Go deeper into nested scope, a series of containers for variables and functions
- Explore function- and block-based scope, “hoisting”, and the patterns and benefits of scope-based hiding
- Discover how to use closures for synchronous and asynchronous tasks, including the creation of JavaScript libraries
商品描述(中文翻譯)
無論你對 JavaScript 有多少經驗,可能都不完全理解這門語言。本書是一個簡潔而深入的指南,帶你了解作用域(scope)和閉包(closures),這兩個核心概念是成為更有效率和更有效的 JavaScript 程式設計師所必須掌握的。你將學習它們的運作原理及原因,以及理解閉包如何成為你開發技能組合中的一個強大部分。
與「你不知道的 JavaScript」系列中的其他書籍一樣,作用域與閉包 深入探討許多 JavaScript 程式設計師簡單避開的語言較為棘手的部分。掌握這些知識後,你可以實現真正的 JavaScript 精通。
- 了解作用域,這是一組幫助 JavaScript 引擎定位你程式碼中變數的規則
- 深入探討嵌套作用域,這是一系列用於變數和函數的容器
- 探索基於函數和區塊的作用域、「提升」(hoisting),以及基於作用域隱藏的模式和好處
- 發現如何使用閉包來處理同步和非同步任務,包括創建 JavaScript 函式庫