检索结果-内蒙古大学图书馆

Automatic Migration from Synchronous to Asynchronous javascript APIs

PROCEEDINGS OF THE ACM ON PROGRAMMING LANGUAGES-PACMPL 2021年第OOPSLA期5卷 1–27页

作者： Gokhale, Satyajit Turcotte, Alexi Tip, Frank Northeastern Univ Boston MA 02115 USA

The javascript ecosystem provides equivalent synchronous and asynchronous Application Programming Interfaces (APIs) for many commonly used I/O operations. Synchronous APIs involve straightforward sequential control flow that makes them easy to use and understand, but their "blocking" behavior may result in poor responsiveness or performance. Asynchronous APIs impose a higher syntactic burden that relies on callbacks, promises, and higher-order functions. On the other hand, their nonblocking behavior enables applications to scale better and remain responsive while I/O requests are being processed. While it is generally understood that asynchronous APIs have better performance characteristics, many applications still rely on synchronous APIs. In this paper, we present a refactoring technique for assisting programmers with the migration from synchronous to asynchronous APIs. The technique relies on static analysis to determine where calls to synchronous API functions can be replaced with their asynchronous counterparts, relying on javascript's async/await feature to minimize disruption to the source code. Since the static analysis is potentially unsound, the proposed refactorings are presented as suggestions that must be reviewed and confirmed by the programmer. The technique was implemented in a tool named Desynchronizer. In an empirical evaluation on 12 subject applications containing 316 synchronous API calls, Desynchronizer identified 256 of these as candidates for refactoring. Of these candidates, 244 were transformed successfully, and only 12 resulted in behavioral changes. Further inspection of these cases revealed that the majority of these issues can be attributed to unsoundness in the call graph.

关键词： Refactoring javascript Static Analysis Asynchronous Programming

来源：评论

学校读者我要写书评

暂无评论

javascript Development Environment for Programming Education using Smartphones 7

JavaScript Development Environment for Programming Education...

引用

7th International Symposium on Computing and Networking (CANDAR)

作者： Uehara, Minoru Toyo Univ Dept Informat Sci & Arts Kawagoe Saitama Japan

ISBN: (纸本)9781728152684

A development environment that allows programming at any time or place is required for supporting programming education. Currently, smartphones are more popular than personal computers. Therefore, if a development environment for smartphones is available then students can learn to program in a normal room, with no personal computer, or on the way to school. A browser-based development environment can be realized using javascript as a learning language. In this paper, we describe the design, implementation, and evaluation of a javascript development environment. Our development environment is suitable for smartphones and is easy to use even with a small screen.

关键词： Programming Education Smartphone javascript

来源：评论

学校读者我要写书评

暂无评论

javascript Quick Syntax Reference 1

引用

丛书名： Expert's voice in Web development

2015年

作者： Mikael Olsson

ISBN: (数字)9781430264941

ISBN: (纸本)9781430264934;9781430264941

javascript Quick Syntax Reference is a condensed syntax reference to the javascript language. It presents the essentials of javascript in a well-organized format that can be used as a handy reference. This includes the latest ECMAScript 5, JSON (javascript Object Notation) and DOM (Document Object Model) specifications and implementations. You wont find any technical jargon, bloated samples, drawn out history lessons or witty stories in this book. What you will find is a javascript reference that is concise, to the point and highly accessible. The book is packed with useful information and is a must-have for any javascript programmer or Web developer. In javascript Quick Syntax Reference, you will find a concise reference to javascript programming language syntax; has short, simple and focused code examples; and includes a well laid out table of contents and a comprehensive index allowing easy review. What youll learn What is the lexical structure of the latest javascript and ECMAScript 5 What are types, values, variables, expressions, operators and statements How to use objects, arrays, functions, classes, and regular expressions What are DOM and JSON and how to use them How to effectively implement both client-side and server-side javascript code Who this book is for This book is a handy, pocket quick scripting syntax reference for those experienced in javascript as well as programmers, web developers, tinkerers and people new to javascript.

关键词： reference syntax quick javascript

来源：评论

学校读者我要写书评

暂无评论

javascript Middleware for Mobile Agents Support on Desktop and Mobile Platforms

JavaScript Middleware for Mobile Agents Support on Desktop a...

引用

International Conference on Information Technology and Systems (ICITS)

作者： Silva, Carlos Costa, Nuno Grilo, Carlos Veloz, Jorge Polytech Inst Leiria Sch Technol & Management Leiria Portugal Univ Tecn Manabi Portoviejo Ecuador

ISBN: (纸本)9783319734507;9783319734491

The evolution of technology in interconnection solutions such as Networks or the Internet, have allowed many communication architectures to be born and a varied interconnectivity. Here, we present a project that relies on the mobile agent computing paradigm. A middleware using the javascript language that allows the execution and ability to move mobile agents through the local network and Internet. This initiative arose as a way of dealing with problems raised by the considerable amount of existing Java based mobile agents middleware, which force the installation of the Java Virtual Machine in the devices, making complicated its execution in operating systems like macOS, iOS and others non-java friendly O.S. Our middleware works steadily in all operating systems, requiring only the installation of ***. For mobile platforms the middleware is developed using React-native that allows it to run on mobile operating systems such as Android and iOS.

关键词： Middleware Mobile agents javascript node.js React-native Mobile operating systems

来源：评论

学校读者我要写书评

暂无评论

Application note: An open-source javascript library to simulate dairy cows and young stock, their growth, requirements and diets

引用

COMPUTERS AND ELECTRONICS IN AGRICULTURE 2016年 120卷 7-9页

作者： Vaillant, J. Baldinger, L. Leibniz Ctr Agr Landscape Res Inst Land Use Syst Eberswalder Str 84 D-15374 Muncheberg Germany Univ Nat Resources & Life Sci Div Livestock Sci Dept Sustainable Agr Syst Gregor Mendel Str 33 A-1180 Vienna Austria

A free open-source javascript library for dairy herd simulation was developed and is available in a public repository. The library called *** is part of SOLID-DSS, a decision support system for low-input dairy farms, but can be used independently for any agricultural web-based decision support or modeling purposes. The library covers the most important routines to describe relevant properties of dairy cow herds and individual cows ranging from herd structure simulation to diet optimization. The library, examples and source code are available at https://***. (c) 2015 Elsevier B.V. All rights reserved.

关键词： Dairy cows javascript Decision support Open-source

来源：评论

学校读者我要写书评

暂无评论

An information flow monitor-inlining compiler for securing a core of javascript

引用

IFIP Advances in Information and Communication Technology 2014年 428卷 278-292页

作者： Fragoso Santos, José Rezk, Tamara Inria France

ISBN: (纸本)9783642554148

Web application designers and users alike are interested in isolation properties for trusted javascript code in order to prevent confidential resources from being leaked to untrusted parties. Noninterference provides the mathematical foundation for reasoning precisely about the information flows that take place during the execution of a program. Due to the dynamicity of the language, research on mechanisms for enforcing noninterference in javascript has mostly focused on dynamic approaches. We present the first information flow monitor inlining compiler for a realistic core of javascript. We prove that the proposed compiler enforces termination-insensitive noninterference and we provide an implementation that illustrates its applicability. © IFIP International Federation for Information Processing 2014.

关键词： High level languages Program compilers Information flows Inlining javascript Mathematical foundations ON dynamics WEB application

来源：评论

学校读者我要写书评

暂无评论

javascript Programmer's Reference 1

引用

2013年

作者： Thomas Valentine, Jonathan Reid

ISBN: (数字)9781430246305

ISBN: (纸本)1430246294;9781430246299

javascript Programmer's Reference is an invaluable resource that won't stray far from your desktop (or your tablet!). It contains detailed information on every javascript object and command, and combines that reference withpractical examples showcasing how you can use those commands inthe real world. Whether you're just checking the syntax of a method or you're starting out on the road to javascript mastery, the javascript Programmer's Referencewill be an essential aid. With a detailed and informative tutorial section giving you the ins and outs of programming with javascript and the DOMfollowed by a command-by-command reference, your next project will pop with interactivity and keep your audience coming back for more. javascript Programmer's Reference isyour one-stop source for everything you'll need to know to become a cutting edge web developer using the latest tools and techniques available today. In depth explanations and activities to explain not just the command in question, but why it is used in that way Progressive learning curve to not overwhelm and confuse you Handy and extremely informative quick-reference of every command within the javascript & DOM specifications What youll learn Create web pages of any length or complexity. Access browser controls to further your page's functionality. Design and program custom features into a web page, such as recording and acting on user preferences. Offer prospective employers an advanced skill set that is in high demand. Converse intelligently with other developers using universally agreed-upon terminology. Discover your full potential and realize that you now know enough to explore other, more powerful web development languages. Who this book is for Web developers of any skill level will find this book to be invaluable. The tutorials clearly explain the use of the two languages for the new user as well as providing a quick reference for the experienced developer to use when a command's use or syntax is in question

关键词： reference programmer javascript

来源：评论

学校读者我要写书评

暂无评论

javascript By Example (2nd Edition) 2

引用

2010年

作者： Ellie Quigley

ISBN: (纸本)9780137054893

The World’s Easiest Java Script Tutorial–Fully Updated! ? javascript by Example, Second Edition, is the easiest, most hands-on way to learn javascript. Legendary programming instructor Ellie Quigley has thoroughly updated her classic book to deliver the skills and information today’s javascript users need most–including up-to-the-minute coverage of javascript programming constructs, CSS, Ajax, JSON, and the latest javascript libraries and best practices. ? Quigley illuminates every technique with focused, classroom-tested code examples, detailed line-by-line explanations, and real program output. This exceptionally clear, easy-to-understand book takes you from your first script to advanced techniques. It’s the only javascript book you’ll ever need! ? New in This Edition? End-of-chapter study tools, including classroom-tested labs

关键词： example javascript

来源：评论

学校读者我要写书评

暂无评论

Beginning javascript, Fourth Edition 4

引用

丛书名： Programmer to programmer.

2009年

作者： Paul Wilton Jeremy McPeak

ISBN: (数字)9780470631782

ISBN: (纸本)9780470525937

The perennial bestseller returns with new details for using the latest tools and techniques available with javascript javascript is the definitive language for making the Web a dynamic, rich, interactive medium. This guide to javascript builds on the success of previous editions and introduces you to many new advances in javascript development. The reorganization of the chapters helps streamline your learning process while new examples provide you with updated javascript programming techniques. You'll get all-new coverage of Ajax for remote scripting, javascript frameworks, javascript and XML, and the latest features in modern Web browsers. Plus, all the featured code has been updated to ensure compliance with the most recent popular Web browsers. Introduces you to the latest capabilities of javascript, the definitive language for developing dynamic, rich, interactive Web sites Features new coverage of data types and variables, javascript and XML, Ajax for remote scripting, and popular javascript frameworks Offers updated code that ensures compliance with the most popular Web browsers Includes improved examples on the most up-to-date javascript programming techniques Continuing in the superlative tradition of the first three editions, Beginning javascript, Fourth Edition, gets you up to speed on all the new advances in javascript development. Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.

关键词： javascript beginningIntroductory & Beginning Programming Computers & Internet

来源：评论

学校读者我要写书评

暂无评论

Practical Initialization Race Detection for javascript Web Applications

引用

PROCEEDINGS OF THE ACM ON PROGRAMMING LANGUAGES-PACMPL 2017年第OOPSLA期1卷 1-22页

作者： Adamsen, Christoffer Quist Moller, Anders Tip, Frank Aarhus Univ Aarhus Denmark Northeastern Univ Boston MA 02115 USA

Event races are a common source of subtle errors in javascript web applications. Several automated tools for detecting event races have been developed, but experiments show that their accuracy is generally quite low. We present a new approach that focuses on three categories of event race errors that often appear during the initialization phase of web applications: form-input-overwritten errors, late-event-handler-registration errors, and access-before-definition errors. The approach is based on a dynamic analysis that uses a combination of adverse and approximate execution. Among the strengths of the approach are that it does not require browser modifications, expensive model checking, or static analysis. In an evaluation on 100 widely used websites, our tool INITRACER reports 1 085 initialization races, while providing informative explanations of their causes and effects. A manual study of 218 of these reports shows that 111 of them lead to uncaught exceptions and at least 47 indicate errors that affect the functionality of the websites.

关键词： event race detection javascript dynamic analysis

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：