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JavaScript puzzlers original 1. ["1", "2", "3"].map (parseint)答案：[1, NaN, NaN]解析：parseInt (val, radix) ：两个参数，val值，radix基数（就是多少进制转换） map 能传进回调函数 3参数 (element, index, array) parseInt(‘1‘, 0); //0代表10进制 parseInt(‘2‘, 1); //没有1进制，不合法 parseInt(‘3‘, 2); //2进制根本不会有3巩固：["1", "1", "11","5"].map(parseInt) //[1, NaN, 3, NaN] 2. [typeof null, NULL instanceof Object]答案：["object", false]解析：null代表空对象指针，所以typeof判断成一个对象。可以说JS设计上的一个BUG instanceo
concurrent APIs and their mechanisms, but it also provides design principles, patterns, and thought models that allow us to better build the right, well-performing concurrent programs.Readers of this book are programmers with some experience in Java programming, programmers who want to understand the improvements and new features of Java SE 5,6 on-line technology, and enthusiasts of
just provide a list of concurrent APIs and their mechanisms, but it also provides design principles, patterns, and thought models that allow us to better build the right, well-performing concurrent programs.Readers of this book are programmers with some experience in Java programming, programmers who want to understand the improvements and new features of Java SE 5,6 on-line technology, and enthusiasts of
Java tutorial translation Sequence Java Introduction Build a JSE development environment-install JDK and eclipse Language basics Java Hello World Program Analysis Variable Java Variables Java Native type Conversion of Java
. This book not only provides a list of concurrent APIs and its mechanisms, but also provides design principles, models, and thought models that allow us to build correct and well-performing concurrent programs. Readers of this book are programmers with certain Java programming experience, programmers who want to learn about Java SE 5 and 6 improvements and new features in thread technology, as well as
Programming ''' which book is better · Java JDK 6 Study Notes (Lin Xinliang)A friend of mine has read this before and it feels pretty good. Suitable for entryRecommended JAVA entry books I. Basic1. Thinking in java. The first entry is to establish a correct concept.2. I have not read Core Java yet. This book is closer
/java: the Java sub-community of Reddit. Official Website Stackoverflow: Q A platform. Official Website VJUG: Virtual Java User Group. Official Website Influential books A classic Java book with a wide range of influences and worth reading. Valid Java (2nd Edition)
the winner of the Jolt award. He was an outstanding engineer at Sun and a senior system designer at Transarc. Bloch has led the team to design and implement numerous Java platform features, including the JDK 5.0 enhanced version and the award-winning Java Collections Framework. His books also include Java Puzzlers and
Convert a string in the format of "yyyy-mm-dd" to Java. SQL. Date: Simpledateformat bartdateformat = new simpledateformat ("yyyy-mm-dd "); String datestringtoparse = "2007-7-12 "; Try { Java. util. Date = bartdateformat. parse (datestringtoparse ); Java. SQL. Date sqldate = new java. SQL. date (date. gettime ());S
implementation of the JSF standard, developed by Oracle. Website JavaServer Pages: A common Template Library for Web sites that supports custom tag libraries. Website Liquibase: A tool for tracking, managing, and applying database scheme changes independently from specific databases. Website Community R/java:reddit's Java child community. Website StackOverflow: Question and answer platform. Website Vjug: Virtual
puzzles:traps, pitfalls and Corner Cases (by Joshua Bloch)Java Godfather's another classic –java Puzzlers,amazon five-star books. How much do you think you know about Java? Are you a code God Scout? Have you ever spent several days tracking down a bug caused by a trap or flaw in J
, pitfalls and Corner Cases (by Joshua Bloch)Java Godfather's another classic -java puzzlers,Amazon five-star book. Think you know more about Java? Are you a code God Scout? Have you ever spent several days tracking down a bug caused by Java or its class library pitfalls and
A friend familiar with Java multithreading must know a lot about the thread pool of JAva, the core implementation class in the JDK is java.util.concurrent.ThreadPoolExecutor. You may be aware of its principle, even read its source code; But like me, people may misunderstand its role ... Now the question is, why does the JDK provide the Java thread pool? What are
This article is excerpted from other people's Web site, I read less books, I want to read the book as a list of books.Original address: http://blog.sina.com.cn/s/blog_6aa1784101011hl5.htmlBody:There has always been such an idea, listed I personally think in the study and use of Java process can be recommended to read books, to beginners or want to deep friends some advice, to help grow. I have read the recommended, I will recommend some friends have r
Java Learning recommended bibliography Posted by Boyan on 2010-11-11 Leave a comment (5) Go to comments I've always had this idea. I personally think that in learning and using the Java process can recommend a reading of books, for beginners or want to go to a friend some advice to help grow. I have read the recommendations, and will recommend some friends read and Word-of-mouth good books. First, the Bas
following interfaces:Public interface Interfacea {public void F () throws IOException;}Our test class implements this interface, then test's F method either does not throw an exception, or can only throw ioexception, in fact, there are more trivial rules, detailed can refer to "Java puzzlers" 37th puzzle. So this is just the opposite of traditional inheritance and implementation interfaces, and object-o
I. BASIC CLASSES1, "Thinkingjava", the first place to get started is to establish the correct concept.2, "Core Java", I did not read the system, this book closer to practice, more API introduction, the same, update more frequently.Second, Advanced class1, "Effective Java", after familiar with the grammar, API, you need to know best practices and traps, no better than this one.2, "
authors of this book are the main members of the Java Community Process JSR 166 Expert Group (concurrency tool) and are represented in many other JCP expert groups. Brian Goetz has more than 20 years of experience in the software consulting industry and has at least 75 articles on Java development. Tim Peierls is a model of "modern multiprocessor," and he has studied boxpop.biz, record art and theatrical p
classes.This book is intended for developers of Java programs to read.About the authorThe authors of this book are Java Community Process JSR166 The main members of the Group of Experts (concurrent tools) and served in many other JCP expert groups. Brian Goetz has more than 20 years of experience in the software consulting industry and has at least 75 articles on Java
subclass or implemented interface class. It is not allowed to throw exceptions not declared in the base class or interface. This is to make the code of the base class continue to be used. In this example, we may think that f needs to declare an exception or handle it, but actually it does not, the original reference to Java puzzlers is that "the set of checked type exceptions that a method can throw is t
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