Writing regular Expressions (regexes) in groovy is a pleasure compared to Java. In Java, regexes programming requires not only the processing of pattern and Matcher objects, but also the writing of tedious boilerplate code (boilerplate coding). Groovy does a simple encapsulation of these two Java objects, adds some additional practical methods, and gives a simplified new syntax and 3 new operators.
In
Why asynchronous programming
In the present large-scale high concurrent web application, because of the hardware and the network limit, I/O processing speed is quite slow, often becomes the WEB system performance bottleneck. Node.js through Non-blocking IO and event-driven is a good mitigation of the Web server's resource footprint in high concurrency, greatly improving the Web server's ability to handle high concurrency. At the same time, the lightweight and fast asynchronous programming broug
The closure of dynamic languages is an eternal topic. The convenience and quickness of closures in the coding process make the advocates of the dynamic language relish it, while static languages, especially the Java language fans, will come up with anonymous inner classes that the Java language has similar functions. I've been using the Java language for six or seven years now, and I really like the Java language as well, but I never dared to compare it to the anonymous inner class and closure o
Groovy supports two types of strings: A generic Java string, an instance of java.lang.String, and Gstrings, which is an instance of groovy.lang.GString, and allows the text to contain placeholders. Gstrings is not a subclass of string because the string class is the final class (final Class) that cannot be inherited. However, Gstring is the same as a generic string, because groovy can transform gstrings int
that the language can be composed entirely of expressions, ignoring results when not interested in the results. In fact, all functional languages can completely eliminate this distinction, using only expressions.
Groovy's if and?:
In the Java next-generation language, the separation between traditional imperative language (Groovy) and functional languages (Clojure and Scala) shows evolution to expressions. Groo
In the previous article, we learned how to build a groovy development environment to prepare for our groovy journey, and do not know if you are ready? Let's take a look at the similarities and differences between groovy and what we know about Java.Groovy is lightweight Java, which differs from Java in six main points, which we'll explain in one step.One: Both the
Article reprint: http://www.cnblogs.com/zz0412/p/jenkins02.htmlFirst, Jenkins installationIn the simplest case, Jenkins requires only two steps:1. Download the latest version (a WAR file). Jenkins Official website: http://Jenkins-ci.org/2, the fate of the line run Java-jar Jenkins.warNote:
Pre-installation concerns:Q: Which version of Jenkins should I choose?A: If you are officially using the recommended long-term support version (LTS), Reason: stable. If you are learning, whichever version you can.Which version of Q:JDK should I install?A: Recommended installation of JDK7, Reason: Some plugins must require JDK7 support. For example: monitoring plug-inWhich version of Q:tomcat should I use?A:tomcat6 or 7 can be. If you're going to use t
JVM-based two languages in the Java environment: Scala,groovyThe two languages can be mixed in a Java project;Scala: Static language, multi-paradigm language, combines object-oriented, process-oriented, and can interoperate with Java and NET, integrating a wide range of language features, including similar net-like closures, lambda expressions, it is more language features, language complexity is also high ~ ~Groovy: Dynamic language, both as an objec
1. Eachline--open and read each line of the fileNew File ("Foo.txt"). Eachline { println it.touppercase ();}2. ReadLines-The function is basically the same as the eachline, but it does not accept the closure as a parameter, but instead reads the file line into a listNew File ("Foo.txt"). ReadLines (); Linelist.each { println it.touppercase ();}3. Spliteachline-Reads each line of the file and then splits the array into rows with the specified delimiter. Needless to say, this method is quite
The collection in groovy is also much simpler to use than Java, and it's nice to note that groovy also offers many handy ways to sort the numbers in a collection, to find the maximum or minimum value, to reverse the elements, to overlap, to remove duplicate elements, to merge the arrays, to select the features that fit the criteria, Because these methods intellij the IDE with code hints, they are not explai
Exploration of groovy-covering invokemethod during the runtime of MOP 11
We will have been using the groovy hook language for a long time, that is, the "invokemethod" method and several other methods. We will implement the "invokemethod" method in a class, which is used to assign all or part of the methods of the class instance called during the runtime. We have discussed these in detail in the mop invok
Groovy's team leader--Guillaume Laforge says that MOP (Meta Object Protocol) is his favorite groovy feature.
Using mop can simply intercept and interpret properties and methods, and intercept has become familiar with AOP. In groovy, by overloading the Groovyobject Get/setproperty () function and the InvokeMethod () function, you can add your own hooks and behavior, More simple than Java to implement proxy a
TitleSolutionsReference online says empty directory {User.home}/.eclipse/org.eclipse.oomph.p2/cache to clean, and then reinstall, should be successful.I tried to find out whether or not the installation was unsuccessful. Then continue to check the information. Finally, after attempting to clear the cache in the \p2\org.eclipse.equinox.p2.repository directory under the Eclipse installation directory, the reinstallation is successful.The official website Groov
Groovy supports two types of strings: A generic Java string, an instance of java.lang.String, and Gstrings, which is an instance of groovy.lang.GString, and allows the text to contain placeholders. Gstrings is not a subclass of string because the string class is the final class (final Class) that cannot be inherited. However, Gstring is the same as a generic string, because groovy can transform gstrings int
Scott Davis will continue the discussion of Groovy metaprogramming, and this time he will delve into @Delegate annotations, @Delegate annotations blur the distinction between data types and behavior and static and dynamic types.
In the past few sessions of groovy, you've learned how groovy language features such as closures and metaprogramming add dynamic functi
This will be a series of text that expands our approach to the use of custom range classes. Perhaps we unknowingly use the range class in the groovy language, not even aware of it, or we often marvel at the convenience of using the range class in the coding process of the groovy language, but just marvel that we're not paying for it. Or we want to use the custom range class in the actual encoding, but we ca
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