pentaho javascript

In Javascript, any function creates an execution context during execution, because the variables and functions declared for the function may only be within the function, when calling a function, a simple method is provided to create a free variable or a private sub-function. Javascript is more casual than other programming languages, so javascript code is full of

parameters have already been abstracted once, and map functions are abstracted for the second time, A higher level can be understood as an abstract level.Functional Programming in JavaScript JavaScript is a widely misunderstood language. Because it was full of a lot of copy-paste code in early Web development, the quality of JavaScript code is usually not high,

We will share nine best-used JavaScript development tools, code editors, and javascript development tools. Web design and development is one of the more and more popular career directions. If you want to excel in this field, you must have excellent skills, such as operating on different platforms, ides, and various other tools.When talking about platforms and ides, it is no longer the time to master an IDE

The Document Object model, Document Object Modeldom, is an API that interacts with JavaScript for content. JavaScript and Dom are often used as a whole, because JavaScript is usually for DOM manipulation and interaction. The main content is from: http://net.tutsplus.com/tutorials/javascript-ajax/

When I read the jQuery source code, I often think that those factors will make me unable to read the code. Which of the most critical factors is the earliest thought of as the architectural design of jQuery, when I finally found the jQuery architectural design portal, I found that the skillful use of the basic javascript syntax is the reference for reading the source code... syntaxHighlighter. all (); When I read the jQuery source code, I often think

1, to prevent misuse of JavaScript "no matter what Web page you want to change through JavaScript, you must think twice before you do it." The first thing to confirm is: Is it really necessary to add this extra behavior to the Web page? ” Personally, the author of this sentence in the current almost ubiquitous JavaScript to enhance the interactive experience of

Basic javascript knowledge sharing and functions, basic javascript knowledge 1. objects are suitable for data collection and management, and are easy to form a tree structure. Javascript includes a prototype chain feature that allows an object to inherit attributes of another object. Correct use of it can reduce the initialization time and memory consumption of o

Let's talk about javascript closures and javascript closures. The following are my study notes, which are useful for beginners of Javascript. I. Scope of Variables To understand closures, you must first understand the special variable scopes of Javascript.Variables have two scopes: global variables and local variables.The special feature of

This article mainly introduces nine best-to-use JavaScript development tools and code editors. If you need them, you can refer to Web design and development as one of the more and more popular career directions. If you want to excel in this field, you must have excellent skills, such as operating on different platforms, ides, and various other tools. When talking about platforms and ides, it is no longer the time to master an IDE and "eat it all. Fie

Closure is a difficult and characteristic of Javascript language. Many advanced applications rely on closures for implementation. I have been familiar with the concept of closure for a long time, but I have been confused and cannot understand what the closure of JavaScript is and what is its use, today, I saw an article about JavaScript closures (the original art

The birth background of JavaScriptIn the 90 's, the European and American countries of the Web programs are increasingly popular, but at that time users are also using telephone dial-up internet access, throughModem, the speed is only 28kb/s. And the Web program is becoming more and more abundant. In the age of no JavaScript, the formValidation, and so on, are performed on the server side.For example, users go to a registration page, fill in User name

Original (http://www.yeeyan.org/articles/view/luosheng/24380)As a beginner, it's important to understand how a timer works in JavaScript. Often their performance behavior is not so intuitive, and this is because they are in a single thread. Let's take a look at three functions for creating and manipulating a timer. var id = setTimeout(fn, delay);-Initializes a single timer, and the timer will invoke the specified function after a certain dela

JavaScript in the URLThe URL followed by a javascript: protocol qualifier, is a way to embed JavaScript code into the client. This particular protocol type specifies that the URL content is any string, which is the JavaScript code that will be run by the JavaScript parser. I

Personal Summary:A JavaScript engine is implemented by a standard interpreter, or by an instant compiler.Interpreter (interpreter): interprets one line and executes one line.Compiler (Compiler): all compiled into machine code, unified execution. (reduces the overhead of switching and scheduling, faster.) )The V8 engine is an instant compiler.Optimization strategy for V8 engine:1. Inline: Replace the expert code called by the function with the called f

JavaScriptQuick StartJavaScript code can be directly embedded anywhere in the Web page, but usually we put JavaScript code in included code is the JavaScript code, it will be directly executed by the browser. The second approach is to put the JavaScript code in a separate .js file and then in the HTML by introducing this file.Example one: Put it inside the head

Javascript has a bad reputation on the Internet, but it is hard for you to find another language that is so dynamic, so widely used, and so rooted in our lives. This article is translated from 5 Reasons Your Javascript Stinks. Javascript has a bad reputation on the Internet, but it is hard for you to find another language that is so dynamic, so widely used, and s

In JavaScript, all objects except the five primitive types (numbers, strings, Boolean values, null, and undefined) are objects. Therefore, I don't know how to continue learning objects? This article will share with you the in-depth study and summary of javascript objects. I. Overview An object is a composite value that aggregates many values (original values or other objects) and can be accessed through at

Main introduction: JavaScript reinforcement tutorial-JavaScript operator JavaScript Arithmetic Operator this article is an official HTML5 training tutorial for H5EDU institutions, mainly about: JavaScript reinforcement tutorial-JavaScript Operator

Almost every developer has development experience in object-oriented languages (such as C ++, C #, and Java. In traditional object-oriented languages, there are two very important concepts: classes and instances. Object-oriented and Object-basedAlmost every developer has development experience in object-oriented languages (such as C ++, C #, and Java. In traditional object-oriented languages, there are two very important concepts: classes and instances. Class defines the common behaviors and met

Understanding javascript prototype and closure (16)-conclusion and understanding javascript I used a total of 15 articles to prototype and closure javascript. First, javascript is "not easy to learn ". It is not how difficult it is, but the people who learn it often learn javascrip