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JavaScript learning Notes: Data Types and javascript learning notes
I. Classification
Basic data types: undefined, null, string, Boolean, and number
Complex data type: object
Object Attributes are defined in the form of unordered names and value pairs (name: value ).
Ii. Details
1. undefined: Undefined type has only on
Built-in objects of JavaScript learning notes, and javascript learning notes
JS Window
Window object: http://www.w3school.com.cn/js/js_window.asp
All browsers support window objects. It indicates the browser window.
All JavaScript global objects, functions, and variables are
JavaScript learning notes _ simple implementation of enumeration types, playing card applications, javascript learning notes
As follows:
// Implement the Enumeration type. the playing card application function creatEnum (p) {// constructor var Enumeration = function () {throw 'can not Instantiate Enumerations ';}; // r
Operations in the drop-down box of JavaScript learning notes and javascript learning notes
There are a lot of operations on the drop-down box. In the past few days, the project needs to be summarized.
I. Dynamic build option
Sometimes we need to dynamically construct the values in the drop-down box. here we need to use
JavaScript learning notes operator (continued), javascript learning notes
I. Multiplication Operators
1. Multiplication :*
Special rules for multiplication operators:
If the operands are all numeric values, they are calculated by regular multiplication. If the product exceeds the range indicated by the ECMAscript value
Learning javascript object-oriented understanding javascript objects and javascript object-oriented
I. Programming ideasProcess-oriented: process-oriented, step-by-step Refinement from top to bottom. The program is regarded as a set of function calls.Object-oriented: Objects Act as the basic unit of a program and are d
JavaScript.This directory has 15 key topics, as shown below. They are learning guides, newcomers, Webpack, performance, basic concepts, functional programming, interviewing, tutorial cases, Async Await, concurrency, V8, machine learning, data visualization, debugging, and unit testing.Guide
Modern-js-cheatsheet: A memo list of JavaScript knowledge often
Other website development related information Super HTML and xhtml,css Quality learning materials Download SummaryLatest HTML5 and CSS3 resources Download SummaryDreamweaver Tutorial RollupIndex:
JavaScript Beginner and Reference essentials
JavaScript Advanced Step
AJAX (asynchronous JavaS
JavaScript learning Summary-tips, practical functions, concise methods, programming details, javascript details
Sort out some JavaScript skills, practical functions, and common function implementation methods for reference only
Variable Conversion
//edit http://www.lai18.com var myVar = "3.14159",str = ""+ myVar,
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
In this article, I will introduce six thinking skills to help you learn JavaScript faster and become a happier and more productive programmer. When we are learning JavaScript or any other coding skills, it is often because of these obstacles:
Some concepts may cause confusion, especially when you switch from other languages.
Cannot find time (sometimes moti
。。 For Web pages, JavaScript everywhere, for the poor English people it is simply a nightmare of existence, but the form of forced to start learning today! I hope I can stick to it.From where to start, my goal is from the Think big, from the application focus, not the details, anyway the details can not remember, to use when the key.Although programming is a layman, it also accumulates some common sense, so
This article mainly introduces eight mind maps for learning the JavaScript programming language, this article provides the mind map of javascript variables, javascript operators, javascript arrays, javascript flow statements,
JavaScript-learning notes for Object-based scripting language (I), javascript scripting language1. Two js embedding MethodsUse a javascript prefix to construct a url: Place js scripts between :
2. If no declared variables are used directly, the following error occurs: ReferenceError: x is not defined.
If no value is d
Learning the state mode of the JavaScript design mode and the javascript Design Mode
The key to the state pattern is to distinguish the state inside a thing. Changes in the state inside a thing often lead to changes in the behavior of the thing.
When the light is on, press the switch, the light will switch to the off state, and then press the switch again, the li
Hello World:Good morning everyone, the so-called spring, set off. Starting today to learn the third edition of Advanced programming the second time before the lightning-fast trend of a cursory glance, but nothing to remember that has been forgotten almost. Haha, originally I am not Huang Rong, also is not a genius, or that sentence good memory is inferior to the written word. The third edition of this study, advanced programming, is targeted and purposeful. So I will record each chapter of
JavaScript learning-improve
1. Objects in JavaScript.
Objects in JavaScript are a collection of key-values of a set of data, which is somewhat similar to HashMap in Java. All the data is the property of the Object. generally, an object created in JavaScript is implemented u
. However, the anonymous function can be run as follows:Anonymous functions cannot be called by function names, but anonymous functions can be run indirectly through pointers, for example:In the example, the first line, the Anonyobject object, points to an anonymous function. The object is based on the window namespace, so the contents of the anonymous function can be called through lines 10th and 14th. Note that the anonyobject here is an object that is not the same as the following function:In
variable declared in the getNameFunc function also exists in the memory. If yes, you can continue to use it. 24 */25 return that. name; // that indicates the object, so that. the access by name is naturally the object name "My Object" 26}; 27 28} 29 30}; 31 var retFn = object. getNameFunc (); // After the getNameFunc method is called, an anonymous method is returned. In this case, retFn indicates an anonymous method, now it is equivalent to giving the anonymous method a name called retFn32 aler
In actual business scenarios, the maximum or minimum values in the array must be retrieved. However, arr. max () and arr. min () are not provided in the array. Can this method be implemented in other ways? So today, let's sort out some methods of the maximum and minimum values in the array. Let's take a look at them.
Recommended reading:Add, delete, modify, and query the array of JavaScript learning notes
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