JavaScript

Definition of a heap The maximum (minimum) heap is a tree of key values for each node whose key value is not less than (greater than) its child (if present). The Big top pile is a completely binary tree, but also a tree. The small top heap is a

I. about JavaScript variable declarationsIn JavaScript, declare a variable var a=1; can also be directly A=1; There is a difference between the two expressions, One is the local variable of the current scope and the other is the global variable of

below to introduce you to the next JS implementation of the Right button menu function, the details are as follows: The issues addressed in this chapter 1, the realization of the right key menu function code. 2, prevent the actual application of

Problem description This period of time in the need to do the PM when suddenly found a problem, products on the image from a number of third parties, the specific size can not be determined, if directly in the style of the image of the size of the

Puppy Favorites Conversion Pinyin only Sort [Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform]

Overview The hasOwnProperty () method is used to determine whether an object contains a specified own property. GrammarObj.hasownproperty (prop) Parameters prop • The name of the property to be instrumented. Describe All objects inherited

However, the two functions are asynchronous, and the code behind them will continue to execute during the timing. Then write your own sleep () function, the Internet also spread some implementation methods, but I found the following method is simple

Turn from: http://www.ajaxjs.com/yuicn/bbs/ShowPost.asp?ThreadID=6 2006-10-18 @ 07:59:29 Author volcano Javascript memory leaks are not too scary. It will only quietly, slowly drag your browser to the very slow, let you angry outraged, lambaste

Introduced A prototype pattern (prototype) is a prototype instance that points to the kind of object being created and creates a new object by copying the prototypes. Body In the case of prototyping, we can use JavaScript-specific prototypes to

Introduced The template Method (Templatemethod) defines the skeleton of an algorithm in an operation and delays some steps into subclasses. Template methods enable subclasses to redefine certain steps of the algorithm without altering the structure

Introduced The policy pattern defines the algorithm family, which is packaged so that they can be replaced by each other, and this pattern allows the algorithm to change without affecting the client using the algorithm. Body Before we understand

The use of the three functions of Call,apply,bind is a point of learning that the language of JavaScript cannot be crossed. I'm going to take a good look at them. The use of each of these three, and common application scenarios. First look at call

Then there should be BOM and HTML5, but given the new changes in ECMAScript5 relative to ECMASCRIPT3, and these changes are also very interesting, so in this article I think of the interesting changes (not all changes) to focus on, but here is just

Examples of HTML used in this verse Copy Code code as follows: Project A Project Two Project Three 1. Create an element node The Document.createelement () method is used to create an element that accepts a

Copy Code code as follows: Detecting non-IE browser plug-in functions function Hasplugin (name) { Name = Name.tolowercase (); for (Var i=0 i if (Navigator.plugins[i].name.tolowercase (). IndexOf (name) >-1) { return true; } } return

1. Timeout call settimeout () The settimeout () method accepts two parameters, the first parameter is a function, the second parameter is the time (in microseconds), and returns the value ID Copy Code code as follows: settimeout

1. Window Position The following gets the position of the browser window from the left and top of the screen Copy Code code as follows: var leftpos = (typeof Window.screenleft = "number")? Window.screenLeft:window.screenX; Left

1. Function Internal Property arguments Arguments is used to hold the parameters of the function, Arguments.callee point to the function that owns the arguments object Copy Code code as follows: Factorial function factorial (num) {

Today, I found a corner that never noticed before, I believe I can greatly improve my writing JS speed. can quickly detect errors. For example, today's overtime is an example of debugging a JS error discovery. 　　1, Google Browser reported the

Vaguely remember, in learning C language library functions, many string operations related to the function will return the result-related pointers. In fact, this return value is very often not very necessary, because in our incoming parameters, ten