People are often confused by this guy when using JavaScript. For most developers with OOP development experience This is an identifier that refers to a common element in the current scope, but it is quirky in JavaScript because it is not fixed, but
Previously in Yuber GitHub issues saw the use of JS detection of CPU usage, feel very good.
In particular, the implementation of a bit, plus a histogram of the function can be intuitive to see the situation of CPU utilization.
See the effect:
Before we begin our formal presentation, we'd like to look at the JavaScript promise:
Copy Code code as follows:
var p = new Promise (function (resolve, reject) {
Resolve ("Hello World");
});
P.then (function (str) {
alert
The sleep function is not available in JavaScript, and we use this feature for the length of time.
One idea is to run a cycle of the body, so that the program consumed CPU time to achieve delay. This has a problem, the different machine CPU
Sample Example:
Less nonsense, directly on the code:
Arrow.js
/** * To achieve the function of two-point arrow @author mapleque@163.com * @version 1.0 * @date 2013.05.23/;(function (window,document) {if (
window.mapleque==undefined) window.
Original topic:
Given a sequence of unordered integers, find the longest sequence of consecutive digits.
For example:
Given [100, 4, 200, 1, 3, 2],
The longest sequential number sequence is [1, 2, 3, 4].
The solution to the side dishes:
This article summarizes the various operations common to JavaScript, including string, time, form, regular validation, and so on. Has a very high reference value. Share for everyone to use for reference. The specific method is as follows:
/****
Some students will say that you can use the source code search method. Indeed, for a relatively simple page, this method often works. However, for pages that make up a relatively complex page, such as a page that embeds many script files and
I. Preamble
I've always liked it. Win8 wait for the prompt Circle progress bar. Win8 just come out that will, feel good magic! There was no thought at the time, not to study. Through the recent online look for information, finally to get out! First
Observer mode (also known as publisher-Subscriber mode) should be one of the most common patterns. are used in a lot of languages. Including the DOM events we normally touch. It is also an observer pattern implemented between JS and Dom.
Multiplying floating-point numbers in JavaScript is a fun thing to do.
There are many ways to multiply floating-point numbers, and here's a solution that I think is good for me:
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function fxf (f1, F2) {
F1 + = ';
A recent project, using JavaScript to manipulate Excel to generate reports, below is an example of a detailed annotation
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ziyuanweihu
Card
SetTimeout is often used to delay execution of a function:
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settimeout (function () {
...
}, timeout);
Sometimes the settimeout (function...,0) is used for asynchronous processing, for example:
From Mozilla Aurora 11, Firefox has implemented some new features, one of which is the basic implementation of the battery state interface. This simple interface can provide you with information about the current battery charge, whether it is
1. Convert numbers to Strings
A. To convert a number to a string, simply add an empty string to it:
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var n = 100;
var n_as_string = n + "";
B. To make the number more explicitly converted to a
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Url:
PHP detects URL address validity
The code is as follows
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?
function Is_url ($STR) {
Return Preg_match
Use JavaScript to take float type two digits after the decimal point, example 22.127456 to 22.13, how to do?
1. This method is least recommended:
function Get () {
var s = 22.127456 + "";
var str = s.substring (0,s.indexof (".") + 3);
alert
Closures are functions that have access to variables in the scope of another function, but the scope configuration mechanism has a need to note that closures can only take the last value that contains any variable in the function.
such as the
Detects whether the current window is closed before the current window closes
In IE9, if the document is refreshed, Unloadform and onbeforeunload will execute, and if the page is closed, only the onbeforeunload event will be executed
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