Meanwhile you are coding and you want to stop the execution of the code at any specific point, you just add to your code the following statement:
debugger;
The debugger statement invokes any available debugging functionality, such as setting a breakpoint. If no debugging functionality is available, this statement has no effect.
Source: MDN Web Docs
Common confusion right? Let’s see:
Source: StackOverflow
URIs are a standard for identifying documents using a short string of numbers, letters, and symbols. They are defined by RFC 3986 – Uniform Resource Identifier (URI): Generic Syntax. URLs, URNs, and URCs are all types of URI.
Contains information about how to fetch a resource from its location. For example:
http://example.com/mypage.htmlftp://example.com/download.zipmailto:user@example.comfile:///home/user/file.txttel:1-888-555-5555http://example.com/resource?foo=bar#fragment/other/link.html (A relative URL, only useful in the context of another URL)URLs always start with a protocol (http) and usually contain information such as the network host name (example.com) and often a document path (/foo/mypage.html). URLs may have query parameters and fragment identifiers.
Identifies a resource by a unique and persistent name, but doesn’t necessarily tell you how to locate it on the internet. It usually starts with the prefix urn: For example:
urn:isbn:0451450523 to identify a book by its ISBN number.urn:uuid:6e8bc430-9c3a-11d9-9669-0800200c9a66 a globally unique identifierurn:publishing:book – An XML namespace that identifies the document as a type of book.URNs can identify ideas and concepts. They are not restricted to identifying documents. When a URN does represent a document, it can be translated into a URL by a «resolver». The document can then be downloaded from the URL.
Points to meta data about a document rather than to the document itself. An example of a URC is one that points to the HTML source code of a page like: view-source:http://example.com/
Rather than locating it on the internet, or naming it, data can be placed directly into a URI. An example would be data:,Hello%20World.
There are millions of times where while we are coding we need to generate a random number. The most of the times we need it as an Integer, to get some value (position) from an array.
Here you are how to generate a random number! For more info about how does the method works, visit the SO link! Enjoy!
Source: StackOverflow
@Author: Ionuț G. Stan
/**
* Returns a random number between min (inclusive) and max (exclusive)
*/
function getRandomArbitrary(min, max) {
return Math.random() * (max - min) + min;
}
/**
* Returns a random integer between min (inclusive) and max (inclusive)
* Using Math.round() will give you a non-uniform distribution!
*/
function getRandomInt(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
}
The web.xml is a configuration file to describe how a web application should be deployed. Here’re 5 web.xml examples, just for self-reference.
1. Servlet 3.1 deployment descriptor
Java EE 7 XML schema, namespace is http://xmlns.jcp.org/xml/ns/javaee/
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> </web-app>
2. Servlet 3.0 deployment descriptor
Java EE 6 XML schema, namespace is http://java.sun.com/xml/ns/javaee
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> </web-app>
3. Servlet 2.5 deployment descriptor
Java EE 5 XML schema, namespace is http://java.sun.com/xml/ns/javaee
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"> </web-app>
4. Servlet 2.4 deployment descriptor
J2EE 1.4 XML schema, namespace is http://java.sun.com/xml/ns/j2ee
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4"> <display-name>Servlet 2.4 Web Application</display-name> </web-app>
5. Servlet 2.3 deployment descriptor
J2EE 1.3 DTDs schema. This web.xml file is too old, highly recommend you to upgrade it.
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app> <display-name>Servlet 2.3 Web Application</display-name> </web-app>
Source: Mkyong.com
Here you have a list of «the very best» of Javascript, made by the JS expert Ustun Ozgur:
The first three are the classic ones, the other next three are free and you can download o read online. Finally, you have the big JS reference made by Mozilla.
Enjoy JavaScript ninja!
The JavaScript files are one of the many things that are downloaded while loading a website. So reduce size of it it will bring benefits to your website loading time.
JSCompress.com is an online javascript compressor that allows you to compress and minify your javascript files. Compressed javascript files are ideal for production environments since they typically reduce the size of the file by 30-90%. Most of the filesize reduction is achieved by removing comments and extra whitespace characters that are not needed by web browsers or visitors.
Plus, if you want to hide or mask your source code from others, this is the way to make it unreadable
There are a number of reasons why compressing your javascript files is a good idea:
Source: JSCompress.com
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