Thursday, 3 January 2019

Speed up blog loading with AdSense lazy loads || How to Setup Lazy Load for Google AdSense Ad units || Lazy Load Setup for Google AdSense Ad units



Google AdSense is a monetization program executed by Google. This remains the most reliable way for many publishers to earn money online. One common problem faced by publishers is that Google AdSense affects the speed of our original blog. Because we have no control to customize resources, we feel unhappy.


Like YouTube video thumbnails, they should use WebP for ad unit images. It is ironic that sometimes they are not bothered to serve with GZIP compression, or do not minimize resources. Massive resources and additional burden of many DNS searches kill the speed of our page like hell.

A few months ago, when I tweeted the speed of the ad unit, I could not find a satisfactory answer. I came back with a solution that would prevent AdSense from slowing down its original content load.

Honestly, personally I am not a big fan of lazy cargo, even for images. But still, I just want to share an option. If you wish, you can try it once, if you are very concerned about the primary content service instead of the ad units.



Instruction for Setup Lazy Loading for AdSense
<script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<!-- leaderboard -->
<ins class="adsbygoogle"
 style="display:inline-block;width:728px;height:90px"
 data-ad-client="ca-pub-xxxxxxxxxxxxxxxx"
 data-ad-slot="1234567890"></ins>
<script>
(adsbygoogle = window.adsbygoogle || []).push({});
</script>

Technical details :

Basically, what happens when it is loaded asynchronously means that the browser continues to download adsbygoogle.js scripts without blocking the HTML analysis.

But here, in the slow loading method, I will convert the ASYNC method to the real DEFER. Once the main web page has finished loading, the AdSense script will start downloading into the browser. In this way, the visitor will not have to wait for Adsense to quickly see the entire page.

For this purpose, you do not have to make major changes to your ad unit. We will simply change the loading style of adsbygoogle.js that will do all the magic.

All you need to follow below two Steps


  • First of all, remove below script from all ad units.

<script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>


  • After then, add below JavaScript code in your Theme Footer, possibly just before the </body> tag
<!--noptimize-->
<script type="text/javascript">
function downloadJSAtOnload() {
var element = document.createElement("script");
element.src = "https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js";
document.body.appendChild(element);
}
if (window.addEventListener)
window.addEventListener("load", downloadJSAtOnload, false);
else if (window.attachEvent)
window.attachEvent("onload", downloadJSAtOnload);
else window.onload = downloadJSAtOnload;
</script>
<!--/noptimize-->


Wednesday, 18 April 2018

Java Basic Syntax || Basic Syntax In Java || Programmer Recruitment || Programmer Exam Notes In Java And C++




Java Basic Syntax :

When we consider a Java program, it can be defined as a collection of objects that communicate via invoking each other's methods. Let us now briefly look into what do class, object, methods, and instance variables mean.

Object - Objects have states and behaviors. Example: A dog has states - color, name, breed as well as behavior such as wagging their tail, barking, eating. An object is an instance of a class.

Class - A class can be defined as a template/blueprint that describes the behavior/state that the object of its type supports.

Methods - A method is basically a behavior. A class can contain many methods. It is in methods where the logics are written, data is manipulated and all the actions are executed.

Instance Variables - Each object has its unique set of instance variables. An object's state is created by the values assigned to these instance variables.

Popular Java Editors || Java Notes For Programmer Exam || Java And C++ Notes For Programmer Exam In Pdf || Programmer Recruitment Notes In Pdf



Popular Java Editors :

To write your Java programs, you will need a text editor. There are even more sophisticated IDEs available in the market. But for now, you can consider one of the following:

Notepad : On Windows machine, you can use any simple text editor like Notepad (Recommended for this tutorial), TextPad.

Netbeans : A Java IDE that is open-source and free, which can be downloaded from http://www.netbeans.org/index.html.

Eclipse : A Java IDE developed by the eclipse open-source community and can be downloaded from http://www.eclipse.org/.

Local Environment Setup In Java || Programmer Exams Java Language Notes In Pdf




Local Environment Setup In Java :

If you are still willing to set up your environment for Java programming language, then this section guides you on how to download and set up Java on your machine. Following are the steps to set up the environment.

Java SE is freely available from the link Download Java. You can download a version based on your operating system.

Follow the instructions to download Java and run the .exe to install Java on your machine. Once you installed Java on your machine, you will need to set environment variables to point to correct installation directories:

Setting Up the Path for Windows :

Assuming you have installed Java in c:\Program Files\java\jdk directory:

Right-click on 'My Computer' and select 'Properties'.

Click the 'Environment variables' button under the 'Advanced' tab.

Now,  alter  the  'Path'  variable  so  that  it  also  contains  the  path  to  the  Java executable. Example, if the path is currently set to 'C:\WINDOWS\SYSTEM32', then
change your path to read 'C:\WINDOWS\SYSTEM32;c:\Program Files\java\jdk\bin'.

Setting Up the Path for Linux, UNIX, Solaris, FreeBSD :

Environment variable PATH should be set to point to where the Java binaries have been installed. Refer to your shell documentation, if you have trouble doing this.

Example, if you use bash as your shell, then you would add the following line to the end of your '.bashrc: export PATH=/path/to/java:$PATH'

Tools You Will Need In Java || Which Tools We Need In Java || Programmer Recruitment || Programmer Notes Of Java In Pdf



For performing the examples discussed in this tutorial, you will need a Pentium 200-MHz computer with a minimum of 64 MB of RAM (128 MB of RAM recommended).

You will also need the following softwares:

Linux 7.1 or Windows xp/7/8 operating system Java JDK 8

Microsoft Notepad or any other text editor

This tutorial will provide the necessary skills to create GUI, networking, and web applications using Java.

History of Java || Complete History Of Java Language || Programmer Exams C++ Language Notes In Pdf


History of Java :

James Gosling initiated Java language project in June 1991 for use in one of his many set-top box projects. The language, initially called ‘Oak’ after an oak tree that stood outside Gosling's office, also went by the name ‘Green’ and ended up later being renamed as Java, from a list of random words.

Sun released the first public implementation as Java 1.0 in 1995. It promised Write Once, Run Anywhere (WORA), providing no-cost run-times on popular platforms.

On 13 November, 2006, Sun released much of Java as free and open source software under the terms of the GNU General Public License (GPL).

On 8 May, 2007, Sun finished the process, making all of Java's core code free and open-source, aside from a small portion of code to which Sun did not hold the copyright.

Java Complete Overview || Java Basic Knowledge || Complete Java Basic || Programmer Recruitment || Programmer Exam Notes In Java And Css



Java Complete Overview :

Java programming language was originally developed by Sun Microsystems which was initiated by James Gosling and released in 1995 as core component of Sun Microsystems' Java platform (Java 1.0 [J2SE]).

The latest release of the Java Standard Edition is Java SE 8. With the advancement of Java and its widespread popularity, multiple configurations were built to suit various types of platforms. For example: J2EE for Enterprise Applications, J2ME for Mobile Applications.



The new J2 versions were renamed as Java SE, Java EE, and Java ME respectively. Java is guaranteed to be Write Once, Run Anywhere.

Java is :

Object Oriented : In Java, everything is an Object. Java can be easily extended since it is based on the Object model.

Platform Independent : Unlike many other programming languages including C and C++, when Java is compiled, it is not compiled into platform specific machine, rather into platform independent byte code. This byte code is distributed over the web and interpreted by the Virtual Machine (JVM) on whichever platform it is being run on.

Simple : Java is designed to be easy to learn. If you understand the basic concept of OOP Java, it would be easy to master.

Secure : With Java's secure feature it enables to develop virus-free, tamper-free systems. Authentication techniques are based on public-key encryption.

Architecture-neutral : Java compiler generates an architecture-neutral object file format, which makes the compiled code executable on many processors, with the presence of Java runtime system.

Portable : Being architecture-neutral and having no implementation dependent aspects of the specification makes Java portable. Compiler in Java is written in ANSI C with a clean portability boundary, which is a POSIX subset.

Robust : Java makes an effort to eliminate error prone situations by emphasizing mainly on compile time error checking and runtime checking.

Multithreaded : With Java's multithreaded feature it is possible to write programs that can perform many tasks simultaneously. This design feature allows the developers to construct interactive applications that can run smoothly.

Interpreted : Java byte code is translated on the fly to native machine instructions and is not stored anywhere. The development process is more rapid and analytical since the linking is an incremental and light-weight process.

High Performance : With the use of Just-In-Time compilers, Java enables high performance.

Distributed : Java is designed for the distributed environment of the internet.

Dynamic : Java is considered to be more dynamic than C or C++ since it is designed to adapt to an evolving environment. Java programs can carry extensive amount of run-time information that can be used to verify and resolve accesses to objects on run-time.

How To Execute Java Online | How Can Use Try It Option In Java Script On Website


Execute Java Online :

For most of the examples given in this tutorial, you will find a ‘Try it’ option, which you can use to execute your Java programs at the spot and enjoy your learning.

You really do not need to set up your own environment to start learning Java programming language. Reason is very simple, we already have Java Programming environment setup online, so that you can compile and execute all the available examples online at the same time when you are doing your theory work. This gives you confidence in what you are reading and to check the result with different options. Feel free to modify any example and execute it online.

Try following the example using the ‘Try it’ option available at the top right corner of the following sample code box −


public class MyFirstJavaProgram {


public static void main(String []args) {

System.out.println("Hello World");

}

}



For most of the examples given in this tutorial, you will find the Try it option, which you can use to execute your programs and enjoy your learning.

We have provided you with an option to compile and execute available code online. Just click the Try it button avaiable at the top-right corner of the code window to compile and execute the available code. There are certain examples which cannot be executed online, so we have skipped those examples.

There may be a case that you do not see the result of the compiled/executed code. In such case, you can re-try to compile and execute the code using execute button available in the compilation pop-up window.