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  Java Polymorphism and Overriding Methods

Most Java developers will be familiar with polymorphism – we’ve all seen the example of the Dog and Cat classes inheriting from some abstract Animal class and having their say() methods produce different results. But it’s still worthwhile to look at a few simple examples to reinforce the concepts.First, we define a simple class with one instance method and one static method.public class A { public String getName() { return "I a...

   Java,Overriding,Polymorphism,Demo,Dynami     2011-10-04 14:09:06

  Collection Of Puzzles For Programmers

Did you know that we have a nice collection of puzzles here on less than dot? Some are harder than others so there is something for everyone. You can pic any language you want, you will see that there are solutions in Ruby, Python, Visual Basic, SQL, JavaScript, C++ and other. Here is a partial list of what we have Friday the Thirteenths The goal is to identify all friday the thirteenths for a given timeframe Regular Pentagon Given a grid co-ordinate (x,y) as the centre point of a regu...

   Programming puzzle,Fibonacci,Prime,ASCII     2012-01-04 08:06:18

  The tips of learning Linux kernel

  As the Linux kernel has become one of the most gigantic and complex software project in the world, its complication scare many novices away. In this post, I will give some personal experience on how to learn Linux kernel, and hope these tips can offer some help to newcomers. (1) Download vanilla kernel and install it. Yes, I suggest you can find a physical machine, or if you really don’t have one at hand, virtual machine is also OK. Download the newest vanilla k...

       2017-07-28 22:53:11

  Go 1.16 is released

Note: The post is authorized by original author to republish on our site. Original author is Stefanie Lai who is currently a Spotify engineer and lives in Stockholm, original post is published here. Last week, Go1.16 was released, bringing relatively more changes than version 1.15, which was influenced by the epidemic. The update is in many aspects, including compilation, deployment, standard library, etc. In the official Go document, all changes are classified based on Too...

   GOLANG,GO1.16,NEW FEATURES     2021-02-26 21:08:42

  PHP buffer: output_buffering and ob_start

buffer is one piece of memory section, it is usually 4Kb in Linux. It is mainly used between different devices with different speed or different priorities. With buffer, the waiting time between different processes will be reduced. Here is one simple example, when you type something in a text editor, every time when you type a character, the operating system will not write it to the disk directly, instead it will write it to buffer first When the buffer is full, the data in the buffer will be wr...

   PHP buffer,output_buffering,ob_start     2013-06-20 22:54:15

  Guide to Implement an SSH Client Using Golang

SSH, short for Secure Shell, is a network protocol used for securely remote logging into other computers on a network. I believe most backend developers are familiar with SSH. Common shell tools used for logging into servers, such as Xshell, SecureCRT, and iTerm2, are all based on the SSH protocol. In Golang, the crypto/ssh package provides functionality for implementing an SSH client. In this article, we will explain in detail how to implement an SSH client using Golang. Creating SSH Client Con...

   SSH CLIENT,GUIDE,SSH,GOLANG     2023-11-11 09:19:29

  10 Ways to Be a More Productive Web Developer

We could all be more productive. There are many things we can do — some big, some small — that will enhance the way we work and improve the outcomes of our activities.Although I can’t promise that I’ll be able to help you cure all your productivity ailments, I do hope that I can provide you with a few useful, solid tips on streamlining your web development workflow and making every part of the development cycle move quickly and smoothly.Follow each one of these tips a...

   Ways,Efficiency,Web development,API,Fram     2011-09-26 11:25:29

  Hackers vs. Coders

Photo Credit: Pranav MistryBeing a good hacker is an invaluable skill. But is being a coder the same as being a hacker? Is it possible that coders are at a creative disadvantage to hackers who don’t know how to code?Here’s a story that helped me see the difference.I was recently invited to mentor at Startup Weekend. On Friday night, we gathered to eat pizza, pitch ideas, create teams and discuss launch plans. At the end of the day, everyone was feeling great about what theyâ...

   Hacker,Coder,Comparison,Innovation     2011-05-11 02:11:09

  It’s Not Too Late to Learn How to Code

Coding is sort of like a superpower; with it you can create things that millions of people see. You can change the way people behave, the way they think, and the way they interact with others. This is beyond awesome, but I’ve also met a lot of people that think that this ability is inaccessible to them. I’ve met a lot of “non-technical” people who seem to think that this superpower is only bestowed on those fortunate enough to have it come easily to them at a very early...

   Tips,Coding,Preparation,Interest     2011-10-17 11:26:38

  Consistency between Redis Cache and SQL Database

Nowadays, Redis has become one of the most popular cache solution in the Internet industry. Although relational database systems (SQL) bring many awesome properties such as ACID, the performance of the database would degrade under high load in order to maintain these properties. In order to fix this problem, many companies & websites have decided to add a cache layer between the application layer (i.e., the backend code which handles the business logic) and the storage layer (i.e., the SQL d...

   REDIS,CACHE,DATABASE     2019-07-07 08:14:16

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