SEARCH KEYWORD -- Exception handling
Java Cipher encryption/decryption example
In Java, Cipher is the API for doing data encryption/decryption. Many cryptographic algorithms such as AES, DES, RC4 etc can be specified when creating Cipher instance. The Cipher instance calls the underlying algorithm specific implementation to do the actual encryption/decryption. Before doing the encryption/decryption, a key needs to be created and it will be used to do the encryption/decryption. A sample program for performing all these is : import java.security.Key; import javax.cryp...
Java, Java Security, Cipher, Example, Sample 2015-08-14 07:07:10
Techies: Let's Not Forget Brain Hacking
Credit: SergeyNivens via Canva The world of cyber security never fails to surprise us with bolder and more sophisticated cyber-attacks and...
HACKING 2022-02-03 21:43:11
Set file permission in Java
Prior to Java 6, there is no good solution at the Java level to provide file permission management. You need to implement your own native methods or call the Runtime.exec() to invoke the system routine such as chmod in LInux. Since Java 6, Java introduces a set of methods which can be used to set the file permission at Java level. These methods include: File.setReadable(boolean); File.setWritable(boolean); FIle.setExecutable(boolean); File.setReadable(boolean, boolean); File.setWritable(bo...
JAVA, FILE PERMISSION, POSIX,learnjava 2015-08-29 03:37:37
Open Source Needs a New UI
As a freelance web developer, I’ve seen and used my fair share of open source web applications (and desktop software), and I’d like to point out something that I see all too often in open source projects: the user interface almost always lets the project down. Let me explain… The Problem I’ve used a considerable amount of open source software (web-based and desktop), and I feel that a large portion of them are let down by their UI. The functionality is brill...
Open source,Problem,UI,New paradign 2011-12-09 07:53:19
Why Programmers don’t have a High Social Status?
Up to date there is No single street name for a top programmer or computer scientist in any of the Top 20 most developed countries in the world during the last 60 years. There is no statue built in the center of a major city for a renown programmer or computer scientists. No “Presidential Medal†or “Congressional Gold Medal†has been awarded to a computer scientists or programmer. There is no nationally televised social reward ceremony for computer programmers and scie...
Propgrammer,Social status,Remember,Achievement 2012-01-04 02:43:05
Learning Ruby and Ruby vs Lisp
The company I work for has a lot of legacy Ruby code, and as Ruby has become kind of a mainstream language, I decided to get a book about it and learn how it works. As my learning resource, I chose The Ruby Programming language by David Flanagan and Yukihiro Matsumoto as that receives great customer reviews, covers Ruby 1.8.7 and 1.9 and is authoritative because the language creator is one of the authors. The book makes a good read in general. There are plen...
Ruby,Feature,Functional,OOP,Lisp,Difference 2011-12-12 07:42:01
Be careful when running knife vault command
While using Chef, one would frequently use knife commands which are used to manage resources on the Chef server. One can list all nodes, data bags, vault items and many other stuff on the Chef server. In this post, we would cover one command which may need your attention when using it -- knife vault. On Chef server, one can store data to data bags which can be accessed by registered clients. These data bags usually store the data in plain text format. In some cases, one would need to store data ...
KNIFE VAULT,KNIFE DATA BAG,CHEF-VAULT,CHEF 2017-08-19 00:26:54
NativeScript-Vue 1.0 Is Finally Out!
After a year of hard work and dedication, NativeScript-Vue 1.0 is finally available in the market. For those who are new to NativeScript- Vue, it is all about a plugin that simply allows one to build native iOS and Android apps with the help of Vue.js. NativeScript-Vue 1.0 is ready for use in production! And it may quite interest you to know that blending of NativeScript and Vue makes it even easier when it comes to building mobile apps. This launch comes with a shiny new website and extensive d...
JAVASCRIPT,HYBRID APP DEVELOPMENT,NATIVESCRIPT,VUE.JS,MOBILE APPLICATION 2018-02-26 00:14:03
A simple example on implementing progress bar in GoLang
Sometimes when handling a long running process, there would be need to track the progress so that people know something is still running instead of doubting something goes wrong. In this case, a progress bar which indicates the current status and progress would be desired. This post will show an example on how to implement progress bar using GoLang. Let's take a look at the final outcome first before jumping into the implementation detail. The key in the implementation is actually just the \r ...
TUTORIAL,EXAMPLE,GOLANG,PROGRESS BAR 2020-08-08 23:53:15
JavaScript's Two Zeros
JavaScript has two zeros: -0 and +0. This post explains why that is and where it matters in practice. The signed zero Numbers always need to be encoded to be stored digitally. Why do some encodings have two zeros? As an example, let’s look at encoding integers as 4-digit binary numbers, via the sign-and-magnitude method. There, one uses one bit for the sign (0 if positive, 1 if negative) and the remaining bits for the magnitude (absolute value). Therefore, -2 and +2 are encoded as f...
JavaScript,zeros 2012-03-24 05:21:49
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