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  Web Design 101: Get Your Color Contrasts Right

Great web design is hard.  It requires imagination, a keen eye, and the ability to project ideas onto a, generally digital, medium.  In today’s world this calls for a conflation of both artist and technologist.  I am not one of these people. I am a technologist, but I am no artist (thankfully I know some great artists!). Nonetheless, I’ve always had a good eye for things that look good and for sites that look like they were built with an early version of Micro...

   Web design,Structure,UI,Contrast     2012-02-04 21:42:50

  Generate certificate from cert file in Java

A certificate is often used to prove the identity of a server. The certificate will contain information such as the subject and issuer of the certificate. It will also contain the validation date of the certificate. A certificate is often exported to an external cert file which is transferred over the internet. We will often see its use in SSL communication which provides secure communication between two entities. In this post, we will show how to read the data from an external certificate file ...

   PKCS12,CertificateFactory,Example,Java,X509     2015-06-08 06:47:05

  C/C++ Pointer Declaration Syntax – It makes sense!

I never really liked the way pointers are declared in C/C++: int *a, *b, *c; // a, b and c are pointers to int The reason is that I am used to reading variable declarations as MyType myVar1, myVar2, myVar3; and I always read “int*” as the type “integer pointer”. I therefore wanted the following int* a, b, c; // a is a pointer to int, b and c are ints to mean that a, b and c all were of type int*, i.e. pointers to int. and I therefore found it slightly a...

   C,Pointer,Declaration,Attempt     2012-02-22 05:43:58

  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

  The Book That Every Programmer Should Read

No, it’s not Knuth’s “The Art of Programming”. I’m talking about quite an easy-to-read (compared to TAoP) book, which, in fact, does not require any engineering or mathematical background from the reader.I am talking about C. Petzold’s “CODE”. It is a truly remarkable book about how computers work. Let me explain why I think this book is so awesome.The book starts from the very beginning, from explaining what code is, bringi...

   Programmer,Book,Must read,CODE,C. Petzold     2011-10-31 10:43:58

  Fix could not read Username for 'https://xxx.com': terminal prompts disabled

Recently was working on a project which needed to build a docker image, but unfortunately it kept failing as below error was seen. fatal: could not read Username for 'https://xxx.com': terminal prompts disabled Based on the error, it looked like it was trying to pull code from remote Gitlab repository but failed as the terminal prompt is disabled. At first glance, have a doubt why it needs terminal prompt to be enabled? It should just succeed and without prompting for anything. The only reason...

   GIT,TERMINAL PROMPTS DISABLED,DOCKER     2020-12-13 04:43:12

  30-Minute Exercise to Become a Better Programmer

I believe that motivation is really important. That’s why from time to time I read books about time management (as they motivate me to be focused and continue evolve my TM-system) and books about software craftsmanship. The other day I finished one of this kind of books - “Apprenticeship Patterns: Guidance for the Aspiring Software Craftsman”. This book motivated me to think carefully what I want to invest my time in. Also, it coincided with my 25th birthday and, of co...

   Programmer,Exercise,Skill,Requirements     2012-01-28 07:21:13

  Easy Ways To Make Sure Your Website Is Ready For Mobile First Users

Websites are no longer a novelty or a useful complement to a brick and mortar store. They are an essential part of everyday life. The average American is spending up to ten hours every day online.   Businesses exist solely online, entrepreneurs with great ideas can start up online with very little help and even the most casual of users know what looks good. Consumers aren’t likely to forgive mistakes. If your website isn’t completely user-friendly, they know they ...

   SEO,MOBILE SEO,MOBILE DEVELOPMENT,MOBILE USABILITY     2018-09-17 03:57:15

  Cache Reheating - Not to be Ignored

An important aspect to keep in mind with databases is the cost of cache reheating after a server restart. Consider the following diagram which shows several cache servers (e.g., memcached) in front of a database server.This sort of setup is common and can work quite well when appropriate; it removes read load from the database and allows more RAM to be utilized for scaling (when the database doesn’t scale horizontally). But what happens if all the cache servers restart at the same time, s...

   Database,Cost,Cache reheating,Advice     2011-09-21 09:47:29

  Work with MySQL character set and collation

For non-English websites, they often have to deal with character set and collation if they want to store data to and read data from databases with other languages. Character set tells the database which kind of character encoding scheme to use to store or read data, collation can be simply understood as a subset of character set, it tells the database how to sort data. We talk about working with character set and collation of MySQL today.  In MySQL, if we want to store Chinese, Japanese or ...

   MySQL,character set,collation,Chinese,question mark     2012-06-17 07:07:28

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