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  var in JavaScript

Geoff published an article sometime ago--"How one missing var ruined our launch". This article described one case where MelonCard uses Node.js as their backend system, suddenly there was a small registration peak period--50-100 people registered concurrently, then the entire website stopped responding and many other strange problems showed up. When they were investigating the source of the problem, they found one missing var in the following code.app.all(‘/apps/:user_id/status’, fun...

   JavaScript,Scope,variable     2012-05-26 12:35:36

  My love… for Expressive Programming Languages

I started out my journey with programming as a teenager learning GW-BASIC. Soon I learnt C language followed by C++.  I was impressed with the OO syntactic constructs C++ had on offer but I felt a little uneasy with a few constructs such as the scope resolution. I started studying Java. It immediately caught my attention with the syntactic improvements and simplifications it brought over C++. I was still in academics, so learning(precisely trying) programming languages on su...

   descriptive,programming,language,prefere     2011-08-17 07:31:09

  Is coding going to die?

There is always a voice recent years saying that coding will gradually die, software development is more like an assembly job. i.e, programmer will be more and more like IT engineers. They seldom build something from scratch, instead they achieve the goal by assemble different components. There are people who have similar views around me. From the book "Clean code" written by Robert C Martin-- "One might argue that a book about code is somehow behind the times—that code is no longer...

   Coding,Clean code,Disappear,Analysis     2012-03-15 14:37:35

  Do you have this kind of comments in your source code?

Writing runnable code is the essential skill of a programmer, writing understandable comment is also a skill a programmer should acquire. There is some famous saying that bad comment is worth than no comment. Usually your code will be maintained by other people, if you provide them some difficult to understand or misguided comments, this will be nightmare to them. While at some other time, programmers may put some funny comments in their codes which may make others laugh. Today we...

   COMMENT,HUMOR     2016-08-01 10:25:14

  HTML5 Video and DRM

Many people call HTML5 an Adobe Flash replacement and I agree. Adobe already discontinued Flash on mobile devices. So HTML5 Video is a must for video on mobile phones and tablets. On the desktop Flash Video players are used more than HTML5 Video players but HTML5 video will work with a current web browser on a site that supports HTML5 video. Commercial video sites like YouTube will play partnered content in Flash even if you turned on HTML5 video at http://www.youtub...

   HTML5 Video,Flash,DRM,Comparison     2012-02-05 07:18:23

  Java 9 release is delayed again

The original Java 9 planned release date is March 2017. But latest source shows that Java 9 release will be delayed again to July 2017. It's four months later than the planned date. Oracle Chief Architect of Java Platform group Mark Reinhold proposes this new release date in a message sent on the OpenJDK mailing list.  Despite this progress, at this point it's clear that Jigsaw needs more time. We recently received critical feedback that motivated a redesign of the module ...

   JAVA,RELEASE DATE,JAVA 9,JAVA 9 DELAY     2016-09-26 12:22:53

  PHP to Objective C, where the f**k are parameters?

Javascript, PHP, Ruby functionsI assume you are very familiar with declaring functions in any of the languages above, if not, you should not be reading this. Let’s begin with a simple function to send email in these languages:// PHP or Javascript do_send_email (recipient, cc, subject, body); // Ruby do_send_email (recipient, cc, subject, body)So it’s clear by looking at the function’s signature that it takes 4 parameters and they could be optional, depends on your imple...

   Objective-C,PHP,JavaScript,Parameter,Function name     2012-01-16 09:46:09

  The new Surface RT may use Qualcomm Snapdragon processor

According to Sina Tech, Microsoft will launch its new Surface RT tablet equipped with Qualcomm processor . The source said, some of the new Surface RT will use Qualcomm Snapdragon processor, this processor will provide faster wireless data connection speed. The current Surface RT uses Nvidia's Tegra processor. Some versions of the Surface RT will continue to use Tegra processor. By adding Qualcomm processor as another option, Microsoft will further expand Surface RT function. Despite Microsoft h...

   Surface RT,Qualcomm,Processor     2013-06-19 08:11:03

  Why using + to concatenate string in Java loop is not a good option

String concatenation is a common operation in Java programming. It is to concatenate multiple strings into a single string. Java provides a String class which is an immutable class which means the object cannot be mutated once instantiated. Once a String object is instantiated, its properties cannot be changed anymore, so when concatenating strings, it's actually create a new String instance to store the concatenated string values. For example, below is a simple string concatenation example. Str...

   JAVA,STRING,JAVA 8     2019-01-18 22:07:12

  Convert number to string in C++

Prior to C++11, there is no built-in function in C++ standard library which can be used to convert numbers such as interger and double number to string.  There are many ways which can convert number to string. Since C++ is C compatible, we can use itoa() function to convert an integer to C style string. But this one can only convert integer to string, not double. For different types of numbers, we need to use different functions. string s = string(itoa(a)); Actually, we can also use strings...

   C++,conversion,number,string     2012-08-14 15:52:48

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