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  When to use STDERR instead of STDOUT

Every process is initialized with three open file descriptors, stdin, stdout, and stderr. stdin is an abstraction for accepting input (from the keyboard or from pipes) and stdout is an abstraction for giving output (to a file, to a pipe, to a console). That's a very simplified explanation but true nonetheless. Those three file descriptors are collectively called 'The Standard Streams'. Where does stderr come from? It's fairly straightforward to understand why stdin and stdout exist, however ...

   UNIX,STDERR,STDOUT,Difference     2012-01-14 12:07:43

  SOME LESSONS LEARNED

Note: Google was kind enough to invite me to give a short talk at their Zeitgeist conference earlier this week. It was a really interesting conference and I got a chance to meet a lot of people I admire. For my talk, I decided to use material from some of my blog posts over the years that I thought might appeal to a broader audience. Unfortunately, I was still recovering from a nastly cold/flu so I didn’t deliver the talk as well as I’d like.  Below is the text.Today, I wanted...

   Investor,Startup,Lesson,Experience,Investment     2011-10-12 11:47:02

  As A Hottest Job Ever, What Should You Know As A Front End Web Developer?

The front end web developers are the openers for the visitors to visit the web page. It is also known as the client-side development, works predominantly with HTML, CSS, and Javascript. The tools and techniques are the important players of the front end web development. The developer must be aware of the updation of web technologies.The scope is evergreen with this technology as every company or business needs a website to showcase their profile. There are many objectives must be measured while ...

   FRONT END DEVELOPER,WEB DEVELOPERS,SOFTWARE DEVELOPERS,TOP SOFTWARE COMPANIES     2019-08-12 05:36:28

  Writing forward-compatible websites

This is a list of best practices for creating websites that do not break when browsers are updated. It's not always possible to follow all of these, but following as many of them as possible will help future-proof your website. This is especially important for intranet applications and other non-public websites where problems are likely to not be noticed during testing by browser vendors.JavaScriptPrefix all global variable access in onfoo attributes with “window.”When an e...

   Web design,Forward compatible,CSS,JavaScript,window     2011-11-23 08:07:35

  Optimization Tricks used by the Lockless Memory Allocator

With the releasing of the Lockless Memory Allocator under the GPL version 3.0 license, we can now discuss more of the optimization tricks used inside it. Many of these are things you wouldn't want to use in normal code. However, when speed is the ultimate goal, sometimes we need to break a few rules and use code that is a little sneaky.The SlabA slab is a well-known technique for allocating fixed size objects. For a given object size, a chunk of memory is divided up into smaller regions of that ...

   Optimization,Memory allocation     2011-11-16 08:02:16

  Why there is white/blank space instead of AdSense ad on my website?

Usually if you see on your website a white/blank space instead of Adsense ads, this means that Adsense cannot show adds in that unit for some reasons (we are going to talk about possible reasons below) and also you have enabled the “Fill space with a solid color” feature (in the “Choose what to display if no relevant ads are available” settings of this ad unit). I probably should also say that if you set “Show public service ads” instead of the “F...

   AdSense,Ads,Blank,Reason,Solution     2011-07-25 12:52:29

  Stuff The Internet Says On Scalability For September 16, 2011

Between love and madness lies HighScalability:Google now 10x better: MapReduce sorts 1 petabyte of data using 8000 computers in 33 minutes; 1 Billion on Social Networks;Tumblr at 10 Billion Posts; Twitter at 100 Million Users; Testing at Google Scale: 1800 builds, 120 million test suites, 60 million tests run daily.From the Dash Memo on Google's Plan: Go is a very promising systems-programming language in the vein of C++. We fully hope and expect that Go become...

   Scalability,Go,Google,MapReduce,Muppet,M     2011-09-20 11:22:36

  Why I love Common Lisp and hate Java

“Common what?” is a common reply I get when I mention Common Lisp. Perhaps rightly so, since Common Lisp is not all that common these days. Developed in the sixties, it is one of the oldest programming languages out there. In its heydays it was used mostly for Artificial Intelligence research at MIT, Stanford, Carnegie Mellon and the like, and therefore has a lingering association with AI. People not in AI shy away from Lisp. Common Lisp is a powerful and versatile program...

   Lisp,Java,Comparison,Common Lisp     2012-01-30 05:48:16

  SQL Injection through HTTP Headers

During vulnerability assessment or penetration testing, identifying the input vectors of the target application is a primordial step. Sometimes, when dealing with Web application testing, verification routines related to SQL injection flaws discovery are restricted to the GET and POST variables as the unique inputs vectors ever. What about other HTTP header parameters? Aren’t they potential input vectors for SQL injection attacks? How can one test all these HTTP parameters and whic...

   Code security,SQL injection,HTTP header     2012-04-05 11:42:04

  Java Sequential IO Performance

Many applications record a series of events to file-based storage for later use.  This can be anything from logging and auditing, through to keeping a transaction redo log in an event sourced design or its close relative CQRS.  Java has a number of means by which a file can be sequentially written to, or read back again.  This article explores some of these mechanisms to understand their performance characteristics.  For the scope of this article I will be using pre-a...

   Java,IO,Sequential,Blocking     2012-02-23 07:09:10

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