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Concise bash programming skills
The following are some concise bash programming skills which we may need in our daily programming work. 1. Check status of command execution The usual way: echo abcdee | grep -q abcd if [ $? -eq 0 ]; then echo "Found" else echo "Not found" fi Concise way: if echo abcdee | grep -q abc; then echo "Found" else echo "Not found" fi Of course you can remove if...else with following code [Sun Nov 04 05:58 AM] [kodango@devops] ~/workspace $ echo abcdee | grep -q ...
Do You Make These 5 Database Design Mistakes?
Look, everyone makes mistakes. It’s true. But not all of us have the chance to make mistakes that end up costing millions of dollars in hardware and production support costs. Any one of the following five mistakes listed below will add additional costs to your company. It’s guaranteed. The costs could be hardware related (extra disk space, network bandwidth), which tend to add up quickly. The costs are also support related (bad performance, database re-design, report cre...
Database design,Mistake,Advice,Data type,Compatibility 2012-01-03 11:25:13
Identify & Address 3 Common BYOD Adoption Problems
With an abundance of mobile phones, tablets, and other personal devices; delivering Enterprise Mobility Solutions has become much more easier as compared to early years, however; the new avenues that have opened up for Enterprise Mobility Consulting in India brings in new, interesting and unforeseen challenges as well. Alongside the growing presence of SaaS applications and BYOD; data protection and integrity has become very critical and a concern that demands immediate attention. Here are some ...
enterprise mobility solutions, enterprise mobility consulting, enterprise mobility management servic 2015-03-16 06:05:21
The Basics of jQuery
So, a while back I had an internal presentation at work about this topic. A few good friends in the community took a look at my slides, and they thought it would make a nice blog post because “there can’t be too many good posts about jQuery introduction and best-practices.†Whether this post is going to be good or not, is up to you but I’ll try to outline what jQuery is, and how you can start working with it. For most of you, this will just be a re-cap and probably...
JavaScript,jQuery,Framework,Basic 2012-03-01 04:57:18
Method chaining and lazy evaluation in Ruby
Method chaining has been all the rage lately and every database wrapper or aything else that’s uses queries seems to be doing it. But, how does it work? To figure that out, we’ll write a library that can chain method calls to build up a MongoDB query in this article. Let’s get started! Oh, and don’t worry if you haven’t used MongoDB before, I’m just using it as an example to query on. If you’re using this guide to build a querying library...
Ruby,Method chaining,Lazy evaluation,Implementation 2011-11-29 08:51:17
Building The Linux Kernel In 60 Seconds
In less than one minute, it's now possible to build the Linux kernel from source on a desktop. Besides finishing up the Phoronix Test Suite 3.6-Arendal release this weekend, on Saturday I began running some new Intel CPU benchmarks. In building the Linux 3.1 kernel for x86_64 in a default configuration (make defconfig), I've now managed to trim down the compile time to less than sixty seconds on a single-socket desktop system. Similar speeds can be achieved out of multi-socket servers and othe...
Linux kernal,Build,Intel processor,sgort time 2011-12-12 07:45:32
Getting started with C++ TR1 regular expressions
Overview This article is written for the benefit of someone familiar with regular expressions but not with the use of regular expressions in C++ via the TR1 (C++ Standards Committee Technical Report 1) extensions. Comparisons will be made with Perl for those familiar with Perl, though no knowledge of Perl is required. The focus is not on the syntax of regular expressions per se but rather how to use regular expressions to search for patterns and make replacements. Support for TR1 ext...
Regular expression,Replace,TR1,Extension 2011-08-14 07:25:20
Hail the return of native code and the resurgence of C++
Programming language trends come and go. First, Java is the hot new language, then it's Python, then Ruby steals the limelight, then it's back to JavaScript. But the latest language darling is probably the last one anyone expected. Believe it or not, 2011 could be the year of C++. Last week, the latest version of the ISO C++ Standard was approved by unanimous vote. It's the first major revision of the language in 13 years. Now officially known as C++11, the new standard introduces features desig...
C++,Future,Return back,Popular,Local dev 2011-08-24 02:20:24
Developing Game Audio with the Web Audio API
Caution: This article discusses APIs that are not yet fully standardized and still in flux. Be cautious when using experimental APIs in your own projects. Introduction Audio is a huge part of what makes multimedia experiences so compelling. If you've ever tried watching a movie with the sound off, you've probably noticed this. Games are no exception! My fondest video game memories are of the music and sound effects. Now, in many cases nearly two decades after playing my favorites, I still c...
Web Audio,HTML5,Game audio 2012-04-15 01:25:23
Hello, Kernel!
When we learn module programming, the first small program must be hello, kernel!. For a novice, how do we avoid some mistakes and how to fix the bugs we have when writing the first module program? Is there any example we can refer to? Here is one example. 1. Write the hello.c 01 #include <linux/init.h> 02 #include <linux/module.h> 03 #include <linux/kernel.h> 04 //Compulsory 05 //Module lincese declaration 06 MODULE_LICENSE("GPL"); ...
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