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  • Should I use parentheses in logical statements even where not necessary?

    - by Jeff Bridgman
    Let's say I have a boolean condition a AND b OR c AND d and I'm using a language where AND has a higher order of operation precedent than OR. I could write this line of code: If (a AND b) OR (c AND d) Then ... But really, that's equivalent to: If a AND b OR c AND d Then ... Are there any arguments in for or against including the extraneous parentheses? Does practical experience suggest that it is worth including them for readability? Or is it a sign that a developer needs to really sit down and become confident in the basics of their language?

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  • Only run CRON job if connected to specific wifi network

    - by Herbert
    I am a newbie to scripting on Linux (Lubuntu), but I would like to make a script that runs a cron job only if my laptop is connected to my home wifi. Is this possible? I guess, I could do something with iwconfig and pull the ESSID from there with grep? So far, I tried this and it seems to work: #!/bin/bash # CRON, connected to specific WIFI clear netid=HOFF216 if iwconfig | grep $netid then clear echo "True, we are connected to $netid" rsync ........... else clear echo "False, we are not connected to $netid" fi

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  • 5 Cmdlets to Get You Started with PowerShell

    - by Taylor Gibb
    PowerShell is quickly becoming the preferred scripting language and CLI of Power Users as well as IT Pros. It’s well worth learning a few commands to get you started, so we’ve got 5 useful cmdlets for you to learn today. HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization

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  • Is it a good practice to use smaller data types for variables to save memory?

    - by ThePlan
    When I learned the C++ language for the first time I learned that besides int, float etc, smaller or bigger versions of these data types existed within the language. For example I could call a variable x int x; or short int x; The main difference being that short int takes 2 bytes of memory while int takes 4 bytes, and short int has a lesser value, but we could also call this to make it even smaller: int x; short int x; unsigned short int x; which is even more restrictive. My question here is if it's a good practice to use separate data types according to what values your variable take within the program. Is it a good idea to always declare variables according to these data types?

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  • How to better start learning programming - with imperative or declarative languages?

    - by user712092
    Someone is interested in learning to program. What language paradigm should I recomend him - imperative or declarative? And what programming language should he start with? I think that declarative because it is closer to math. And I would say that Prolog might be the best start because it is based on logic and programs are short. On the other hand at school we started learning from imperative languages and I am not sure whether there is a benefit to start with them instead of declarive ones. Thanks. :)

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  • Why do "Joke" programming languages exist? [closed]

    - by ThePlan
    First of all please be aware this post contains some abusive language but I hope it will not bother anyone. I apologize for the bad language but that's what the name is. As I've been doing documentation on existing programming languages attempting to make a complete list of them I stumbled across terrible programming languages, which were clearly not made for actual use and implementation due to their insane difficulty. Languages such as Brainfu*k and LOLCODE or Whitespace are fool languages because they have no real use. For example, a "Hello world" program written in BrainFu*k. Taken from Wikipedia: The following program prints "Hello World!" and a newline to the screen: +++++ +++++ initialize counter (cell #0) to 10 [ use loop to set the next four cells to 70/100/30/10 > +++++ ++ add 7 to cell #1 > +++++ +++++ add 10 to cell #2 > +++ add 3 to cell #3 > + add 1 to cell #4 <<<< - decrement counter (cell #0) ] > ++ . print 'H' > + . print 'e' +++++ ++ . print 'l' . print 'l' +++ . print 'o' > ++ . print ' ' << +++++ +++++ +++++ . print 'W' > . print 'o' +++ . print 'r' ----- - . print 'l' ----- --- . print 'd' > + . print '!' > . print '\n' or another example taken from LOLCODE language: HAI CAN HAS STDIO? PLZ OPEN FILE "LOLCATS.TXT"? AWSUM THX VISIBLE FILE O NOES INVISIBLE "ERROR!" KTHXBYE These languages are very difficult to learn/read/work with. My question is - Why do they exist? What is the purpose of them? Also, is there an official "name" for these type of languages?

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  • Unix as opposed to Windows (Java and C++)

    - by user997112
    Firstly I should explain the background. I am interested in high frequency trading programming roles. After looking at many job specs it is very clear that there is a big demand for programmers who have programmed Java and C++ on Unix as opposed to Windows. My question is what are the differences a High Freq programmer would come across? It cannot be something in the language itself because syntactically they do not differ over OS? Therefore I thought it must be something which the programming language has to interface, resources etc? Could anyone please help me out as I am trying to improve my C++/Java on Unix, in order to aim for this type of career? ps I'm guessing part of this answer lies with the socket infrastructure on Unix?

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  • Novice developer

    - by Shrikant
    Sir. I'm a student of B.Tech final year from the CSE branch. I'm using Ubuntu since the last 3 years. It gave me a lot of knowledge. So now I want to repay Ubuntu back by developing some apps for Ubuntu, but I don't know which language I should choose: Java, C or C++ or something else. So please, guide me how to start. I have intermediate knowlegde of C, C++ , Java & Linux scripts. So in which language should i start? I don't have any live software development knowledge so explain me everything. Thank you

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  • TOP 25 Most Dangerous Software Errors for 2010

    - by TATWORTH
    A top 25 most dangerous list of software errors has been published at http://www.sans.org/top25-software-errors/ Insterestingly the top error listed was cross site scripting. So what do you do if have to accept HTML input? I suggest that write a white list filter function to allow through only acceptable mark-up. A basis for such a function can be found in the common filter function at http://commonfilter.codeplex.com/

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  • WebLogic Server??????????

    - by Masa.Sasaki
    ???2?9??54?????! ?????????????8?WebLogic Server???@???????????WebLogic Server?3?????????????????????????????????????WebLogic Server???????????! WebLogic Server?MBean???????????2?????? ???????????????????????????????????????????????????????????????????????????????WebLogic Server?JRockit??????????????????????????????JRockit???????????&??????????????????????????WebLogic Server????????????????????????????????????????????????????????????????? ??????????????????????????????? ?????JMX MBean??????????GUI??????????????????????WLST (WebLogic Scripting Tool)????????Jython??????????????????????????MBean????????GUI???????????????????????????????????WebLogic Server???????????????????????????????????????????????????? ???????????2?16?(?)???6?:30?????14? WebLogic Server???@????????????????????????????????????????????(??????????)?

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  • New Exadata and Exalogic Public References

    - by Javier Puerta
    CUSTOMER SUCCESS STORIES & SPOTLIGHTS Godfrey Phillips (India) Exadata, EBS, BI, Agile Published: October 23, 2013 Cortal Sensors (Germany) Exadata Published: October 18, 2013 ASBIS (Slovakia – local language version) English version Exadata, Linux, Oracle Database Appliance, SPARC T4-1, SPARC T5-2, Oracle Solaris Published: October 17, 2013 National Instruments (US) Exadata, BI, EM12c Published: October 15, 2013 United Microelectronics Corporation (Taiwan) Exadata Published: October 14, 2013 Panasonic Information Systems (Japan - local language version] Exadata, Data Guard Published: October 8, 2013 Pinellas County (USA) Exalytics, OEM, OBIEE, Hyperion PS Planning/Budgeting, EBS, Financials Published: Oct. 8, 2013 Korea Enterprise Data (Korea) [in English] Oracle SuperCluster, Solaris 11, ZFS Storage, OEM, Database Published: October 03, 2013

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  • What are the tools, programming languages and development processes of AAA games?

    - by Pan.student
    Only thing I am able to find about "big" games like ac, hl, bf, cod is engine used to run the game. But I am interested in what software development methodology, programming and scripting languages were used. As well as tools for creating models, music, animations and other media. Further, were the team team organisations and so on for a certain game (or game series). Is this information even available to the public?

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  • What is Pseudocode?

    - by Jae
    I've seen a lot of mentions of Pseudocode lately, on this site and others. But I don't get it: What is Pseudocode? For example, the Wikipedia article below says "It uses the structural conventions of a programming language, but is intended for human reading rather than machine reading." Does this mean that it isn't actually used to make programs? Why is it used? How is it used? Is it considered a Programming Language? See the above Wikipedia quote. Is it commonly known/used? Anything else... I honestly don't know where to start with this. I have Googled it and I've seen the Wikipedia article on the topic, but I still don't fully understand what it is.

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  • Google Maps keeps displaying in Spanish

    - by Ken Hortsch
    Originally posted on: http://geekswithblogs.net/BlueProbe/archive/2013/11/12/154610.aspxIn Chrome I use Google Maps as a search provider.  That way I can just type maps for the URL address, hit a couple of tab keys, and enter the maps address and have the page rendered with my map.  Now periodically maps were displaying in Spanish with a "click here to translate to English” option.  Huh?  My language settings on the browser and within Google settings all were English.  Turns out I had set my Chrome search provider string to include a language query parm=es.  Why would I do that?  Evil twin perhaps.

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  • How to make audio and video streaming servers work?

    - by Santosh Linkha
    I am PHP MySQL developer and I am interested in the way television and radio are broadcasted over Internet live. I want to know how it works and and what are its requirements (which package of which programming language offers the best). And please clarify me: Websites are stored in servers. From my desktop, if I want to broadcast some video, then I need to connect to webserver (to upstream the video). Is there an application to do that (or do I have to code that or embed in my web application and which programming language would be suitable (does Python support that))? And I also need a script to handle the upstreamed video or audio (can I do that with PHP)?

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  • Speaking - 24 Hours of PASS, Summit Preview Edition

    - by AllenMWhite
    There's so much to learn to be effective with SQL Server, and you have an opportunity to immerse yourselves in 24 hours of free technical training this week from PASS, via the 24 Hours of PASS event. I'll be presenting an introductory session on PowerShell called PowerShell 101 for the SQL Server DBA . Here's the abstract: The more you have to manage, the more likely you'll want to automate your processes. PowerShell is the scripting language that will make you truly effective at managing lots of...(read more)

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  • My 2011 Professional Development Goals

    - by kerry
    I thought it might be a good idea to post some professional goals for 2011.  Hopefully, I can look at this list at the end of the year and have accomplished most of them. Release an Android app to the marketplace – I figured I would put this first because I have one that I have been working on for a while and it is about ready.  Along with this, I would like to start another one and continue to develop my Android skills. Contribute free software to the community – Again, I have an SMF plugin that will fill this requirement nicely.  Just need to give it some polish and release it.  That’s not all, I would like to add a few more libraries on github, or possibly contribute to an open source project. Regularly attend a user group meetings outside of Java – A great way to meet people and learn new things. Obtain the Oracle Certified Web Developer Certification – I got the SCJP a few years ago and would like to obtain another one.  One step closer to Certified Enterprise Architect. Learn scala – As a language geek, I like to stick to the Pragmatic Programmer’s ‘learn a new language every year’ rule (last year was Ruby).  Scala presents some new concepts all wrapped in a JVM-based OOP language.  Time to dig in. Write an app using JSF – New JEE 6 features are pretty slick.  I want to really leverage them in an app. Present at a user group meeting – Last but not least, I would like to improve my public speaking and skills in presenting.  Also, is a great reason to dig in to some latest and greatest tech. Use git more, and more effectively – Trying to move all my personal projects from Subversion to Git. That’s it.  A little daunting, but I am confident I can at least touch on most of these and it’s a great roadmap to my professional development.

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  • What are some non-MS languages that can write xlsx (Excel 2007+) documents efficiently?

    - by Honus Wagner
    Unfortunately, Excel format is required for the project I am working on. I have no problems getting the data I need in objects and arrays, and currently PHPExcel is doing handling the document generation. It works, but it's slow and loopy. Was wondering if there is a more efficient server language to generate Excel documents (not CSVs). This is a pure Linux environment so I need to stay away from .NET. I am open to any programming language that does it cleanly and efficiently. Thanks.

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  • Why does everyone dislike PHP? [closed]

    - by SomeKittens
    I'm primarily a Java/Python programmer, but I just picked up an entry-level job doing web development. I had to learn PHP, and several of my CS friends told me that it would stunt my coding ability/be terrible to program in/murder me in the middle of the night. So far, there have been annoying moments with the language (one particular thing that bugs me is the syntax for calling functions...), but nothing living up to the statements of my friends. I still haven't learned very much about the language. Is their hate justified? Why or why not? A few quotes I've seen about PHP: Haskell is faster than C++, more concise than Perl, more regular than Python, more flexible than Ruby, more typeful than C#, more robust than Java, and has absolutely nothing in common with PHP. Audrey Tang "PHP is a minor evil perpetrated and created by incompetent amateurs, whereas Perl is a great and insidious evil, perpetrated by skilled but perverted professionals." Jon Ribbens. Programmer.

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  • Developing Functional Specifications based on the UML Model

    A few days ago I found this white paper I did around 2004 way before I started really blogging:The Process OverviewUse-case to Specifications is a processing using UML use-cases to identify user requirements and model systems to be able to properly define functionality. This document is intended to serve as an execution based walk-through of this process.As background: The Unified Modeling Language (UML) is a language for specifying, visualizing, constructing, and documenting the artifacts of software...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • USB (wireless) keyboard not recognised during install

    - by Jon C
    I'm just trying my first trip into the world of Ubuntu. Trying to install from CD on to a virgin machine, I get the initial language prompt, select 'English', I get the Ubuntu install options, select 'Install Ubuntu Server'. I'm then presented with a further 'Language for installation' screen. At this point my keyboard stops working...! Some specifics: I'm using a Logitech wireless USB keyboard - it works fine on another machine; Machine is a ProLiant Micorserver N54L (No PS/2 ports); BIOS USB support is set to Legacy. Any ideas...? Thanks, Jonathan

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