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  • Why is trailing whitespace a big deal?

    - by EpsilonVector
    Trailing whitespace is enough of a problem for programmers that editors like Emacs have special functions that highlight it or get rid of it automatically, and many coding standards require you to eliminate all instances of it. I'm not entirely sure why though. I can think of one practical reason of avoiding unnecessary whitespace, and it is that if people are not careful about avoiding it, then they might change it in between commits, and then we get diffs polluted with seemingly unchanged lines, just because someone removed or added a space. This already sounds like a pretty good reason to avoid it, but I do want to see if there's more to it than that. So, why is trailing whitespace such a big deal?

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  • Is it ok to replace optimized code with readable code?

    - by Coder
    Sometimes you run into a situation where you have to extend/improve an existing code. You see that the old code is very lean, but it's also difficult to extend, and takes time to read. Is it a good idea to replace it with modern code? Some time ago I liked the lean approach, but now, it seems to me that it's better to sacrifice a lot of optimizations in favor of higher abstractions, better interfaces and more readable, extendable code. The compilers seem to be getting better as well, so things like struct abc = {} are silently turned into memsets, shared_ptrs are pretty much producing the same code as raw pointer twiddling, templates are working super good because they produce super lean code, and so on. But still, sometimes you see stack based arrays and old C functions with some obscure logic, and usually they are not on the critical path. Is it good idea to change such code if you have to touch a small piece of it either way?

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  • Good Practices for development team in large projects

    - by Moshe Magnes
    Since I started learning C a few years ago, I have never been a part of a team that worked on a project. Im very interested to know what are the best practices for writing large projects in C. One of the things i want to know, is when (not how) do I split my project into different source files. My previous experience is with writing a header-source duo (the functions defined in the header are written in the source). I want to know what are the best practices for splitting a project, and some pointers on important things when writing a project as part of a team.

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  • VMWare Kernel Modules will not compile or update on Ubuntu 12.04

    - by IsaacS
    Kernel Module Update was required when opening VMWare client (vmplayer) then following error occurs. Any idea would be appreciated. Unable to start services. See log file /tmp/vmware-root/setup-NNN.log for details (Note: NNN looks like random numbers) On GUI that show progress of updating, "Virtual Netowork Device" show red flag appears. Content of .log file is here: http://pastebin.com/wEKT5UHf This page suggests installing linux-headers-generic and build-essential, which are already installed on mine (thus no good). This could be 1st execution of vmplayer on my machine since I upgraded to Ubuntu 12.04 from 11.10. Environment: VMware Player 4.0.3 build-703057

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  • How to Multitask in the Linux Terminal: 3 Ways to Use Multiple Shells at Once

    - by Chris Hoffman
    The Linux terminal has rich multitasking capabilities. You can switch between the virtual consoles already running on your system, use Bash job control to run processes in the background, and take advantage of GNU screen, a terminal “window manager.” You don’t have to stick to a single command at a time. Whether you want to run a process in the background and revisit it occasionally or run multiple time-consuming tasks at once, Linux offers several options. How to Stress Test the Hard Drives in Your PC or Server How To Customize Your Android Lock Screen with WidgetLocker The Best Free Portable Apps for Your Flash Drive Toolkit

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  • Adding cards to a vector for computer card game

    - by Tucker Morgan
    I am writing a Card game that has a deck size of 30 cards, each one of them has to be a unique, or at least a another (new XXXX) statement in a .push_back function, into a vector. Right now my plan is to add them to a vector one at a time with four separate, depending on what deck type you choose, collections of thirty .push_back functions. If the collection of card is not up for customization, other than what one of the four suits you pick, is there a quicker way of doing this, seems kinda tedious, and something that someone would have found a better way of doing.

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  • Which programming language for text editing?

    - by Ali
    I need a programming language for text editing and processing (replace, formatting, regex, string comparison, word processing, text analysis, etc). Which programming language is more powerful and has more functions for this purpose? Since I work PHP for my web projects, I currently use PHP; but the fact is that PHP is a scripting language for web applications, my current project is offline. I am curious if other programming languages such as Perl, Python, C, C++, Java, etc have more functionality for this purpose, and worth of shifting the project?

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  • How to do more with Oracle VM Templates

    - by uwes
    On Oracle's Virtualization Blog you can find an interesting post regarding working and using Oracle VM Templates, title is "Opening The Oracle VM Templates Blackbox". Monica Kumar gives a brief explanation what Oracle VM Guest Additions are and how they can help to work smarter with Templates. At the end you will find a hint to join an up coming webcast (October 24th), where you can get more knowledge from experts like Robbie de Meyer or Saar Maoz. Register for the live Webcast. View the whitepaper on Oracle VM Templates Automated Virtual Machine Provisioning.

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  • how to assign web server and domain a public ip adress

    - by kdavis8
    i have installed an ISO image of windows server 2008 r2 onto my VMware workstation, as a virtual server. I am trying to host my own web server for testing purposes.I have Internet service with sprint and i called them to obtain my public ip address. Now that i have my public ip address how to i assign it to my server? I also have a web domain name that i would like to point it at that web server. Do i give it the public ip address or do i give it the name of the server?

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  • Resources for improving your comprehension of recursion?

    - by Andrew M
    I know what recursion is (when a patten reoccurs within itself, typically a function that calls itself on one of its lines, after a breakout conditional... right?), and I can understand recursive functions if I study them closely. My problem is, when I see new examples, I'm always initially confused. If I see a loop, or a mapping, zipping, nesting, polymorphic calling, and so on, I know what's going just by looking at it. When I see recursive code, my thought process is usually 'wtf is this?' followed by 'oh it's recursive' followed by 'I guess it must work, if they say it does.' So do you have any tips/plans/resources for building up your skills in this area? Recursion is kind of a wierd concept so I'm thinking the way to tackle it may be equally wierd and inobvious.

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  • Announcement Oracle Solaris 11.1 Availability!

    - by uwes
    On 25th of October Oracle announced the availability of Oracle Solaris 11.1. Highlights include: 8x faster database startup and shutdown and online resizing of the database SGA with a new optimized shared memory interface between the database and Oracle Solaris 11.1 Up to 20% throughput increases for Oracle Real Application Clusters by offloading lock management into the Oracle Solaris kernel Expanded support for Software Defined Networks (SDN) with Edge Virtual Bridging enhancements to maximize network resource utilization and manage bandwidth in cloud environments 4x faster Solaris Zone updates with parallel operations shorten maintenance windows New built-in memory predictor monitors application memory use and provides optimized memory page sizes and resource location to speed overall application performance. More information could be found under the following links: Oracle Solaris 11.1 Data Sheet  What's New in Oracle Solaris 11.1 Oracle Solaris 11.1 FAQs Oracle.com Oracle Solaris page Oracle Technology Network Oracle Solaris page Resources for downloading: Download Solaris 11.1 Order Solaris 11.1 media kit Existing customers can quickly and simply update using the network based repository

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  • Nvidia G96 [GeForce 9400 GT] and application graphic issues

    - by Fabio
    I've got a quite old NVIDIA graphic card and I with installed restricted drivers from Settings panel (as also shown in this thread). ? ~ lspci 02:00.0 VGA compatible controller: NVIDIA Corporation G96 [GeForce 9400 GT] (rev a1) I tried a lot of them: version 173-update, current, beta, but the only one that can run unity-2d it's current-update. That's Ubuntu 12.04.1 LTS 64bit. However... Unity crashes, sometimes windows border disappear, Java Virtual Machine doesn't works, font rendering it's slow and so on. How can I solve this? Some suggestions? Thanks!

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  • New at TRC: Networking Products

    - by uwes
    The new category "Networking Products" has been added last week at Oracle Hardware Technical Resource Center (HW TRC). The following list summarize the different areas which are included. Feel free to explore. Oracle Virtual Networking customer and technical presentation, Datasheets, partner FAQ and more 10 GbE Network Adapters and Switches customer and technical presentations, Datasheets, partner FAQ, Documentation and more Gigabit Ethernet customer presentations, partner FAQ, Documentation and more InfiniBand Datasheets, partner FAQ and Documentation Blade Server Network Express Modules (NEMs) technical presentation, Datasheets, partner FAQ, White Paper and more Storage Networking customer presentations, Datasheets, partner FAQ and more Please be aware that you need to be registered at the Oracel HW TRC. To register click here ... and follow the instructions..

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  • Anti-cheat Javascript for browser/HTML5 game

    - by Billy Ninja
    I'm planning on venturing on making a single player action rpg in js/html5, and I'd like to prevent cheating. I don't need 100% protection, since it's not going to be a multiplayer game, but I want some level of protection. So what strategies you suggest beyond minify and obfuscation? I wouldn't bother to make some server side simple checking, but I don't want to go the Diablo 3 path keeping all my game state changes on the server side. Since it's going to be a rpg of sorts I came up with the idea of making a stats inspector that checks abrupt changes in their values, but I'm not sure how it consistent and trusty it can be. What about variables and functions escopes? Working on smaller escopes whenever possible is safer, but it's worth the effort? Is there anyway for the javascript to self inspect it's text, like in a checksum? There are browser specific solutions? I wouldn't bother to restrain it for Chrome only in the early builds.

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  • Cant get lm-sensors to load ATI Radeon temp and fan or output all settings

    - by woody
    New to Linux and having minor issues :/ . I followed this guide initially but did not recieve the proper output and did not show my ATI Radeon HD 5000 temp or fan speed. Then used this guide, same problems exhibited. No issues installing and no errors. I think its not reading i2c for some reason. The proprietary driver is installed and functioning correctly according fglrxinfo. I can use aticonfig commands and view both temp and fan. Any ideas on how to get the ATI Radeon sensors working under 'sensors'? When i run 'sudo sensors-detect' this is my ouput # sensors-detect revision 5984 (2011-07-10 21:22:53 +0200) # System: LENOVO IdeaPad Y560 (laptop) # Board: Lenovo KL3 This program will help you determine which kernel modules you need to load to use lm_sensors most effectively. It is generally safe and recommended to accept the default answers to all questions, unless you know what you're doing. Some south bridges, CPUs or memory controllers contain embedded sensors. Do you want to scan for them? This is totally safe. (YES/no): y Silicon Integrated Systems SIS5595... No VIA VT82C686 Integrated Sensors... No VIA VT8231 Integrated Sensors... No AMD K8 thermal sensors... No AMD Family 10h thermal sensors... No AMD Family 11h thermal sensors... No AMD Family 12h and 14h thermal sensors... No AMD Family 15h thermal sensors... No AMD Family 15h power sensors... No Intel digital thermal sensor... Success! (driver `coretemp') Intel AMB FB-DIMM thermal sensor... No VIA C7 thermal sensor... No VIA Nano thermal sensor... No Some Super I/O chips contain embedded sensors. We have to write to standard I/O ports to probe them. This is usually safe. Do you want to scan for Super I/O sensors? (YES/no): y Probing for Super-I/O at 0x2e/0x2f Trying family `National Semiconductor/ITE'... Yes Found unknown chip with ID 0x8502 Probing for Super-I/O at 0x4e/0x4f Trying family `National Semiconductor/ITE'... No Trying family `SMSC'... No Trying family `VIA/Winbond/Nuvoton/Fintek'... No Trying family `ITE'... No Some hardware monitoring chips are accessible through the ISA I/O ports. We have to write to arbitrary I/O ports to probe them. This is usually safe though. Yes, you do have ISA I/O ports even if you do not have any ISA slots! Do you want to scan the ISA I/O ports? (YES/no): y Probing for `National Semiconductor LM78' at 0x290... No Probing for `National Semiconductor LM79' at 0x290... No Probing for `Winbond W83781D' at 0x290... No Probing for `Winbond W83782D' at 0x290... No Lastly, we can probe the I2C/SMBus adapters for connected hardware monitoring devices. This is the most risky part, and while it works reasonably well on most systems, it has been reported to cause trouble on some systems. Do you want to probe the I2C/SMBus adapters now? (YES/no): y Using driver `i2c-i801' for device 0000:00:1f.3: Intel 3400/5 Series (PCH) Now follows a summary of the probes I have just done. Just press ENTER to continue: Driver `coretemp': * Chip `Intel digital thermal sensor' (confidence: 9) To load everything that is needed, add this to /etc/modules: #----cut here---- # Chip drivers coretemp #----cut here---- If you have some drivers built into your kernel, the list above will contain too many modules. Skip the appropriate ones! Do you want to add these lines automatically to /etc/modules? (yes/NO) My output for 'sensors' is: acpitz-virtual-0 Adapter: Virtual device temp1: +58.0°C (crit = +100.0°C) coretemp-isa-0000 Adapter: ISA adapter Core 0: +56.0°C (high = +84.0°C, crit = +100.0°C) Core 1: +57.0°C (high = +84.0°C, crit = +100.0°C) Core 2: +58.0°C (high = +84.0°C, crit = +100.0°C) Core 3: +57.0°C (high = +84.0°C, crit = +100.0°C) and my '/etc/modules' is: # /etc/modules: kernel modules to load at boot time. # # This file contains the names of kernel modules that should be loaded # at boot time, one per line. Lines beginning with "#" are ignored. lp rtc # Generated by sensors-detect on Fri Nov 30 23:24:31 2012 # Chip drivers coretemp

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  • Webcast Replay: OVCA Launch Channel Update

    - by Claudia Caramelli-Oracle
    Last 28 May we held a webcast about Oracle Virtual Compute Appliance (OVCA) launch update for the channel. A brief product overview of OVCA has been followed by some great OPN program content, resell criteria, OPN Incentive Program and Demo Equipment Program details. You can download the slides HERE, but remember, you need to be a registered member of the community to be able to access the workspace. If you are not a member yet, you can register here. We look forward to welcoming you to another webcast soon!

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  • For normal mapping, why can we not simply add the tangent normal to the surface normal?

    - by sebf
    I am looking at implementing bump mapping (which in all implementations I have seen is really normal mapping), and so far all I have read says that to do this, we create a matrix to convert from world-space to tangent-space, in order to transform the lights and eye direction vectors into tangent space, so that the vectors from the normal map may be used directly in place of those passed through from the vertex shader. What I do not understand though, is why we cannot just use the normalised sum of the sampled-normal vector, and the surface-normal? (assuming we already transform and pass through the surface normal for the existing lighting functions) Take the diagram below; the normal is simply the deviation from the 'reference normal' for any given coordinate system, correct? And transforming the surface normal of a mapped surface from world space to tangent space makes it equivalent to the tangent space 'reference normal', no? If so, why do we transform all lighting vectors into tangent space, instead of simply transforming the sampled tangent once in the pixel shader?

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  • Is the 'C' in MVC really necessary?

    - by Anne Nonimus
    I understand the role of the model and view in the Model-View-Controller pattern, but I have a hard time understanding why a controller is necessary. Let's assume we're creating a chess program using an MVC approach; the game state should be the model, and the GUI should be the view. What exactly is the controller in this case? Is it just a separate class that has all the functions that will be called when you, say, click on a tile? Why not just perform all the logic on the model in the view itself?

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  • Oracle announces Brand New Tuxedo 11g Release

    - by ruma.sanyal
    Today Oracle introduced two brand new products within the Tuxedo product line of its application grid portfolio. Oracle Tuxedo Application Runtime for CICS and Batch and Oracle Application Rehosting Workbench provide the ability to automate rehosting of mainframe Online and Batch applications to open systems running under Oracle Tuxedo. Oracle Application Rehosting Workbench automates adaptation of COBOL programs, JCL conversion for batch applications, and migration of VSAM files and DB2 data schema. Migration cost, risk, and project length and complexity are dramatically reduced with over 90% of application assets re-hosted on open systems 'as-is'. Impact on the organization is minimized - users are protected from change by support for 3270 green screens, and developers continue to use familiar CICS APIs, batxh functions, and common utilities. Other major features of this release are as follows: - Hotpluggability through introduction of Oracle Tuxedo JCA Adapter - Metadata driven application development using SCA programming model - Support for Python and Ruby languages to develop business services - Improved scalability and availability, TSAM enhancements Register for a live webinar with Oracle Fusion Middleware Senior VP Hasan Rizvi Read the press release Find more details on these exciting new products

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  • Microsoft Ramps up Security in Windows 8

    To the average consumer, improvements in the realm of security may not have the most appeal with it comes to a new working environment such as Windows 8. After all, the operating system's future release is expected to offer such flashy bells and whistles as a nifty Metro interface, a tile-based Start screen that provides a quick jump to different functions, and much more. Although these stylish features may be what jumps out at first, it is going to be hard to deny the usefulness and virtual necessity of Windows 8's new security features. The number of consumers who have turned to the intern...

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  • ubuntu is very slow

    - by johnny smithens
    Hello all. I am new with Ubuntu, and it is very slow(even in Ubuntu 2D). The performance is degraded for almost any task. I just reinstalled with amd64, and tried updating the Nvidia drivers with Nvidia Xserver. but it made no difference. This is the output of free -m: total used free shared buffers cached Mem: 3006 1318 1688 0 61 699 -/+ buffers/cache: 556 2449 Swap: 3064 0 3064 tl;dr - total: 3006, used: 1318 When I see the virtual console with Ctrl+Alt+F2, I see constantly: Assuming Drive Cache: write through; asking for cache data failed; It is very frustrating. Thanks in advance!

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  • How do I change my resolution to 1600*900 for a wide screen monitor?

    - by Madhu
    How do I change my resolution to 1600*900 for a wide screen monitor in Oneiric? My Hardware configuration is as below: madhu@madhu-Home:~$ lspci 00:00.0 Host bridge: Silicon Integrated Systems [SiS] 671MX 00:01.0 PCI bridge: Silicon Integrated Systems [SiS] AGP Port (virtual PCI-to-PCI bridge) 00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS968 [MuTIOL Media IO] (rev 01) 00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev 01) 00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) 00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) 00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller 00:04.0 Ethernet controller: Silicon Integrated Systems [SiS] 191 Gigabit Ethernet Adapter (rev 02) 00:05.0 IDE interface: Silicon Integrated Systems [SiS] SATA Controller / IDE mode (rev 03) 00:06.0 PCI bridge: Silicon Integrated Systems [SiS] PCI-to-PCI bridge 00:07.0 PCI bridge: Silicon Integrated Systems [SiS] PCI-to-PCI bridge 00:0f.0 Audio device: Silicon Integrated Systems [SiS] Azalia Audio Controller 00:1f.0 PCI bridge: Silicon Integrated Systems [SiS] PCI-to-PCI bridge 01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 771/671 PCIE VGA Display Adapter (rev 10) madhu@madhu-Home:~$ cat /etc/X11/xorg.conf

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  • Test case as a function or test case as a class

    - by GodMan
    I am having a design problem in test automation:- Requirements - Need to test different servers (using unix console and not GUI) through automation framework. Tests which I'm going to run - Unit, System, Integration Question: While designing a test case, I am thinking that a Test Case should be a part of a test suite (test suite is a class), just as we have in Python's pyunit framework. But, should we keep test cases as functions for a scalable automation framework or should be keep test cases as separate classes(each having their own setup, run and teardown methods) ? From automation perspective, Is the idea of having a test case as a class more scalable, maintainable or as a function?

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  • NoSQL as file meta database

    - by fga
    I am trying to implement a virtual file system structure in front of an object storage (Openstack). For availability reasons we initially chose Cassandra, however while designing file system data model, it looked like a tree structure similar to a relational model. Here is the dilemma for availability and partition tolerance we need NoSQL, but our data model is relational. The intended file system must be able to handle filtered search based on date, name etc. as fast as possible. So what path should i take? Stick to relational with some indexing mechanism backed by 3 rd tools like Apache Solr or dig deeper into NoSQL and find a suitable model and database satisfying the model? P.S: Currently from NoSQL Cassandra or MongoDB are choices proposed by my colleagues.

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  • DNS Configuration when registrar and host are two different companies

    - by dclowd9901
    I'm a total noob when it comes to DNS configuration. My client bought a domain through one company and is hosting their site with another (a virtual dedicated server). I can't find anything on the web that explains one's way through this setup. Where do I start? Which nameservers do I use? Which company's zone files do I edit? Basically it boils down, for me that I don't understand which company takes the lead, and which piggybacks off their configuration. Thanks in advance for the help.

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