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  • Efficient coding in Visual Studio (or another IDE), with touch typing

    - by cheeesus
    Moving the cursor to another position in code is one of the most frequent actions when coding. I don't write my programs from the beginning to the end, like a letter. However, moving the cursor requires me to move my right hand to the key arrows or to the mouse, which feels like an interruption to my writing rhythm, since I'm using touch typing. I want my hands to rest on the keyboard. It's difficult to explain what I mean, but I think every coder using touch typing knows what I mean. I tried many things, like defining some shortcuts as surrogate arrow keys (Shift+Alt+J, K, L, I), or buying a keyboard with a Trackpoint, Trackpad, or Trackball on it, but I have not yet found a satisfying solution to the problem. What is the best solution you know of, regardless of which IDE you use? Edit: Thank you for your answers. I am using a lot of shortkeys, but I think using a Vim plugin in Visual Studio would interfere too much with the shortkeys I am used to. Also, I have a keyboard with a built-in mouse, but I'm still looking for a better solution.

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  • Interfaces and Virtuals Everywhere????

    - by David V. Corbin
    First a disclaimer; this post is about micro-optimization of C# programs and does not apply to most common scenarios - but when it does, it is important to know. Many developers are in the habit of declaring member virtual to allow for future expansion or using interface based designs1. Few of these developers think about what the runtime performance impact of this decision is. A simple test will show that this decision can have a serious impact. For our purposes, we used a simple loop to time the execution of 1 billion calls to both non-virtual and virtual implementations of a method that took no parameters and had a void return type: Direct Call:     1.5uS Virtual Call:   13.0uS The overhead of the call increased by nearly an order of magnitude! Once again, it is important to realize that if the method does anything of significance then this ratio drops quite quickly. If the method does just 1mS of work, then the differential only accounts for a 1% decrease in performance. Additionally the method in question must be called thousands of times in order to produce a meaqsurable impact at the application level. Yet let us consider a situation such as the per-pixel processing of a graphics processing application. Here we may have a method which is called millions of times and even the slightest increase in overhead can have significant ramification. In this case using either explicit virtuals or interface based constructs is likely to be a mistake. In conclusion, good design principles should always be the driving force behind descisions such as these; but remember that these decisions do not come for free.   1) When a concrete class member implements an interface it does not need to be explicitly marked as virtual (unless, of course, it is to be overriden in a derived concerete class). Nevertheless, when accessed via the interface it behaves exactly as if it had been marked as virtual.

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  • Why not have a High Level Language based OS? Are Low Level Languages more efficient?

    - by rtindru
    Without being presumptuous, I would like you to consider the possibility of this. Most OS today are based on pretty low level languages (mainly C/C++) Even the new ones such as Android uses JNI & underlying implementation is in C In fact, (this is a personal observation) many programs written in C run a lot faster than their high level counterparts (eg: Transmission (a bittorrent client on Ubuntu) is a whole lot faster than Vuze(Java) or Deluge(Python)). Even python compilers are written in C, although PyPy is an exception. So is there a particular reason for this? Why is it that all our so called "High Level Languages" with the great "OOP" concepts can't be used in making a solid OS? So I have 2 questions basically. Why are applications written in low level languages more efficient than their HLL counterparts? Do low level languages perform better for the simple reason that they are low level and are translated to machine code easier? Why do we not have a full fledged OS based entirely on a High Level Language?

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  • Graphical driver 13.10 ATI RV630

    - by Michael Cephalus
    I started updating the distro from 13.04 to 13.10. Then I got my hands on a Radeon HD 2600. I installed the RV630 compatible Catalystdriver from the official webpage. Then xserver crashed everytime I opened a browser or vlc fx. I took notice that there was no driver listed in configuration underneath. michael@statubtunu:~$ lshw -c video WARNING: you should run this program as super-user. *-display UNCLAIMED description: VGA compatible controller product: RV630 PRO [Radeon HD 2600 PRO] vendor: Advanced Micro Devices, Inc. [AMD/ATI] physical id: 0 bus info: pci@0000:01:00.0 version: 00 width: 64 bits clock: 33MHz capabilities: vga_controller bus_master cap_list configuration: latency=0 resources: memory:d0000000-dfffffff memory:e0500000-e050ffff ioport:1000(size=256) memory:e0000000-e001ffff i installed additional drivers from jockey and the ubuntu softwarecenter ati-driver. though that only made it to crash xserver completely and when i type: michael@statubtunu:~$ sudo startx X.Org X Server 1.14.3 Release Date: 2013-09-12 X Protocol Version 11, Revision 0 Build Operating System: Linux 3.2.0-37-generic i686 Ubuntu Current Operating System: Linux statubtunu 3.11.0-13-generic #20-Ubuntu SMP Wed Oct 23 17:26:33 UTC 2013 i686 Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.11.0-13-generic root=UUID=8fb2e395-0ea2-4f45-ac66-225696b7ce2c ro quiet splash vt.handoff=7 Build Date: 15 October 2013 09:23:29AM xorg-server 2:1.14.3-3ubuntu2 (For technical support please see http://www.ubuntu.com/support) Current version of pixman: 0.30.2 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/var/log/Xorg.0.log", Time: Tue Nov 12 18:50:02 2013 (==) Using system config directory "/usr/share/X11/xorg.conf.d" Initializing built-in extension Generic Event Extension Initializing built-in extension SHAPE Initializing built-in extension MIT-SHM Initializing built-in extension XInputExtension Initializing built-in extension XTEST Initializing built-in extension BIG-REQUESTS Initializing built-in extension SYNC Initializing built-in extension XKEYBOARD Initializing built-in extension XC-MISC Initializing built-in extension SECURITY Initializing built-in extension XINERAMA Initializing built-in extension XFIXES Initializing built-in extension RENDER Initializing built-in extension RANDR Initializing built-in extension COMPOSITE Initializing built-in extension DAMAGE Initializing built-in extension MIT-SCREEN-SAVER Initializing built-in extension DOUBLE-BUFFER Initializing built-in extension RECORD Initializing built-in extension DPMS Initializing built-in extension X-Resource Initializing built-in extension XVideo Initializing built-in extension XVideo-MotionCompensation Initializing built-in extension SELinux Initializing built-in extension XFree86-VidModeExtension Initializing built-in extension XFree86-DGA Initializing built-in extension XFree86-DRI Initializing built-in extension DRI2 Loading extension GLX ERROR: could not insert 'fglrx': No such device (II) [KMS] drm report modesetting isn't supported. (EE) (EE) Backtrace: (EE) 0: /usr/bin/X (xorg_backtrace+0x49) [0xb77780b9] (EE) 1: /usr/bin/X (0xb75d8000+0x1a3e24) [0xb777be24] (EE) 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb75b540c] (EE) 3: /usr/bin/X (xf86findOption+0x2a) [0xb7681daa] (EE) 4: /usr/bin/X (xf86findOptionValue+0x23) [0xb7681f43] (EE) 5: /usr/bin/X (0xb75d8000+0x7ebfd) [0xb7656bfd] (EE) 6: /usr/bin/X (xf86ProcessOptions+0x37) [0xb7657507] (EE) 7: /usr/lib/xorg/modules/libvbe.so (vbeDoEDID+0xe7) [0xb5eb8647] (EE) 8: /usr/lib/xorg/modules/drivers/vesa_drv.so (0xb5ee7000+0x287c) [0xb5ee987c] (EE) 9: /usr/bin/X (InitOutput+0xb23) [0xb7659c33] (EE) 10: /usr/bin/X (0xb75d8000+0x2a30b) [0xb760230b] (EE) 11: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0xb71ba905] (EE) 12: /usr/bin/X (0xb75d8000+0x2a908) [0xb7602908] (EE) (EE) Segmentation fault at address 0x5 (EE) Fatal server error: (EE) Caught signal 11 (Segmentation fault). Server aborting (EE) (EE) Please consult the The X.Org Foundation support at for help. (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information. (EE) (EE) Server terminated with error (1). Closing log file. This is what comes, but no GUI. Is there any way to deal with this?

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  • learn the programming language for computing functions about integers

    - by asd
    Hi I know something about Pascal, Mathematica and Matlab, but I dont have any idea about C,C++,C# languages. I want to learn one of the languages that they they are fast and exact to compute some arithmetic functions for large numbers(for example larger than $10^3000$). I asked somebody and he said he used C++ and he said I computed this sequence in less than 10 min. I want to know C, C++, C# and visual kind of theses programs and know which is better for my goal. Let $f$ be an arithmetic function and A={k1,k2,...,kn} are integers in increasing order. Now I want to start with k1 and compare f(ki) with f(k1). If f(ki)f(k1), put ki as k1. Now start with ki, and compare f(kj) with f(ki), for ji. If f(kj)f(ki), put kj as ki, and repeat this procedure. At the end we will have a sub sequence B={L1,...,Lm} of A by this property: f(L(i+1))f(L(i)), for any 1<=i<=m-1 I have written a code for this program with Mathematica, and it take some hours to compute f of ki's or the set B for large numbers. For example, let f is the divisor function of integers. Do you know how to write the code for my purpose in Mathematica or Matlab. Mathematica is preferable.

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  • Slow wired internet connection on Realtek RTL8168-8111 (Rev 6)

    - by Mark
    I keep on seeing issues people are having with their wireless. I am having an issue with being wired into my router. I installed Ubuntu 11.10 the other day, on my custom PC. The motherboard I have installed on this PC is an ASUS P8H61-M. The issue I am having is with my speed. I have a dual boot, windows 7 and the new Ubuntu. On my Windows install I am getting test speeds from Speakeasy at 17Mbps and actual downloads around 2-3MB/s. With Ubuntu, I am getting test speeds from Speakeasy at 1.14Mbps and actual downloads around 60KB/s. I have disabled IPv6 and am no using GoogleDNS for my DNS, but it hasn't resolved the issue. I have scanned my router (WRT54GS Linksys) to disable IPv6 connections, and I am not seeing any option for that. I cannot figure out why I am getting such sluggish internet connection. Any help to resolve would be great! I performed an iconfig -a with these results: mark@Mark-ASUS:~$ ifconfig -a eth0 Link encap:Ethernet HWaddr f4:6d:04:d1:2c:4e inet addr:192.168.1.103 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::f66d:4ff:fed1:2c4e/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:21888 errors:0 dropped:21888 overruns:0 frame:21888 TX packets:21068 errors:0 dropped:90 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:26348337 (26.3 MB) TX bytes:2217140 (2.2 MB) Interrupt:46 Base address:0xc000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:7 errors:0 dropped:0 overruns:0 frame:0 TX packets:7 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:952 (952.0 B) TX bytes:952 (952.0 B) My specs are: mark@Mark-ASUS:~$ sudo lspci -nn 04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller [10ec:8168] (rev 06) 06:00.0 PCI bridge [0604]: ASMedia Technology Inc. Device [1b21:1080] (rev 01) udev information: KERNEL[11.351405] add /devices/pci0000:00/0000:00:1c.2/0000:04:00.0/net/eth0 (net) UDEV_LOG=3 ACTION=add DEVPATH=/devices/pci0000:00/0000:00:1c.2/0000:04:00.0/net/eth0 SUBSYSTEM=net INTERFACE=eth0 IFINDEX=2 SEQNUM=1542 UDEV [11.363905] add /devices/pci0000:00/0000:00:1c.2/0000:04:00.0/net/eth0 (net) UDEV_LOG=3 ACTION=add DEVPATH=/devices/pci0000:00/0000:00:1c.2/0000:04:00.0/net/eth0 SUBSYSTEM=net INTERFACE=eth0 IFINDEX=2 SEQNUM=1542 ID_VENDOR_FROM_DATABASE=Realtek Semiconductor Co., Ltd. ID_MODEL_FROM_DATABASE=RTL8111/8168B PCI Express Gigabit Ethernet controller ID_BUS=pci ID_VENDOR_ID=0x10ec ID_MODEL_ID=0x8168 ID_MM_CANDIDATE=1 dmesg information: [ 2.855982] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded [ 2.856366] r8169 0000:04:00.0: eth0: RTL8168b/8111b at 0xffffc9000064c000, f4:6d:04:d1:2c:4e, XID 0c900800 IRQ 46 [ 12.540956] r8169 0000:04:00.0: eth0: link down [ 12.540961] r8169 0000:04:00.0: eth0: link down [ 12.541173] ADDRCONF(NETDEV_UP): eth0: link is not ready I took out a lot of information that did not pertain to eth0, because the previous edits wouldn't save. If I need any more information, let me know. I would love to get this resolved. The other issue I am noticing is sometimes my connection disconnects all together, for about a minute, then it reconnects.

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  • How can you Add Value to your Mobile Apps?

    - by Carlos Chang
    Author: Craig Mikus, Sr. Director, Enterprise Mobile Solutions Seems like every customer is either building or planning to build mobile apps, especially customer facing apps. Why? Inevitably, all companies want to improve the customer experience through more quality interactions that drive customer satisfaction, customer loyalty, new revenue streams, and even improve the way they service their customers. What better way than mobile apps? Right? But how can customers add more value to these mobile apps to drive more business benefit? Look closely, the answer just might be right in front of you. Still need another clue? What’s the first 4 letters of mobile – mo-bi? Or pronounced differently, More BI. That’s right – add more business intelligence to your overall mobile strategy. In today’s customer centric world where customer interactions and personalization are critical, it’s important to leverage a BI strategy that complements and feeds into your mobile strategy. For example, I was recently talking to a customer that was implementing a data warehouse project focused customer analytics. Their goal was to understand who are their best customers and why, develop customer profiles, identify customer trends & patterns, identify cross sell opportunities, and much more. The company then wanted to feed this information to marketing for targeted campaigns and programs. As we continued to talk, I asked my contact if they had plans to feed this information into their customer facing mobile apps to personalize the apps, target their interactions, and hopefully drive customer loyalty and new revenue streams? Two minutes later, my contact was calling his mobile development teams. So my advice to everyone, as you establish your enterprise mobile strategy and goals, remember that “mo-BI” is a critical component to add value to your mobile apps! So make sure you have “mo BI” in your mobile strategy. As I come to think of it, did you ever notice that Big Data also starts with BI?

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  • Questions about Code Reviews

    - by bamboocha
    My team plans to do Code Review and asked me to make a concept what and how we are going to make our Code Reviews. We are a little group of 6 team members. We use an SVN repository and write programs in different languages (mostly: VB.NET, Java, C#), but the reviews should be also possible for others, yet not defined. Basically I am asking you, how are you doing it, to be more precise I made a list of some questions I got: 1. Peer Meetings vs Ticket System? Would you tend to do meetings with all members, rather than something like a ticket system, where the developer can add a new code change and some or all need to check and approve it? 1. What tool? I made some researches on my own and it showed that Rietveld seems to be the program to use for non-git solutions. Do you agree/disagree and why? 2. A good workflow to follow? 3. Are there good ways to minimize the effort for those meetings even more? 4. What are good questions, every code reviewer should follow? I already made a list with some questions, what would you append/remove? are there any magic numbers in the code? do all variable and method names make sense and are easily understandable? are all querys using prepared statement? are all objects disposed/closed when they are not needed anymore? 5. What are your general experiences with it? What's important? Things to consider/prevent/watch out?

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  • Exadata X3, 11.2.3.2 and Oracle Platinum Services

    - by Rene Kundersma
    Oracle recently announced an Exadata Hardware Update. The overall architecture will remain the same, however some interesting hardware refreshes are done especially for the storage server (X3-2L). Each cell will now have 1600GB of flash, this means an X3-2 full rack will have 20.3 TB of total flash ! For all the details I would like to refer to the Oracle Exadata product page: www.oracle.com/exadata Together with the announcement of the X3 generation. A new Exadata release, 11.2.3.2 is made available. New Exadata systems will be shipped with this release and existing installations can be updated to that release. As always there is a storage cell patch and a patch for the compute node, which again needs to be applied using YUM. Instructions and requirements for patching existing Exadata compute nodes to 11.2.3.2 using YUM can be found in the patch README. Depending on the release you have installed on your compute nodes the README will direct you to a particular section in MOS note 1473002.1. MOS 1473002.1 should only be followed with the instructions from the 11.2.3.2 patch README. Like with 11.2.3.1.0 and 11.2.3.1.1 instructions are added to prepare your systems to use YUM for the first time in case you are still on release 11.2.2.4.2 and earlier. You will also find these One Time Setup instructions in MOS note 1473002.1 By default compute nodes that will be updated to 11.2.3.2.0 will have the UEK kernel. Before 11.2.3.2.0 the 'compatible kernel' was used for the compute nodes. For 11.2.3.2.0 customer will have the choice to replace the UEK kernel with the Exadata standard 'compatible kernel' which is also in the ULN 11.2.3.2 channel. Recommended is to use the kernel that is installed by default. One of the other great new things 11.2.3.2 brings is Writeback Flashcache (wbfc). By default wbfc is disabled after the upgrade to 11.2.3.2. Enable wbfc after patching on the storage servers of your test environment and see the improvements this brings for your applications. Writeback FlashCache can be enabled  by dropping the existing FlashCache, stopping the cellsrv process and changing the FlashCacheMode attribute of the cell. Of course stopping cellsrv can only be done in a controlled manner. Steps: drop flashcache alter cell shutdown services cellsrv again, cellsrv can only be stopped in a controlled manner alter cell flashCacheMode = WriteBack alter cell startup services cellsrv create flashcache all Going back to WriteThrough FlashCache is also possible, but only after flushing the FlashCache: alter cell flashcache all flush Last item I like to highlight in particular is already from a while ago, but a great thing to emphasis: Oracle Platinum Services. On top of the remote fault monitoring with faster response times Oracle has included update and patch deployment services.These services are delivered by Oracle Advanced Customer Support at no additional costs for qualified Oracle Premier Support customers. References: 11.2.3.2.0 README Exadata YUM Repository Population, One-Time Setup Configuration and YUM upgrades  1473002.1 Oracle Platinum Services

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  • Selecting the correct installer to install Oracle Weblogic Server

    - by PratikS -- Oracle
    When ever we start learning about a software product, the first step is to get the software installer and install it.Before we start with "How to install Oracle Weblogic Server?", lets understand the different kinds of installers available for Oracle Weblogic Server and select the correct installer.There are three different kinds of Weblogic server Installers: Package Installer Development-only and supplemental installers Upgrade Installer 1) Package Installer: If you have never installed Oracle Weblogic Server and this is the first time you are installing it, then what you need is a Oracle Weblogic Server's Package Installer.Again there are two different kinds of Package Installers:    a) Generic Package installer:         It does not include JAVA runtime. (When using "Generic Package installer" it is a prerequisite that a supported JDK should be installed)         If you want to install weblogic server with 64bit JVM, you have to use "Generic Package installer".         "Generic Package installer" is platform independent and can be used to install weblogic server on any supported 32bit or 64bit platform.     b) OS-specific Package installer         As the name suggests the installer is platform specific.         It is meant for installation with a 32bit JVM only.         Both SUN and JROCKIT 32 bit JDKs come bundled with "OS-specific Package installer", so no need to install the JDK in advance. 2) Development-only and supplemental installers:         If you have no plans to use the Oracle Weblogic Server in Production and need a simple installer for testing purpose only, then use this installer.         Download the zip distribution, unzip it and its ready to use. 3) Upgrade Installer:         Upgrade installer is used to upgrade a Oracle Weblogic Server installation from one minor version to a higher minor version.         There are no installers available to upgrade Oracle Weblogic Server Installation from one major version to another, though Domain Upgrade is always available. Note:Following are the different versions of Oracle Weblogic Server in ascending order(excluding versions before WLS 9.2): WLS 9.2.x WLS 10.0.x WLS 10.3.x WLS 12.1.x Where "x" denotes the minor version, 9.2, 10.0,10.3 and 12.1 are the major versions.So you may use the upgrade installer to upgrade from WLS 10.3.1 to 10.3.6, or 10.0.1 to 10.0.2 etc.  ------------------------------------- Important links to refer: Oracle Weblogic Server Documentation Supported Configuration Installation Guide for Oracle WebLogic Server

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  • When creating an library published on CodePlex, how "bad" would it be for the unit-test projects to rely on commercial products?

    - by Lasse V. Karlsen
    I have started a project on CodePlex for a WebDAV server implementation for .NET, so that I can host a WebDAV server in my own programs. This is both a learning/research project (WebDAV + server portion) as well as a project I think I can have much fun with, both in terms of making it and using it. However, I see a need to do mocking of types here in order to unit-testing properly. For instance, I will be relying on HttpListener for the web server portion of the WebDAV server, and since this type has no interface, and is sealed, I cannot easily make mocks or stubs out of it. Unless I use something like TypeMock. So if I used TypeMock in the unit-test projects on this library, how bad would this be for potential users? The projects are made in C# 3.5 for .NET 3.5 and 4.0, and the project files was created with Visual Studio 2010 Professional. The actual class libraries you would end up referencing in your software would of course not be encumbered with anything remotely like this, only the unit-test libraries. What's your thoughts on this? As an example, I have in my old code-base, which is private, the ability to just initiate a WebDAV server with just this: var server = new WebDAVServer(); This constructs, and owns, a HttpListener instance internally, and I would like to verify through unit-tests that if I dispose of this server object, the internal listener is disposed of. If, on the other hand, I use the overload where I hand it a listener object, this object should not be disposed of. Short of exposing the internal listener object to the outside world, something I'm a bit loath to do, how can I in a good way ensure that the object was disposed of? With TypeMock I can mock away parts of this object even though it isn't accessed through interfaces. The alternative would be for me to wrap everything in wrapper classes, where I have complete control.

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  • Which language is more suitable heavy file tasks?

    - by All
    I need to write a script (based on basic functions) to process /image/audio/video files. The process is mainly filesystem tasks and converts. The database of files has been stored by mysql. The script is simple but cause heavy tasks on the system; for example renaming/converting/copying thousands of file in a run. The script does not read the content of files into memory, it just manage the commands for sub-processes. The main weight is on the communication with filesystem. The script will be used regularly for new files. My concern is about performance. I am thinking of Shell script a complied language like C Please advise which programming language is more suitable for this purpose and why? UPDATE: An example is to scan a folder for images, convert them with ImageMagick, move files to destination folder, get file info, then update the database. As you can see, the process has no room for optimization, and most of languages have similar APIs for popular programs like ImageMagick, MySQL, etc. Thus, it can be written in any language. I just wish to reduce resource usage by speeding up the long loop. NOTE: I know that questions about comparing languages are not favorable, but I really had problem to choose, because the problems can appear in action.

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  • Be liberal in what you accept... or not?

    - by Matthieu M.
    [Disclaimer: this question is subjective, but I would prefer getting answers backed by facts and/or reflexions] I think everyone knows about the Robustness Principle, usually summed up by Postel's Law: Be conservative in what you send; be liberal in what you accept. I would agree that for the design of a widespread communication protocol this may make sense (with the goal of allowing easy extension), however I have always thought that its application to HTML / CSS was a total failure, each browser implementing its own silent tweak detection / behavior, making it near impossible to obtain a consistent rendering across multiple browsers. I do notice though that there the RFC of the TCP protocol deems "Silent Failure" acceptable unless otherwise specified... which is an interesting behavior, to say the least. There are other examples of the application of this principle throughout the software trade that regularly pop up because they have bitten developpers, from the top off my head: Javascript semi-colon insertion C (silent) builtin conversions (which would not be so bad if it did not truncated...) and there are tools to help implement "smart" behavior: name matching phonetic algorithms (Double Metaphone) string distances algorithms (Levenshtein distance) However I find that this approach, while it may be helpful when dealing with non-technical users or to help users in the process of error recovery, has some drawbacks when applied to the design of library/classes interface: it is somewhat subjective whether the algorithm guesses "right", and thus it may go against the Principle of Least Astonishment it makes the implementation more difficult, thus more chances to introduce bugs (violation of YAGNI ?) it makes the behavior more susceptible to change, as any modification of the "guess" routine may break old programs, nearly excluding refactoring possibilities... from the start! And this is what led me to the following question: When designing an interface (library, class, message), do you lean toward the robustness principle or not ? I myself tend to be quite strict, using extensive input validation on my interfaces, and I was wondering if I was perhaps too strict.

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  • Package Version Numbers, why are they so important

    - by Chris W Beal
    One of the design goals of IPS has been to allow people to easily move forward to a supported "Surface" of component. That is to say, when you  # pkg update your system, you get the latest set of components which all work together, based on the packages you already have installed. During development, this has meant simply you update to the latest "build" of the components. (During development, we build everything and publish everything every two weeks). Now we've released Solaris 11 using the IPS technologies, things are a bit more complicated. We need to be able to reflect all the types of Solaris release we are doing. For example Solaris Development builds, Solaris Update builds and "Support Repository Updates" (the replacement for patches) in the version scheme. So simply saying "151" as the build number isn't sufficient to articulate what you are running, or indeed what is available to update to In my previous blog post I talked about creating your own package, and gave an example FMRI of pkg://tools/[email protected],0.5.11-0.0.0 But it's probably more instructive to look at the FMRI of a Solaris package. The package "core-os" contains all the common utilities and daemons you need to use Solaris.  $ pkg info core-os Name: system/core-os Summary: Core Solaris Description: Operating system core utilities, daemons, and configuration files. Category: System/Core State: Installed Publisher: solaris Version: 0.5.11 Build Release: 5.11 Branch: 0.175.0.0.0.2.1 Packaging Date: Wed Oct 19 07:04:57 2011 Size: 25.14 MB FMRI: pkg://solaris/system/[email protected],5.11-0.175.0.0.0.2.1:20111019T070457Z The FMRI is what we will concentrate on here. In this package "solaris" is the publisher. You can use the pkg publisher command to see where the solaris publisher gets it's bits from $ pkg publisher PUBLISHER TYPE STATUS URI solaris origin online http://pkg.oracle.com/solaris/release/ So we can see we get solaris packages from pkg.oracle.com.  The package name is system/core-os. These can be arbitrary length, just to allow you to group similar packages together. Now on the the interesting? bit, the versions, everything after the @ is part of the version. IPS will only upgrade to a "higher" version. [email protected],5.11-0.175.0.0.0.2.1:20111019T070457Z core-os = Package Name0.5.11 = Component - in this case we're saying it's a SunOS 5.11 package, = separator5.11 = Built on version - to indicate what OS version you built the package on- = another separator0.175.0.0.0.2.1 = Branch Version : = yet another separator20111019T070457Z = Time stamp when the package was published So from that we can see the Branch Version seems rather complex. It is necessarily so, to allow us to describe the hierachy of releases we do In this example we see the following 0.175: is known as the trunkid, and is incremented each build of a new release of Solaris. During Solaris 11 this should not change  0: is the Update release for Solaris. 0 for FCS, 1 for update 1 etc 0: is the SRU for Solaris. 0 for FCS, 1 for SRU 1 etc 0: is reserved for future use 2: Build number of the SRU 1: Nightly ID - only important for Solaris developersTake a hypothetical example [email protected],5.11-0.175.1.5.0.4.1:<something> This would be build 4 of SRU 5 of Update 1 of Solaris 11 This is actually documented in a MOS article 1378134.1 Which you can read if you have a support contract.

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  • Inserting an Image into a PDF

    - by Cerin
    Are there Linux/Ubuntu programs capable of inserting a partially transparent image into a PDF? I'm trying to "sign" a PDF document by inserting an image of my signature, but even though every OSX and Windows PDF editor seems to support this, I haven't found any Linux PDF editors that do. I've tried PDFChain, PDF Editor, Flpsed PDF Annotator, Openoffice, Scribus, Krita, and PDFSam, and none support this. Although not technically a Linux program, I tried the site pdfescape.com, but it corrupts the images it inserts, rendering it useless for this task. Note, I'm talking about keeping the PDF in PDF format, so rasterizing it to a TIF/PNG/BMP, editing it in Gimp, and then dumping it back into a PDF isn't a solution. EDIT: I might have been premature in my criticism of pdfescape.com and PDF Editor. I was viewing the resulting PDF in Evince, which was showing a mangled image, but when I opened the PDF in PDF Editor, the image rendered correctly. I've since sent the PDF to someone on Windows who confirmed the image showed correctly. It looks like the problem might be inaccurate rendering with Evince.

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  • Which software to keep track of my project?

    - by Exa
    I'm about to start the first real phase of my game development which will consist of the acquisition of information, resources and the definition of where I want to go and what I will need for that. I just want to make sure that I'm prepared as best as possible before I actually start development. I don't like the thought of using Microsoft Word or Excel for my project management... I already worked with MS Project but I don't think it fits my needs. I need a software where I can easily maintain project steps, milestones, important issues, information about technologies and engines I use, as well as simple notes and thoughts I just want to write down. I usually prefer a whiteboard for stuff like that but unfortunately it's not a persistent way of storing. ;) Also writing it down the old-school way is something I can think of, but only for quick notes... Which software do you use for that? Are there commonly used programs? Is there any free software at all?

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  • Tried teaching myself to program before college, accidently overwhelmed myself, tips?

    - by Gunnar Keith
    I'm sixteen, I'm overly interested in programming, and I'm currently taking IT classes during my mornings in high school. Last year, I tried teaching myself to code. It was quite exciting, but all I did was watch TheNewBoston's videos on YouTube for Python. After his tutorials, I just did research, made some CMD programs, and that's it. After that, I got cocky and got my feet wet in many other languages. Java, C++, C#, Perl, Ruby... and it overwhelmed me. Which made it less fun to code. I want to go to college for a 2 year programming course. And I want to make writing code my profession. But how do you recommend I attack re-learning it all again? Start with Python? Don't even try? Also, I'm not 100% in math, but I'm good friends with a lot of programmers, who say they suck at math, but manage to code just fine. I'm not looking for negative feedback. I just want the proper head-start on things before college.

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  • Podcast Show Notes: DevOps and Continuous Integration

    - by Bob Rhubart
    The topic on the table for the latest OTN ArchBeat series of programs is DevOps. The panelists for this conversation are three gentlemen who, by no small coincidence, have some expertise on the topic. The Panel Tim Hall is the Senior Director of product management for Oracle Enterprise Repository and Oracle’s Application Integration Architecture. Robert Wunderlich is Principal Product Manager for Oracle’s Application Integration Architecture Foundation Pack. Peter Belknap is director of product management for SOA Integration at Oracle. The Conversation Listen to Part 1: DevOps and Continuous Integration: The Basics The panel discusses why DevOps matters and how it changes development methodologies and organizational structure. Listen to Part 2: DevOps and the Evolution of Enterprise IT (Dec 20) The panel discusses where DevOps fits with cloud computing and other evolutionary changes in enteprise IT. Listen to Part 3: Tech, Talk, and Territorialism (Dec 27) The panel closes out the discusses with a look at DevOps-friendly technologies and the impact of DevOps on communication and governance. Coming Soon Early in the new year OTN ArchBeat will bring you an update on the Oracle Cloud, with details on how you can test drive the Java and Database cloud services. Stay tuned: RSS

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  • CodePlex Daily Summary for Saturday, February 26, 2011

    CodePlex Daily Summary for Saturday, February 26, 2011Popular ReleasesDirectQ: Release 1.8.7 Beta 2: Beta 2 release to fix some early reported problems with the original 1.8.7 Beta.Chiave File Encryption: Chiave 0.9.2: Release Notes Application for file encryption and decryption using 512 Bit rijndael encyrption algorithm with simple to use UI. Its written in C# and compiled in .Net version 3.5. It incorporates features of Windows 7 like Jumplists, Taskbar progress and Aero Glass. Now with added support to Windows XP! Change Log from 0.9.1 to 0.9.2: ==================== Added: > Now it displays number of files added in the wizard to the Window Title bar. > Added support to Windows XP. > Minor UI tweaks. I...Claims Based Identity & Access Control Guide: Drop 1 - Claims Identity Guide V2: Highlights of drop #1 This is the first drop of the new "Claims Identity Guide" edition. In this release you will find: All previous samples updated and enhanced. All code upgraded to .NET 4 and Visual Studio 2010. Extensive cleanup. Refactored Simulated Issuers: each solution now gets its own issuers. This results in much cleaner and simpler to understand code. Added Single Sign Out support. Added first sample using ACS ("ACS as a Federation Provider"). This sample extends the ori...HFR7 - Forum Hardware.fr pour Windows Phone 7: HFR7 - v1.1.1: NOUVELLES FONCTIONS : - Aucune. AMÉLIORATIONS : - La page "Catégories" est désormais intégrée au pivot "Bienvenue". - Apparition de boutons de changement de page en bas du sujet en consultation. - Les en-têtes sur les sujets sont désormais de la même couleur que la couleur d'accentuation de votre téléphone. BUGFIXES : - Les catégories s'affichent correctement. - Cliquer sur le bouton "drapeau" alors qu'on est dans la liste des topics d'une page n'amenait pas directement au dernier post non ...Simple Notify: Simple Notify Beta 2011-02-25: Feature: host the service with a single click in console Feature: host the service as a windows service Feature: notification cient application Feature: push client application Feature: push notifications from your powershell script Feature: C# wrapper libraries for your applicationsMono.Addins: Mono.Addins 0.6: The 0.6 release of Mono.Addins includes many improvements, bug fixes and new features: Add-in engine Add-in name and description can now be localized. There are new custom attributes for defining them, and can also be specified as xml elements in an add-in manifest instead of attributes. Support for custom add-in properties. It is now possible to specify arbitrary properties in add-ins, which can be queried at install time (using the Mono.Addins.Setup API) or at run-time. Custom extensio...patterns & practices: Project Silk: Project Silk Community Drop 3 - 25 Feb 2011: IntroductionWelcome to the third community drop of Project Silk. For this drop we are requesting feedback on overall application architecture, code review of the JavaScript Conductor and Widgets, and general direction of the application. Project Silk provides guidance and sample implementations that describe and illustrate recommended practices for building modern web applications using technologies such as HTML5, jQuery, CSS3 and Internet Explorer 9. This guidance is intended for experien...PhoneyTools: Initial Release (0.1): This is the 0.1 version for preview of the features.Minemapper: Minemapper v0.1.5: Now supports new Minecraft beta v1.3 map format, thanks to updated mcmap. Disabled biomes, until Minecraft Biome Extractor supports new format.Smartkernel: Smartkernel: ????,??????Coding4Fun Tools: Coding4Fun.Phone.Toolkit v1.2: New control, Toast Prompt! Removed progress bar since Silverlight Toolkit Feb 2010 has it.Umbraco CMS: Umbraco 4.7: Service release fixing 31 issues. A full changelog will be available with the final stable release of 4.7 Important when upgradingUpgrade as if it was a patch release (update /bin, /umbraco and /umbraco_client). For general upgrade information follow the guide found at http://our.umbraco.org/wiki/install-and-setup/upgrading-an-umbraco-installation 4.7 requires the .NET 4.0 framework Web.Config changes Update the web web.config to include the 4 changes found in (they're clearly marked in...HubbleDotNet - Open source full-text search engine: V1.1.0.0: Add Sqlite3 DBAdapter Add App Report when Query Cache is Collecting. Improve the performance of index through Synchronize. Add top 0 feature so that we can only get count of the result. Improve the score calculating algorithm of match. Let the score of the record that match all items large then others. Add MySql DBAdapter Improve performance for multi-fields sort . Using hash table to access the Payload data. The version before used bin search. Using heap sort instead of qui...Silverlight????[???]: silverlight????[???]2.0: ???????,?????,????????silverlight??????。DBSourceTools: DBSourceTools_1.3.0.0: Release 1.3.0.0 Changed editors from FireEdit to ICSharpCode.TextEditor. Complete re-vamp of Intellisense ( further testing needed). Hightlight Field and Table Names in sql scripts. Added field dropdown on all tables and views in DBExplorer. Added data option for viewing data in Tables. Fixed comment / uncomment bug as reported by tareq. Included Synonyms in scripting engine ( nickt_ch ).IronPython: 2.7 Release Candidate 1: We are pleased to announce the first Release Candidate for IronPython 2.7. This release contains over two dozen bugs fixed in preparation for 2.7 Final. See the release notes for 60193 for details and what has already been fixed in the earlier 2.7 prereleases. - IronPython TeamCaliburn Micro: A Micro-Framework for WPF, Silverlight and WP7: Caliburn.Micro 1.0 RC: This is the official Release Candicate for Caliburn.Micro 1.0. The download contains the binaries, samples and VS templates. VS Templates The templates included are designed for situations where the Caliburn.Micro source needs to be embedded within a single project solution. This was targeted at government and other organizations that expressed specific requirements around using an open source project like this. NuGet This release does not have a corresponding NuGet package. The NuGet pack...Caliburn: A Client Framework for WPF and Silverlight: Caliburn 2.0 RC: This is the official Release Candidate for Caliburn 2.0. It contains all binaries, samples and generated code docs.Rawr: Rawr 4.0.20 Beta: Rawr is now web-based. The link to use Rawr4 is: http://elitistjerks.com/rawr.phpThis is the Cataclysm Beta Release. More details can be found at the following link http://rawr.codeplex.com/Thread/View.aspx?ThreadId=237262 As of the 4.0.16 release, you can now also begin using the new Downloadable WPF version of Rawr!This is a pre-alpha release of the WPF version, there are likely to be a lot of issues. If you have a problem, please follow the Posting Guidelines and put it into the Issue Trac...Windows Phone 7 Isolated Storage Explorer: WP7 Isolated Storage Explorer v1.0 Beta: Current release features:WPF desktop explorer client Visual Studio integrated tool window explorer client (Visual Studio 2010 Professional and above) Supported operations: Refresh (isolated storage information), Add Folder, Add Existing Item, Download File, Delete Folder, Delete File Explorer supports operations running on multiple remote applications at the same time Explorer detects application disconnect (1-2 second delay) Explorer confirms operation completed status Explorer d...New Projectsconvert digit to word upto thousand: convert digit to word upto thousandCustom XSLT with recursive loop in Biztalk 2009: Custom XSLT with recursive loop in Biztalk 2009ECO contrib: ECO ist a excellent framework for domain driven design developed by CapableObjects AB. Share your additional features in this contrib project.euler21: euler 21euler22: euler 22 problemflowless: Some workflow thingHFR7 - Forum Hardware.fr pour Windows Phone 7: HFR7 vous permet de surfer sur le forum de Hardware.fr via votre Windows Phone. Il est développé sous Silverlight (C#/XAML).ISP.NET: ISP.NET is a code level verification tool for MPI programs. It includes a Visual Studio 2010 extension that allows for push button verification of user programs that are written in C, C++ and C#. ISP checks for deadlocks, assertion violations, and other MPI program issues. IVY Frameworks: Ivy Frameworks is an architectural framework to create multi-tire application in a consistent way. We are creating specific application blocks. When completed it will help to create a software development pattern, to mass produce .Net applications in a software factory model. Jobeet: Just another Symfony Tutorial I'm following.Lurity: Project Codename "Lurity".Metro Toolkit: Metro ToolkitMySchoolManager: MySchoolManager es un programa de fines didácticos, de código fuente abierto y documentado en español, que simula un sistema de administración del personal de una escuela. NewRapp: Project at KTH in course DD2388NHibernateCMS: NHibernateCMSParametero - Yet Another Console Arguments Parsing Library: Parametero - Yet Another Console Arguments Parsing LibraryRasifiel's test: Test projectSilverlight Gantt Chart: Don't waste time creating your own Gantt Chart. We've already done it!SKWebSite: This is my first ASP.NET MVC3 projectTechChat: TechChat is a ASP.net AJAX based stylish chat room. It demonstrates the use of database and use of AJAX. It is developed in VB.netUDK Development Kit Addons: UDK Development Kit Addons makes it easier for UDK users to develop and debug UDK scripts. It's developed in C# with using Visual Studio Shell.UltraLight.mvvm Windows Phone 7 MVVM Framework: A lightweight (< 300 lines, < 25KB) framework for developing MVVM Silverlight applications with support for tombstoning on the Windows Phone 7.Website Panel: Website PanelxMS (eXtensible Management System): The xMS is a simple console that can be extended using plugins. Those plugins can be written by developers using a simple interface. It's a good starting for who want to develop a plugin based application.Xna Midi Project: A project that will allow midi functionality using only the compact framework for windows and Xbox solutions.

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  • OpenGL profiling with AMD PerfStudio 2

    - by Aurus
    I'm rendering just a really small amount of polygons for my UI but however I still tried to increase the FPS. In the end I removed redundant calls which increased the FPS. I really don't want to lose FPS for nothing so I keep looking for more improvements. The first thing I noticed is the "huge" time where no calls are made before SwapBuffer (the black one). Well I know that OpenGL works asynchronous so SwapBuffer has to wait until everything is done. But shouldn't PerfStudio mark this time also as black ? Correct me If I am wrong. The second thing I noticed is that some glUniform2f calls just take longer (the brown ones). I mean they should all upload 2floats to the GPU how can the time be so different from call to call. The program isn't even changed or something like that. I also tried to look at other programs like gDebugger or CodeXL but they often crashed and they show less statistics (only # of calls or redundant calls etc.) EDIT: I also realized that the draw calls also have different durations, which was obvious for me but sometimes drawing more vertices is faster than drawing less vertices.

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  • Radeon 9200 Driver?

    - by usuhh86
    I've been using Linux for a while, but haven't really done more than installed programs. I have Ubuntu 12.04 with an ATI Radeon 9200 graphics card. Ubuntu didn't recognize it during the install. All I want is a driver. Preferably the proprietary driver, but I'll settle for an open-source one if I need to. I went to the AMD support website, and whenever I click on the download link for "ATI Proprietary Linux x86 Display Driver 8.28.8" I get redirected to the main AMD website. I tried this on Firefox, Chrome, even booted up my netbook and tried it on IE9. Does anybody have a download link? And if not, a link to download an open-source alternative? Any help will be greatly appreciated. I'm pretty much still a newbie at this. OpenGL vendor string: Tungsten Graphics, Inc. OpenGL renderer string: Mesa DRI R200 (RV280 5961) x86/MMX/SSE2 TCL DRI2 OpenGL version string: 1.3 Mesa 8.0.2 Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: no GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: no Unity 3D supported: no

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  • LibreOffice hangs everytime I click into it

    - by Freddy
    I've searched askubuntu for a solution but couldn't find anything helpful for me. I installed the latest version of ubuntu (13.10; 64-bit) yesterday (so I'm relatively new and unexperienced about it) and some programs as well. Today I wanted to try the LibreOffice package which comes with ubuntu by default. So I first started LO Impress, it showed me the default slide where it says something like "Add your title/text here" (I don't know exactly, I'm using my system in German). As soon as i clicked on this text, my entire system didn't react, I couldn't even click the stuff in the upper right corner (where the date, shutdown functions etc. are), nor the items on the launcher bar on the left. After 10 seconds or so, everything seemed to work properly again. But when I clicked into the LO Impress again, the same procedure as described happened again (cmpletely stuck for about 10 sec). Anybody got a solution for this? If you need more information, just tell me. Thanks in advance!

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  • CheckMemoryAllocationGame Sample

    - by Michael B. McLaughlin
    Many times I’ve found myself wondering how much GC memory some operation allocates. This is primarily in the context of XNA games due to the desire to avoid generating garbage and thus triggering a GC collection. Many times I’ve written simple programs to check allocations. I did it again recently. It occurred to me that many XNA developers find themselves asking this question from time to time. So I cleaned up my sample and published it on my website. Feel free to download it and put it to use. It’s rather thoroughly commented. The location where you insert the code you wish to check is in the Update method found in Game1.cs. The default that I put in is a line of code that generates a new Guid using Guid.NewGuid (which, if you’re curious, does not create any heap allocations). Read all of the comments in the Update method (at the very least) to make sure that your code is measured properly. It’s important to make sure that you meaningfully reference any thing you create after the second call to get the memory or else (in Release configuration at least) you will likely get incorrect results. Anyway, it should make sense when you read the comments and if not, feel free to post a comment here or ask me on Twitter. You can find my utilities and code samples page here: http://www.bobtacoindustries.com/developers/utils/Default.aspx To download CheckMemoryAllocationGame’s source code directly: http://www.bobtacoindustries.com/developers/utils/CheckMemoryAllocationGame.zip (If you’re looking to do this outside of the context of an XNA game, the measurement code in the Update method can easily be adapted into, e.g., a C# Windows Console application. In the past I mostly did that, actually. But I didn’t feel like adding references to all the XNA assemblies this time and… anyway, if you want you can easily convert it to a console application. If there’s any demand for it, I’ll do it myself and update this post when I get a chance.)

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  • Reverse WiFi to Broadcast connection coming from a USB device

    - by Daniel Clem
    I am using the app called Clockworkmod Tether. It connects using a script ( command line " gksu ./run.sh " ) on the computer. All my programs connect to the internet perfectly, minitube, midori, transmission torrents. But the network manager does not show any connection, wired or wireless. So this may cause issues? What I want to do is take this connection, and be able to share it some way, any way, by wireless. This Acer Timeline "Aspire 5810TZ" does have an Ethernet, so wired out to a router might be an option. But I would prefer to simply reverse the Wireless card to broadcast out to about 2 or 3 devices. Is this possible? Yes I have taken a look at the other questions already posted here, but the answers are 1 year old or older, and not clear at all. I am moderately comfortable (4.5 out of 10 ) on the command line. But pretty much need line by line directions for what commands are needed and what order, ect. Edit I have already tried the method of "Left click network manager, Create New Wireless Network" It is created fine, and I am able to connect to it with a tablet, but am un-able to get an outside connection with it. Using the "Shared to other computers" option because DHCP doesn't seem to work, and WEP Passphrase Security. I get an IP address on the connected device. But as I said, won't bring up any outside webpages or the like. So perhaps this is the wrong approach?

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  • Regular Expressions Cookbook Code Samples

    - by Jan Goyvaerts
    %COOKBOOKFRAME% One of the common criticisms against the first edition was that we didn’t have the regular expressions and code samples available for download. Since our book only has very short code snippets rather than complete programs, we (the authors) did not have these available as separate files either. But for the second edition we’re trying to do better. You can now download the code samples from the 2nd edition of Regular Expressions Cookbook. This HTML file contains all the blocks with regular expressions and source code from the book, along with the titles of the chapters, recipes, and sections that they are found in. If you have purchased the book, you can use this file to easily copy and paste the regular expressions and source code snippets. Even if you purchased the ebook, you may prefer to use this file. The regexes in the ebook are formatted with line breaks and gray dots for spaces to make them easier to read in print. The HTML file does not use such formatting, so you can copy and paste them directly. This means that some very regexes will run beyond the edge of your browser window.

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