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  • Why is math taught "backwards"? [closed]

    - by Yorirou
    A friend of mine showed me a pretty practical Java example. It was a riddle. I got excited and quickly solved the problem. After it, he showed me the mathematical explanation of my solution (he proved why is it good), and it was completely clear for me. This seems like natural approach for me: solve problems, and generalize. This is very familiar to me, I do it all the time when I am programming: I write a function. When I have to write a similar function, I generalize the problem, grab the generic parts, and refactor them to a function, and solve the original problems as a specialization of the general function. At the university (or at least where I study), things work backwards. The professors shows just the highest possible level of the solutions ("cryptic" mathematical formulas). My problem is that this is too abstract for me. There is no connection of my previous knowledge (== reality in my sense), so even if I can understand it, I can't really learn it properly. Others are learning these formulas word-by-word, and get good grades, since they can write exactly the same to the test, but this is not an option for me. I am a curious person, I can learn interesting things, but I can't learn just text. My brain is for storing toughts, not strings. There are proofs for the theories, but they are also really hard to understand because of this, and in most of the cases they are omitted. What is the reason for this? I don't understand why is it a good idea to show the really high level of abstraction and then leave the practical connections (or some important ideas / practical motivations) out?

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  • Getting around the FAT32 4GB file size limit

    - by Aesir
    I recently purchased a 32GB USB 3 stick that was formatted FAT32. I plugged it into my computer and attempted to copy a film onto it, the file was over 4GB however and it would not let me copy the file across because of the 4GB file size limit imposed by FAT32. After some googling I found that I could format my USB stick to have an exFAT format which would mean I could put files onto the stick greater than 4GB in size and the drive would work on both my Mac and my PC. The problem with this solution is that my PS3 cannot detect the USB stick when it is formatted with exFAT. I would like to know if there is a way I can have my USB stick formatted so it can have files greater than 4 GB and work on my PC, Mac and PS3.

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  • Drivers and Codec Compilations

    - by Pennf0lio
    Hi, Do you know any software or compilations that you recommend to handle drivers and codecs for newly formated computer? I am having problem gathering drivers and codecs when I format my computer or other's computer because we frequently misplace it's original drivers. I need an offline solution that doesn't need internet. Same for as the codec, when formating computer we frequently lost our codecs, are there codec packs you know that you would like to recommend? P.s. I had tried driver bot but it's only good when your online, I'm looking for a complete package that has all the driver to most common hardware (eg. Monitor, Sound, etc). Thanks!

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  • Automatic syncing USB HD drive to local HD (different computers)

    - by luri
    I have a desktop PC at work, and a laptop at home.... or elsewhere. What I want to do is use a USB HD to store my documents (about 130 Gb, maybe more). That would serve as backup and also port my files to my laptop. I'd like any of both computers to automatically sync all files there with local copies, so that I can work at either of them and keep updated copies of everything in both (plus the USB drive, which would allow me to work in other computers, too, apart from being another backup). Dropbox ins't a solution for me, due to pricing and 100Gb limit. The workflow would be as follows, to clear things up: I work on PC1. Changes in files are automatically synced to USB whenever a file is modified. I go home and boot PC2. I plug the usb drive and local files are synced (if changed) with the most recent usb copies. While I work at PC2, again, changes in files spread to my USB drive. Whenever I go to PC1 again, I plug my usb and again everything synces. So the questions would be: a) Am I crazy? b) Can it be done? c) Will I have any file conflicts (provided I'm the only one that will modify the files)?

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  • Find largest value of integer in repeating string

    - by dotancohen
    I have a script log file that looks a bit like this: 2012-9-16 Did something Did 345 things Script time: 244 seconds 2012-9-17 Did yet something Did another thing 23 times Script time: 352 seconds 2012-9-18 Did something special for 34 seconds 51 times Did nothing at all Script time: 122 seconds I would like to find the largest value of N in the lines Script time: N seconds. However, I need to keep the context, so simply removing all lines that don't contain Script time in them is not a viable solution. Currently, I am grepping for lines with Script time, then sorting those to find the highest value, then going back to the original file and searching for that value. However, if there is a more straightforward way then I would love to know. This is on Vim 7.3 on a recent CentOS. I would prefer to remain in VIM if possible. Thanks.

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  • Active Directory Replication across Sites slow or not working

    - by neildeadman
    I've just inherited (isn't it always the way!) a Windows Domain. The domain is spread across 2 sites. Site01 has 3 DCs & Site02 has 2 DCs. If I create a user in either site, the other DCs in that site, immediately replicate and show the new user. The new user is not shown in the other site though. If I manually run the following command, everything syncs and the new user appears: repadmin /syncall issdc01 /APed In the Inter-Site Transports DEFAULTIPSITELINK the replicate every time value is set to 180 minutes. I thought this was the solution, but on another Windows Domain, this is the same, but replication takes place across sites immediately. What can I check to resolve this issue? We are running Windows Server 2008 Results of dcdiag /test:dns show a server that is no longer part of our domain: TEST: Delegations (Del) Error: DNS server: oldserver.win.domain.com IP: [Missing glue A record]

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  • Restrict access to SSH for one specific user

    - by j0nes
    I am looking for a way to secure my servers with the following setup: I have a server where I can log in via SSH. The main account there (named "foo") is secured by a keybased login with password. I have another user account (named "bar") that I use to log in via cronjobs running on other servers - this one also has keybased login, but without password. Now I want to limit access to this machine for the "bar" account. The account should only be accessible via known IPs. However, the "foo" account should not be affected by this, this one should basically be accessible from any IP. How can I manage this? Or is there a simpler solution to everything?

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  • New CAM Editor v2.3 with Open-XDX for Open Data APIs

    - by drrwebber
    Creating actual working XML exchanges, loading data from data stores, generating XML, testing, integrating with web services and then deployment delivery takes a lot of coding and effort. Then writing the documentation, models, schema and doing naming and design rule (NDR) checks and packaging all this together (such as for NIEM IEPD use). What if there was a tool that helped you do all that easily and simply? Welcome to the new Open-XDX and the CAM Editor! Open-XDX uses code-free techniques in combination with CAM templates and visual drag and drop to rapidly design your XML exchange. Then Open-XDX will automatically generate all the SQL for you, read the database data, generate and populate the valid output XML, and filter with parameters. To complete the processing solution Open-XDX works with web services and JDBC database connections as a callable module that can be deployed plug and play with your middleware stack, all with just a few lines of Java code (about 5 actually). You can build either Query/Response or Publish/Subscribe services from existing data stores to XML literally in minutes. To see a demonstration of using Open-XDX, a MySQL data store and integrating with Oracle Web Logic server please see this short few minutes video - http://youtube.com/user/TheCameditor There is also a Quick Guide available that provides more technical insights along with a sample pack download of templates and SQL that you can try for yourself. Head on over to our project resource site to learn more, download the latest CAM Editor and see links to all the resources and materials. We look forward to seeing how the developer community is able to jump start information sharing initiatives using this new innovative approach.

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  • Question about a simple design problem

    - by Uri
    At work I stumbled uppon a method. It made a query, and returned a String based on the result of the query, such as de ID of a customer. If the query didn't return a single customer, it'd return a null. Otherwise, it'd return a String with the ID's of them. It looked like this: String error = getOwners(); if (error != null) { throw new Exception("Can't delete, the flat is owned by: " + error); } ... Ignoring the fact that getCustomers() returns a null when it should instead return an empty String, two things are happening here. It checks if the flat is owned by someone, and then returns them. I think a more readable logic would be to do this: if (isOwned) { throw new Exception("Can't delete, the flat is owned by: " + getOwners()); } ... The problem is that the first way does with one query what I do with two queries to the database. What would be a good solution involving good design and efficiency for this?

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  • How would I batch rename a lot of files using command-line?

    - by Whisperity
    I have a problem which I am unable to solve: I need to rename a great dump of files using patterns. I tried using this, but I always get an error. I have a folder, inside with a lot of files. Running ls -1 | wc -l, it returns that I have like 160000 files inside. The problem is, that I wish to move these files to a Windows system, but most of them have characters like : and ? in them, which makes the file unaccessible on said Windows-based systems. (As a "do not solve but deal with" method, I tried booting up a LiveCD on the Windows system and moving the files using the live OS. Under that Ubuntu, the files were readable and writable on the mounted NTFS partition, but when I booted back on Windows, it showed that the file is there but Windows was unable to access it in any fashion: rename, delete or open.) I tried running rename 's/\:/_' * inside the folder, but I got Argument list too long error. Some search revealed that it happens because I have so many files, and then I arrived here. The problem is that I don't know how to alter the command to suit my needs, as I always end up having various errors like Trying find -name '*:*' | xargs rename : _, it gives xargs: unmatched single quote; by default quotes are special to xargs unless you use the -0 option [\n] syntax error at (eval 1) line 1, near ":" [\n] xargs: rename: exited with status 255; aborting Adding the -0 after xargs turns the error message to xargs: argument line too long These files are archive files generated by various PHP scripts. The best solution would be having a chance to rename them before they are moved to Windows, but if there is no way to do it, we might have a way to rename the files while they are moved to Windows. I use samba and proftpd to move the files. Unfortunately, graphical software are out of the question as the server containing the files is what it is, a server, with only command-line interface.

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  • Sell More, Know More, Grow More with Oracle Sales Cloud - Webcast Oct 22nd

    - by Richard Lefebvre
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Today’s sales reps spend 78 percent of their time searching for information and only 22 percent selling. This inefficiency is costing you, your reps, and every prospect that stands to benefit from your products.  Join Oracle’s Thomas Kurian and Doug Clemmans as they explain: • How today’s sales processes have rendered many CRM systems obsolete • The secrets to smarter selling, leveraging mobile, social, and big data • How Oracle Sales Cloud enables smarter selling—as proven by Oracle’s own implementation of the solution Oracle experts will demo Oracle Sales Cloud to show you smarter selling in action. With Oracle Sales Cloud, reps sell more, managers know more, and companies grow more.  Date: Tuesday, October 22, 2013 Time: 18.00 CEST / 05.00 pm BST Free of Charge - Register here /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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  • thick client migration to web based application

    - by user1151597
    This query is related to application design the technology that I should consider during migration. The Scenario: I have a C#.net Winform application which communicates with a device. One of the main feature of this application is monitoring cyclic data(rate 200ms) sent from the device to the application. The request to start the cyclic data is sent only once in the beginning and then the application starts receiving data from the device until it sends a stop request. Now this same application needs to be deployed over the web in a intranet. The application is composed of a business logic layer and a communication layer which communicates with the device through UDP ports. I am trying to look at a solution which will allow me to have a single instance of the application on the server so that the device thinks that it is connected as usual and then from the business logic layer I can manage the clients. I want to reuse the code of the business layer and the communication layer as much as possible. Please let me know if webserives/WCF/ etc what i should consider to design the migration. Thanks in advance.

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  • Network connectivity issues with Windows Store

    - by Duy Tran
    I have my Windows 8 Pro build 9200 installed on my Dell laptop. I want to install some new apps and updates from the Store but there might be some network problem that caused the downloading gauge showing up but not really running at all. I followed some instructions that switched from local user to my Microsoft account, but this "Please wait" screen keeps showing and I don't really know why. I still have internet access and can use some apps like People, Mail, etc. with my account logged in, I can surf the net using Firefox, Chrome and Internet Explorer. I did another test using cmd with ping -t google.com and it showed that my laptop has internet access. Anybody knows a solution to make the Store working properly? Or is there any workaround to switch to the Microsoft account instead of a local user account?

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  • How To: Transfer Categories in Outlook 2007 from One Installation to Another Using Google Sync

    - by nicorellius
    I use Outlook 2007 for email. I also happen to use the categories for organizing my mail. This function is cool, because you can use keyboard shortcuts that make categorizing mail quick and easy. The problem I am having is that, since I use Google Apps Sync at home and at work, I can't seem to figure out how to transfer the existing category assignments that I spent months creating at work. As my email comes and goes, I assign this and that, with thousands of messages all belonging to specific categories. When I finally installed and started using Google Apps Sync at home, the synchronization process works great, but all my messages are blank, i.e., don't have the color categories I assigned at work. What's worse, I actually changed computers at work, and now am facing the same problem on the new workstation. Using: Windows XP Pro, Outlook 2007, Google Apps. Anyone run into this and find a solution?

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  • How do I apply 2 rotations about different points to a single primitive using OpenGL

    - by Fenoec
    I'm working on a 2D top-down shooter game that has a rotation feature like Realm Of The Mad God such that if you press e the camera rotates around the character in a clockwise direction and q rotates the camera around the character in a counterclockwise direction. I have this working with my floors and walls by translating to the character, doing the screen rotation, and drawing everything with the character as the origin. The problem arises when I shoot projectiles which need to both rotate around the character and rotate around themselves (shooting uses the mouse cursor so I can shoot at any angle). For example, if the screen is not rotated and I'm shooting rectangular projectiles, I want them to face in the direction I'm shooting (rotation around themselves). However if I only do this rotation, when I then rotate the screen the projectiles will always shoot at the same position because my cursor position does not change. Therefore I need to also either rotate the projectiles around the character or rotate the mouse cursor position to get the correct position (which would then totally screw up all of the collision detection). Likewise if I only do the screen rotation on projectiles, the rectangles will always be facing the same way and they would only look correct if I were shooting straight up or straight down. So my question is, how can I perform 2 rotations on a primitive around 2 different points? The only way I can think of is to translate to the character and do the screen rotation, then somehow calculate the translation required to move back to the middle of the projectile (seeing as how my axes are now rotated) and do its rotation. Or am I thinking about this in the wrong way and there is a different solution to accomplishing this effect?

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  • Excel CSV import treating quoted strings of numbers as numeric values, not strings

    - by MichaelOryl
    I've got a web application that is exporting its data to a CSV file. Here's one example row of the CSV file in question: 28,"65154",02/21/2013 00:00,"false","0316295","8316012,8315844","MALE" Since I can't post an image, I'll have to explain the results in Excel. The "0316295" field gets turned into a number and the leading 0 goes away. The "8316012,8315844" gets interpreted as one single number: 83,160,128,315,844. That is, most obviously, not the intended result. I've seen people recommend a leading single quote for such cases, but that doesn't really work either. 28,"65154",02/21/2013 00:00,"false","'0316295","'8316012,8315844","MALE" The single quote is visible at all times in the cell in Excel, though if I enter a number with a leading single quote myself, it shows just the intended string and not the single quote with the string. Importing is not the same as typing, it seems. Anybody have a solution here?

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  • Deleting Time Machine in Mac OS X 10.6.4

    - by cappuccino
    Does anyone know how to delete Time Machine in Mac OS X 10.6.4? Before answering: sudo rm -rf /whateverthetimemachineis does not work Disabling the ACL permissions first with sudo fsaclctl -p /whatever -d does not work, sudo: fsaclctl: command not found Use the delete all backup feature in Time Machine... this is slow as hell, would take days. Need a command line solution. No I don't want to reformat the drive, I have other content on it, and no don't say I should have separated on two partition or two drives, I did it this say since partitions cannot be dynamically changed, and two drives is annoying since, whats the point of having a big drive?... plus has no relation to the issue at hand. Already googlied for hours and read everything on Super User, nothing working. and all solutions are the first 4. Any clues?

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  • Deploy Jetty as port 80 daemon on Linux

    - by McKAMEY
    I'm curious what techniques you Linux admin gods are using to manage your Jetty deployments. I come from a Windows Server background so I'm still getting used to all of this. I've been looking for a good solution for deploying Jetty instances as port 80 on a Linux installation. So far I've seen this thread which allows Jetty to run as a daemon: http://jira.codehaus.org/browse/JETTY-458 And I've seen this thread which talks about alternates for setting up on port 80: http://wiki.eclipse.org/Jetty/Howto/Port80 These all seemed kind of hacky. Surely there is a relatively standard way of deploying a web server like Jetty on Linux. I'm currently using CentOS 5.5 but open to other distros. Thanks in advance.

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  • Thinkpad W510 with default graphics drivers shows weird brightness issues

    - by Chantz
    Hey guys, I am currently running 10.10 - 32 bit on a new Thinkpad W510 with nVidia Quadro FX 880M graphics card. I am running with the default graphics drivers that installed with ubuntu install. My problem is that when I am logging in the screen acts normally as far as birghtness is concerned. I can increase/decrease brightness with Fn keys. But few seconds after I log in screen goes pitch dark. Hitting Fn+Home flickers the screen to all the way bright, then all the way dark. This behavior continues until I reach maximum brightness, in which case the screen stays all the way bright, for a few more seconds and then again goes dark if there is no activity & the cycle continues. Have you guys faced any of these issues? If so any pointers on how to resolve it. I am not alone, on ubuntu forum I saw another person having the same issue - link but no solution. Please help! UPDATE I followed the instructions that htorque mentions in his answer and it worked.

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  • Import virtualBox appliance to KVM

    - by Hugo Bulnes
    Im new using KVM as a virtualization solution. Currently I'm using VirtualBox to manage my virtual machines in my personal computer, but I'm moving my virtualization to a Server, so I set up a Linux server with KVM. And now I'm trying to import a virtualBox vm to KVM. So far I couldn't make it work. I already convert the ova file from VirtualBox to a format more familiar to KVM (qcow2), and I try to create a new virtual machine using virt-install command and setting the new virtual machine hard drive with the .qcow2 file. There is anyone could help me? thank you!

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  • Enterprise Cloud Infrastructure for Dummies eBook

    - by ferhat
    Are you considering "going to the cloud" as a way to cut IT costs and maximize your virtualization investments? Then Enterprise Cloud Infrastructure for Dummies is a no-nonsense guide to help you navigate this hot topic. This user friendly guide explains how to cut through the noise and take advantage of integrated virtualization and management tools to implement a cloud infrastructure that not only lowers operational costs but that can easily adapt and scale to run a broad range of application services safely and securely. &amp;amp;<span id="XinhaEditingPostion"></span>amp;amp;amp;amp;amp;lt;span id=&amp;amp;amp;amp;amp;amp;amp;quot;XinhaEditingPostion&amp;amp;amp;amp;amp;amp;amp;quot;&amp;amp;amp;amp;amp;amp;amp;gt;&amp;amp;amp;amp;amp;amp;amp;lt;/span&amp;amp;amp;amp;amp;amp;amp;gt; This e-book will serve as a valuable Cloud computing guide covering important topics such as: The current overall cloud landscape and how to best leverage private cloud infrastructure How to build an effective Enterprise Cloud Infrastructure using the Oracle Optimized Solution methodology Quantifiable costs savings gained using Oracle's integrated hardware and software and Optimized Solutions Download your exclusive copy of Enterprise Cloud Infrastructure, Oracle Special Edition today.

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  • Optimal way to make MySQL backups for fairly large databases (MyISAM / InnoDB)

    - by WinkyWolly
    Currently we have one beefy MySQL database that runs a couple of high traffic Django based websites as well as some e-commerce websites of decent size. As a result we have a fair amount of large databases using both InnoDB and MyISAM tables. Unfortunately we've recently hit a wall due to the amount of traffic so I've setup another master server to help alleviate reads / backups. Now at the moment I simply use mysqldump with a few arguments and it's proven to be fine.. until now. Obviously mysqldump is a slow quick method however I believe we've outgrown its use. I now need a good alternative and have been looking into utilizing Maatkits mk-parallel-dump utility or an LVM snapshot solution. Succinct short version: I have a fairly large MySQL databases I need to backup Current method using mysqldump is inefficient and slow (causing issues) Looking into something such as mk-parallel-dump or LVM snapshots Any recommendations or ideas would be appreciated - since I have to re-do how we're doing things I rather have it done properly / most efficient :).

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  • Problems syncing photos and strange effects of uploaded files from other devices

    - by Daniel
    I have a Galaxy Spica (GT-i5700) Android v2.1, rooted with Leshak dev 7 #123. But never mind the root info, the problem would be the same unrooted. The photos from this phone is stored in "sdcard/images", nevertheless the phone also creates a "sdcard/DCIM" but only stores some thumbnails there. Problem nr 1: U1 only reads the DCIM-folder for automatic photo-upload. So photos stored in this phone is not uploaded. If I move photos to "DCIM" folder, U1 recognises the photos and start uploading them. Possible solution: Could there be an option in the settings, to set preferred photo folder? Problem nr 2: Out of 74 pictures, 12 did not get uploaded. Pressing "Retry failed transfers" in Settings does nothing. Pressing the files where status is "Upload failed, tap to retry" only changes the status to "Uploading..." but nothing gets uploaded. If I upload another file to U1, it is uploaded directly without any problem. It has nothing to do with file size, 1,1 MB files has been uploaded fine whilst some failed are 0,8 MB. Problem nr 3: The photos from DCIM are in my case uploaded to a folder called "Pictures - GT-I5700" in U1. If I log in to the homepage and from there upload another photo in "Pictures - GT-I5700", it shows up in U1 on my phone fine. But when I tap it, U1 downloads the photo to "sdcard/U1/Pictures - GT-I5700". If it sync photos from "sdcard/DCIM" to a specific folder, why not also download files to the same folder from which it is synced? After a while of usage, syncing and uploading files from different clients it would be a mishmash of folders and places files are stored and considering that I see no use of U1 at all. Another question: If my SD card in some way breaks down/some folders cannot be read/card temporarly changed and U1 is running, does U1 consider that as files deleted and also delete from the cloud?

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  • VMWare ESX installation on sata disk

    - by ilansch
    I have a PC with Gigabyte H77 motherboard with Intel I5-3550 CPU 8 GB RAM 1600MHz and a 500GB Harddisk (7200RPM) - WD Sata III disk I wish to install esx on it and run some virtual machines on it. not alot, something like 2-3 VMs. My hardisk is Sata, is it possible to install ESX Server on it ? I am not worried about loading issues. When i try loading the installation it writes it cannot detect my disk (since its not SCSI disk). How can i bypass this ? or find a solution. thanks

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  • How do you keep SOA DRY?

    - by TaylorOtwell
    In our organization, we've shifted to a more "service oriented architecture". To give an example, let's assume we need to retrieve a "Quote" object. This quote has a shipper, a consignee, phone numbers, contacts, email addresses, and other location information. In other words, a Quote object is made up of many other objects. So, it seems like it would make sense to make a "Quote Retrieval Service". In our situation, we've accomplished this by creating a .NET solution and writing the service. The service API looks something like this (in pseudo-code): Function GetQuote(String ID) Returns Quote So, so far so good. Now, when this service is consumed, to keep things "de-coupled", we are creating essentially a duplicate of the Quote object and mapping from the QuoteService version of the Quote into the consumer's version of the Quote. In many cases, these classes will have the exact same properties. So, if the Quote service is consumed by 5 other applications, we would have 6 definitions of what a "Quote" is. One for each consumer, and one for the service. This feels wrong. I thought code was supposed to be DRY, but it seems like our method of SOA is forcing us to create tons of duplicated class definitions. What are we doing wrong, or is the code duplication just a "necessary evil" of SOA?

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