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• Web Frameworks caring about persistence?

  - by Mik378

  I have noticed that Play! Framework encompasses persistence strategy (like JPA etc...) Why would a web framework care about persistence ?! Indeed, this would be the job of the server-sides components (like EJB etc...), wouldn't this? Otherwise, client would be too coupled with server's business logic. UPDATE: One answer would be : it's more likely used for simple application including itself the whole business logics. However, for large applications with well-designed layers(services, domain, DAO's etc..), persistence is not recommended within web client layer since there would be several different web(or not) clients.

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• What was your most challenging project? and why? [closed]

  - by tau

  I am asked this question many times in the interviews. I get confused about which project to tell them and why some project would look challenging or non-challenging. What are they looking for in the answer? Any software is a challenge before it gets started and it becomes a normal software engineering task after it has finished. All softwares I made were challenging until they got finished. Do I misunderstood the word "challenge"? Whats wrong in my thinking? What was your most challenging project and why you think so?

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• Ubuntu One Bookmark sync not working.

  - by Rob

  Everything in Ubuntu One sync works great except bookmark sync. I tried the wiki answer that said to run: killall beam.smp beam rm ~/.config/desktop-couch/desktop-couchdb.ini dbus-send --session --dest=org.desktopcouch.CouchDB --print-reply --type=method_call / org.desktopcouch.CouchDB.getPort This is what my terminal came back with: robin@robin-MIDWAY:~$ killall beam.smp beam beam: no process found robin@robin-MIDWAY:~$ rm ~/.config/desktop-couch/desktop-couchdb.ini rm: cannot remove `/home/robin/.config/desktop-couch/desktop-couchdb.ini': No such file or directory robin@robin-MIDWAY:~$ dbus-send --session --dest=org.desktopcouch.CouchDB --print-reply --type=method_call / org.desktopcouch.CouchDB.getPort Error org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken. robin@robin-MIDWAY:~$ I'm a computer "newbie" so it's possible I'm doing something wrong, are there any tutorials out there on how to use the CouchDB? I have Bindwood installed.

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• How do I get an Epson al-c 1700 printer working?

  - by Edmond Frants

  I have a brand new epson aculaser c1700 and i'd like to have it working fine on ubuntu 12.04. so i did my homework, kind of, no printer driver comes for this printer in cups ... so i asked epson support who drove me to avasys who no longer handle support since december 2011. This the question that is still in my mind : as this printer comes with an osx driver which uses cups as printer server, how come no driver can be found for cups? I tried to get ppd and filters from osx driver and use them to install the printer on ubuntu but no answer from printer and none printed sheet i have .... i'm so disappointed i could cry ... I'd like to work with someone to get this working fine, please help me!

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• Oracle OpenWorld 2012 Tweet Meet!

  - by jgelhaus

  OTN Tweet MeetDo you Tweet? What’s your handle? Ever wanted to meet the faces behind all the tweets from Oracle, partners, and fellow customers? Grab a @__ nametag and join in! Tuesday, October 2, from 4:30 p.m. to 6:30 p.m. at the OTN lounge (you know, that big RED tent between Moscone North and South)!  Come and mingle with fellow tweeters. In addition to great company, Oracle Database experts will be on hand to answer questions.

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• What percentage of revenue would be fair for app stores to take? [closed]

  - by Tyler Collier

  Apple takes 30% of revenue from app sales on the iPhone app store. Now Apple does the same with the Mac app store. Google also takes a 30% cut in the Android Market. These seem pretty steep. What percentage do you think would be fair and good for both you as a developer/vendor and Apple/Google? What's a happier middle ground? 20%? If the answer you give is less than 30% but you are selling apps in the app store or android market, please explain why you are willing to, and what benefits Apple and Google would see from reducing their cuts.

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• Best way for a technical manager to stay up to date on technology

  - by JoelFan

  My manager asked for a list of technical blogs he should follow to stay current on technology. His problem is he keeps hearing terms that he hasn't heard of (i.e. NoSql, sharding, agure, sevice bus, etc.) and he would prefer to at least have a fighting chance of knowing something about them without having to be reactive and looking them up. Also I think he wants to have a big picture of all the emerging technologies and where they fit in together instead of just learning about each thing in isolation. He asked about blogs but I'm thinking print magazines may also help. What should I answer him?

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• Discovering Assets on Multiple Subnets

  - by Owen Allen

  I saw this question recently, about making discovery work: "I am attempting to discover a group of ILOMs which seem to be on a different subnet than their hosts. When I try to discover the ILOMs, Ops Center can't find them. Is it a requirement that the ILOM and its host should be on the same subnet?" The short answer is no, related assets don't have to be on the same subnet for you to discover them. The correlation between related assets doesn't depend on them being on the same subnet. What's likely going on, if you're running into similar issues, is that the subnet where you're trying to discover systems needs to be associated with a Proxy Controller that can reach it. You can go here to see how to associate a network with a Proxy Controller. Once the network is associated with a Proxy Controller, you should be able to discover and manage assets on it.

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• Should "closed as duplicate" software programming be extreme or functional? [migrated]

  - by Web Developer

  I'm a web developer loving this site for it's potential, and it's Coffee look . I was reading a great question, that is this: click here and noticed 8 moderators tagged it as DUPLICATED! The question was closed! Obviously it isn't and I'm going to explain why if needed but it can be seen: the question is unique, is the case/story of a young who have SPECIFIC experience with C++ , VB and Assembler and asking, knowing this specifications an answer (It is not a general question like "hey I'm young can I do the programmer??") Let me know your opinion! do you think this question should or should not be closed? And let's think about also the people not only the "data" and "cases covered" ... do you think this is important too? or is better to keep a place where people doesn't count?

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• What happened to GremCheck? Is there a viable replacement?

  - by goober

  I was a big fan of an app called "GremCheck" that was out a while back, that seems to have disappeared. It was a JavaScript included in a master page that placed an icon at the bottom of the page. It was used during testing. You could define your own tests, and the box could pop up per page and viewers would answer the questions you define (such as "Does this page have the correct title?", "Is the Grammar Correct", "Does the design look consistent"). This was useful for end-user tests groups and quick testing for developers if time was squeezed on full functional testing. Anyone know where GremCheck went, if I can get to it, and if there's anything out there that does something similar?

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• SQL SERVER – Free Online Training on .net and SQL

  - by pinaldave

  I around 10 Free Online Training Codes available of .NET and SQL Training from Pluralsight. I am willing to give it to someone who wants learn technology this weekend. You just have to go to my Facebook page and leave a comment explaining in one line – what course will you learn during weekend. I will send all this codes to 10 winners whom I will randomly select using Facebook. Meanwhile do you know how can you generate Zero without using any numbers in T-SQL. My friend Madhivanan has done that and I find it very interesting.Run following T-SQL code – ‘SELECT $’. He has written many other tricks how to generate zero also on his blog. On another note – I have published my answer for question about SELECT * vs SELECT COUNT(*) here. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: About Me, Best Practices, Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• T-SQL Tuesday - IO capacity planning

  - by Michael Zilberstein

  This post is my contribution to Adam Machanic's T-SQL Tuesday #004 , hosted this time by Mike Walsh . Being applicative DBA, I usually don't take part in discussions which storage to buy or how to configure it. My interaction with IO is usually via PerfMon. When somebody calls me asking why everything is suddenly so slow on database server, "disk queue length" or "average seconds per transfer" counters provide an overwhelming answer in 60-70% of such cases. Sometimes it can be...(read more)

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• Enable wifi on my computer - firmware missing

  - by Sarah

  I am attempting to set up a wireless network on 11.04, freshly download today. The router is on and working. However, I do not have a wifi "card" (which I am assuming is a little USB-type thing that allows internet access, but correct me if I am wrong) and every time I try to type in the MAC address and everything, nothing works. I also get the "firmware missing" error when I scroll over the signal strength, which I have tried looking up but have been unsuccessful with completely understanding it. I guess my main question is do I need another little device to be able to use wifi on my ubuntu? I do have an ethernet cable but another person is using it and I do not want to be tied down to that cable. the problem is that none of the wireless networks show up, however they show up when I go into Windows mode on my laptop. I get an error message at the top saying "firmware missing" which I have tried looking up but still have no straight answer for.

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• Platform Builder: Disable the USB Driver Dialog

  - by Bruce Eitman

  For a long time, Windows CE developers and users have wanted to disable the USB Driver Dialog that is displayed when an unknown USB device is plugged into the host controller.   Of course the question is always why would you want to do such a thing? The simple answer is that there are USB devices that are needed, like printers, which expose multiple functions to the bus, like scanners and faxes, which no Windows CE driver exists to support.   So the printer quietly loads a driver, but then the other functions cause a dialog to be shown. One solution is to create a USB Class driver that loads by default if no other driver has been loaded. This driver just accepts anything that it sees and then does nothing with it. Starting with the Windows Embedded CE 6.0 R3 March QFE/update, the USB 2.0 driver has a registry value to disable the dialog: [HKEY_LOCAL_MACHINE\Drivers\USB\LoadClients]       "DoNotPromptUser"=dword:0   Setting the DoNotPromptUser value to 1 disables the dialog. The default value is zero, so the driver continues to behave in the same way it always did unless you change this registry value.     Copyright © 2010 – Bruce Eitman All Rights Reserved

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• Where can I ask web design questions of a more amateur nature?

  - by Warren van Rooyen

  I don't want to bother pro web designers with simple questions as I see most of the questions here are quite technical. An example would be, 'I have a template I've downloaded. The folder contains a css folder and PHP files. How would I bring this into Dreamweaver?' It's unfortunately in a space between what I'd be able to find on Google and asking here without feeling like a hinderance for those who don't want to answer such simple questions. Thanks, Warren.

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• How to change Ubuntu Studio from XFCE to Gnome?

  - by Starx

  I have 12.04 Ubuntu Studio Installed at the moment. On removing a application called Terminal Emulator, I accidentally removed xfce too. As I am not very fond of xfce, I am OK with it as I can change the session to gnome 3 upon login. But session runs with occasional glitches. My question is how to remove xfce completely and turn it into pure gnome system. I am aware of the way to do apt-get install ubuntu-desktop But, this is going to change the ubuntu studio, I dont want that. I just want to change my ubuntu studio to pure gnome without uninstalling ubuntu-desktop. i.e. Something like ubuntustudio-12.04-gnome build. I've looked at this Q&A: How to remove xubuntu? The accepted answer removes some vital software from Ubuntu Studio such as Gimp, including ubuntustudio-desktop at the end.

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• Most underestimated programming tool

  - by Anto

  We have many great tools which helps a lot when programming, such as good programmers text editors, IDEs, debuggers, version control systems etc. Some of the tools are more or less "must have" tools for getting the job done (e.g. compilers). There are still always tools which do help a lot, but still don't get so much attention, for various reasons, for instance, when they were released, they were ahead of their time and now are more or less forgotten. What type of programming tool do you think is the most underestimated one? Motivate your answer.

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• Absolutely Nothing Apearing in "Additional Drivers"

  - by Joshua Arroyo

  OK so I just got Ubuntu the other month or so. I'm running the 11.04 version currently and trying to install drivers for a Nvidia graphics card (it's my brother's computer and he currently cannot find the number of the card right now). I read that, to install the proper drivers for gaming, I would need to go into "Additional Drivers" and choose them myself. I clicked to go into "Additional Drivers" and it searched "for available drivers", then opened the additional drivers list. Lo and Behold, there was nothing, simply the message "No proprietary drivers are in use on this system" and the Help and Close buttons. Sorry if there's some silly simple answer to all of this, I'm new to this sort of thing (used to Windows simplicity, lol) and I really don't know what to do. Help would be much appreciated. Also, I should mention that the graphics card was installed and ran fine before switching from Windows XP to Ubuntu.

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• How do I route my SMTP outgoing mail through gmail (Google Mail) ?

  - by Paula DiTallo

  Here is the quick answer:  Go into your client e software (e.g. Outlook, Thunderbird, etc.) for the account you are working on (usually default). Set the SMTP server to smtp.gmail.com Set the username as your gmail account user name (e.g. [email protected]). Gmail will need the username and password you use for that account, so if your default is set to some other email, be sure to set the username and password to that value, or click on the checkbox for username/password. Check TLS as the secure connection.   If you are looking for more in-depth info, check out Gina Trapani 's block on the topic.

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• Is there any practical use for the empty type in Common Lisp?

  - by Pedro Rodrigues

  The Common Lisp spec states that nil is the name of the empty type, but I've never found any situation in Common Lisp where I felt like the empty type was useful/necessary. Is it there just for completeness sake (and removing it wouldn't cause any harm to anyone)? Or is there really some practical use for the empty type in Common Lisp? If yes, then I would prefer an answer with code example. For example, in Haskell the empty type can be used when binding foreign data structures, to make sure that no one tries to create values of that type without using the data structure's foreign interface (although in this case, the type is not really empty).

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• What is the justification for Python's power operator associating to the right?

  - by Pieter Müller

  I am writing code to parse mathematical expression strings, and noticed that the order in which chained power operators are evaluated in Python differs from the order in Excel. From http://docs.python.org/reference/expressions.html: "Thus, in an unparenthesized sequence of power and unary operators, the operators are evaluated from right to left (this does not constrain the evaluation order for the operands): -1*2 results in -1."* This means that, in Python: 2**2**3 is evaluated as 2**(2**3) = 2**8 = 256 In Excel, it works the other way around: 2^2^3 is evaluated as (2^2)^3 = 4^3 = 64 I now have to choose an implementation for my own parser. The Excel order is easier to implement, as it mirrors the evaluation order of multiplication. I asked some people around the office what their gut feel was for the evaluation of 2^2^3 and got mixed responses. Does anybody know of any good reasons or conciderations in favour of the Python implementation? And if you don't have an answer, please comment with the result you get from gut feel - 64 or 256?

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• SQL SERVER – Weekly Series – Memory Lane – #053 – Final Post in Series

  - by Pinal Dave

  It has been a fantastic journey to write memory lane series for an entire year. This series gave me the opportunity to go back and see what I have contributed to this blog throughout the last 7 years. This was indeed fantastic series as this provided me the opportunity to witness how technology has grown throughout the year and how I have progressed in my career while writing this blog post. This series was indeed fantastic experience readers as many joined during the last few years and were not sure what they have missed in recent years. Let us continue with the final episode of the Memory Lane Series. Here is the list of selected articles of SQLAuthority.com across all these years. Instead of just listing all the articles I have selected a few of my most favorite articles and have listed them here with additional notes below it. Let me know which one of the following is your favorite article from memory lane. 2007 Get Current User – Get Logged In User Here is the straight script which list logged in SQL Server users. Disable All Triggers on a Database – Disable All Triggers on All Servers Question : How to disable all the triggers for a database? Additionally, how to disable all the triggers for all servers? For answer execute the script in the blog post. Importance of Master Database for SQL Server Startup I have received following questions many times. I will list all the questions here and answer them together. What is the purpose of Master database? Should our backup Master database? Which database is must have database for SQL Server for startup? Which are the default system database created when SQL Server 2005 is installed for the first time? What happens if Master database is corrupted? Answers to all of the questions are very much related. 2008 DECLARE Multiple Variables in One Statement SQL Server is a great product and it has many features which are very unique to SQL Server. Regarding feature of SQL Server where multiple variable can be declared in one statement, it is absolutely possible to do. 2009 How to Enable Index – How to Disable Index – Incorrect syntax near ‘ENABLE’ Many times I have seen that the index is disabled when there is a large update operation on the table. Bulk insert of very large file updates in any table using SSIS is usually preceded by disabling the index and followed by enabling the index. I have seen many developers running the following query to disable the index. 2010 List of all the Views from Database Many emails I received suggesting that they have hundreds of the view and now have no clue what is going on and how many of them have indexes and how many does not have an index. Some even asked me if there is any way they can get a list of the views with the property of Index along with it. Here is the quick script which does exactly the same. You can also include many other columns from the same view. Minimum Maximum Memory – Server Memory Options I was recently reading about SQL Server Memory Options over here. While reading this one line really caught my attention is minimum value allowed for maximum memory options. The default setting for min server memory is 0, and the default setting for max server memory is 2147483647. The minimum amount of memory you can specify for max server memory is 16 megabytes (MB). 2011 Fundamentals of Columnstore Index There are two kinds of storage in a database. Row Store and Column Store. Row store does exactly as the name suggests – stores rows of data on a page – and column store stores all the data in a column on the same page. These columns are much easier to search – instead of a query searching all the data in an entire row whether the data are relevant or not, column store queries need only to search a much lesser number of the columns. How to Ignore Columnstore Index Usage in Query In summary the question in simple words “How can we ignore using the column store index in selective queries?” Very interesting question – you can use I can understand there may be the cases when the column store index is not ideal and needs to be ignored the same. You can use the query hint IGNORE_NONCLUSTERED_COLUMNSTORE_INDEX to ignore the column store index. The SQL Server Engine will use any other index which is best after ignoring the column store index. 2012 Storing Variable Values in Temporary Array or Temporary List SQL Server does not support arrays or a dynamic length storage mechanism like list. Absolutely there are some clever workarounds and few extra-ordinary solutions but everybody can;t come up with such solution. Additionally, sometime the requirements are very simple that doing extraordinary coding is not required. Here is the simple case. Move Database Files MDF and LDF to Another Location It is not common to keep the Database on the same location where OS is installed. Usually Database files are in SAN, Separate Disk Array or on SSDs. This is done usually for performance reason and manageability perspective. Now the challenges comes up when database which was installed at not preferred default location and needs to move to a different location. Here is the quick tutorial how you can do it. UNION ALL and ORDER BY – How to Order Table Separately While Using UNION ALL If your requirement is such that you want your top and bottom query of the UNION resultset independently sorted but in the same result set you can add an additional static column and order by that column. Let us re-create the same scenario. Copy Data from One Table to Another Table – SQL in Sixty Seconds #031 – Video http://www.youtube.com/watch?v=FVWIA-ACMNo Reference: Pinal Dave (http://blog.sqlauthority.com)Filed under: Memory Lane, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• Beginner's guide to writing comments?

  - by Cameron

  Is there a definitive guide to writing code comments, aimed at budding developers? Ideally, it would cover when comments should (and should not) be used, and what comments should contain. This answer: Do not comment WHAT you are doing, but WHY you are doing it. The WHAT is taken care of by clean, readable and simple code with proper choice of variable names to support it. Comments show a higher level structure to the code that can't be (or is hard to) show by the code itself. comes close, but it's a little concise for inexperienced programmers (an expansion on that with several examples and corner cases would be excellent, I think).

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• Implementing separation of concerns via MVC

  - by user2368481

  I'm creating a question to see if my understanding of MVC separation is correct, I haven't been able to find a clear answer anywhere online. So is this the right way to implement it (in Java): I would have 3 .java files, one each for Model, Controller, View. I would put all the classes related to Model in the Model.java like so: //Model.java { public class Model //class fields public Model(); public ModelClassA(); public ModelClassB(); public ModelClassC(); } With the ModelClasses being any class that I consider belonging to the Model. Is it correct to have the classes within the Model Class, as I have read that nested classes should be avoided where possible.

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• Setup & Usage of Document Sequencing in Oracle Receivables

  - by Robert Story

  Upcoming WebcastTitle: Setup & Usage of Document Sequencing in Oracle ReceivablesDate: May 20, 2010 Time: 11:00 am EDT Product Family: Receivables Community Summary Understanding Document Sequencing and how it can be used to generate document numbers in Oracle Receivables. This one-hour session is recommended for both technical and functional users. Topics will include: Review of important tablesRequired setup stepsUse of Oracle Diagnostics to review critical setupsHow to create gapless sequencesCommon Errors Troubleshooting Tips A short, live demonstration (only if applicable) and question and answer period will be included. Click here to register for this session....... ....... ....... ....... ....... ....... .......The above webcast is a service of the E-Business Suite Communities in My Oracle Support.For more information on other webcasts, please reference the Oracle Advisor Webcast Schedule.Click here to visit the E-Business Communities in My Oracle Support Note that all links require access to My Oracle Support.

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