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  • take performance as the only criterion for a smal site, which framework should I choose on a shared

    - by john
    Dear friends, I'm trying to set up a small full functional website for a small community on a shared hosting. Scientific computing is quite heavy. Scalability is not important. The only criterion is performance. Which framework would you suggest among the following:(or more) from your list) 1)Ruby on Rails 2) Grails 3) asp.net 4) zend I'm really new to this area, only starting reading some books and googling different blogs...so your expertise is really appreciated! thanks!

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  • patterns in case statement in bash scripting

    - by Ramiro Rela
    The man says that case statements use "filename expansion pattern matching". I usually want to have short names for some parameters, so I go: case $1 in req|reqs|requirements) TASK="Functional Requirements";; met|meet|meetings) TASK="Meetings with the client";; esac logTimeSpentIn "$TASK" I tried patterns like "req*" or "me{e,}t" which I understand would expand correctly to match those values in the context of filename expansion, but it doesn't work. Thanks.

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  • Changing window procedure for console window

    - by Anonymous
    I want to make console window with a functional tray icon. I figured out that most probably it is necessary to replace initial console's window procedure so I will be able to control all messages including notify area events. But SetWindowLong function returns 0, and GetLastError() tells that access is denied. hwndFound = GetConsoleWindow(); SetWindowLong(hwndFound, GWL_WNDPROC, (long)WndProc); What could it be, or maybe there is some other way to control tray icon manipulations?

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  • Should I use Java for a custom Swing component designed for a clojure app?

    - by nansen
    I want a simple timeline component (like in video editing software) for a clojure/seesaw app and I am wondering if it is a good approach to implement this directly with clojure and seesaw or if I should write it in java and make my clojure wrapper around it. Or more generally: is a functional programming language optimal for writing UI widgets? I cannot imagine doing that without a lot of state involved. And wasn't OO invented for UI-development in the first place?

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  • Database design -- does it respect 3rd NF?

    - by Flavius
    Hi I have the following relations (tables) in a relational model Person person_id, first_name, last_name, address Student person_id, matr_nr Teacher person_id, salary Lecture lecture_id, lect_name, lect_description Attendees lecture_id, person_id, date I'm wondering about the functional dependencies of Student and Teacher. Do these tables respect the 3rd normal form? Which should be the primary keys of these tables?

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  • looking for a proxy library

    - by gwegaweg
    i need to set up a proxy for cross-domain javascript. the problem is, i tried the simple fgets() , i discovered, javascripts are ignored and non-functional. is there a proxy library that handles all these ? it can be in any scripting language.

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  • What are you supposed to do with old SVN branches?

    - by John
    We had a SVN branch recently that had been merged back to trunk, and some more work on that feature/functional area was needed. I suggested using the same branch but was told you shouldn't re-use a branch once it has been integrated into trunk (a reference in SVN docs was given, I can't find it now). That suggests a branch is fairly useless once you merge back to trunk, so my question is once a branch is no longer needed, should it simply be deleted or kept?

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  • How to prevent components from rendering in Flex

    - by Tam
    Is there a way to prevent a component from rendering in Flex (to save memory or processing power)? I tried doing something like: <components:AddNewItemGroup id="addItemGroup" visible="false" enabled="false" horizontalCenter="0" bottom="0" /> I noticed that the component gets rendered but it's just not visible or functional.

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  • Difference in declaring IDisposable member in using block or at using block declaration?

    - by dotnetdev
    Hi, I have the code below: using (SqlCommand command = new SqlCommand()) { command.CommandType = System.Data.CommandType.StoredProcedure; command.Connection = new SqlConnection(); command.CommandText = ""; command.Parameters.Add(new SqlParameter("@ExperienceLevel", 3).Direction = System.Data.ParameterDirection.Input); SqlDataReader dataReader = command.ExecuteReader(); } Is there any functional impact in declaring the SqlConnection where I currently am declaring it as opposed to like so?: using (SqlCommand command = new SqlCommand()) using (SqlConnection connection = new SqlConnection()) Thanks

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  • Field name being converted in Unit Tests [rails]?

    - by yar
    I am noting this strange behavior where one of my fields -- receive_empresa_test_info -- has worked fine though it's always been referred to as receive_empresa_info. In Functional Tests, though, the real field name is receive_empresa_test_info. What is going on here? Might this be some part of the Rails environment that I'm missing during testing?

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  • How do call this symbolic code transformation ?

    - by erric
    Hi, I often cross this kind of code transformation (or even mathematical transformation) (python example, but applies to any language) I've go a function def f(x): return x I use it into another one. def g(x): return f(x)*f(x) print g(2) leads to 4 But I want to remove the functional dependency, and I change the function g into def g(f): return f*f print g( f(2) ) leads to 4 too How do you call this kind of transformation, locally turning a function into a scalar ?

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  • Scale down whole website [into iFrame]

    - by Samuel
    I was wondering if there is a (webbased) way to scale down a whole website and put it into an iframe. [including images etc], so that a user would get a fully functional preview of the website (only for websites without frame busting methods of course).

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  • How compliant is SIP VoIP software on the net?

    - by rusbi
    I developed a SIP stack for my company. It's far from perfect, a it's lacking a lot of things from the RFCs, but it's functional and work well with a lot of tested softphones and other SIP hardware and software. My question is: How much of SIP software can truly say that they are entirely SIP compliant? (Of the softphones you can find on the internet...)

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  • Passing template into boost function

    - by Ockonal
    template <class EventType> class IEvent; class IEventable; typedef boost::function<void (IEventable&, IEvent&)> behaviorRef; What is the right way for passing template class IEvent into boost function? With this code I get: error: functional cast expression list treated as compound expression error: template argument 1 is invalid error: invalid type in declaration before ‘;’ token

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  • There's @interface in my @implementation — why is that?

    - by Mark McDonald
    This is a pretty noobish question – I'm looking at some Cocoa sample code and there's @interface blocks in the .m files as well as the headers. For instance, in the AppDelegate class header, a UIWindow and UI navigation are defined as instance variables, but the @property declarations are actually made in the implementation file. Is there a functional reason for this, is it a stylistic choice, or… ?

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  • AdPrep logs show an LDAP error

    - by Omar
    What I am trying to do is transition our domain from Server 2003 Enterprise x32 to Server 2008 R2 Enterprise x64. Here is what I have done thus far. The 2003 server is a physical machine, the 2008 server is a virtual machine Built a virtual machine that has Server 2008 R2 Enterprise x64 and joined it to the domain as a domain member On the 2003 DC, Raised Domain Functional Level and Forest Functional Level to Windows Server 2003 On the 2003 DC, went into the registry and navigated to HKLM\SYSTEM\CurrentControlSet\Services\NTDS\Parameters and verified that the Schema Version is 30 On the 2003 DC, inserted the Windows Server 2008 Enterprise x32 Edition to copy over the adprep folder. This version is the only one that seemed to work On the 2003 DC, opened command prompt and went to adprep directory and ran adprep /forestprep , adprep /domainprep , and adprep /domainprep /gpprep On the 2008 server, Installed the Active Directory Domain Services role from Server Manager On the 2003 DC, went into the registry and navigated to HKLM\SYSTEM\CurrentControlSet\Services\NTDS\Parameters and verified that the Schema Version is now 44 When I go to run dcpromo on the 2008 server, I get a message that says: "To install a domain controller into this Active Directory forest, you must first prepare using adprep /forestprep" I went back to the 2003 DC server and went through the adprep logs and I came across this: Adprep was unable to modify the security descriptor on object CN=DomainControllerAuthentication,CN=Certificate Templates,CN=Public Key Services,CN=Services,CN=Configuration,DC=xeroxtoledo,DC=com. [Status/Consequence] ADPREP was unable to merge the existing security descriptor with the new access control entry (ACE). [User Action] Check the log file ADPrep.log in the C:\WINDOWS\debug\adprep\logs\20100327143517 directory for more information. Adprep encountered an LDAP error. *Error code: 0x20. Server extended error code: 0x208d, Server error message: 0000208D: NameErr: DSID-031001CD, problem 2001 (NO_OBJECT), data 0, best match of: 'CN=Certificate Templates,CN=Public Key Services,CN=Services,CN=Configuration,DC=xeroxtoledo,DC=com* In fact, I got three of these errors. The LDAP error is consistent with all three, but the top part where it says "Adprep was unable to modify the security descriptor on object" are different. They are the following: CN=DomainControllerAuthentication,CN=Certificate Templates,CN=Public Key Services,CN=Services,CN=Configuration,DC=xeroxtoledo,DC=com. CN=DirectoryEmailReplication,CN=Certificate Templates,CN=Public Key Services,CN=Services,CN=Configuration,DC=xeroxtoledo,DC=com. CN=KerberosAuthentication,CN=Certificate Templates,CN=Public Key Services,CN=Services,CN=Configuration,DC=xeroxtoledo,DC=com. The credentials I am using on the 2008 server when running dcpromo is my domain account. My account is part of the domain and enterprise admin groups. I've tried various quick fixes that I've came across through Google searches that include: Disabling AntiVirus on current DCs Pointing DNS on PDC to point to itself Changing the Schema Update Allowed key to 1 and tried rerunning adprep - when rerunning adprep, told me that Forest-wide information has already been updated Disabled Windows Firewall on the Server 2008 box On the 2003 DC, went to Domain Controller Security Policy Local Policies User Rights Assignment and added Domain Admins to the Enable computer and user accounts to be trusted for delegation policy setting Both our PDC and BDC are Global Catalog Servers. Not sure if this matters or not I ran the command netdom query fsmo and verified that the FSMO role holder is the current 2003 PDC I ran dcdiag /v on the 2003 PDC and the only thing that failed was Services. Dnscache Service is stopped on the PDC I even went as far as deleting the virtual machine and recreating it from scratch - no avail... Help :(

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  • The Incremental Architect&acute;s Napkin - #1 - It&acute;s about the money, stupid

    - by Ralf Westphal
    Originally posted on: http://geekswithblogs.net/theArchitectsNapkin/archive/2014/05/24/the-incremental-architectacutes-napkin---1---itacutes-about-the.aspx Software development is an economic endeavor. A customer is only willing to pay for value. What makes a software valuable is required to become a trait of the software. We as software developers thus need to understand and then find a way to implement requirements. Whether or in how far a customer really can know beforehand what´s going to be valuable for him/her in the end is a topic of constant debate. Some aspects of the requirements might be less foggy than others. Sometimes the customer does not know what he/she wants. Sometimes he/she´s certain to want something - but then is not happy when that´s delivered. Nevertheless requirements exist. And developers will only be paid if they deliver value. So we better focus on doing that. Although is might sound trivial I think it´s important to state the corollary: We need to be able to trace anything we do as developers back to some requirement. You decide to use Go as the implementation language? Well, what´s the customer´s requirement this decision is linked to? You decide to use WPF as the GUI technology? What´s the customer´s requirement? You decide in favor of a layered architecture? What´s the customer´s requirement? You decide to put code in three classes instead of just one? What´s the customer´s requirement behind that? You decide to use MongoDB over MySql? What´s the customer´s requirement behind that? etc. I´m not saying any of these decisions are wrong. I´m just saying whatever you decide be clear about the requirement that´s driving your decision. You have to be able to answer the question: Why do you think will X deliver more value to the customer than the alternatives? Customers are not interested in romantic ideals of hard working, good willing, quality focused craftsmen. They don´t care how and why you work - as long as what you deliver fulfills their needs. They want to trust you to recognize this as your top priority - and then deliver. That´s all. Fundamental aspects of requirements If you´re like me you´re probably not used to such scrutinization. You want to be trusted as a professional developer - and decide quite a few things following your gut feeling. Or by relying on “established practices”. That´s ok in general and most of the time - but still… I think we should be more conscious about our decisions. Which would make us more responsible, even more professional. But without further guidance it´s hard to reason about many of the myriad decisions we´ve to make over the course of a software project. What I found helpful in this situation is structuring requirements into fundamental aspects. Instead of one large heap of requirements then there are smaller blobs. With them it´s easier to check if a decisions falls in their scope. Sure, every project has it´s very own requirements. But all of them belong to just three different major categories, I think. Any requirement either pertains to functionality, non-functional aspects or sustainability. For short I call those aspects: Functionality, because such requirements describe which transformations a software should offer. For example: A calculator software should be able to add and multiply real numbers. An auction website should enable you to set up an auction anytime or to find auctions to bid for. Quality, because such requirements describe how functionality is supposed to work, e.g. fast or secure. For example: A calculator should be able to calculate the sinus of a value much faster than you could in your head. An auction website should accept bids from millions of users. Security of Investment, because functionality and quality need not just be delivered in any way. It´s important to the customer to get them quickly - and not only today but over the course of several years. This aspect introduces time into the “requrements equation”. Security of Investments (SoI) sure is a non-functional requirement. But I think it´s important to not subsume it under the Quality (Q) aspect. That´s because SoI has quite special properties. For one, SoI for software means something completely different from what it means for hardware. If you buy hardware (a car, a hair blower) you find that a worthwhile investment, if the hardware does not change it´s functionality or quality over time. A car still running smoothly with hardly any rust spots after 10 years of daily usage would be a very secure investment. So for hardware (or material products, if you like) “unchangeability” (in the face of usage) is desirable. With software you want the contrary. Software that cannot be changed is a waste. SoI for software means “changeability”. You want to be sure that the software you buy/order today can be changed, adapted, improved over an unforseeable number of years so as fit changes in its usage environment. But that´s not the only reason why the SoI aspect is special. On top of changeability[1] (or evolvability) comes immeasurability. Evolvability cannot readily be measured by counting something. Whether the changeability is as high as the customer wants it, cannot be determined by looking at metrics like Lines of Code or Cyclomatic Complexity or Afferent Coupling. They may give a hint… but they are far, far from precise. That´s because of the nature of changeability. It´s different from performance or scalability. Also it´s because a customer cannot tell upfront, “how much” evolvability he/she wants. Whether requirements regarding Functionality (F) and Q have been met, a customer can tell you very quickly and very precisely. A calculation is missing, the calculation takes too long, the calculation time degrades with increased load, the calculation is accessible to the wrong users etc. That´s all very or at least comparatively easy to determine. But changeability… That´s a whole different thing. Nevertheless over time the customer will develop a feedling if changeability is good enough or degrading. He/she just has to check the development of the frequency of “WTF”s from developers ;-) F and Q are “timeless” requirement categories. Customers want us to deliver on them now. Just focusing on the now, though, is rarely beneficial in the long run. So SoI adds a counterweight to the requirements picture. Customers want SoI - whether they know it or not, whether they state if explicitly or not. In closing A customer´s requirements are not monolithic. They are not all made the same. Rather they fall into different categories. We as developers need to recognize these categories when confronted with some requirement - and take them into account. Only then can we make true professional decisions, i.e. conscious and responsible ones. I call this fundamental trait of software “changeability” and not “flexibility” to distinguish to whom it´s a concern. “Flexibility” to me means, software as is can easily be adapted to a change in its environment, e.g. by tweaking some config data or adding a library which gets picked up by a plug-in engine. “Flexibiltiy” thus is a matter of some user. “Changeability”, on the other hand, to me means, software can easily be changed in its structure to adapt it to new requirements. That´s a matter of the software developer. ?

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