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• Kloxo - Use third party nameserver

  - by LePhleg

  Here's my case: I got my domain from a registrar. I got my VPS up from a provider who also offers free DNS hosting, on their own server (separately from my VPS, IP:111.111.111.111). So I got these third-party nameservers, lets name them: ns1.provider.com ns2.provider.com and pointed my domain registrar to them. I let it propagate for 24 hours so I believe its ok. (if I ping my domain I get the IP for these nameservers - 111.111.111.111) Afterwards I headed to my providers cPanel (the one they gave me for the DNS hosting service) and changed the default A Record IP from 111.111.111.111 to the IP associated with my VPS (IP:222.222.222.222). The last step, as I see it, is to configure my VPS via Kloxo panel and add the domain. Can someone guide me how can I achieve that? Is it just enough to create a new DNS Template and add as Primary DNS "ns1.provider.com" and Secondary DNS "ns2.provider.com"? Every tutorial I found is using Kloxo to create local nameservers on the same VPS which is something I want to avoid to save resources..

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• I want to add a Quality Assurance domain. How do I handle DNS servers?

  - by Tim

  I'm advising a large client on how to isolate their dev and testing from their production. They already have one domain, lets say xyz.net with the active directory domain as "XYZ01". I want to add second domain say QAxyz.net and make its active directory domain "QA01" All development and QA servers would be moved to the QAxyz.net domain, the machines would be part of the QA01 domain. Note: Some of these servers will have the same name as the production servers for testing purposes. I believe we would have separate DNS servers for each domain. If I am logged into the QA01 domain, to access the production domain I would qualify my access like so: \PRODSERVER.xyz.net login: XYZ01\username Do I need to add a forwarder to my QAxyz.net DNS server so that it can see xyz.net? Would I need to do the same to the xyz.net DNS server to see QAxyz.net? I don't know how to advise them in this. Does anyone have any other recommendations to isolationg a QA domain? Many Thanks in advance! Tim

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• EC2: is an instance's public DNS stable? Can I rely on it not changing?

  - by Aseem Kishore

  I'm new to Amazon EC2. I've launched my first instance, and am using it as a web server. I see that it has a public DNS (a public URL), e.g.: ec2-123-45-6-789.compute-1.amazonaws.com I can successfully go to this server in my browser, hit it via cURL, etc. I want to use this web server for a back-end service in an app I'm building, so I placed this URL in my app's config, and it works great. But when I manually stop and re-started my instance, I see that the public DNS changes! I've read that this happens when you explicitly stop and re-start, but doesn't happen if you just "reboot". I don't plan on explicitly stopping and re-starting this server ever, but my question is: will this public DNS ever change on its own for any reason? E.g. if the machine abnormally crashes, or whatever. In other words, is it safe to ship an app that's wired to this URL? Thanks!

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• Dynamic programming practice problems with solutions

  - by Algorist

  Hi, I have seen many questions on stackoverflow where dynamic programming technique can be used to make a exponential algorithm, a polynomial one. I have seen standard problems on dynamic programming. Is there a website or book that contains practice problems and solutions? Thanks Bala

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• Dynamic type languages versus static type languages

  - by cvs

  What are the advantages and limitations of dynamic type languages compared to static type languages? See also: whats with the love of dynamic languages (a far more argumentative thread...)

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• C# 4: Real-World Example of Dynamic Types

  - by routeNpingme

  I think I have my brain halfway wrapped around the Dynamic Types concept in C# 4, but can't for the life of me figure out a scenario where I'd actually want to use it. I'm sure there are many, but I'm just having trouble making the connection as to how I could engineer a solution that is better solved with dynamics as opposed to interfaces, dependency injection, etc. So, what's a real-world application scenario where dynamic type usage is appropriate?

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• Why are IOC containers unnecessary with dynamic languages

  - by mikemay

  Someone on the Herding Code podcast No. 68, http://herdingcode.com/?p=231, stated that IOC containers had no place with Python or Javascript, or words to that effect. I'm assuming this is conventional wisdom and that it applies to all dynamic languages. Why? What is it about dynamic languages that makes IOC containers unnecessary?

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• Dynamic JPA 2.0 query using Criteria API

  - by rrrrrrrrrrrrr

  Hello all, I am a bit stucked constructing a dynamic query using the CriteriaBuilder of JPA 2.0. I have quite a common use case I guess: User supplies a arbitrary amount of search parameters X to be and / or concatenated: like : select e from Foo where (name = X1 or name = X2 .. or name = Xn ) The Method or of CriteriaBuilder is not dynamic: Predicate or(Predicate... restrictions) Ideas? Samples?

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• C# - Disable Dynamic Keyword

  - by chief7

  Is there any way to disable the use of the "dynamic" keyword in .net 4? I thought the Code Analysis feature of VS2010 might have a rule to fail the build if the dynamic keyword is used but I couldn't fine one.

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• LINQ dynamic query

  - by ile

  How to dynamically generate LINQ query: int[] IDArray = {55, 36}; public IQueryable<ContactListView> FindAllContacts(int loggedUserID, int[] IDArray) { var result = ( from contact in db.Contacts //Start of dynamic part... where contact.UserID == loggedUserID foreach (var id in IDArray) { where contact.UserID == id } // End of dynamic part orderby contact.ContactID descending select new ContactListView { ContactID = contact.ContactID, FirstName = contact.FirstName, LastName = contact.LastName }); return result; } Thanks, Ile

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• Stereo Matching - Dynamic Programming

  - by Varun

  Hi, I am supposed to implement Dynamic programming algorithm for Stereo matching problem. I have read 2 research papers but still haven't understood as to how do I write my own c++ program for that ! Is there any book or resource that's available somewhere that I can use to get an idea as to how to start coding actually ? Internet search only gives me journal and conference papers regarding Dynamic Programming but not how to implement the algorithm step by step. Thanks Varun

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• Interface in a dynamic language?

  - by Bryan

  Interface (or an abstract class with all the methods abstract) is a powerful weapon in a static language. It allows different derived types to be used in a uniformed way. However, in a dynamic language, all objects can be used in a uniformed way as long as they define certain methods. Does interface exist in dynamic languages? It seems unnecessary to me.

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• how to pass variables this in dynamic query in sql

  - by Ranjana

  i using the dynamic query to pass the variables select a.TableName, COUNT(a.columnvalue) as '+'count'+' from Settings a where a.ColumnValue in ('+ @columnvalue +') and a.Value in (' + @value +') the @columnvalues = 'a','b','c' @value ='comm(,)','con(:)' how to pass this in dynamic query any idea???

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• How can I move my Dynamic Data folder?

  - by ProfK

  I accidentally moved my Dynamic Data' folder into myImagesfolder. The project still compiles, but it's just not right. However, when I try to move it back to the root in Visual Studio, I get an error that the destination folder already exists. If I moveDynamic Data` back to the root outside of Visual Studio, the project no longer compiles because the compiler can't find any dynamic data files. My infancy with git prompted me to ask here before embarking on an unpleasant 2am quest.

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• how to pass variables this in dynamic query

  - by Ranjana

  i using the dynamic query to pass the variables select a.TableName, COUNT(a.columnvalue) as '+'count'+' from Settings.ColumnMapping a where a.ColumnValue in ('+ @columnvalue +') and a.Value in (' + @value +') the @columnvalues = 'a','b','c' @value ='comm(,)','con(:)' how to pass this in dynamic query any idea???

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• Windows 2003 Dynamic Disk error

  - by ChrisH

  Hi, I was trying to ghost a partition on a Windows 2003 server, using Ghost 2003. Unfortunately things went horribly wrong, and now I can't boot back into my system. As you can see, Ghost creates a wee little partition to do its dirty work, and has dislodged my other partitions. Partition 2 in the image below is my C drive. Any suggestions as to how I might get this active again so that it boots? Cheers, Chris

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• Freeradius on Linux with dynamic VLAN assignment via AD

  - by choki

  I've been trying to configure my freeradius server on Linux to authenticate users from an existing Active Directory (windows server 2003) and i've already done that. Now i need to assign VLANs to those users and i dont know how to :(. The logical procedure should be with an AD attribute but i haven't found which one nor how to read it from the AD to use it on the freeradius server... Can anyone help me with this or tell me where can i find a solution? Thanks in advance

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• Dynamic rewrite rule - based on a hitcounter OR timestamp

  - by Derek Adair

  Hi, Sorry for the lack of coherence with sys-admin stuff... I'm a programmer ;) I have the need to switch front-end's of a website based on either a hit-counter or some kind of timer (related question). Is this possible with mod_rewrite? any other interesting techniques? Thanks

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• Recover data from Dynamic Disk (MBR) bigger than 2TB

  - by Helder

  Here is the situation: Promise Array FastTrak TX4310 with 3 disks (750 GB each) in RAID5. This comes to around 1500 GB of data. Last week I had the idea of expanding the RAID with an additional 750 GB disk. This would bring the volume to around 2250 GB. I plugged the disk and used the Webpam software to do the RAID expansion. However, I didn't count with the MBR 2TB limit, as I didn't remembered that the disk was using MBR instead of GPT and I didn't check it prior to the expansion. After a couple of days of expansion, today when I got home, the disk in Windows disk manager showed the message "Invalid disk" and when I try to activate it, it says "The operation is not allowed on the Invalid pack". From what I figured, the logical volume on the RAID expanded, and passed that info to the Windows layer and I ended up with an "larger than 2TB" MBR disk. I'm hopping that somehow I can still recover some data from this, and I was wondering if I can "rewrite" the MBR structure back to the 1500 GB partition size, so I can access the partition in Windows. Right now I'm doing an "Analyse" with TestDisk, as I hope the program will pickup the old 1500 structure and allow me to somehow revert back to it. I think that even though the Logical Drive in the RAID is bigger than the 2TB, I can somehow correct the MBR to show the 1500 GB partition again. I had a similar problem once, and I was able to recover the data using a similar method. What do you guys think? Is it a dead end? Am I totally screwed because there is the extra RAID layer that I'm not counting? Or is there other way to move with this? Thanks all!

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• How to flush DNS cache in Windows Mobile programmatically?

  - by Bounded

  Hello, My windows mobile application (written in C# with the compact framework) needs to know if a particular machine is active or not. To achieve this goal, I thought to use a ping mechanism. I tried to use the Ping class implemented in the opennetcf framework (the System.Net.NetworkInformation.Ping class for the .NET Framework is not part of the compact framework). Because I give to the Ping.Send function a host name, it first tries to resolve this host name and to retrieve an IP address. But i observe the following problem : If the first dns resolution fails (because the network is down at this moment), and if the application tries immediately again to send the ping, it fails too, even if the network is note down anymore. I check with a famous network protocol analyzer and i saw that only the requests concerning the first dns resolution are sent. The requests concerning the dns resolution of the second ping are not sent. Why is the second dns request not sent ? Is there any dns cache mechanism on such Windows Mobile devices ? If yes, can this mechanism beeing flushed programmatically ? EDIT : I gave up finding a solution to this DNS flush. I chose to ping an IP adress instead of a name machine. The problem of pinging an hard coded adress IP is that we have to be 100% sure that this IP will not change. The gateway IP can be used because it's always reachable (if it does not, it means the network is down).

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• What is the supposed productivity gain of dynamic typing?

  - by hstoerr

  I often heard the claim that dynamically typed languages are more productive than statically typed languages. What are the reasons for this claim? Isn't it just tooling with modern concepts like convention over configuration, the use of functional programming, advanced programming models and use of consistent abstractions? Admittedly there is less clutter because the (for instance in Java) often redundant type declarations are not needed, but you can also omit most type declarations in statically typed languages that usw type inference, without loosing the other advantages of static typing. And all of this is available for modern statically typed languages like Scala as well. So: what is there to say for productivity with dynamic typing that really is an advantage of the type model itself?

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• How do you navigate and refactor code written in a dynamic language?

  - by Philippe Beaudoin

  I love that writing Python, Ruby or Javascript requires so little boilerplate. I love simple functional constructs. I love the clean and simple syntax. However, there are three things I'm really bad at when developing a large software in a dynamic language: Navigating the code Identifying the interfaces of the objects I'm using Refactoring efficiently I have been trying simple editors (i.e. Vim) as well as IDE (Eclipse + PyDev) but in both cases I feel like I have to commit a lot more to memory and/or to constantly "grep" and read through the code to identify the interfaces. As for refactoring, for example changing method names, it becomes hugely dependent on the quality of my unit tests. And if I try to isolate my unit tests by "cutting them off" the rest of the application, then there is no guarantee that my stub's interface stays up to date with the object I'm stubbing. I'm sure there are workarounds for these problems. How do you work efficiently in Python, Ruby or Javascript?

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• Does having over 80% dynamic and rapidly changing content affect SEO?

  - by webmasters

  I have a website that pulls promotions of products from other website. My index page has a structure similar to this: My Brand - Best Promotions Looking for great deals? Check out our top promotions A menu - listing the promotions categories 20 of the latest promotions (the best ones): I list an image; Promotion description (200 chars); Link to the promotion page. Question: More then 80% of my index page (maybe even 90%) is composed of the 20 promotions I list; these promotions change on a daily bases - which dramatically changes the content of my index page. Does the dynamic changing of the index page affect SEO? Should I try to add more static text where I can? (which won't change) Ty

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• How do I get the value of a DynamicControl?

  - by Telos

  I'm using ASP.NET Dynamic Data functionality to do something a little weird. Namely, create a dynamic list of fields as children of the main object. So basically I have Ticket.Fields. The main page lists all the fields for Ticket, and the Fields property has a DynamicControl that generates a list of controls to collect more data. The tricky part is that this list ALSO uses Dynamic Data to generate the controls, so each field can be any of the defined FieldTemplates... meaning I don't necessarily know what the actual data control will be when I try to get the value. So, how do I get the value of a DynamicControl? Do I need to create a new subclass of FieldTemplate that provides a means to get at the value?

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• Why calling ISet<dynamic>.Contains() compiles, but throws an exception at runtime?

  - by Andrey Breslav

  Please, help me to explain the following behavior: dynamic d = 1; ISet<dynamic> s = new HashSet<dynamic>(); s.Contains(d); The code compiles with no errors/warnings, but at the last line I get the following exception: Unhandled Exception: Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: 'System.Collections.Generic.ISet<object>' does not contain a definition for 'Contains' at CallSite.Target(Closure , CallSite , ISet`1 , Object ) at System.Dynamic.UpdateDelegates.UpdateAndExecuteVoid2[T0,T1](CallSite site, T0 arg0, T1 arg1) at FormulaToSimulation.Program.Main(String[] args) in As far as I can tell, this is related to dynamic overload resolution, but the strange things are (1) If the type of s is HashSet<dynamic>, no exception occurs. (2) If I use a non-generic interface with a method accepting a dynamic argument, no exception occurs. Thus, it looks like this problem is related particularly with generic interfaces, but I could not find out what exactly causes the problem. Is it a bug in the compiler/typesystem, or legitimate behavior?

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