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  • Linux IPv6: DHCP and /127 prefixes

    - by Jeff Ferland
    I've tried multiple pieces of DHCP client and software in attempting to setup a solution for allocating a /127 prefix to virtual machines so that each maintains its own layer 2 isolation. Because there would only be one host assigned to each network, a /64 is impractical. While the prefix size could reasonably be somewhere in the /64-127 range, the crux of the problem has been the same regardless of the software used in configuring: the DHCP call to bring up the interface uses the address advertised by DHCPv6 and inserts two routes: the /127 given by the router advertising packets and a /64 as well. Any thoughts on why I'm getting the additional route added across dhcp client vendors?

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  • Functional programming compared to OOP with classes

    - by luckysmack
    I have been interested in some of the concepts of functional programming lately. I have used OOP for some time now. I can see how I would build a fairly complex app in OOP. Each object would know how to do things that object does. Or anything it's parents class does as well. So I can simply tell Person().speak() to make the person talk. But how do I do similar things in functional programming? I see how functions are first class items. But that function only does one specific thing. Would I simply have a say() method floating around and call it with an equivalent of Person() argument so I know what kind of thing is saying something? So I can see the simple things, just how would I do the comparable of OOP and objects in functional programming, so I can modularize and organize my code base? For reference, my primary experience with OOP is Python, PHP, and some C#. The languages that I am looking at that have functional features are Scala and Haskell. Though I am leaning towards Scala. Basic Example (Python): Animal(object): def say(self, what): print(what) Dog(Animal): def say(self, what): super().say('dog barks: {0}'.format(what)) Cat(Animal): def say(self, what): super().say('cat meows: {0}'.format(what)) dog = Dog() cat = Cat() dog.say('ruff') cat.say('purr')

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  • #OOW 2012 : IaaS, Private Cloud, Multitenant Database, and X3H2M2

    - by Eric Bezille
    The title of this post is a summary of the 4 announcements made by Larry Ellison today, during the opening session of Oracle Open World 2012... To know what's behind X3H2M2, you will have to wait a little, as I will go in order, beginning with the IaaS - Infrastructure as a Service - announcement. Oracle IaaS goes Public... and Private... Starting in 2004 with Fusion development, Oracle Cloud was launch last year to provide not only SaaS Application, based on standard development, but also the underlying PaaS, required to build the specifics, and required interconnections between applications, in and outside of the Cloud. Still, to cover the end-to-end Cloud  Services spectrum, we had to provide an Infrastructure as a Service, leveraging our Servers, Storage, OS, and Virtualization Technologies, all "Engineered Together". This Cloud Infrastructure, was already available for our customers to build rapidly their own Private Cloud either on SPARC/Solaris or x86/Linux... The second announcement made today bring that proposition a big step further : for cautious customers (like Banks, or sensible industries) who would like to benefits from the Cloud value of "as a Service", but don't want their Data out in the Cloud... We propose to them to operate the same systems, Exadata, Exalogic & SuperCluster, that are providing our Public Cloud Infrastructure, behind their firewall, in a Private Cloud model. Oracle 12c Multitenant Database This is also a major announcement made today, on what's coming with Oracle Database 12c : the ability to consolidate multiple databases with no extra additional  cost especially in terms of memory needed on the server node, which is often THE consolidation limiting factor. The principle could be compare to Solaris Zones, where, you will have a Database Container, who is "owning" the memory and Database background processes, and "Pluggable" Database in this Database Container. This particular feature is a strong compelling event to evaluate rapidly Oracle Database 12c once it will be available, as this is major step forward into true Database consolidation with Multitenancy on a shared (optimized) infrastructure. X3H2M2, enabling the new Exadata X3 in-Memory Database Here we are :  X3H2M2 stands for X3 (the new version of Exadata announced also today) Heuristic Hierarchical Mass Memory, providing the capability to keep most if not all the Data in the memory cache hierarchy. Of course, this is the major software enhancement of the new X3 Exadata machine, but as this is a software, our current customers would be able to benefit from it on their existing systems by upgrading to the new release. But that' not the only thing that we did with X3, at the same time we have upgraded everything : the CPUs, adding more cores per server node (16 vs. 12, with the arrival of Intel E5 / Sandy Bridge), the memory with 512GB memory as well per node,  and the new Flash Fire card, bringing now up to 22 TB of Flash cache. All of this 4TB of RAM + 22TB of Flash being use cleverly not only for read but also for write by the X3H2M2 algorithm... making a very big difference compare to traditional storage flash extension. But what does those extra performances brings to you on an already very efficient system: double your performances compare to the fastest storage array on the market today (including flash) and divide you storage price x10 at the same time... Something to consider closely this days... Especially that we also announced the availability of a new Exadata X3-2 8th rack : a good starting point. As you have seen a major opening for this year again with true innovation. But that was not the only thing that we saw today, as before Larry's talk, Fujitsu did introduce more in deep the up coming new SPARC processor, that they are co-developing with us. And as such Andrew Mendelsohn - Senior Vice President Database Server Technologies came on stage to explain that the next step after I/O optimization for Database with Exadata, was to accelerate the Database at execution level by bringing functions in the SPARC processor silicium. All in all, to process more and more Data... The big theme of the day... and of the Oracle User Groups Conferences that were also happening today and where I had the opportunity to attend some interesting sessions on practical use cases of Big Data one in Finances and Fraud profiling and the other one on practical deployment of Oracle Exalytics for Data Analytics. In conclusion, one picture to try to size Oracle Open World ... and you can understand why, with such a rich content... and this only the first day !

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  • Is there a LOGO interpreter that actually has a turtle?

    - by Tim Post
    This is not a repeat of the now infamous "How do I move the turtle in LOGO?" Recently, I had the following conversation with my five year old daughter: Daughter: Daddy, do you write programs? Me: Yes! Daughter: Daddy, what's a program? Me: A program is a set of instructions that a computer follows. Daughter: Daddy, can I write a program too? Me: Sure! This got me scrambling to think of a very basic language that a five year old could get some satisfaction from mastering rather quickly. I'm ashamed to admit that the first thing that came to mind was this: 10 INPUT "Tell me a secret" A$ 20 PRINT "Wow really? :" A$ 30 GOTO 10 That isn't going to hold a five year old's attention for very long and it requires too much of a lecture. However, moving a turtle around and drawing neat pictures might just work. Sadly, my search for a LOGO interpreter yielded noting but ad ridden sites, flight simulators and a whole bunch of other stuff that I really don't want. I'm hoping to find a cross platform (Java / Python) LOGO interpreter (dare I call it simulator?) with the following features: Can save / replay commands (stored programs) Has an actual turtle Sound effects are a plus Have you stumbled across something like this, if so, can you provide a link? I hate to ask a 'shopping' sort of question, but it seemed much better than "Is LOGO appropriate for a five year old?"

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  • SharePoint 2010 in the cloud a.k.a. SharePoint Online

    - by Sahil Malik
    Ad:: SharePoint 2007 Training in .NET 3.5 technologies (more information). There are 3 ways to run SharePoint On premises, you buy the servers, and you run the servers. Hosted servers, where you don’t run the servers, but you let a hosting company run dedicated servers. Multi-tenant, like SharePoint online – this is what I am talking about in this blog post. Also known as SaaS (Software as a Service). The advantages of a cloud solution are undeniable. Availability, (SharePoint line offers a 99.9% uptime SLA) Reliability. Cost. Due to economies of scale, and no need to hire specialized dedicated staff. Scalability. Security. Flexibility – grow or shrink as you need to. If you are seriously considering SharePoint 2010 in the cloud, there are some things you need to know about SharePoint online. What will work - OOTB Customization, collaboration features etc. will work SharePoint Designer 2010 is supported, so no code workflows will work Visual Studio sandbox solutions, client object model will work. What won’t work - SharePoint 2010 online cloud environment supports only sandbox solutions. BCS, business connectivity services is not supported in SharePoint online. What you can do however is to host your services in Azure, and call them using Silverlight. Custom timer jobs will not work. Long story short, get used to Sandbox solutions – and the new way of programming. Sandbox solutions are pretty damn good. Most of the complaints I have heard around sandbox solutions being too restrictive, are uninformed mechanisms of doing things mired in the ways of 2002. .. or you could just live in 2002 too. Comment on the article ....

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  • Collision planes confusion

    - by Jeffrey
    I'm following this tutorial by thecplusplusguy and in the linked video he explain that for example for the world basement and walls we need to create the actual rendered (shown to the player) walls and then duplicate them, place them in the same coordinates as the rendered walls and call them collision (by defining their material to collision). Then it defines in the Object loader function that those objects with material == collision are collision planes and should not be rendered but just used to check collision. Now I'm pretty confused. Why would we add this kind of complexity to a problem that can easily be solved by a simple loadObject(string plane_object, bool check_collision);: Creating only the walls object (by loading .obj file in plane_object) Define them also as collision planes whenever the check_collision is set to true In this case we have lowered the complexity of his method and make it more flexible and faster to develop (faster because we don't always have to make a copy for each plane and flexible because we don't hardcode the Object loader). The only case in which this method could not work is when we need hidden collision planes, and for that we could modify the loadObject() function like this: loadObject(string plane_object, bool check_collision = true, bool hide_object = false); Creating only the walls object (by loading .obj file in plane_object) Define them also as collision planes whenever the check_collision is set to true And add the ability to actually show the object or hide it based on hide_object. The final question is: am I right? What would the possible problem encountered with my solution versus his?

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  • ORM and component-based architecture

    - by EagleBeek
    I have joined an ongoing project, where the team calls their architecture "component-based". The lowest level is one big database. The data access (via ORM) and business layers are combined into various components, which are separated according to business logic. E.g., there's a component for handling bank accounts, one for generating invoices, etc. The higher levels of service contracts and presentation are irrelevant for the question, so I'll omit them here. From my point of view the separation of the data access layer into various components seems counterproductive, because it denies us the relational mapping capabilities of the ORM. E.g., when I want to query all invoices for one customer I have to identify the customer with the "customers" component and then make another call to the "invoices" component to get the invoices for this customer. My impression is that it would be better to leave the data access in one component and separate it from business logic, which may well be cut into various components. Does anybody have some advice? Have I overlooked something?

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  • Missing management console for Symantec Antivirus, Corporate Edition

    - by Alex C.
    I work for a small (80 employees) non-profit organization. We have a Windows network with a domain. The file server is running Server 2003. A vendor recently installed Symantec Antivirus, Corporate Edition, ver. 10.1.8.8000. It used to be the case that when I logged in to the file server as administrator, I would see an icon on the desktop that took me to the management console for the antivirus software. I could check logs, statuses of client machines, set policies, etc. That icon is now missing, and I can't find anything relevant under the "Start" menu. There is an entry for Symantec Antivirus, but that only gives me the panel for the client process, not the overall management console for the whole network. I don't want to call the vendor back to fix this (I'm baffled how we lost the icon in the first place). Can someone offer some guidance?

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  • how to change VMWare 1.x guest boot order

    - by bo gusman
    I have 4 VMs on a linux host, call them A, B, C, D running on Z. I really don't care when A and B come up, but I would like to make sure that D comes up before C. I believe that in VMWare 2.x it's possible to change the boot order. Is this possible in 1.x as well? Is this done in /etc/vmware/vm-list? I see that there are a number of vms listed there, including some that have long since been deleted. Thanks! Bo

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  • Public IP shows strange characters and Facebook registers logged-in session to a different location

    - by Stuart Kershaw
    I'm encountering some IP strangeness today and hoping to find an explanation. In short, I'm based in Seattle, WA with my ISP being Comcast. While browsing Facebook's account settings, I noticed that my active session was located to Mount Laurel, NJ. At that point I ran a search in Google for 'my public IP', which returned an interesting result: a string of characters in the following format: 2601:8:b000:xxx:xxxx:xxxx:xxxx:xxxx Normally, a search for my IP returns something like: 67.xxx.xx.xxx A phone call to Comcast got me nowhere, but using Comcast's phone-menu debugging tools, I was able to send a 'refresh signal' to my modem. After that, the search for 'my public IP' yielded the expected result... for about 5 minutes, and then it returned to the new string of characters. Does anyone know of an explanation for this?

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  • Java Embedded @ JavaOne

    - by Tori Wieldt
    Developers, tell your manager (or the other half of your developer-entrepreneur self) about this new event being held Wednesday, Oct. 3th and Thursday, Oct. 4th in San Francisco at the Hotel Nikko (during JavaOne).Java Embedded @ JavaOne is designed to provide business and technical decision makers, as well as Java embedded ecosystem partners, a unique occasion to come together and learn about how they can use Java Embedded technologies for new business opportunities. The ideal audience for this event is business and technical decision makers (e.g. System Integrators, CTO, CXO, Chief Architects/Architects, Business Development Managers, Project Managers, Purchasing managers, Technical Leads, Senior Decision Makers, Practice Leads, R&D Heads, and Development Managers/Leads).A call for papers has gone out, but is ONLY for business-focused submissions. Event organizers are looking for best practices, case studies and panel discussions on emerging opportunities in the Java embedded space. Please consider submitting a paper. The deadline for submission is July 18.Attendees of both JavaOne and Oracle Openworld can attend Java Embedded @ JavaOne by purchasing a $100.00 USD upgrade to their full conference pass. Rates for attending Embedded @ JavaOne alone are here.

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  • Initiate a PHP class where class name is a variable

    - by ed209
    I need some help with an error I have not encountered before and can't seem to find anywhere. In a PHP mvc framework (just from a tutorial) I have the following: // Initiate the class $className = 'Controller_' . ucfirst($controller); if (class_exists($className)) { $controller = new $className($this->registry); } $className is showing the correct class name (case is also correct). But when I run it I get this in the apache error log (no php error) [Wed Mar 31 10:34:12 2010] [notice] child pid 987 exit signal Segmentation fault (11) Process id is different on every call. I am running PHP 5.3.0 on os x 10.6. This site seems to work on 5.2.11 on another Mac. Not really sure where to go next to debug it. I guess it could be an apache setting as much as a php bug or a problem with the code... any suggestions on where to look next?

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  • Java Embedded @ JavaOne

    - by Tori Wieldt
    Developers, tell your manager (or the other half of your developer-entrepreneur self) about this new event being held Wednesday, Oct. 3th and Thursday, Oct. 4th in San Francisco at the Hotel Nikko (during JavaOne).Java Embedded @ JavaOne is designed to provide business and technical decision makers, as well as Java embedded ecosystem partners, a unique occasion to come together and learn about how they can use Java Embedded technologies for new business opportunities. The ideal audience for this event is business and technical decision makers (e.g. System Integrators, CTO, CXO, Chief Architects/Architects, Business Development Managers, Project Managers, Purchasing managers, Technical Leads, Senior Decision Makers, Practice Leads, R&D Heads, and Development Managers/Leads).A call for papers has gone out, but is ONLY for business-focused submissions. Event organizers are looking for best practices, case studies and panel discussions on emerging opportunities in the Java embedded space. Please consider submitting a paper. The deadline for submission is July 18.Attendees of both JavaOne and Oracle Openworld can attend Java Embedded @ JavaOne by purchasing a $100.00 USD upgrade to their full conference pass. Rates for attending Embedded @ JavaOne alone are here.

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  • Game: Age of Empires sound good but video "out of range"

    - by Ezekiel
    I'm new to the Ubuntu realm. Currently i'm using Linux Mint 12 with Wine 1.4 and PLAYONLINUX as game loading/playing programs. Video card is MSI GeForce FX5200 (NVIDIA) and is 3d enabled. I can play "Call of Duty 5 demo just fine. My real love is the Age of Empires series games. I loaded the WINE version of AOE 1 demo. No sound and no picture. Black screen with "Out of Range" window in red. I loaded my CD version of AOE 1 through PLAYONLINUX. I get the sound just fine but again the black screen with "Out of Range" window in red. I have used all the monitor settings in both the "settings" and in winecfg. None of the eight monitor options worked in any combination. I have checked all the questions and blogs on this error and tried all I found and no one seems to come up with a real fix. I guess I need to know exactly what the "Out of Range" means. Any help? Anywhere? Thanks

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  • license and copyright assignment

    - by corintiumrope
    I'm currently working on a wordpress plugin. My client gives me a specs doc (a powerpoint presentation, if you can call that a specs doc), and I code the requested functionality. Every time I send him code every file containing code starts with these lines: Author: My Name Copyright: The_client's_company.com License: MIT Expat (http://en.wikipedia.org/wiki/Expat_License) My intention being giving my client complete right to relicense and distribute the code under any other license (as the TOS of the freelancing website requires, plus I know he intends to sell it under a proprietary license), but at the same time giving myself the right to expand and redistribute the plugin under MIT license if I wish to (not that I do). The reason is I am paid only 10USD/hour (this is my first gig) so I want to at least keep the right to reuse parts of the code in other projects or expand it if I want to start a similar project myself when I finish the contract (unlikely, but who knows...) or show it to potential employees. The contract we agreed upon doesn't include any licensing specifications but I've informed him on the emails we've interchanged that although all my work is licensed by default as MIT I'm giving my clients the copyright of the code I produce so they can relicense it at will before distribution. Is this the correct way of achieving that?

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  • OAuth2 vs Public API

    - by Adam Tannon
    My understanding of OAuth (2.0) is that its a software stack and protocol to allow 2+ web apps to share information about a single end user. User A is a member of Site B and Site C; Site B wants to fetch some data from Site C about User A, and this is where OAuth steps in. So first off, if this assessment is incorrect, please begin by clarifying this for me and correcting me! Assuming I'm on the right track, then I guess I'm not seeing the need for OAuth to begin with (!). I'm sure I'm just not seeing the "forest through the trees" here, but the way I see it, couldn't Site C just expose a public API that Site B could use to fetch the same data (sans OAuth)? If Site C required user credentials to access the data, could this public API just use HTTPS for secure transport and require username/password as a part of each API call? Again, I'm sure I'm missing something, but I'm just not understanding why I would need OAuth when a secure, public API written and exposed by Site C seems more than capable of delivering what Site B needs regarding User A. In general, I'm looking for a set of guidelines to go by when deciding to choose between using OAuth for my web apps or just writing my own web service ( exposing public API). Thanks in advance!

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  • Which programming language should i choose? (much more info inside) [closed]

    - by Andreas
    I am not completely sure if this is the right place to put this question, but since it's the programming thread I guessed that there's many experienced programmers here. :) Ok, hello! My name is Andreas and I am a 16 years old guy from Norway. For some time now I've wanted to learn a programming language. Six months ago I started learning C++, but quit withing a week due to lack of motivation. The same thing happend only 2 months ago when I tried to learn Lua. I wanted to program mods to the game Garry's mod, and was really motivated. Then I stopped playing the game, and the programming stopped with it. Today though I am ready again. The only difference is that I am not completely sure what I want to do with the language. I only want to create something, and I miss the progress of failing and enduring hard work until I finally solve the problem I've worked on for hours. What I am trying to say is; Is there any program out there that allows me, a complete noob (I didn't learn that much in a week, so I like to call myself a beginner), to create apps, mods or something similar but at the same time being qualified as a first time language? I was thinking of Java, because Android, Minecraft and many other applications and games use it. But I've heard that it is going to be replaced by a program called HTML 5 (whatever that is), is this true? I certainly don't want to spend many hours of my life on something that is useless in a year or two. Hopefully I didn't make this too complicated. I know that it is hard to recommend something when I don't have a goal, but I really don't know what to say. Have a good day kind folks! - Andreas EDIT:* I did not know that this was an off topic question, really sorry!

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  • What's the proper term for a function inverse to a constructor - to unwrap a value from a data type?

    - by Petr Pudlák
    Edit: I'm rephrasing the question a bit. Apparently I caused some confusion because I didn't realize that the term destructor is used in OOP for something quite different - it's a function invoked when an object is being destroyed. In functional programming we (try to) avoid mutable state so there is no such equivalent to it. (I added the proper tag to the question.) Instead, I've seen that the record field for unwrapping a value (especially for single-valued data types such as newtypes) is sometimes called destructor or perhaps deconstructor. For example, let's have (in Haskell): newtype Wrap = Wrap { unwrap :: Int } Here Wrap is the constructor and unwrap is what? The questions are: How do we call unwrap in functional programming? Deconstructor? Destructor? Or by some other term? And to clarify, is this/other terminology applicable to other functional languages, or is it used just in the Haskell? Perhaps also, is there any terminology for this in general, in non-functional languages? I've seen both terms, for example: ... Most often, one supplies smart constructors and destructors for these to ease working with them. ... at Haskell wiki, or ... The general theme here is to fuse constructor - deconstructor pairs like ... at Haskell wikibook (here it's probably meant in a bit more general sense), or newtype DList a = DL { unDL :: [a] -> [a] } The unDL function is our deconstructor, which removes the DL constructor. ... in The Real World Haskell.

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  • Why does my VertexDeclaration apparently not contain Position0?

    - by Phil
    I'm trying to get my code from calling each individual draw call down to using at least a VertexBuffer, and preferably an indexBuffer, but now that I'm attempting to test my code, I'm getting the error: The current vertex declaration does not include all the elements required by the current vertex shader. Position0 is missing. Which makes absolutely no sense to me, as my VertexDeclaration is: public readonly static VertexDeclaration VertexDeclaration = new VertexDeclaration( new VertexElement(0, VertexElementFormat.Vector3, VertexElementUsage.Position, 0), new VertexElement(sizeof(float) * 3, VertexElementFormat.Color, VertexElementUsage.Color, 0), new VertexElement(sizeof(float) * 3 + 4, VertexElementFormat.Vector3, VertexElementUsage.Normal, 0) ); Which clearly contains the information. I am attempting to draw with the following lines: VertexBuffer vb = new VertexBuffer(GraphicsDevice, VertexPositionColorNormal.VertexDeclaration, c.VertexList.Count, BufferUsage.WriteOnly); IndexBuffer ib = new IndexBuffer(GraphicsDevice, typeof(int), c.IndexList.Count, BufferUsage.WriteOnly); vb.SetData<VertexPositionColorNormal>(c.VertexList.ToArray()); ib.SetData<int>(c.IndexList.ToArray()); GraphicsDevice.DrawIndexedPrimitives(PrimitiveType.TriangleList, 0, 0, vb.VertexCount, 0, c.IndexList.Count/3); Where c is a Chunk class containing an 8x8x8 array of boxes. Full code is available at https://github.com/mrbaggins/Box/tree/ProperMeshing/box/box. Relevant locations are Chunk.cs (Contains the VertexDeclaration) and Game1.cs (Draw() is in Lines 230-250). Not much else of relevance to this problem anywhere else. Note that large commented sections are from old version of drawing.

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  • Unity calendar lens not showing events in Ubuntu 12.04

    - by David_G
    I'm trying to get proper/useful calendar integration into Ubuntu 12.04. I have a Google Calendar (& account) and I want to be able to use this without opening the browser. I want to get the Unity Calendar lens working, so that it shows events coming up, and it allows me a quick way to add new events. However, after installing it, it does not find any events, nor allow me to add a new event. Note that I've installed Lightning 1.4, Evolution mirror 0.2.3, Evolution, and unity-calendar lens. I've also installed Calendar-indicator. I suspect that somehow the lens is not getting the calendar information from thunderbird via evolution. A bit of searching around led me to try this command: /usr/lib/calendar-lens/calendar-lens-daemon.py. With this result: /usr/lib/python2.7/dist-packages/gobject/constants.py:24: Warning: g_boxed_type_register_static: assertion `g_type_from_name (name) == 0' failed import gobject._gobject Traceback (most recent call last): File "/usr/lib/calendar-lens/calendar-lens-daemon.py", line 324, in daemon = Daemon() File "/usr/lib/calendar-lens/calendar-lens-daemon.py", line 80, in init for calendar in evolution.ecal.list_calendars(): AttributeError: 'NoneType' object has no attribute 'list_calendars' Any ideas?

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  • how to change VMWare 1.x guest boot order

    - by bo gusman
    I have 4 VMs on a linux host, call them A, B, C, D running on Z. I really don't care when A and B come up, but I would like to make sure that D comes up before C. I believe that in VMWare 2.x it's possible to change the boot order. Is this possible in 1.x as well? Is this done in /etc/vmware/vm-list? I see that there are a number of vms listed there, including some that have long since been deleted. Thanks! Bo

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  • how to prevent log output from PostgreSQL stored procedure ?

    - by ssc
    I am running a number of PostgreSQL scripts that used to produce excessive log output. I managed to reduce most of the output to an acceptable amount by passing --quiet as parameter to the psql command line client and adding SET client_min_messages='warning'; to the beginning of my SQL scripts. This works fine for most basic statements like SELECT, INSERT, UPDATE, etc.) However, when I call a stored function in a script using e.g. SELECT my_func(my_args);, there is still log output similar to my_func (omitted a long with many '-' here because SF thinks that's a headline) (1 row) The output is useless; it only makes me having to scroll back up a long way after the script has run and also makes it much harder than necessary to spot any relevant error output. How can I get rid of it ?

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  • Naming a class that processes orders

    - by p.campbell
    I'm in the midst of refactoring a project. I've recently read Clean Code, and want to heed some of the advice within, with particular interest in Single Responsibility Principle (SRP). Currently, there's a class called OrderProcessor in the context of a manufacturing product order system. This class is currently performs the following routine every n minutes: check database for newly submitted + unprocessed orders (via a Data Layer class already, phew!) gather all the details of the orders mark them as in-process iterate through each to: perform some integrity checking call a web service on a 3rd party system to place the order check status return value of the web service for success/fail email somebody if web service returns fail constantly log to a text file on each operation or possible fail point I've started by breaking out this class into new classes like: OrderService - poor name. This is the one that wakes up every n minutes OrderGatherer - calls the DL to get the order from the database OrderIterator (? seems too forced or poorly named) - OrderPlacer - calls web service to place the order EmailSender Logger I'm struggling to find good names for each class, and implementing SRP in a reasonable way. How could this class be separated into new class with discrete responsibilities?

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  • Demoted domain controller and now IIS has permissions issues

    - by tladuke
    I have a machine that was a domain controller and everything else, includin an IIS site. I built new 2 new domain controllers and transferred the FSMO roles and waited a day and then demoted the original domain controller. Now the IIS site says : HTTP Error 401.2 - Unauthorized You are not authorized to view this page due to invalid authentication headers. I have a call in with the web app vendor, but maybe someone can guess what I need to fix now. I haven't looked at IIS since this was installed and am pretty lost. I thought about restoring the machine from a backup, but I think that would be an Active Directory disaster, right? The server is Windows 2008 (not R2). The new DCs are 2008 R2

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  • Restore Failure from Ubuntu One

    - by Qawi Robinson
    Had to do a reinstall of Ubuntu 12 after 13.10 failed. Lost all my data, but I remembered that I had data backed up to Ubuntu One. It recognized my previous backups but I got errors and a restore failure when I went to restore the data. This is what I got. Can anyone make heads or tails of this? I still don't have my data. Thanks. Traceback (most recent call last): File "/usr/bin/duplicity", line 1412, in <module> with_tempdir(main) File "/usr/bin/duplicity", line 1405, in with_tempdir fn() File "/usr/bin/duplicity", line 1339, in main restore(col_stats) File "/usr/bin/duplicity", line 630, in restore restore_get_patched_rop_iter(col_stats)): File "/usr/lib/python2.7/dist-packages/duplicity/patchdir.py", line 522, in Write_ROPaths for ropath in rop_iter: File "/usr/lib/python2.7/dist-packages/duplicity/patchdir.py", line 495, in integrate_patch_iters final_ropath = patch_seq2ropath( normalize_ps( patch_seq ) ) File "/usr/lib/python2.7/dist-packages/duplicity/patchdir.py", line 475, in patch_seq2ropath misc.copyfileobj( current_file, tempfp ) File "/usr/lib/python2.7/dist-packages/duplicity/misc.py", line 166, in copyfileobj buf = infp.read(blocksize) File "/usr/lib/python2.7/dist-packages/duplicity/librsync.py", line 80, in read self._add_to_outbuf_once() File "/usr/lib/python2.7/dist-packages/duplicity/librsync.py", line 94, in _add_to_outbuf_once raise librsyncError(str(e)) librsyncError: librsync error 103 while in patch cycle

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