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• Sqlalchemy layout with WSGI application

  - by TheDude

  I'm working on writing a small WSGI application using Bottle and SqlAlchemy and am confused on how the "layout" of my application should be in terms of SqlAlchemy. My confusion is with creating engines and sessions. My understanding is that I should only create one engine with the 'create_engine' method. Should I be creating an engine instance in the global namespace in some sort of singleton pattern and creating sessions based off of it? How have you done this in your projects? Any insight would be appreciated. The examples in the documentation dont seem to make this entirely clear (unless I'm missing something obvious). Any thoughts?

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• c++ Using const in a copy constructor?

  - by Anton

  I have never written copy constructor, so in order to avoid pain i wanted to know if what i have coded is legit. It compiles but i am not sure that it works as a copy constructor should. Also do i have to use const in the copy constructor or i can simply drop it. (What i dont like about const is that the compiler cries if i use some non const functions). //EditNode.h class EditNode { explicit EditNode(QString elementName); EditNode(const EditNode &src); } //EditNodeContainer.h class EditNodeContainer : public EditNode { explicit EditNodeContainer(QString elementName); EditNodeContainer(const EditNodeContainer &src); } //EditNodeContainer.cpp EditNodeContainer::EditNodeContainer(QString elementName):EditNode(elementName) { } //This seems to compile but not sure if it works EditNodeContainer::EditNodeContainer(const EditNodeContainer &src):EditNode(src) { } //the idea whould be to do something like this EditNodeContainer *container1 = new EditNodeContainer("c1"); EditNodeContainer *copyContainer = new EditNodeContainer(container1);

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• PHP/HTML Strange refresh problem

  - by user270797

  After I upload my PHP files to my web host, I view the page by the URL. So what I usually do as I work on the page is make a change, upload, then refresh the browser to view my changes. What I find is that sometimes I refresh and it shows me a previous version of the page, I hit refresh 5 times and it shows me 5 different versions of the page some old changes some new changes, it makes it really difficult to know which is the latest version. I dont think this is a local caching problem, Ive disabled caching in all browsers, the problem occurs in IE, FF, Chrome I have a feeling it might be the web server. I believe the hosting company uses Zeus (?) web server product.

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• Optional structural typing possibilty in C++ or anyother language?

  - by ambhai

  In C++ how to tell compiler that Ogre::Vector3 IS_SAME_AS SomeOtherLIB::Vector3 ? I feel that.. in languages like c++ which are not structural typed but there are cases when it makes sense. Normally as game developer when working with 4+ libraries that provide sort or their own Vector3 implementation. The code is littered with ToOgre, ToThis, ToThat conversion function. Thats a lot of Float3 copying around which should not happen on first place. Is in C++ or any other languages where we dont have to convert (copying) from one type to another which is essentially the samething. But any solution in C++ as most of the good gamedevs libs are for c/c++.

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• ORA-12560: TNS:protocol adaptor error after delete one database

  - by malihe

  i have oracle11g desktop. For my project I create 3 databases via configuration assistant tools. Then I delete one of them and after this I have the error: ora-12560. By mistake both of my databases have the same pasword, for example: when i want to connect one of these data bases with system user, i have one pasword and perhaps the databases dont know connect which one. I start all services set oracle_sid=orcl. I run lsnrctl tnsping check tansname.ora & my listener.ora and I logon with sysdba@oracle_sid but i have this error again pleas help me tnx

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• How to assign Value to Key in App.config of C# win app ?

  - by karthik

  I am using the below string in my code : string AAR_FilePath = "\"C:\\MySQL\\MySQL Server 5.0\\bin\\mysqldump\""; which i dont want to hardcore in my code. So i need to use that in my app.config I tried to give the same value as, <add key="Path_SqlDump" value="\"C:\\MySQL\\MySQL Server 5.0\\bin\\mysqldump\""></add> But the above gives me error, because of the quotes. All i need is, i should be able to assign "\"C:\MySQL\MySQL Server 5.0\bin\mysqldump\"" to a string. HOW ?

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• Exception handling in Linq to SQL for customers without orders

  - by stackoverflowuser

  I have the following code to retrieve customer name, total (orders ), sum (order details) for reach customer in Northwind database. The problem with below code is that it raises an exception since a few customers dont have any entry in orders table. I know using the query syntax (join) the exception can be avoided. I want to know if the same can be handled with the extension method syntax. var customerOrders = db.Customers .Select(c => new { CompanyName = c.CompanyName, TotalOrders = c.Orders.Count(), TotalQuantity = c.Orders .SelectMany(o => o.Order_Details).Sum(o=>o.Quantity) });

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• Casting problem cant convert from void to float C++

  - by Makenshi

  as i said i get this horrible error i dont really know what to do anymore float n= xAxis[i].Normalize(); thats where i get the error and i get it cuz normalize is a void function this is it void CVector::normalize() { float len=Magnitude(); this->x /= len; this->y /= len; } i need normalize to stay as void tho i tried normal casting like this float n= (float)xAxis[i].Normalize(); and it doesnt work also with static,dynamic cast,reinterpret,const cast and cant make it work any help would be really apreciated... thank you .<

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• ARC, worth it or not?

  - by MSK

  When I moved to Objective C (iOS) from C++ (and little Java) I had hard time understanding memory management in iOS. But now all this seems natural and I know retain, autorelease, copy and release stuff. After reading about ARC, I am wondering is there more benefits of using ARC or it is just that you dont have to worry about memory management. Before moving to ARC I wanted to know how worth is moving to ARC. XCode has "Convert to Objective C ARC" menu. Is the conversion is that simple (nothing to worry about)? Does it help me in reducing my apps memory foot-print, memory leaks etc (somehow ?) Does it has much testing impact on my apps ? What are non-obvious advantages? Any Disadvantage os moving to it?

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• Windows Phone and Silverlight ListBox.ItemTemplate

  - by user551308

  Hi, I have a Windows Phone 7 application with the following listbox and every item contains 2 textblocks and a HyperlinkButton. <ListBox.ItemTemplate> In the ViewModel constructor I have the following code: GetCommand = new RelayCommand(() ={some code}); where GetCommand is a property : public RelayCommand GetCommand { get; private set; } My problem is that GetCommand = new RelayCommand(() ={some code}); is not executing when I press the button. I must say that if dont place the HyperlinkButton insise the itemTemplate, everything works fine. I use the Galasoft mvvm light tookit - http://www.galasoft.ch/mvvm/getstarted/ I appreciate any help.

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• Installing CXF with Eclipse 3.5

  - by shinynewbike

  As per http://help.eclipse.org/helios/topic/org.eclipse.jst.ws.cxf.doc.user/reference/preferences.html The CXF 2.x preferences can be accessed via Window > Preferences... > Web Services > CXF 2.x Preferences from the top level menu. but I dont see the option CXF 2.x Preferences under Web Services, though I have chosen JavaEE perspective. any ideas how to enable this? Sorry for such a simple question. I also cannot do not see CXF as a Project Facet as per http://help.eclipse.org/helios/index.jsp?topic=/org.eclipse.jst.ws.jaxws.doc.user/gettingstarted/requirements.html I know this is something to do with getting Eclipse aware of CXF libraries, but cant find the tutorial for this.

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• blacklist test requests from google analytics using watir

  - by Anjali

  Hi, I have to automate tests for a web application which runs google analytics script. I have chosen watir for the automation since I can script all the test cases with the same. The only problem is i dont know how to remove my test requests to the web apps from the google analytics report. Can anyone help me with the same? Is it possible to do that with watir? If not watir, is there any other web automation tool which I could use? ~Thanks and Regarads

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• Not work variables in django templates

  - by ??????? ???????

  My context dictionary not sending to my templates. I have function from django.shortcuts import render_to_response def home(request): return render_to_response('home.html',{'test':'test'}) and i have simple template such as: <html> <body> my test == {{test}} </body> </html> When i open my site in browser, i have "my test == ". settings.py is default. I dont use something custom. What the problem? Server is apache with wsgi module.

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• c++ new & delete and string & functions

  - by Newbie

  Okay the previous question was answered clearly, but i found out another problem. What if i do: char *test(int ran){ char *ret = new char[ran]; // process... return ret; } And then run it: for(int i = 0; i < 100000000; i++){ string str = test(rand()%10000000+10000000); // process... // no need to delete str anymore? string destructor does it for me here? } So after converting the char* to string, i dont have to worry about the deleting anymore?

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• Is it possible to use dex2jar converted jar file into your project

  - by swapnil adsure

  i want to use ffmpeg decoder for my android project but i am having lots of error and config problem to compile it. but today i read about apk recompiling by dex2jar. so My question is " it is possible to use that dex2jar.jar file into your project ?. Like is it possible for me to use ffmpeg decoder into my project by importing that jar file into my project?. and same case with vitamio plugin . so if it is possible than i just need to add that plugin jar into my project and link with code and user dont need to download extra plugin. waiting for reply thank you

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• Tomcat JSP(2.0) Document how to stop automaticly closing empty body tags with /> instead of </tagnam

  - by JOKe

  The question is. If I use JSP Documents (or JSP 2.0) and If I put a TAG without a BODY it is automaticly closed I dont want that. so If I have <div id=....> </div> it is automaticly converted to <div id=.../> How I can stop this ? I am using tomcat is there any configuration about that ? P.S. the reason to want to stop it is because it simple "fuckes" the JQuery stuffs that the designer company are using.

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• Single Query returning me 4 tables, How to get all of them back into dataset ?

  - by Shantanu Gupta

  How to fill multiple tables in a dataset. I m using a query that returns me four tables. At the frontend I am trying to fill all the four resultant table into dataset. Here is my Query. Query is not complete. But it is just a refrence for my Ques Select * from tblxyz compute sum(col1) suppose this query returns more than one table, I want to fill all the tables into my dataset I am filling result like this con.open(); adp.fill(dset); con.close(); Now when i checks this dataset. It shows me that it has four tables but only first table data is being displayed into it. rest 3 dont even have schema also. What i need to do to get desired output

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• vista bandwith reservation

  - by user185646

  I would like to write my own version of Microsoft Live labs pivot.http://www.getpivot.com/ For this i will use realtime texture streaming technology like John Carmack did for doom4. But i would like to use Windows vista SetFileBandwidthReservation api to have the best throughput possible. For example // reserve bandwidth of 200 bytes/sec result = SetFileBandwidthReservation( hFile, 1000, 200, FALSE, &transferSize, &outstandingRequests ); What i dont understand is the lpTransferSize and lpNumOutstandingRequests return parameters. How should i next read the file for this to be the most worth it. Should i do exactly lpNumOutstandingRequests number of request of size lpTransferSize. Or can i do one synchronous request bigger than lpTransferSize.

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• Combining Cocoa and MySQL

  - by BryCry

  Hey guys, i was searching SO for help on this, but i can't seem to find a concrete solution. Is, or isn't it possible to connect to a mysql database with Cocoa? Because i'm working on a program that i'd like to extend to a database, but i sure as hell don't know how! I mean, that cocoa-mysql package is heavily outdated, and i dont even know what a C wrapper is! Can someone please tell me how to do this, or atleast burst my bubble to tell me that it can't be done? Thanks!

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• Printing out series of numbers in java

  - by Jay

  hi guys i am just doing some reading for myself to learn java and came across this problem and is currently stuck. i need to print out series of number based on the input given by the user. for example, if input = 5, the output should be as follows @1@22@333@4444@55555 import java.util.*; public class ex5{ public static void main(String[] args){ Scanner kb = new Scanner(System.in); System.out.println("Please type a #: "); int input = kb.nextInt(); for(int i=0;i<input;i++){ if(input==1){ System.out.print("@1"); } if(input==2){ System.out.print("@1@22"); } } } } this doesnt seem to be working because this is the output i get Please type a #: 2 @1@22@1@22 im not sure what to put inside the for loop right now and i dont think i am using the for loop here very well either... any help guys?

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• Must a Language that Implements Monads be Statically Typed?

  - by Morgan Cheng

  I am learning functional programming style. From this link http://channel9.msdn.com/shows/Going+Deep/Brian-Beckman-Dont-fear-the-Monads/, Brian Beckman gave a brilliant introduction about Monad. He mentioned that Monad is about composition of functions so as to address complexity. A Monad includes a unit function that transfers type T to an amplified type M(T); and a Bind function that, given function from T to M(U), transforms type M(T) to another type M(U). (U can be T, but is not necessarily). In my understanding, the language implementing monad should be type-checked statically. Otherwise, type errors cannot be found during compilation and "Complexity" is not controlled. Is my understanding correct?

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• triggers for generating userID based on user's information.

  - by nectar

  I have complaint table 1. tblProfile with columns userId | name | age | address | mobileno | 2. tblUserId with columns userId | role | status now when user fills the form I want to insert one row in tblProfile, before inserting a new row I want to create userId by combining starting letters of name and mobile no and then insert into tblprofile with userId after this I want to insert that UserId into tblUserId table. for this I have to use two triggers one is before insert trigger and another is after insert trigger.but I dont know how to capture user information to create userId and how to pass that Id to second trigger.

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• Inverse relationship of two variables

  - by Jam

  this one is maybe pretty stupid.. Or I am just exhausted or something, but I just cant seem to solve it.. Problem : two variables X and Y, value of Y is dependent on value of X. X can have values ranging from some value to some value (lets say from 0 to 250) and y can have different values (lets say from 0.1 to 1.0 or something..) - but it is inverse relatonship (what I mean is: if value of X is e.g. 250, then value of Y would be 0.1 and when X decreases up to 0, value of Y raises up to 1.0.. So how should I do it? lets say I have function: -- double computeValue (double X) { /computation/ return Y; } Also, is there some easy way to somehow make the scaling of the function not so linear? - For example when X raises, Y decreases slower at first but then more rapidly in the end.. (rly dont know how to say it but I hope you guys got it) Thanks in advance for this stupid question :/

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• How to later assign value to optional attribute of NSManagedObject in a NSManagedObjectModel having

  - by Kundan

  I am using coredata framework. In my NSManagedObjectModel i am using three entities that are Class, Student and Score where class and student have one-to-many & inverse relationship and Student and Score have also inverse but one-one relationship. Score entity has all optional attributes and having default '0' decimalVaue, which is not assigned at the time new Student is added. But later i want to assign them score individually and also to particular attribute not all of score attributes in a go. I am able to create and add Students to particular Class but dont have any idea how to call particular student and assign them score. For example I want to assign Score'attribute "dribbling" [there are many attributes like "tackling"] a decimal value to Student "David" of Class "Soccer" ,how i can do that? Thanks in advance for any suggestion.

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• Need help with htacess - over and over

  - by Holian

  Hello! I have this lines in my .htacess Options +FollowSymLinks RewriteEngine on RewriteCond %{HTTP_HOST} ^mydomain.org [NC] RewriteRule ^(.*)$ http://www.mydomain.org/$1 [L,R=301] # index.php to / RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /.*index\.php\ HTTP/ RewriteRule ^(.*)index\.php$ /$1 [R=301,L] # forum RewriteCond %{REQUEST_URI} !^/forums/ RewriteRule index.php/(.*) http://forum.mydomain.org/$1 [R=301,L] This code is works well, but i dont know if the code is standard. I would like to set htaccess to: mydomain.org go to www.mydomain.org (its ok..) mydomain.org/index.php go to www.mydomain.org (its ok..) forum.mydomain.org stay forum.mydomain.org (its ok..? ) www.forum.mydomain.org go to forum.mydomain.org (how?) Could anyone help me to fix this code? Thank you.

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