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• Difference between putting variables in header vs putting variables in source

  - by Mohit Deshpande

  Say I declare a header file with a variable: int count; Then in the source file, I want to use count. Do I have to declare it as: extern int count Or can I just use it in my source file? All assuming that I have #include "someheader.h". Or should I just declare it in the source file? What is the difference between putting count in the header file vs the source file? Or does it not matter?

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• Wrapping/warping a CALayer/UIView (or OpenGL) in 3D (iPhone)

  - by jbrennan

  I've got a UIView (and thus a CALayer) which I'm trying to warp or bend slightly in 3D space. That is, imagine my UIView is a flat label which I want to partially wrap around a beer bottle (not 360 degrees around, just on one "side"). I figured this would be possible by applying a transform to the view's layer, but as far as I can tell, this transform is limited to rotation, scale and translation of the layer uniformly. I could be wrong here, as my linear algebra is foggy at this point, to say the least. How can I achieve this?

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• virtual function call from base of base

  - by th3g0dr3d

  hi, let's say i have something like this (very simplified): <pre><code> class base { void invoke() { this-foo(); } virtual void foo() = 0; }; class FirstDerived : public base { void foo() { // do stuff } }; class SecondDerived : public FirstDerived { // other not related stuff } int main() { SecondDerived *a = new SecondDerived(); a-invoke(); } What i see in the debugger is that base::invoke() is called and tries to call this-foo(); (i expect FirstDerived::foo() to be called), the debugger takes me to some unfamiliar assembly code (probably because it jumped to unrelated areas) and after few lines i get segmentation fault. am i doing something wrong here? :/ thanks in advance

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• nsthread in iphone xcode

  - by BibiBuBu

  Good Day! i want to use nsthreads in a project of xcode that will call a function which is for the network access and will check that if the network is there or not, so i need to have a thread which will execute after lets say 1 minutes to check the connectivity. and will continue run unless the app is closed. [NSThread detachNewThreadSelector:@selector(startTheBackgroundJob) toTarget:self withObject:nil]; startTheBackgroundJob NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; // wait for 3 seconds before starting the thread, you don't have to do that. This is just an example how to stop the NSThread for some time [NSThread sleepForTimeInterval:5]; //[self performSelectorInBackground:@selector(checkNet) withObject:nil]; [self performSelectorOnMainThread:@selector(checkNet) withObject:nil waitUntilDone:YES]; [pool release]; it works only for the first time but not any other, i mean only 1 loop it makes can somebody help me in this regard. Thanks

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• Private members when extending a class using ExtJS

  - by Protron

  I have done some research on the ExtJS forum regarding private methods and fields inside a extended class, and I couldn't find any real answer to this. And when I say an extended class I mean something like this: Ext.ux.MyExtendedClass = Ext.extend(Ext.util.Observable, { publicVar1: 'Variable visible from outside this class', constructor: function(config) { this.addEvents("fired"); this.listeners = config.listeners; }, // to show that I need to use the base class publicMethod1: function() { return 'Method which can be called form everywhere'; }, publicMethod2: function() { return this.publicMethod1() + ' and ' + this.publicVar1; } // to show how to access the members from inside another member }); The problem here is that everything is public. So, how do I add a new variable o method within the scope of MyExtendedClass that cannot be accessed from outside but can be access by the public methods?

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• How to Transform a user's search string into a MS SQL Full-Text Search Phrase

  - by Atomiton

  I've search for answers for this and I can't seem to find an answer to what should be somewhat simple. This is related to another question I asked, but it's different. What's the best way to take a user's search phrase and throw it into a CONTAINSTABLE(table, column, @phrase, topN ) phrase? Say, for example the user inputs: Books by "Dr. Seuss" What's the best way to turn that into something that will return results in my ContainsTAble() phrase? I was previously parsing the search phrase and writing something like ISABOUT("Books" WEIGHT(1.0), "by" WEIGHT(0.9), "Dr. Seuss" WEIGHT(0.8)) as my @phrase but ISABOUT seems to be returning odd results... especially when one word searches are entered. Any Ideas?

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• Real world uses of Reflection.Emit

  - by Ryu

  In all the books I've read on reflection they often say that there aren't many cases where you want to generate IL on the fly, but they don't give any examples of where it does make sense. After seeing Reflection.Emit as a job requirement for a gaming company I was curious where else it's being used. I'm now wondering if there are any situations you've seen in the real world were it was the best solution to the problem. Perhaps it is used as an implementation to a design pattern? Note I imagine PostSharp / AOP uses it.

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• JPQL get most recent rows

  - by Vinnie

  Let's say I have the following tables my_profile_data ------------- integer: profile_id date: date_changed string: value my_profile ------------- integer: profile_id string: name I want to get the most recent profile information. In plain SQL this would look something like: select mpd.profile_id, mpd.value, max(mpd.date_changed) from my_profile_data mpd, my_profile mp where mpd.profile_id = mp.profile_id and mp.name='The Profile I Want' group by mpd.profile_id I've tried different variants of the following JPQL query, but cant get it to work. SELECT mpd FROM MyProfileData mpd LEFT JOIN (SELECT mpd.profileId profileId, MAX(mpd.dateChanged) FROM MyProfileData mpd LEFT JOIN mp.profile WHERE mp.name = :name GROUP BY mpd.profileId) recent ON (rp.profileid = recent.profileId) Is this query doable in JPA? I'm using EclipseLink as my JPA provider. The innermost exception I get when I try to run this is Caused by: NoViableAltException(81!=[506:7: (n= joinAssociationPathExpression ( AS )? i= IDENT | t= FETCH n= joinAssociationPathExpression )]) at org.eclipse.persistence.internal.jpa.parsing.jpql.antlr.JPQLParser.join(JPQLParser.java:3669) ... 73 more

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• Detect Applet context (am I inside an applet?)

  - by 7macaw

  Hi, I'm wondering if there's a way for a Java class to figure out if it is being used within an applet? That is, I have a library (a .jar file) that can be used by 3rd-party applications and applets. It does work within applets, but I'd like to do some things differently, depending on whether or not the library is used in an applet - like show applet-applicable errors, avoid local file I/O, etc. It would be nice if, say, Applet.getAppletContext() was static so that I could call it (and get NULL or not NULL) even if I don't have an applet instance, but alas, it isn't. Is there any other way?

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• Co-ordinates of a element in a pdf file using iText

  - by Arun P Johny

  Hi all, I'm creating a pdf file using BIRT reporting library. Later I need to digitally sign these files. I'm using iText to digitally sign the document. The issue I'm facing is, I need to place the signature in different places in different reports. I already have the code to digitally sign the document, now I'm always placing the signature at the bottom of last page in every report. Eventually I need each report to say where I need to place the signature. Then I've to read the location using iText and then place the signature at that location. Is this possible to achieve using BIRT and iText Thanks

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• In NHibernate, how do I combine two DetachedCriteria instances

  - by Trevor

  My scenario is this: I have a base NHibernate query to run of the form (I've coded it using DetachedCriteria , but describe it here using SQL syntax): SELECT * FROM Items I INNER JOIN SubItems S on S.FK = I.Key The user interface to show the results of this join allows the user to specify additional criteria: Say: I.SomeField = 'UserValue'. Now, I need the final load command to be: SELECT * FROM Items I INNER JOIN SubItems S on S.FK = I.Key WHERE I.SomeField = 'UserValue' My problem is: I've created a DetachedCriteria with the 'static' aspect of the query (the top join) and the UI creates a DetachedCriteria with the 'dynamic' component of the query. I need to combine the two into a final query that I can execute on the NHibernate session. DefaultCriteria.Add() takes an ICriterion (which are created using the Expression class, and maybe other classes I don't know of which could be the solution to my problem). Does anyone know how I might do what I want?

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• How to retrieve row count of one-to-many relation while also including original entity?

  - by kaa

  Say I have two entities Foo and Bar where Foo has-many Bar's, class Foo { int ImportantNumber { get; set; } IEnumerable<Bar> Bars { get; set; } } class FooDTO { Foo Foo { get; set; } int BarCount { get; set; } } How can I efficiently sum up the number of Bars per Foo in a DTO using a single query, preferrably only with the Criteria interface. I have tried any number of ways to get the original entity out of a query with ´SetProjection´ but no luck. The current theory is to do something like SELECT Foo.*, BarCounts.counts FROM Foo LEFT JOIN ( SELECT fooId, COUNT(*) as counts FROM Bar GROUP BY fooId ) AS BarCounts ON Foo.id=BarCounts.fooId but with Criterias, and I just can't seem to figure out how.

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• Combine multiple dataset columns to one dataset

  - by Matt

  I have multiple datasets that I would like to combine into one. There is a common ID field that can be associated to each row. Calling Merge on the dataset will add additional rows to the dataset, but I would like to combine the additional columns. There are too many fields to do this in one query and therefore would make it unmanageable. Each individual query would be able to handle ordering to ensure the data is placed in the correct row. For Example lets say I have two queries resulting in two datasets: SELECT ID, colA, colB SELECT colC, colD The resulting dataset would look like ID colA colB colC colD 1 a b c d 2 e f g h Any ideas on ways to accomplish this?

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• Getting TypeConverter error that makes no sense

  - by Greg McGuffey

  I have a TypeConverter for a TopMostNode class. It extends ExpandableObjectConverter. The TopMostNode has two properties. Setting those in the property grid results in correctly serialized code to the designer. However, if I type in text for the property, I get a "Property value is not valid" error and the details say: Object of type 'TopMostNode' cannot be converted to type 'TopMostNode'. I'm baffled. When I step through the type converter ConvertFrom code, it runs as expected. I don't even know were to start looking for an issue like this.

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• Does Entity Framework 4 not support property automatic lazy loading for model-first entities?

  - by KallDrexx

  All references that I find for lazy loading say it's possible but they all mention POCOs and that's it. I am using EF4 with the model-first methodology. In my model diagram I have a Project table and a UserObject table, with a 1 to many relationship between them. However, in code, when I have a valid UserObject and I attempt to get the project performing: Project prj = userobj.Project. Unfortunately, this doesn't work as it claims that UserObject.Project is null. It seems like I have to explicitly load the Project object via calling UserObject.ProjectReference.Load() prior to calling .Project. Is there any way for this to occur automatically when I access the .Project property?

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• pygtk - dynamically update the widgets taking input from the gtk combo box

  - by Webrsk

  On selecting value from 1 to 10 from gtk combox box it should populate the checkbox by taking combo box value as an input. Say for example if i select 5 then 5 checkbox will be generated. It works.. But the issue is after i selected 5 now im selecting next value as 3 from combo box then there 8 checkboxes are displayed. The old 5 checkbox didnt get replaced. Is there any way to refresh the vbox(which has the checkboxes) or update to a new value. Enviroment : FC10 , Glade 2 , Python 2.5 , GTK.

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• Online Perforce Repositories

  - by Oliver Hume

  Is anyone aware of of anybody offering hosted perforce servers? It doesn't have to be free - but preferably not too expensive! My understanding of Perforce is that it's free to use for personal projects, which mine is. Currently I have a perforce server setup on the same machine as the code is on which doesn't offer much security in case of computer failure. If not, can anyone recommend one of the alternative solutions that is similar to Perforce? I have experience of SVN but cannot say I enjoy the experience.

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• jQuery(document).ready doesn't run under IIS7

  - by gsiler

  To simplify this test case, I created a new default .NET MVC project in Visual Studio 2010, and added the following code to the HTML header in Site.Master: <script type="text/javascript" src="../../Scripts/jquery-1.4.1.js"></script> <script type="text/javascript"> jQuery(document).ready(function () { alert('jQuery document ready'); }); </script> This works as expected in the .NET development server. However, when deployed to IIS7, the jQuery(document).ready function is not executed. Needless to say, my actual application is much more complicated. This eliminates all "suspects" except IIS7 deployment. Any thoughts/suggestions?

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• Updating multiple Sprites - AS3 performance best practices

  - by dani

  Within the container "BubbleContainer" I have multiple "Bubble sprites". Each bubble's graphics object (a circle) is updated on a timer event. Let's say I have 50 Bubble sprites and each circle's radius should be updated with a mathematical formula. How do I organize this logic? How do I update all Bubble sprites within the BubbleContainer? (should I call a bubble.update() function or make a temporary reference to the graphics object?) Where do I put the Math logic? (as static functions?)

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• Add a Session Variable or Custom field to the Elmah Error Log table

  - by VJ

  I want to add my own session variable to elmah error log table and display it. I already have modified the source code and added the new fields to Error.cs and other fields but I don't know but when I assign an HttpContext.Current.Session["MyVar"].tostring() value to my field in the constructor it stops logging exceptions and does not log any exception. I just need to get the value of the session variable is there other way for this. I read a post which he added fields for the email but it does not say where exactly should I get the session value.

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• create a wav file from multiple wav files in delphi

  - by Bayu

  i' ve a problem in doing my final project... i'm having trouble with how to save multiple wav files into 1 wav file.. let's take an example: i have 3 wav files which are the syllables of the word "hospital" : "hos.wav", "pi.wav", and "tal.wav" (sorry if i'm wrong in determining the syllables of the words).. each of those syllable wav files contains utterances of the syllables of the word "hospital" respectively.. my task is to merge those files so that the word hospital could be reproduced from those files. and then to save the merged file to be a new wav file, let say "hospital.wav"..I've done my first task, but not with my second task... does anyone can help me? thx b4..

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• HTML5 web storage: can different websites overwrite each other’s data on a user’s computer?

  - by Deepak Mahalingam

  I have a few questions regarding the concept of HTML5 storage. I went through the w3c specification, books and tutorials on the same, but still I am a bit unclear about certain concepts: Assume that I access Website A. Some JavaScript runs in my browser that sets a key value pair, say ('username','deepak'). Then I access Website B which also adds a key,value pair in the localstorage as ('username','mahalingam'). How will they both be differentiated? Will Website B override the value set by website A in my localstorage? How can we ensure that a website would not erase all of my localstorage?

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• Sharepoint SSO bulk creation of user accounts

  - by user292884

  Hopefully someone can help... I need to provide client with a solution to allow bulk creation of user accounts into SharePoint SSO. The client wants to provide an excel spreadsheet with accounts, usernames and passwords and have that created in the SSO database. I've been told its possible but I can't see how and google is failing me. I've been told its "some custom development and the SharePoint object model". As far as I can see all of the credentials stuff in the Microsoft.SharePoint.Portal.SingleSignon namespace is very much read only. I have a solution which is to get them to save the spreadsheet as a CSV file and to use jmeter to squirt the data in through the front end. I don't think that's really an acceptable solution though. Anyone got any clues? Or can anyone say definitively this can't be done? Thanks in advance...

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• hibernate and ehcache replication

  - by cachingsol

  Hi, I am working on a cache replication solution between nodes Node A - master node = Hibernate + Database + Ehcache as secondary cache Node B - regional node= Ehcache as prmiary cache. no Hibernate Node B is used only as near-by cache for query. Now I am updating data (Say SudentInfo) in Node A, it gets persisted and cached correctly. On replication side (I am using JMS) it sends a message to Node B. But the problem is, the message it sends is of instance CacheEntry(deep Inside Element), there is no way to resurrect the original object (StudentInfo). What I got in node B is CacheEntry with some attributes of Students but not actually an Student Object. Please note that I don't need Hibernate session/persistence in Node B, node B is only for fast query, persistence is done through Node A. So has anybody tried any solution like this? Is there any way to convert CacheEntry to actual object? or Tell ehcache to replicate original object rather than CacheEntry. Thanks for the help

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• What's wrong with the analogy between software and building construction?

  - by kuosan

  Many people like to think of building software as constructing a building so we have terms like building blocks and architecture. However, lately I've been to a couple of talks and most people say this analogy is wrong especially around the idea of having a non-coding software architect in a project. In my experience, good software architects are those who also write code so they won't design things that only looks good on paper. I've worked with several Architecture Astronauts, who have either limited or outdated experience in programming. These architecture astronauts quite often missed out critical details in their design and cause more harm than good in a project. This makes me wonder what are the differences between constructing a software and a building? How come in the building industry they can have architects who probably never build a house in their life and purely handles design work but not in the software development field?

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