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• aspectRatio = backingWidth / backingHeight ???

  - by carrots

  What am I doing wrong here, I can't get the result of this division: aspectRatio = backingWidth / backingHeight; I've thought I might try casting to (GLfloat) but that didn't do anything. As I step through the code I see that aspectRatio is 0 after the operation, while backingWidth is clearly 768 and backingHeight is 1029. Here are the types: GLfloat aspectRatio; and // The pixel dimensions of the CAEAGLLayer GLint backingWidth; GLint backingHeight; It must be something basic I'm doing wrong here..

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• Unique identification string in php

  - by NardCake

  Currently me and my friend are developing a website, for what we will call 'projects' we just have a basic auto increment id in the database used to navigate to projects such as oururl.com/viewproject?id=1 but we started thinking, if we have alot of posted projects thats going to be a LONG url. So we need to somehow randomly generate a alphanumerical string about 6 characters long. We want the chance of the string being duplicated being extremely low and of course we will query the database before assigning an identifier. Thanks for anyhelp, means alot!

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• Shared data in an ASP.NET application

  - by Barguast

  I have a basic ASP.NET application which is used to request data which is stored on disk. This is loaded from files and sent as the response. I want to be able to store the data loaded from these files in memory to reduce the number of reads from disk. All of the requests will be asking for the same data, so it makes sense to have a single cache of in-memory data which is accessible to all requests. What is the best way to create a single accessible object instance which I can use to store and access this cached data? I've looked into HttpApplication, but apparently a new instance of this is created for parallel requests and so it doesn't fit my needs.

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• How do I check that an entity is unreferenced in JPA?

  - by Martin

  I have the following model @Entity class Element { @Id int id; @Version int version; @ManyToOne Type type; } @Entity class Type { @Id int id; @Version int version; @OneToMany(mappedBy="type") Collection<Element> elements; @Basic(optional=false) boolean disabled; } and would like to allow Type.disabled = true only if Type.elements is empty. Is there a way to do it atomically? I would like to prevent an insertion of an Element in a transaction while the corresponding Type is being disabled by an other transaction.

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• Database Optimization techniques for amateurs.

  - by Zombies

  Can we get a list of basic optimization techniques going (anything from modeling to querying, creating indexes, views to query optimization). It would be nice to have a list of these, one technique per answer. As a hobbyist I would find this to be very useful, thanks. And for the sake of not being too vague, let's say we are using a maintstream DB such as MySQL or Oracle, and that the DB will contain 500,000-1m or so records across ~10 tables, some with foreign key contraints, all using the most typical storage engines (eg: InnoDB for MySQL). And of course, the basics such as PKs are defined as well as FK contraints.

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• Print the next X number of lines in Scala

  - by soulesschild

  Trying to learn Scala using the Programming in Scala book and they have a very basic example for reading lines from a file. I'm trying to expand on it and read a file line by line, look for a certain phrase, then print the next 6 lines following that line if it finds the line. I can write the script easily enough in something like java or Perl but I have no idea how to do it in Scala (probably because I'm not very familiar with the language yet...) Here's the semi adapted sample code from the Programming in Scala book, import scala.io.Source if(args.length>0) { val lines = Source.fromFile(args(0)).getLines().toList for(line<-lines) { if(line.contains("secretPhrase")) { println(line) //How to get the next lines here? } } } else Console.err.println("Pleaseenterfilename")

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• C++ pointer, Beginner Question...

  - by BobAlmond

  Hi there, just want to ask a beginner question... here, I made some code, for understanding the concept/basic of pointer: int a=1; int *b=&a; int **c = &b; int ***d = &c; cout << &*(&*d) << endl; can someone explain to me, why the &*(&d) return address of "c" instead of address of "b"? I've also tried code like &(&(&(&*(&*d)))), but it keep return address of "c" Thanks a lot :)

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• Subversion Copy Hook on Windows

  - by GeoSQL

  Hi I am working on a web based project in my free time. I have SVN set up on my machine (running XP). What I would like to do is have a copy of my repository copied to the htdocs folder (Dev machine) post-commit via a hook. That way I can test my changes in a browser. I know that I can write up a .bat file, but I'm not sure what the syntax would be. I can do a basic DOS Copy command, but I saw one example that provided a username and password to SVN at copy time. Do I need to do this? Can someone point me in the right direction as far a syntax for the .bat file? Or maybe even suggest a better method. Thanks

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• Query SQL Server Database from native iOS Application

  - by mbm30075

  I am working on an in-house, iOS app that will need read-only access to a SQL Server with multiple databases. I know the stock answer here is "write some web services", but I'd like a solution that is self-contained. Is there any way to directly connect to a SQL Server database from an iOS application? I'm thinking something like a basic ODBC connection. I've seen a lot of users asking this question, but very few answers other than "write a web service." Is that really the only way?

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• C++ dynamic array sizing problem

  - by Peter

  The basic pseudo code looks like this: void myFunction() { int size = 10; int * MyArray; MyArray = new int[size]; cout << size << endl; cout << sizeof(MyArray) << endl; } The first cout returns 10, as expected, while the second cout returns 4. Anyone have an explanation?

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• Packaging multiple rpms in one file

  - by Rajorshi

  Hi, Is it possible to paqckage multiple rpms into one file. I have got two bundles one of which requires that the other be installed. I would like to create a single installable out of them in such a way that this installer will first invoke pkg 1 and then install pkg 2. Is this possible? What about deb packages? Sorry if it a basic question. I have not worked with installers on Linux before. I have created Windows installers. There you can create two merge modules (.msm) and package them into a standalone installer (.msi) and specify the order of execution. I am looking for similar functionality on Linux.

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• How do I pass in config info to CKEditor using the jQuery adapter?

  - by alex

  I'm using the latest CKeditor with jQuery adapter. I have successfully got it to work, and display. However, as I am completely new to CKeditor, how do I pass in config variables using the jQuery method? This is what I've got $( '#input-content' ).ckeditor('', { toolbar: 'basic' }); I think from what I've read, the first argument is meant to be a callback, and the 2nd the config. But doing this has not changed the editor at all. How do I use these config properties etc using the jQuery adapter? Thanks

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• Proper code but can't insert to database

  - by Dchris

  I have a Visual Basic project using Access database.I run a query but i don't see any new data on my database table.I don't have any exception or error.Instead of this the success messagebox is shown. Here is my code: Dim ID As Integer = 2 Dim TableNumber As Integer = 2 Dim OrderDate As Date = Format(Now, "General Date") Dim TotalPrice As Double = 100.0 Dim ConnectionString As String = "myconnectionstring" Dim con As New OleDb.OleDbConnection(ConnectionString) Try Dim InsertCMD As OleDb.OleDbCommand InsertCMD = New OleDb.OleDbCommand("INSERT INTO Orders([ID],[TableNumber],[OrderDate],[TotalPrice]) VALUES(@ID,@TableNumber,@OrderDate,@TotalPrice);", con) InsertCMD.Parameters.AddWithValue("@ID", ID) InsertCMD.Parameters.AddWithValue("@TableNumber", TableNumber) InsertCMD.Parameters.AddWithValue("@OrderDate", OrderDate) InsertCMD.Parameters.AddWithValue("@TotalPrice", TotalPrice) con.Open() InsertCMD.ExecuteNonQuery() MessageBox.Show("Successfully Added New Order", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information) con.Close() Catch ex As Exception 'Something went wrong MessageBox.Show(ex.ToString) Finally 'Success or not, make sure it's closed If con.State <> ConnectionState.Closed Then con.Close() End Try What is the problem?

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• JAVA bytecode optimization

  - by Idob

  This is a basic question. I have code which shouldn't run on metadata beans. All metadata beans are located under metadata package. Now, I use reflection API to find out whether a class is located in the the metadata package. if (newEntity.getClass().getPackage().getName().contains("metadata")) I use this If in several places within this code. The question is: Should I do this once with: boolean isMetadata = false if (newEntity.getClass().getPackage().getName().contains("metadata")) { isMetadata = true; } C++ makes optimizations and knows that this code was already called and it won't call it again. Does JAVA makes optimization? I know reflection API is a beat heavy and I prefer not to lose expensive runtime.

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• wordpress plugin for certain tweets

  - by darreee

  Hello I would need to get tweets from my twitter account on my wordpress site. Okey, the basics i could do, but there is one special need. I would need to get only certain tweets. Tweets that have some #hashstag for example only tweets with hashtag #myss would show up on my wordpress site. Is there ready made plugin for this? I have been googlein for hours but have found only basic/normal twitter plugins. Also i would need to able style the feed to look same as my current site. Cheers!

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• submit button on html to output result on same page

  - by amateur

  Hi, Although this seems like something very basic, but no matter what I tried I couldn't get my head around it. Basically I want a html form where a user types in their ID number in an input text box and when they hit the submit button it displays their email address which is their company ID number @ company.com, such as below <form action=""> ID Number: <input type="text" name="idnumber" /><br/> <input type="submit" value="Whats my email address" /> </form> <p>Your email address is 'idnumber'@email.com</p> Can this even be done using html or would I need to use Javascript or PHP for it? Thanks

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• How to calculate end-point at a given center plus an radius and angle?

  - by mystify

  I'm trying to do some basic quartz core drawing with arcs, but have an F in math ;-) I have a point: CGPoint center = CGPointMake(100.0f, 100.0f); CGFloat radius = 50.0f; CGFloat startAngle = 20.0f / 180.0f * M_PI; CGFloat endAngle = 150.0f / 180.0f * M_PI; CGContextAddArc(c, center.x, center.y, radius, startAngle, endAngle, 0); Now I want to draw a little dot on the middle of the arc. I mean, not the center point, but the little curve (arc) which is made up between the angles 20-150 degrees. I looked into quartz but unfortunately, there seems no helper function to calculate this. Probably some hardcore trigonometric logic with atan and stuff of this kind needed?

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• About a Class Object

  - by Chicko Bueno

  I have a very basic question about a class object. After the class has been created, we need to create a class object. At this point, I'm a bit confused to make either *object or object. Example: CClass object CClass *object What is the difference both of them? And to access class function i need to use dot '.' and arrow '->'. I know dot and arrow used to access class function, but what is the significant meaning for both dot and arrow?

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• What do I need to learn to make a website that can make a text file?

  - by lala

  I want to make a website, but all I know is basic HTML and CSS. On this website, I want the user to input in multiple text fields (sort of like they take a quiz) and then the program will make a text file based on the user input which the user can download. I want it to work backwards, too, so that the text file is the input. What do I need to learn to make a website to do this? Will javascript do the trick? I'm a beginning to intermediate programmer, mainly with java and I've learned some C# recently. I thought I could learn ASP.Net for this, but it turns out my hosting doesn't support it.

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• How is the implicit segment register of a near pointer determined?

  - by Daniel Trebbien

  In section 4.3 of Intel 64® and IA-32 Architectures Software Developer's Manual. Volume 1: Basic Architecture, it says: A near pointer is a 32-bit offset ... within a segment. Near pointers are used for all memory references in a flat memory model or for references in a segmented model where the identity of the segment being accessed is implied. This leads me to wondering: how is the implied segment register determined? I know that (%eip) and displaced (%eip) (e.g. -4(%eip)) addresses use %cs by default, and that (%esp) and displaced (%esp) addresses use %ss, but what about (%eax), (%edx), (%edi), (%ebp) etc., and can the implicit segment register depend also on the instruction that the memory address operand appears in?

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• Function to set an auth_token

  - by john mossel

  In my form I have a hidden field: <input type="hidden" name="auth_token" value="<?php echo $auth_token; ?>"> This value is also stored in a session and a variable: $_SESSION['auth_token'] = hash('sha256', rand() . time() . $_SERVER['HTTP_USER_AGENT']); # TODO: put this in a function $auth_token = $_SESSION['auth_token']; When the form is submitted the two values are compared. It's a basic form token. Should this be made into two functions or just one when refactored? set_form_token() and get_form_token(), get_form_token() returning the session value, then I can compare it in my main code. What is the proper way of doing this?

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• populating word doc from xml in c#

  - by shdu1

  how do i populate a word doc from an xml template using c#. I know how to open a blank document but I cant figure out how to populate it. Word.Document wordDoc = wordApp.Documents.Add(ref objMissing, ref objMissing, ref objMissing, ref objMissing); Word.Paragraph wordParagraph = wordDoc.Paragraphs.Add(ref objMissing); Here's a basic look at my xml form. <?xml version="1.0" encoding="utf-8"?> <Cover> <CaseNo>Case No:</CaseNo> <Title>Title:</Title> <Date>Date:</Date> </Cover> What I eventually want to do is get the user to fill in textboxes in a c# program which will populate the word document. PLEASE HELP ME!!! I've been trying to figure this out for days Note the information is not coming from an sql database

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• Forward traffic between two VLANs.

  - by Michael

  I have a small network with two VLANs. One is our internal network for basic file sharing, etc and the other is a public wifi network for our customers. The internal network is configured as 192.168.1.x and the public wifi is 192.168.11.x. We have one printer at 192.168.1.50. I would like to be able to have that printer available to our customer at 192.168.11.50. I suspect it can be done with iptables, but I'm brand new to it and I just can seem to work out the syntax. Can anyone offer any help? Oh, this is all running on a wrt54g router running Tomato.

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• Error message: "$(window).width is not a function"

  - by Crippletoe

  Hi all, i am trying to use a jQuery scrollbar called "Jscrollhorizontalpane". when i am trying to use it i get the following error message: "$(window).width is not a function" in firebug's console. i am new to jQuery do this might be very basic but still, i dont know what that means and why there is a problem. the scroller comes in a bundle with a few files, one of which is called "jScrollHorizontalPane.js" and i believe it holds the code for the scroller. i tried replacing $ signs there with the word "jQuery" (in case there is a conflict) but it didnt seem to help. also important to add that on the same page i am using another jQuery scroller (a vertical one as opposed to the horizontal on mentioned above) which works just fine and when i examined it's .js file, i could spot lines with "$(window).width". any ideas?

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• How do you push changes to GitHub on OS X 10.6?

  - by dougoftheabaci

  I'm really new to the whole GitHub thing so this might seem like a basic question but I can't figure it out. I have a GitHub repository set up on my machine, I've managed at some point to push the master but now I have made some changes and I want to push the entire thing again (pretty much everything changed). What I'm wondering is: How do you push an entire repository to create a new version (from version 1.0.0 to 1.0.1)? How do you push a single file for more incremental changes?

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