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  • Pointer to another classs as a property

    - by arjacsoh
    Why I receive an error when I try to create a property to another class through a pointer like that: #ifndef SQUARE_H #define SQUARE_H #include <string> //using namespace std; #include "Player.h" class Square { public: Square(int); void process(); protected: int ID; Player* PlayerOn; <--- }; #endif and the Player class is : #ifndef PLAYER_H #define PLAYER_H #include <string> //using namespace std; #include "Square.h" class Player { public: Player(int,int); // ~Player(void); int playDice(); private: int ID; int money; }; #endif I receive: syntax error missing ; before * (on the declaration of Player* PlayerOn;) and missing type specifier (on the same line...)

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  • Use TinyInt to hide/show controls?

    - by grady
    Hi, I have 6 buttons on my GUI. The visibility of the buttons can be configured via checkboxes. Checking the checkbox and saving means the correpsonding button should be shown. I am wondering if it is somehow possible to have one TinyInt column in the database which represents the visibility of all 6 buttons. I created an enum for the buttons, it looks like that: public enum MyButtons { Button1 = 1, Button2 = 2, Button3 = 3, Button4 = 4, Button5 = 5, Button6 = 6 } Now I am wondering how to say that for example only button1, button5 and button6 are checked using this one column. Possible at all? Thanks :-)

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  • How to resize pdf graphics produced in R using Illustrator

    - by user1648516
    I am making plots in R using the pdf() command. Graphs look perfect and resize nicely in Acrobat Reader. My usual workflow includes manipulating labels etc. in Illustrator, saving as .eps for submission to publishers or inserting in Word. All works fine for single graphs. Now I am trying to combine 4 graphs into one by manually putting them together in an A4 Illustrator document. However, when I resize the standard 7x7 inches pdf graph in Illustrator to fit in one column of an A4 page (ca 3.4 inches wide), all proportions get screwed up, e.g. lines and symbols outlines become way too thick. Using pdf(..., width=3.4, height=3.4) in R messes up all the symbol and font sizes so carefully chosen to produce the original graph. Why can't I resize the graph within Illustrator the same way I can resize the pdf e.g. in Acrobat Reader?

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  • Cluster of computers for rent?

    - by R S
    I am doing a project in the university which requires running of multiple instances (1000s) of a program I've written (in C++), which runs for quite a while (say 2 hours). The program is very self contained - it does not require input files, and the only dependency I think is boost. I'm currently using the university-owned cluster of computer. However, it's quite old and the jobs dispatching and monitors services are pretty bad. So I was wondering whether I can run my jobs elsewhere, for some money. For example, I looked a bit into Google App Engine, but as it seems every job must end after 30 seconds it is not suitable for me. Maybe Amazon EC2? Do you know of such options?

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  • Paypal API for preapproved payments , is the merchant charged for pre-approved transactions ?

    - by Michael
    I'm running an classified ads website and I'm charging a specific fee for each ad placed. As you may know paypal charges a specific percent for each transaction + a specific amount fee (e.g 2,9% + 0.30 cents) . I have customers who place about 30 ads per month therefore I would like to integrate a schema that would cut the specific amount fee . Basically I'm looking to make "pre-approve" call every time after the client place an ad to make sure that he has the money to pay and at the end of the month to cancel all the scheduled pre-approved transactions and make a single payment request with the whole amount. The question that I have is : Will I be charged for the pre-approved transactions that I cancel ?

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  • How can I delete video stored in the photo library ?

    - by srikanth rongali
    I have saved video in to the photo library. -(void)exportVideo:(id)sender { NSString *path = [DOCUMENTS_FOLDER stringByAppendingString:@"/air.mp4"]; NSLog(@"Path:%@", path); NSLog(@"Export Button CLicked"); UISaveVideoAtPathToSavedPhotosAlbum(path, self, @selector(video:didFinishSavingWithError: contextInfo:), nil); } - (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo { NSLog(@"Finished saving video with error: %@", error); } Now I need to delete the video i have stored programmatically. How can I delete the video ? Are there any functions for it? Thank You.

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  • Fluent NHibernate CheckProperty and Dates

    - by Chris C
    I setup a NUnit test as such: new PersistenceSpecification<MyTable>(_session) .CheckProperty(c => c.ActionDate, DateTime.Now); When I run the test via NUnit I get the following error: SomeNamespace.MapTest: System.ApplicationException : Expected '2/23/2010 11:08:38 AM' but got '2/23/2010 11:08:38 AM' for Property 'ActionDate' The ActionDate field is a datetime field in a SQL 2008 database. I use Auto Mapping and declare the ActionDate as a DateTime property in C#. If I change the test to use DateTime.Today the tests pass. My question is why is the test failing with DateTime.Now? Is NHibernate losing some precision when saving the date to the database and if so how do prevent the lose? Thank you.

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  • Cannot commit in sqlite using a wrapper

    - by user271753
    - (IBAction)SetupButtonPressed:(id)sender { Sqlite *sqlite = [[Sqlite alloc] init]; NSString *writableDBPath = [[NSBundle mainBundle]pathForResource:@"Money"ofType:@"sqlite"]; if (![sqlite open:writableDBPath]) return; [sqlite executeNonQuery:@"CREATE TABLE test (key TEXT NOT NULL, num INTEGER, value TEXT);"]; } Hey guys the above code runs at first but the next time , the table does not exists in the database ! I am using http://th30z.netsons.org/2008/11/objective-c-sqlite-wrapper/ what am I doing wrong ? Or could you please suggest me a really simple tutorial for core data ?

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  • Design question?

    - by Mohamed
    I am building music app, where user can do several tasks including but not limited to listening song, like song, recommend song to a friend and extra. currently I have this model: class Activity(models.Model): activity = models.TextField() user = models.ForeignKey(User) date = models.DateTimeField(auto_now=True) so far I thought about two solutions. 1. saving a string to database. e.g "you listened song xyz" 2. create a dictionary about the activity and save to the database using pickle or json. e.g. dict_ = {"activity_type":"listening", "song":song_obj} I am leaning to the second implementation, but not quite sure. so what do you think about those two methods? do you know better way to achieve the goal?

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  • Best way to do TDD in express versions of visual studio(eg VB Express)

    - by Nathan W
    I have been looking in to doing some test driven development for one of the applications that I'm currently writing(OLE wrapper for an OLE object). The only problem is that I am using the express versions of Visual Studio(for now), at the moment I am using VB express but sometimes I use C# express. Is it possible to do TDD in the express versions? If so what are the bast was to go about it? Cheers. EDIT. By the looks of things I will have to buy the full visual studio so that I can do integrated TDD, hopefully there is money in the budget to buy a copy :). For now I think I will use Nunit like everyone is saying.

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  • Dynamic proxies to auto-save models

    - by atomman
    I'm trying to make some auto-magic happen in java using proxies to track objects and saving them when a set* method is called. I started of using java's built in Proxy, and everything works just fine, but from what I can understand I need a interface for every model, which is something that I'm trying to avoid. This is where CGLIB comes in, it allows me to create proxies of my models without the use of interfaces. BUT, how can I now retrieve the original object, the one I am trying to save? The optimal solution to be would be something like the EntityManager interface used by hibernate, where you keep your original object, but it is still tracked.

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  • which technology is best for a Facebook application Ruby on Rails or C# and ASP?

    - by Johnny
    hi, My friend and I want to write a Facebook application. We've narrowed down the list of possible technologies to Ruby on Rails and C# with ASP. Here are the pros and cons we've thought of. Cons: ASP - proprietary tools like Visual Studio etc. cost (lots of) money. We both don't know ASP (although we're not bad at C#). RoR - It's scripting so might be harder to maintain. My friend doesn't know RoR at all (but he's a fairly proficient programmer so will probably be able to pick it up quickly). Pros: ASP - Facebook has an official SDK for .NET. RoR - I know RoR. It's open source, free and has fast development time. What says the community? Is there something we haven't thought of?

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  • With PHP and AJAX, Can two clients inter-exchange data without MySQL?

    - by Devyn
    Hi, Let's assume I'm developing a AJAX, PHP chess game. During the game, one movement of a player will be notified to the another but we are not saving that information. Normally, we used to store in MySQL every time a player makes movement and show update position to another player. What I want is to reduce MySQL load as much as possible and server is not interested in movements between two players. Server will only save final result like who wins. So what should I do?

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  • Creating an Application to Save Arbitrary Application State

    - by ashes999
    See this SuperUser question. To summarize, VM software lets you save state of arbitrary applications (by saving the whole VM image). Would it be possible to write some software for Windows that allows you to save and reload arbitrary application state? If so (and presumably so), what would it entail? I would be looking to implement this, if possible, in a high-level language like C#. I presume if I used something else, I would need to dump memory registers (or maybe dump the entire application memory block) to a file somewhere and load it back somewhere to refresh state. So how do I build this thing?

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  • VB.net save opened word document!

    - by comii
    Hi! I just trying to made word add-ins that gone save opened document.I made ribbon and button on it.Below is the that i use for saving word document on certain location: Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As Microsoft.Office.Tools.Ribbon.RibbonControlEventArgs) Handles Button1.Click Dim ThisApplication As Word.Application ThisApplication.ActiveDocument.SaveAs("C:\email") ThisApplication.Quit() ThisApplication= Nothing End Sub But when i click on this button i just made email.doc but that document does not contain any content of the opened document, it just made new doc file. What i am doing wrong? The event on this button need to just same as event on standard Word save button, so how i can do this?

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  • All things equal what is the fastest way to output data to disk in C++?

    - by user260197
    I am running simulation code that is largely bound by CPU speed. I am not interested in pushing data in/out to a user interface, simply saving it to disk as it is computed. What would be the fastest solution that would reduce overhead? iostreams? printf? I have previously read that printf is faster. Will this depend on my code and is it impossible to get an answer without profiling? Edit: Output data needs to be in text format, whether tab or comma separated. This will require formatting, precision, etc. Running in Windows.

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  • Entity Framework 5 not updating navigation properties in both entities

    - by Taylor
    I have updated a project to use the new Entity framework shipped with VS2012, however I have run into some of my code throwing exceptions. In the VS10 version of EF I was able to create or modify and Entity and use its navigation properties before calling SaveChanges() For example: A Navigation property of a client having a collection of Invoices. Client c = new Client(); Invoice I = new Invoice(); c.Invoices.Add(I); I would then be able to use Invoice.Client somewhere in my code before actually saving it without issue. Now Invoice.Client == null. Similarly in setting I.Client = C, I does not show up under C.Invoices What am I missing here or is this just simply how EF5 is?

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  • Get information from various sources

    - by Francesc
    Hi. I'm developing an app that has to get some information from various sources (APIs and RSS) and display it to the user in near real-time. What's the best way to get it: 1.Have a cron job to update them all accounts every 12h, and when a user is requesting one, update that account, save it to the DB and show it to the user? 2.Have a cron job to update them all accounts every 6h, and when a user is requesting one, update the account and showing it to the user without saving it to the DB? What's the best way to get it? What's faster? And what's the most scallable?

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  • How to load mht from stream/string into a WebBrowser control?

    - by Sameh Serag
    The WebBrowser control loads properly any mht file if I use the Navigate method, but when I use the DocumentText or DocumentStream properties, the source of the mht file is displayed as if I opened the file in notepad. If I write the stream to a temp file then Navigate to it, it works properly, but I don't want to do it this way. This issue seems common, but I didn't find a working solution for it. Some people suggest I should fool IE by implementing IPersistMoniker com interface, ...etc. I have tried with this a little bit, but unfortunately I got the same result. May be I have done something wrong. I still feel their should be a more straightforward solution (other than saving in a temp file first), any idea?

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  • MVC way of handling data input

    - by korki
    I have a data input module where I add the information of my product and its sub information like: product basic info product price info product price details price info and price details are related to product and are lists In my web forms approach I would store my main product object on the view state and I would populate it's pricing info and details while doing ajax postbacks. This way I can create a compact module that is very user friendly in terms of defining a lot of data from one place without the need to enter these data from seperate modules. And when I am done I would do one product.save() and that would persist all the data to the respective tables on db. Now I am building similar app on .net mvc framework and pondering on what would be the good way of handling this on mvc. I don't resonate towards storing all this on client side till I click save. And saving to the db after each action makes me remember the days I was coding on asp. Will appreciate your inputs on ways to approach this on mvc framework

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  • Magento product name

    - by Kudja
    I wish to change product name when someone adding this product to cart. All product are simple. Magento v. 1.7.0.0 If I try to change it's name in Mage_Checkout_Model_Cart - addProduct method in that way for example: if ($request->getMyParam()) { $product->setName($product->getName() . ' (' . $request->getMyParam() . ')'); } than I have message that I added product with MyParam but in cart really I have simple product name from catalog The same thing happent when I trying to do same thing in Mage_Sales_Model_Quote - addProductAdvanced method So where I must change this name to save this name in cart and then in order details too. Or maybe I can create some additional custom options on he fly when I adding to cart or saving product. Thnx for all who can help with this

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  • Can't add libraries to Eclipse Android project

    - by neuromancer
    I'm trying to get the Hackbook for Android project to work in Eclipse. One of the things I need to do is remove that invalid reference and include that project I made. I did this before, but then I started over and now it doesn't work. Here is where I add the project. If I click "Apply" and then "OK" everything seems to be fine, but it isn't, because when I go back to this screen, none of the changes I made are there. Why isn't it saving my changes? How am I supposed to do this?

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  • What Programming Book would you NOT recommend to Developers?

    - by Ender
    Like a lot of people on Stack Overflow I love to read books about programming, almost as much as I love to read the lists that people add onto their websites, Blog's and this very website. However, for every gem there are a thousand turds, and to one developer a gem could just be a shiny turd to another. Whilst there are hundreds of book questions on this website asking users to recommend books that they have loved I have decided (after looking for a similar question and not finding it) to create a list of books that users have detested. After all, if we're going to fork out money for these books it'd be a good idea to get both positive and negative aspects out there. Please refer to a specific book, and with it add an image of either the latest version or the version you have read. Also, if you have the time please comment on the answers to provide your experiences with the books.

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  • Custom Rails Validation (Doesn't seem to be working)

    - by Karl Entwistle
    Hey guys ive got the following Model for Accounts require 'net/http' require 'uri' require 'date' class Account < ActiveRecord::Base validates_presence_of :username, :password, :on => :update validate :valid_expiry_date, :on => :update def valid_expiry_date reply = Net::HTTP.get URI.parse("http://api.rapidshare.com/cgi-bin/rsapi.cgi?sub=getaccountdetails_v1&type=prem&login=" + username + "&password=" + password) account = Time.at(reply[80..90].to_i) if (Time.now + 2419200) <= account return true else return false errors.add_to_base("Sorry this account isnt valid") end end end I know the code works in a ruby.rb file and will return true or false, however I seem to be having rather a lot of difficultly trying to translate this code into an actual validation, any help would be much appreciated. Thanks :) Its also defiantly at least connecting to the website as my firewall asked me if the Terminal was aloud to access it. At the moment not only is it displaying no errors its actually letting anything through and saving it.

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  • displaying the different uploaded files as thumbnails or any other way

    - by user1529342
    I have written code to upload the files of different types using php, and also i am saving their location information and date in database table. i made a query to display list of files i have uploaded...and resulting output on a html page as follows 1.uploads/clouds.png date and time 2.uploads/resume.pdf dare and time .......so on is there any different any way to display them by their file types as like an operating systems do..... or any better way.... I am curious to know it... Thanks for any help...

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