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  • C# Conditional Operator Not a Statement?

    - by abelenky
    I have a simple little code fragment that is frustrating me: HashSet<long> groupUIDs = new HashSet<long>(); groupUIDs.Add(uid)? unique++ : dupes++; At compile time, it generates the error: Only assignment, call, increment, decrement, and new object expressions can be used as a statement HashSet.Add is documented to return a bool, so the ternary (?) operator should work, and this looks like a completely legitimate way to track the number of unique and duplicate items I add to a hash-set. When I reformat it as a if-then-else, it works fine. Can anyone explain the error, and if there is a way to do this as a simple ternary operator?

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  • displaying web pages over web views in collection view using cocoa bindings

    - by Miraaj
    Hi all, I tried sample example given at this link - Collection View Programming Guide It is simple and it worked. Considering it as a reference I tried a simple application which will show a collection view of web views with some web page displayed over each web view. The model class has two properties: NSString *pageName, and NSURL *pageURL. I then followed each and every step written in tutorial above with required modifications but I was caught in the step - How to bind web view to collection view item? In binding tab it shows three possibilities : Editable, Hidden, Tool tip but none of these is working. Can anyone suggest me way to accomplish my requirement? Thanks, Miraaj

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  • Python imaging alternatives

    - by Paul McMillan
    I have python code that needs to do just a couple simple things to photographs: crop, resize, and overlay a watermark. I've used PIL, and the resample/resize results are TERRIBLE. I've used imagemagick, and the interface and commands were designed by packaging a cat in a box, and then repeatedly throwing it down a set of stairs at a keyboard. I'm looking for something which is not PIL or Imagemagick that I can use with python to do simple, high-quality image transformations. For that matter, it doesn't even have to have python bindings if the command line interface is good. Oh, and it needs to be relatively platform agnostic, our production servers are linux, but some of our devs develop on windows. It can't require the installation of a bunch of silly gui code to use as a library, either.

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  • svn merge - moved repository to a different server, and now getting 'has different repository root'

    - by HorusKol
    This is kind of similar to http://stackoverflow.com/questions/1601021/subversion-merge-has-different-repository-root-than - but appears to be a very different cause (especially as the answer for that question didn't resolve my problem). A while back, we swapped out the server where our SVN repositories are located - but we've been using an alias so that the old server name points to the new server. I've been getting in the habit where I will use the new server name wherever I checkout new working copies - but we having made changes to most of the current working copies as they are live websites. Until now, this hasn't been a problem - except that this morning I merged in some changes from my development branch to a working copy I have of the release version and I got the message "file has different repository root" and the merge stops dead. I know this is because I'm using the new server name when the development branch was updated via the old server name - but is there a simple way to fix this? Or if not a simple way - is there a well-documented way to fix this?

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  • Use Google Test from Qt in Windows

    - by Dave
    I have a simple test file, TestMe.cpp: #include <gtest/gtest.h> TEST(MyTest, SomeTest) { EXPECT_EQ(1, 1); } int main(int argc, char **argv) { ::testing::InitGoogleTest(&argc, argv); return RUN_ALL_TESTS(); } I have Google Test built as a static library. (I can provide the makefile if it's relevant.) I can compile TestMe.cpp from a command-line with no problem: g++ TestMe.cpp -IC:\gtest-1.5.0\gtest-1.5.0\include -L../gtest/staticlib -lgtest -o TestMe.exe It runs as expected. However, I cannot get this to compile in Qt. My Qt project file, in the same directory: SOURCES += TestMe.cpp INCLUDEPATH += C:\gtest-1.5.0\gtest-1.5.0\include LIBS += -L../gtest/staticlib -lgtest This results in 17 "unresolved external symbol" errors related to gtest functions. I'm pulling my hair out here, as I'm sure it's something simple. Any ideas?

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  • How to view output .mp files from Functional MetaPost

    - by Jared Updike
    I'm interested in using Functional MetaPost on Mac OS X: http://cryp.to/funcmp/ I'm looking for a tutorial like: http://haskell.org/haskellwiki/Haskell_in_5_steps but for a trivial FuncMP example, i.e. using GHC, I can compile something simple such as: import FMP myPicture = text "blah" main = generate "foo" 1 myPicture but I can't figure out how to view this foo.1.mp output. (It gives a runtime error about not finding 'virmp'; my MetaPost binary is 'mpost'; I can't figure out how to override this Parameter or what my .FunMP file is or should be doing...) I can run mpost on that but the output (foo.1.1) is what, PostScript? EPS? How do I use this? (I imagine I just need a simple LaTeX file with an EPS figure in it or something...) Preferably, I'd like to generate output (.ps or .pdf that I can view) so I an actually get somewhere with Functional MetaPost, learning it, playing with it, not banging my head against paths and binaries and shell commands.

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  • Streaming Flash Video Problem - Clipping

    - by Stanley
    I have a simple flash video player that streams the video from a streaming media server. The stream plays fine and I have no problems with playing the video and doing simple functions. However, my problem is that on a mouse over of the video, I have the controls come up and when I do a seek or scrub on the video, I get little weird boxes that show over the video - like little pockets - of the video playing super fast (you can basically see it seeking) until it gets to the point it needs to be at and then these little boxes disappear. Is anybody else having these problems and if so, how do I fix this? I thought it might be some kind of masking problem, but I haven't been able to figure it out. Please Help!!!

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  • Generating Google Maps markers using Ruby

    - by ischnura
    I would like to do a very simple task: add some markers in a Google Map using a list of addresses from an array. I have been thinking about generating the Google Maps JavaScript API code using ruby (printf) but this does not seem like a very clean and beautiful solution... I have read about YM4R for Ruby on Rails... my project is pretty simple and I have never worked with Ruby on Rails... I have also never used JQuerry... but I am very willing to learn to use this tools :) What do you think will be the best approach to generating the markers?

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  • Creating and Indexing Email Database using SqlCe

    - by Anindya Chatterjee
    I am creating a simple email client program. I am using MS SqlCe as a storage of emails. The database schema for storing the message is as follows: StorageId int IDENTITY NOT NULL PRIMARY KEY, FolderName nvarchar(255) NOT NULL, MessageId nvarchar(3999) NOT NULL, MessageDate datetime NOT NULL, StorageData ntext NULL In the StorageData field I am going to store the MIME message as byte array. But the problem arises when I am going to implement search on the stored messages. I have no idea how I am going to index the messages on top of this schema. Can anyone please help me in suggesting a good but simple schema, so that it will be effective in terms of storage space and search friendliness as well? Regards, Anindya Chatterjee

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  • How do I show a user's credit based on their session

    - by Jamie
    Hi all - I'm developing a simple LAMP app where users can credit their account using Paypal. I suspect this is a simple issue, but have spent quite a while experimenting to no avail and would appreciate any thoughts: System has a user management system working fine using sessions, but I can't get it to display the current user's credit. But I've been trying things along the lines of: $result = mysql_query(" SELECT * FROM users INNER JOIN account ON account.UserID=account.UserID ORDER BY account.accountID"); while($_SESSION['Username'] = $row['Username'] ) { echo $row['Username']; echo $row['Credit']; } I suspect the while statement is invalid, but I want it to echo username and credit where the current session username = the username stored in the database. Thanks so much for taking a look - very much appreciated.

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  • Installing Daemons

    - by Shahmir Javaid
    Dear Stackoverflowers, A simple link would be nice for me to understand how to install my C++ program as a deamon in UNIX, now i know some will say this should be on SERVERFAULT but as far as i understand it i need the init.d shell script to actually create the start and stop for the daemons. But if you guys can show me a simple shell script for the daemon and the file directories every thing required is associated with, that would be great. I was going to do this http://www.linux.com/archive/feed/46892 but if you read the comments every one is moaning x( . P.S. ive already done the required code for C++ to run as a daemon i just need to know how to actually install it as a daemon. At the moment im using crontab which is just not a good idea for the future of my problem. Thanks in advance

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  • Is there a calculator with LaTeX-syntax?

    - by Jørgen Fogh
    When I write math in LaTeX I often need to perform simple arithmetic on numbers in my LaTeX source, like 515.1544 + 454 = ???. I usually copy-paste the LaTeX code into Google to get the result, but I still have to manually change the syntax, e.g. \frac{154,7}{25} - (289 - \frac{1337}{42}) must be changed to 154,7/25 - (289 - 1337/42) It seems trivial to write a program to do this for the most commonly used operations. Is there a calculator which understand this syntax? EDIT: I know that doing this perfectly is impossible (because of the halting problem). Doing it for the simple cases I need is trivial. \frac, \cdot, \sqrt and a few other tags would do the trick. The program could just return an error for cases it does not understand.

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  • Timezones and the DateTimeField - Django

    - by RadiantHex
    Hi folks, I'm trying to implement a "time ago" feature, for the displaying of items on a site. As I'm caching the pages I wish to use javascript in order to render the "time ago". Javascript knows local time and problably the Timezone of the local machine so I could play with that, but that would require to hard code the server's timezone. Therefore I'm trying to figure out a simple way to pass a ISO 8601 timestamp, in GMT time. Is there any simple and straight forward way for doing this? Help would be much appreciated! =)

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  • Are preprocessors obsolete in modern languages?

    - by Earlz
    Hello, I'm making a simple compiler for a simple pet language I'm creating and coming from a C background(though I'm writing it in Ruby) I wondered if a preprocessor is necessary. What do you think? Is a "dumb" preprocessor still necessary in modern languages? Would C#'s conditional compilation capabilities be considered a "preprocessor"? Does every modern language that doesn't include a preprocessor have the utilities necessary to properly replace it? (for instance, the C++ preprocessor is now mostly obsolete(though still depended upon) because of templates.)

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  • MVC in a Google App Engine Java world

    - by thatismatt
    I'm coming to Java from C# & ASP.NET MVC, I'd love to find an equivalent in the Java world that I could use on the Google App Engine. I've already started to have a play with FreeMarker and even made the first steps towards writing a very simple framework. Ideally I wouldn't have to do all the hard work though, someone must have done this already! So my question is - what frameworks are there out there that would be familiar for me coming from ASP.NET MVC and I could use them on Google App Engine for Java. The key things I'd want are: Simple Routing - /products/view/1 gets mapped to the view action of the products controller with the productid of 1 Template Engine - some way of easily passing 'ViewData' to the view, and from the view easily accessing it, ideally I'd love to avoid anything that is too XMLy (thus why I like FreeMarker).

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  • Why are getters prefixed with the word "get"?

    - by Joey
    Generally speaking, creating a fluid API is something that makes all programmers happy; Both for the creators who write the interface, and the consumers who program against it. Looking beyond conventions, why is it that we prefix all our getters with the word "get". Omitting it usually results in a more fluid, easy to read set of instructions, which ultimately leads to happiness (however small or passive). Consider this very simple example. (pseudo code) Conventional: person = new Person("Joey") person.getName().toLower().print() Alternative: person = new Person("Joey") person.name().toLower().print() Of course this only applies to languages where getters/setters are the norm, but is not directed at any specific language. Were these conventions developed around technical limitations (disambiguation), or simply through the pursuit of a more explicit, intentional feeling type of interface, or perhaps this is just a case of trickle a down norm. What are your thoughts? And how would simple changes to these conventions impact your happiness / daily attitudes towards your craft (however minimal). Thanks.

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  • MVVM in a canvas with usercontrols

    - by Mauro Destro
    I have a MVVM WPF application that basically wants to be a single line diagram designer for an electrical distribution network. I have a canvas that must contains transformers, circuit breaker, lines and cables. My big problem is the design... How can i start? I think about a DesignerView, DesignerViewModel that contains an ObservableCollection of IDesignerItemViewModel that is my base class for all the element. But in this case I have to use ItemsControl to bind the content of the canvas to my collection but the pros is that I don't have to create usercontrol for each element but i'll solve most of the problems with DataTemplate (i suppose). Each element viewmodel mantain a link to a model persisted in a repository where i mantain my logical tree. Any hint about how to proceed, I have looked at many DiagramCanvas example but all of those use simple items most like simple rectangle...

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  • How to reflect in the database a new belongs_to and has_many relationship in Ruby on Rails

    - by Ken I.
    I am new to rails (usually a python guy) and have just been trying to build a simple task manager application for fun. I am using Devise for authentication and have a single Task object I am trying to relate to a user. I have added the following to the Task model: class Task < ActiveRecord::Base belongs_to :user end and I have added the following in my User model for Devise: class User < ActiveRecord::Base has_many :dreams <<normal Devise stuff>> end Whenever I added this information I then ran: rake db:migrate. It then gave me an error that the database field did not exist for user_id when I tried to do anything with it. I am sure it is something rather simple that I am missing. Thanks for the help.

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  • Python: Getting INVALID response from PayPal's Sandbox IPN, slowly going insane...

    - by thepeanut
    Hi All I am trying to implement a simple online payment system using PayPal, however I have tried everything I know and am still getting an INVALID response. I know it's nothing too simple, because I get a VERIFIED response when using the IPN simulator. I have tried putting the items into a dict first, I have tried fixing the encoding, and still nothing. PayPal says the reasons for an INVALID response could be: Sending wrong items or in wrong order (pretty sure it's not this) Sending to the wrong address (definitely not this) Encoding items incorrectly (I dont think it's this, set encoding to UTF-8 on both paypal and my script) The following is the snippet concerned: f = cgi.FieldStorage() newparams = 'cmd=_notify-validate' for key in f.keys(): val = f[key].value newparams += '&' + urlencode({key: val.encode('utf-8')}) req = urllib2.Request(PP_URL, newparams) req.add_header("Content-type", "application/x-www-form-urlencoded") http = urllib2.urlopen(req) ret = http.read() fi.write(ret + '\n') if ret == 'VERIFIED': #*do stuff* Can anyone suggest anything I can do to fix this?! Cheers Sam

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  • How do you test your blackberry application on the device?

    - by Kai
    This may sound very noobish, but I can't seem to get my app to my blackberry. I was trying to follow the beginning blackberry development book's guide, but maybe I just missed the point somewhere. For remote download, Is it really as simple as drop the COD and JAD files in the same folder on your server then just navigate to the URL with your device's browser? The book says it should prompt a download screen, but all I get is a page full of cryptic characters. My app is a simple slideshow. Uses no signed things and is not MDS enabled. Did I forget something? Any help would be appreciated. Thanks

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