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  • How to make a Scala Applet whose Applet class is a singleton?

    - by Jamie
    Hi, I don't know if a solution exists but it would be highly desirable. I'm making a Scala Applet, and I want the main Applet class to be a singleton so it can be accessed elsewhere in the applet, sort of like: object App extends Applet { def init { // do init here } } Instead I have to make the App class a normal instantiatable class otherwise it complains because the contructor is private. So the ugly hack I have is to go: object A { var pp: App = null } class App extends Applet { A.pp = this def init { // do init here } } I really hate this, and is one of the reasons I don't like making applets in Scala right now. Any better solution? It would be nice...

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  • how to select database content foreach month ?

    - by mehdi
    i have table named visits in my database like this : id ip action_date|time_stamp i use this code to store site visits /* Hits table has an auto-incrementing id and an ip field */ // Grab client IP $ip = $this->input->ip_address(); // Check for previous visits $query = $this->db->get_where('visits', array('ip' => $ip), 1, 0); $query = $query->row_array(); if (count($query) < 1 ) { // Never visited - add $this->db->insert('visits', array('ip' => $ip) ); } it's working nice . but my client need to know how many visits they have in month . how can i do that ? tanks .

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  • How to update Eclipse from 3.4 (Ganymede) to 3.5 (Galileo)?

    - by Vilx-
    I've got my Eclipse 3.4 envirnoment set up nice and cozy the way I like it. Took me some time too, to find all the plugins (Mylin, PDT, Subclipse), set all the settings, etc. Now I see that some of the plugins (like PDT) only support 3.5 in their latest versions. Is it possible to update from 3.4 to 3.5? I'd hate to do it all again. I read in some mailing list where they noted that it's possible, but the conversation trailed off in another direction. Google wasn't much help, and Eclipse's documentation either.

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  • Is there simple way to play an rtp video/audio stream in WPF?

    - by Robin
    I need to create a WPF control that will play an rtp stream with the requirement that the latency needs to be as low as possible. I've looked at the following two projects: http://vlcdotnet.codeplex.com/ http://wpfmediakit.codeplex.com/ As far as I know, I can't use VLC because we're shipping a commercial application with a more restrictive license than GPL (i.e. we can't ship our source). Wpf media kit is nice, but I can't seem to find a good/free rtp directshow source filter and I wanted to ask if there is a simpler solution out there that I'm missing before I jump into writing my own. Any ideas?

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  • Commenting out protect_from_forgery

    - by Andy
    Hi, I was trying to use active record store but I kept getting an invalid authenticity token. Someone told me to remove my protect_from_forgery from application controller. I know that this would remove all auth tokens but I'm not sure if this is a good idea. Does active record store not need auth tokens? By the way, all I need is a way to dynamically calculate the number of users online and their session variables. If there is a better way than using active record store it would be nice to know.

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  • Managing projects with cousin: How Projectlocker.com can help?

    - by mbadawi23
    I'm about to go through a new experience with my cousin who is also a software engineer. We have few ideas that we like to turn into software applications. We are currently collaborating via email to record our ideas and thoughts. But to manage our little project and control source code and track our issues. Now my question is: How can I make use of the wiki and blog feature so that we don't have to write emails? It is nice to be able to document our work in a formating friendly environment.

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  • Refactoring tools for namespaces and physical project structure

    - by simendsjo
    When I hack around, some code tend to get much bigger than originally planned. As this happens I usually introduce/collapse/merge namespaces, move files between them, move folders etc etc. Sometimes, if I don't have a clear picture of the end result, this is a real pain and really easy to just "skip". This leads the project deteriorate where classes belong elsewhere, strange namespaces, no folders/wrong folders etc. And then I usually cannot take it anymore and do a larger cleanup - which is usually not difficult, just very tedious and it feels nice to do everything at once, so I do a code freeze while finishing up. So my question is... Are there any tools to help refactoring the namespace/physical aspects of a project?

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  • Zend_Form and Liskov Substitution Principle

    - by blockhead
    A very common pattern I see (I'm picking on Zend Framework, only because I was dealing with it at the moment of this question), is something like this: class My_Form extends Zend_Form { public function init() { $this->addElement(); } } Zend_Form is not an abstract class, but is perfectly usable on its own. This seems to be "recommended" as place to "encapsulate" your forms into a nice class. Does this violate the Liskov Substitution Principle? Each subclass of Zend_Form will have a wildy different behavior than the base class. Would it be better to use composition for this, or am I totally misunderstanding this principle?

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  • java best way to transfer images

    - by d.raev
    I have a application that reads a PDF, transform the content to collection of TIF files, and send them to Glass Fish Server for saving. Usually there are 1-5 pages and it works nice, but when I got a input file with 100+ pages... it throws error on the transfer. Java heap space at java.util.Arrays.copyOf(Arrays.java:2786) at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:94) Putting more resources is not a good option in my case, so I m looking for a way to optimize it somehow. I store the data in: HashMap<TifProfile, List<byte[]> Is there a better way to store or send them ? EDIT I did some tests and the final collections for PDF with 80 pages has size over 280mb (240 tiffs with different settings inside)

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  • Displaying full path of filename in tabs ~ Netbeans 6.8

    - by DavidYell
    I can't seem to find a way in the options to display the full path of the file at the title of the tab. I can hover over it to see it, but it would be nice to see it at a glance. There is a SU question about it also, http://superuser.com/questions/88637/netbeans-how-to-view-file-full-path-in-window-title-or-somewhere-else Does anyone have a solution for this to actually display it? I can see there is a custom .jar for it in the RC2 Netbeans, but that's probably way old now. PS, I should mention that a path relative to the project would be ideal, as well as a full path. Either really :)

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  • a small question on GNUPlot

    - by Robert
    Dear Guys, I have used the following statement to get the GNUPlot plot a grah for me: plot "force.dat" using 1:2 title "Detroit" with lines, \ "force.dat" u 1:3 t "US Avergae" w linepoints and the "force.dat" looks like 2005 0 0 2006 104 51 2007 202 101 It draws nice graph for me.However,I don't like the X-axis,because it is labelled as 2005,2005.5,2006,2006.5,2007..etc. However,those are year identifiers,I only want the 2005,2006,2007 etc,how could I get rid of the 2005.5,2006.5 etc labels in my GNUPlot graph? Thank you very much for your ideas.

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  • Binding Navigation Property with Entity Framework

    - by JSmaga
    Hi, I have another question about binding using C# and the entity framework. Here, I'm looking to bind a navigation property to a listbox or a listview. I saw on different posts that if I update the collection using code behind the list would not be notified because the collection does not handle notification (it's always the same problem anyway). People suggested to use an ObservableCollection for example, but, and here is my question, this comes down to basically duplicate the collection and hence, if I modify it, I'd have to handle in code-behind the fact that the change has also to be applied to the "original" navigation property right? If that's the case, I was thinking: why not create a custom property called, say, MyObservableNavigationProperty in a partial class. I could then interact only with this collection, catch the event when the collection is changed and apply the change to the "original" collection. Is that a nice way to do the trick? or am I getting all confused here....

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  • Should we use a CSS frame work ? Are they worth it ?

    - by Gaurav M
    CSS frameworks have nice styles inbuilt and ask you to focuses on the grids but still there is a bit of dependency and lack of freedom it provide.. If I need to generate a webpage by looking on a PSD based mockup screen ..either i will use the classes provided by the framework but if that actual measurements does not exist I need to again specify my own rules that will add upto my CSS filesize and if performance is a constraint as always it is...you need not a big size file..though its in kb but every drop counts. Any comments and suggestions to use the framework in a best possible way.

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  • Retrieving Spotlight query used to open document in application

    - by vicvicvic
    If you search for something that opens Preview.app (e.g. a PDF file) in Spotlight, the application not only opens the file but actually copies the Spotlight query into the application's search field (for deeper search). iPhoto and Mail.app also do this. This is a really nice feature. Unfortunately, Apple does not document how it's implemented. Opening a document from Spotlight appears to simply send application:openFile to the application delegate. Is it possible to retrieve the user's Spotlight query somehow? Or is this a hardcoded feature of Spotlight?

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  • compute mean in python for a generator

    - by nmaxwell
    Hi, I'm doing some statistics work, I have a (large) collection of random numbers to compute the mean of, I'd like to work with generators, because I just need to compute the mean, so I don't need to store the numbers. The problem is that numpy.mean breaks if you pass it a generator. I can write a simple function to do what I want, but I'm wondering if there's a proper, built-in way to do this? It would be nice if I could say "sum(values)/len(values)", but len doesn't work for genetators, and sum already consumed values. here's an example: import numpy def my_mean(values): n = 0 Sum = 0.0 try: while True: Sum += next(values) n += 1 except StopIteration: pass return float(Sum)/n X = [k for k in range(1,7)] Y = (k for k in range(1,7)) print numpy.mean(X) print my_mean(Y) these both give the same, correct, answer, buy my_mean doesn't work for lists, and numpy.mean doesn't work for generators. I really like the idea of working with generators, but details like this seem to spoil things. thanks for any help -nick

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  • Eliminate subquery for average numeric value

    - by Dave Jarvis
    Quest A query selects locations that begin with Vancouver, which are in a 5 minute radius from one another. SQL Code The following SQL abomination does the trick: SELECT NAME FROM STATION WHERE DISTRICT_ID = '110' AND NAME LIKE 'Vancouver%' AND LATITUDE BETWEEN (SELECT round((min(LATITUDE) + max(LATITUDE)) / 2)-5 FROM STATION WHERE DISTRICT_ID = '110' AND NAME LIKE 'Vancouver%') and (SELECT round((min(LATITUDE) + max(LATITUDE)) / 2)+5 FROM STATION WHERE DISTRICT_ID = '110' AND NAME LIKE 'Vancouver%') AND LONGITUDE BETWEEN (SELECT round((min(LONGITUDE) + max(LONGITUDE)) / 2)-5 FROM STATION WHERE DISTRICT_ID = '110' AND NAME LIKE 'Vancouver%') and (SELECT round((min(LONGITUDE) + max(LONGITUDE)) / 2)+5 FROM STATION WHERE DISTRICT_ID = '110' AND NAME LIKE 'Vancouver%') ORDER BY LATITUDE Question How can this query be simplified to remove the redundancy, without using a view? Restrictions The database is MySQL, but ANSI SQL is always nice. Thank you!

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  • How Does Differential Execution Work?

    - by Brian
    I've seen a few mentions of this on SO, but staring at Wikipedia and at an MFC dynamic dialog demo did nothing to enlighten me. Can someone please explain this? Learning a fundamentally different concept sounds nice. Edit: I think I'm getting a better feel for it. I guess I just didn't look at the source code carefully enough the first time. I have mixed feelings about DE at this point. On the one hand, it can make certain tasks considerably easier. On the other hand, getting it up and running (i.e. setting it up in your language of choice) is not easy (I'm sure it would be if I understood it better)...though I guess the toolbox for it need only be made once, then expanded as necessary. I think in order to really understand it, I'll probably need to try implimenting it in another language.

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  • How does PHP's list function work?

    - by Jacob Relkin
    After recently answering a couple of questions here on SO that involved utilizing PHP's list function, I wondered, "how in the world does that function actually work under the hood?". I was thinking about something like using func_get_args() and then iterating through the argument list, and that's all nice and peachy, but then how in the world does the assignment part work? list(...) = array($x, $y, $z); isn't this ^ evaluated first? So to be precise, my question is how is the list function able to create scoped variables which get assigned to the not-yet evaluated array?

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  • Bitmap manipulation in C++ on Windows

    - by Oliver
    Hi, I have myself a handle to a bitmap, in C++, on Windows: HBITMAP hBitmap; On this image I want to do some Image Recognition, pattern analysis, that sort of thing. In my studies at University, I have done this in Matlab, it is quite easy to get at the individual pixels based on their position, but I have no idea how to do this in C++ under Windows - I haven't really been able to understand what I have read so far. I have seen some references to a nice looking Bitmap class that lets you setPixel() and getPixel() and that sort of thing, but I think this is with .net . How should I go about turning my HBITMAP into something I can play with easily? I need to be able to get at the RGBA information. Are there libraries that allow me to work with the data without having to learn about DCs and BitBlt and that sort of thing?

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  • Easier way to move a project in Eclipse

    - by myplacedk
    My projects changes location, and I need to tell Eclipse this. Today I just delete the project and import it from the new location. But I have a lot of projects, they change location often and the paths a very complicated. I'd like a better way to manage this in Eclipse. For example: J:\iteration234_abc\foo\bar\baz\iffle\dizzle\Project Only the root-folder changes (iteration-number and the idenfier "abc"). After that there are lot of folders. Many folders has tons of subfolders with similar names, which makes finding the folder with GUI time-consuming and very boring. It would be so nice if I could just edit the path. As you may have guessed: The J-drive is a network drive, provided by the source control system. The way to tell source control that I'm working on another itertion, is to continue my work in a different folder. My actual Eclipse workspace normally doesn't contain any projects.

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  • boolean type for while loop in bash?

    - by user151841
    I have a cron script on a shared web host that occasionally gets killed. I'd like to make a loop in bash that tries again if it gets killed, because most of the time it will make it. I'm having trouble with the syntax for storing a boolean value :P #!/bin/bash VAR=0; while [ $VAR ]; do if nice -19 mysqldump -uuser -ppassword -h database.hostname.com --skip-opt --all --complete-insert --add-drop-table database_name > ~/file/system/path/filename.sql; then VAR=1; fi done So the script recovers from a killed process okay, but once it's run properly, the new VAR value doesn't kill the while loop. What am I doing wrong?

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  • jQuery Tools - Range Input with Mousewheel support

    - by pspahn
    I've got a nice looking horizontal scroller that uses the Range Input feature of jQ Tools. Mouse wheel scrolling support would be awesome, and I'm sure it can work, just not sure how to get it set up. I've got the generic setup: var scroll = jQuery('#scroll'); jQuery(':range').rangeinput({ speed: 0, progress: true, onSlide: function(ev, step) { scroll.css({left: -step}); }, change: function(e, i) { scroll.animate({left: -i}, "fast"); } }); The doc page ( http://jquerytools.org/documentation/toolbox/mousewheel.html ) for mousewheel gives an example: $("#myelement").mousewheel(function(event, delta) { }); But I'm not sure how this hooks in. Other tools in the package simply allow the option: mousewheel: true Unfortunately that doesn't work on range input. Any advice appreciated. Thank you.

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  • Is Python a beginner language or is it robust?

    - by orokusaki
    I am already working on some software in Python but I'm having one of those days where I step back and reflect just to make sure I'm not spinning my wheels. I know that Twitter launched with RoR because it was fast to build. Then they almost moved into another language in 2008 because of scalability issues. This has caused me to step back and introspect for a moment to make sure I'm heading down the right path. I've read in some tutorials and other places that Python is "a great first language" or a "nice beginner language" as though it's not capable of larger tasks. I look at it as Python can do what Java or ASP can but with about 1/4th of the code, not to mention I don't have to build or compile, etc. I've read that Java runs quite a few times faster than Python which is important of course, but then I read everywhere that hardware keeps getting cheaper and there are projects like Unladen Swallow by Google to make Python faster. Should I be concerned or is this just the remnants of Java developers?

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  • Preprocess strings file during Xcode build

    - by stigi
    Hello, I know there's a way to preprocess my info.plist file, but is there a similar way to process strings files inside my Settings.bundle? My problem: I have an iPhone app and I want the the user to know about the currently installed version. I do this by displaying it in the apps settings. Now every time i change the bundle version in my info.plist i also have to change the version in the Root.strings in the Settings.bundle. I could run a script action that updates it, but it would be nice to use the preprocessor since I could do even more fun things with it. Thanks!

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  • Antialiased fonts in emacs 23.2 on Windows

    - by Damyan
    I'm having trouble getting antialiased fonts to work correct in emacs 23.2, to the extent that it appears that it doesn't actually support antialised fonts. If I do the following in emacs 23.1: (set-face-font 'default "DejaVu Sans Mono-9.0:antialias=subpixel") (describe-font nil) Then this reports the full name as "DejaVu Sans Mono-9.0:antialias=subpixel", and the font looks nice and smooth. However, doing the same thing in emacs 23.2 gives the full name as "DejaVu Sans Mono-9.0" and the font looks nasty and chunky. Is there something I'm doing wrong?

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