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  • How can an amateur programmer become professional without formal education (college) outside the US

    - by AlexRednic
    What is the path? Do I get certified (Microsoft,Sun,etc)? How do I build reputation? How do I make myself valuable without a college degree? How do I make others recognize my value? These are just a few questions but all point in the same direction. Are any of you in the same situation? What paths did you follow to become a successful programmer without the need of formal education?

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  • python variable scope

    - by Oscar Reyes
    I'm teaching my self python and I was translating some sample class Student: def __init__( self, name, a,b,c ): self.name = name self.a = a self.b = b self.c = c def average(self): return ( a+b+c ) / 3.0 Which is pretty much my intended class definition Later in the main method I create an instance and call it a if __name__ == "__main__" : a = Student( "Oscar", 10, 10, 10 ) That's how I find out that the variable a declared in main is available to the method average and that to make that method work , I have to type self.a + self.b + self.c instead What's the rationale of this? I found related questions, but I don't really know if they are about the same

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  • ASP.NET MVC How to convert ModelState errors to json

    - by JK
    How do you get a list of all ModelState error messages? I found this code to get all the keys: ( http://stackoverflow.com/questions/888521/returning-a-list-of-keys-with-modelstate-errors) var errorKeys = (from item in ModelState where item.Value.Errors.Any() select item.Key).ToList(); But how would I get the error messages as a IList or IQueryable? I could go: foreach (var key in errorKeys) { string msg = ModelState[error].Errors[0].ErrorMessage; errorList.Add(msg); } But thats doing it manually - surely there is a way to do it using LINQ? The .ErrorMessage property is so far down the chain that I don't know how to write the LINQ...

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  • Am i passing values or adresses? [Java]

    - by Samuel
    Hello World, I am new to java and i was asking myself, if i have a class 'Example' and somewhere i make a: Example example1 = new Example(); and i add some stuff to it, lets say example1.setExampleBoolean(false); and now i make: Example example2 = example1; example2.setExampleBoolean(true); Did i say with Example example2 = example1 let example2 point to the same adress as example1? Because than i would have altered example1. In other words would, using something like: Boolean exampleBoolean = example1.getExampleBoolean(); exampleBoolean be true of false? Might be a stupid questions but for me it would change the way i'd handle problems in my programs :) Thanks in advance -Samuel

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  • TTPhotoViewController: Images not loading until swipe

    - by Raj
    Hi, I am trying to implement TTPhotoViewController in a sample iPad application. I have implemented properly TTPhotoSource and TTPhoto protocols. The TTPhotoViewController does show image, but not until swiped. The right and left button in the tab bar below doesnt seem to work at all, they never change the image displayed. The UIActivityIndicatorView is never put up, nor the right and left buttons are validated when last or first images are reached. I am initializing the subclass of TTPhotoViewController as a rootViewController of a UINavigationController object which I am adding it onto a view. This rules out the possibility of the problem faced here: http://three20.stackexchange.com/questions/78/ttphotoviewcontroller-not-loading-images-immediately What else am I missing? Anybody faced similar problems and found a way around? Thanks, Raj

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  • CSS rules help - layout and menu

    - by NachoF
    Im trying to use this template for a webapp Im making (I really suck at css so I have to use templates). I have two questions with it... I deleted all of the content of the "#content" div and added my own content... the problem is that since its not as long as the original content the header comes up and is now on top of the sidebars....how can I make the header stay on the bottom of the page?? My second question is, what would be the easiest way to add sidebar subitems that slide-right on hover...?? Thanks in advance

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  • Do Precompiled headers help with rebuilds?

    - by brickner
    I read some of the questions about precompiled headers but couldn't find a direct answer to that. I usually rebuild my entire Visual Studio 2010 solution. One of the projects in my solution is a C++/CLI project. I thought that using precompiled headers in that project will increase the speed of the compilation. After some experiments, it seems that using precompiled headers only slows the rebuild process. Do precompiled headers only help with builds that didn't completely clean the old files?

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  • django __search - trying to do x+y__search

    - by ckohrman
    I'm trying to do something like this with django: Q(x+y__search = z) I'm using __search to boolean search for a list of words within two separate lists (requiredTags, preferredTags). Line 10 is the one I have questions about. I want to see if the list of words (requTags) is found among requiredTags or preferredTags. requTags="" prefeTags="" for i in reqTags: if(i!=""): requTags+="+"+i+" " for i in prefTags: if(i!=""): prefeTags+=i+" " if(requTags!=""): query=query &( Q(requiredTags__search + preferredTags__search = requTags)) if(prefeTags!=""): query=query &( Q(requiredTags__search = prefeTags) | Q(preferredTags__search = prefeTags)) For instance: requTags might be: +beans +rice +cheese. requiredTags might be: beans,rice,tortilla preferredTags might be: cheese I didn't see any way to combine requiredTags and preferredTags in the documentation. Any help would be appreciated as I'm a beginner...

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  • Why isn't TextBox.Text in WPF animatable?

    - by cplotts
    Ok, I have just run into something that is really catching me off-guard. I was helping a fellow developer with a couple of unrelated questions and in his project he was animating text into some TextBlock(s). So, I went back to my desk and recreated the project (in order to answer his questions), but I accidentally used TextBox instead of TextBlock. My text wasn't animating at all! (A lot of help, I was!) Eventually, I figured out that his xaml was using TextBlock and mine was using TextBox. What is interesting, is that Blend wasn't creating key frames when I was using TextBox. So, I got it to work in Blend using TextBlock(s) and then modified the xaml by hand, converting the TextBlock(s) into TextBox(es). When I ran the project, I got the following error: InvalidOperationException: '(0)' Storyboard.TargetProperty path contains nonanimatable property 'Text'. Well, it seems as if Blend was smart enough to know that ... and not generate the key frames in the animation (it would just modify the value directly on the TextBox). +1 for Blend. So, the question became: why isn't TextBox.Text animatable? The usual answer is that the particular property you are animating isn't a DependencyProperty. But, this isn't the case, TextBox.Text is a DependencyProperty. So, now I am bewildered! Why can't you animate TextBox.Text? Let me include some xaml to illustrate the problem. The following xaml works ... but uses TextBlock(s). <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="TextBoxTextQuestion.MainWindow" x:Name="Window" Title="MainWindow" Width="640" Height="480" > <Window.Resources> <Storyboard x:Key="animateTextStoryboard"> <StringAnimationUsingKeyFrames Storyboard.TargetProperty="(TextBlock.Text)" Storyboard.TargetName="textControl"> <DiscreteStringKeyFrame KeyTime="0:0:1" Value="Goodbye"/> </StringAnimationUsingKeyFrames> </Storyboard> </Window.Resources> <Window.Triggers> <EventTrigger RoutedEvent="FrameworkElement.Loaded"> <BeginStoryboard Storyboard="{StaticResource animateTextStoryboard}"/> </EventTrigger> </Window.Triggers> <Grid x:Name="LayoutRoot"> <StackPanel Orientation="Vertical" HorizontalAlignment="Center" VerticalAlignment="Center"> <TextBlock x:Name="textControl" Text="Hello" FontFamily="Calibri" FontSize="32"/> <TextBlock Text="World!" Margin="0,25,0,0" FontFamily="Calibri" FontSize="32"/> </StackPanel> </Grid> </Window> The following xaml does not work and uses TextBox.Text: <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="TextBoxTextQuestion.MainWindow" x:Name="Window" Title="MainWindow" Width="640" Height="480" > <Window.Resources> <Storyboard x:Key="animateTextStoryboard"> <StringAnimationUsingKeyFrames Storyboard.TargetProperty="(TextBox.Text)" Storyboard.TargetName="textControl"> <DiscreteStringKeyFrame KeyTime="0:0:1" Value="Goodbye"/> </StringAnimationUsingKeyFrames> </Storyboard> </Window.Resources> <Window.Triggers> <EventTrigger RoutedEvent="FrameworkElement.Loaded"> <BeginStoryboard Storyboard="{StaticResource animateTextStoryboard}"/> </EventTrigger> </Window.Triggers> <Grid x:Name="LayoutRoot"> <StackPanel Orientation="Vertical" HorizontalAlignment="Center" VerticalAlignment="Center"> <TextBox x:Name="textControl" Text="Hello" FontFamily="Calibri" FontSize="32"/> <TextBox Text="World!" Margin="0,25,0,0" FontFamily="Calibri" FontSize="32"/> </StackPanel> </Grid> </Window>

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  • VS2010 add-in custom menu item in files of Solution Explorer

    - by NewProgrammer
    Hey guys, I need to create a custom menu item for Visual Studio 2010 Add-in in C#, but I have had no luck in coming with a solution anytime soon. I am aware that there was a similar post: http://stackoverflow.com/questions/2486818/visual-studio-add-in-adding-a-context-menu-item-to-solution-explorer But it did not help, as the blog follows the process through the integration package, and the video is done through VB. I had attempted to convert the VB syntax to the C# syntax, but about half way through the video, the Add-in methods has significantly changed from 2005 to 2010, as some of the methods have removed or changed. Is there any good tutorials on making a custom menu item on the Solution Explorer in the lastest Visual Studio in C#, and is there a good website that could be used as a reference for looking over the VS add-in API? I've used Microsoft's main website, however it is confusing and wordy, which is difficult to understand and find the methods, properties, or commands that I am looking for. Any help would be appreicated, Thanks in advance.

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  • How do I use waf to build a shared library?

    - by James Morris
    I want to build a shared library using waf as it looks much easier and less cluttered than GNU autotools. I actually have several questions so far related to the wscript I've started to write: VERSION='0.0.1' APPNAME='libmylib' srcdir = '.' blddir = 'build' def set_options(opt): opt.tool_options('compiler_cc') pass def configure(conf): conf.check_tool('compiler_cc') conf.env.append_value('CCFLAGS', '-std=gnu99 -Wall -pedantic -ggdb') def build(bld): bld.new_task_gen( features = 'cc cshlib', source = '*.c', target='libmylib') The line containing source = '*.c' does not work. Must I specify each and every .c file instead of using a wildcard? How can I enable a debug build for example (currently the wscript is using the debug builds CFLAGS, but I want to make this optional for the end user). It is planned for the library sources to be within a sub directory, and programs that use the lib each in their own sub directories.

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  • Create new UIImage by adding shadow to existing UIImage

    - by Tom Irving
    I've taken a look at this question: http://stackoverflow.com/questions/962827/uiimage-shadow But the accepted answer didn't work for me. What I'm trying to do is take a UIImage and add a shadow to it, then return a whole new UIImage, shadow and all. This is what I'm trying: - (UIImage*)imageWithShadow { CGColorSpaceRef colourSpace = CGColorSpaceCreateDeviceRGB(); CGContextRef shadowContext = CGBitmapContextCreate(NULL, self.size.width, self.size.height + 1, CGImageGetBitsPerComponent(self.CGImage), 0, colourSpace, kCGImageAlphaPremultipliedLast); CGColorSpaceRelease(colourSpace); CGContextSetShadow(shadowContext, CGSizeMake(0, -1), 1); CGContextDrawImage(shadowContext, CGRectMake(0, 0, self.size.width, self.size.height), self.CGImage); CGImageRef shadowedCGImage = CGBitmapContextCreateImage(shadowContext); CGContextRelease(shadowContext); UIImage * shadowedImage = [UIImage imageWithCGImage:shadowedCGImage]; CGImageRelease(shadowedCGImage); return shadowedImage; } The result is that I get exactly the same image as before I put it through this method. I am doing this the correct way, or is there something obvious I'm missing?

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  • Database design - alternatives for Entity Attribute Value (EAV)

    - by Bob
    Hi, see http://stackoverflow.com/questions/695752/product-table-many-kinds-of-product-each-product-has-many-parameters for similar topic. My question: i want to design a database, that will be used for a production facility of different types of products where each product has its own (number of) parameters. because i want the serial numbers to be in one tabel for overview purposes i have a problem with these different paraeters . One solution could be EAV, but it has its downsides, certainly because we have +- 5 products with every product +- 20.000 serial numbers (records). it looks a bit overkill to me... I just don't know how one could design a database so that you have an attribute in a mastertable that says: 'hey, you could find details of this record in THAT detail-table". 'in a way that you qould easely query the results) currenty i am using Visual Basic & Acces 2007. but i'm going to Visual Basic & MySQL. thanks for your help. Bob

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  • What is JDBC's Connection.isClosed() good for, and why is Snaq DBPool misbehaving on close?

    - by Uri
    I have the following code in Java: if(!conn.isClosed()) { conn.close(); } Instead of working, I am awarded with: java.sql.SQLException: Connection already closed My connection object is a Snaq.db.CacheConnection I checked the JavaDocs for isClosed, and they state that: This method generally cannot be called to determine whether a connection to a database is valid or invalid. A typical client can determine that a connection is invalid by catching any exceptions that might be thrown when an operation is attempted. So my questions are: 1) What good is JDBC's isClosed() anyway? Since when do we use Exceptions in Java to check for validity? 2) What is the correct pattern to close a database? Should I just close and swallow exceptions? 3) Any idea why would SnaqDB be closing the connection? (My backend is a Postgres 8.3)

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  • Trapping Error Status in MSBuild

    - by Ruben Bartelink
    As part of some build automation of running xUnit.net tests with MSBuild, I'm running into a case where I need to loop over a batch of items. Inside the loop, I need to detect whether an iteration failed, but I want to continue executing regardless. Then after the batched bit, I need to know whether one or more errors have occurred in order to report the outcome to TeamBuild. IOW, in pseudocode: Task Name=RunTests CreateItems ForEach item CallTarget Target=RunTest ContinueOnError=true CombineNUnitResults Report success/failure Task Name=RunTest XUnit item I'm hoping this can be achieved without a custom task (or hacking the xunit.net MSBuild task as Jonne did). (But willing to use MSBuild Community or Sdc tasks) And @BradWilson: I this is isnt possible to do cleanly, I'll be looking for Jonne's change a la the NUnit task to also make it into the xunit task See also: http://stackoverflow.com/questions/517560/how-do-i-get-team-build-to-show-test-results-and-coverage-for-xunit-net-test-suit

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  • Visual Studio 2010: adding a service reference to a 2008 generated wsdl

    - by Snake
    Doesn't produce a app.config . In my team there is a guy who has Visual Studio 2008, he created a webservice. Then there is me, adding this webservice to a console project. Adding the service reference goes without problems but no valid app.config is generated. It's just empty <configuration> </configuration> When I disable 'reuse types' in my service reference it works but then I get an ambiguous error. Is this a bug? I found http://stackoverflow.com/questions/2159107/visual-studio-does-not-generate-app-config-content-when-add-service-reference this one, but there is no solution there, so I thought I bump the problem up again. Thanks

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  • Find Window At Location Using Carbon And Carbon Problems In 64-Bit Applications

    - by JxXx
    As I said in some questions today I´m looking for the way to get window or windowPart references at a certain location. Although I know I could use Cocoa for this purpose (I don´t know how to do it yet) I prefer (and probably need) to do this using Carbon because the entire application that needs this functionality is written in C++ but I´ve found many problems trying it. Does anyone get a valid windowPtr or windowRef using one of the following functions? FindWindow, MacFindWindow, HIWindowFindAtLocation or FindWindowOfClass I always get 0 as the windowRef or windowPtr that I´m looking for. What I´m doing wrong? Any ideas? It´s true that now if you want to create a 64-bit application for Mac OS X, you need to use Cocoa to implement its user interface because some APIs commonly used by Carbon applications are not available in 64-bit applications? Thank you. JxXx

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  • MS Access 2003 - Message Box: How can I answer "ok" automatically through code

    - by Justin
    So a couple silly questions: If I include this in some event: MsgBox " ", vbOkOnly, "This little message box" could I then with some more code turn around and 'click the ok button. So that basically the message boox automatically pops up, and then automatically goes away? I know its silly because you want to know, why do you want the message box then..... well a) i just want to know if you can do that, and what would be the command b) i have some basic shapes (shape objects) that are made visible when the message box appears. But without having the message box there, there is no temporary disruption of code while waiting for the button to be clicked, and therefor those pretty image objects being made visible does take effect on the the form. So I really do not need the message box, just the temp disruption that shows the objects. Thanks!

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  • JAVA: Sort ArrayList<ArrayList<Integer>> on multiple columns

    - by Bob
    First, I did do my homework searching before posting here. My requirement seems to be slightly different compared to questions posted out there. I have a matrix like ArrayList<ArrayList<Integer>> in the following form | id1 | id2 | score | |-----|-----|-------| | 1 | 3 | 95% | | 1 | 2 | 100% | | 1 | 4 | 85% | | 1 | 5 | 95% | | 2 | 10 | 80% | | 2 | 15 | 99% | I want to sort the matrix column-wise (first using score, then the id1). I already have the id1 in a sorted manner. That means I also need to sort all records with the same id1 first by using score, second by the id2. The reason for doing this is to create a ranking of the id2 in each id1. The result for the above example would be: | q_id | d_id | rank | score | |------|------|------|-------| | 1 | 2 | 1 | 100% | | 1 | 3 | 2 | 95% | | 1 | 5 | 3 | 95% | | 1 | 4 | 4 | 85% | | 2 | 15 | 1 | 99% | | 2 | 10 | 2 | 80% | How can I achieve this in Java using some built-in methods of collections?

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  • Java OpenGL color material darkens when depth test is disabled

    - by Jeff Storey
    I've been working with the depth buffer in OpenGL (JOGL) to ensure certain items are rendered in front of others by disabling the depth buffer (detailed in my previous question http://stackoverflow.com/questions/2516086/java-opengl-saving-depth-buffer). This works, except when I set the color of an item that is being drawn when the depth test is disabled, none of the material shininess shows up. The item is rendered as a darker version of the original color (it seems like there is no lighting effect really applied to it). Is there a reason why this would be happening? and how might I prevent this? thanks, Jeff

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  • Javascript, jQuery: external file

    - by Patrick
    hi, I'm loading an external js file in the header of my html document and I have 2 questions about it: 1) I've added alert("ok"); in my external file but I cannot see any message. I guess because this file is loaded before the page is completed... or something like this (in the header), right ? 2) Then I added the jQuery code: $(document).ready( function() { alert("ok"); }); but still no signal of life... what am I doing wrong ? thanks

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  • this is my Receiving Email code,but can't Receiving Email .. (google-app-engine)

    - by zjm1126
    import logging, email from google.appengine.ext import webapp from google.appengine.ext.webapp.mail_handlers import InboundMailHandler from google.appengine.ext.webapp.util import run_wsgi_app class LogSenderHandler(InboundMailHandler): def receive(self, message): _subject = message.subject _sender=message.sender bodies = message.bodies('text/plain') allBodies = "" #for body in bodies: # allBodies = allBodies + "\n---------------------------\n" + body[1].decode() #m= mail.EmailMessage(sender="[email protected] ",subject="reply to "+_subject) #m.to = _sender #m.body =allBodies #m.send() message = mail.EmailMessage(sender="[email protected]", subject="Your account has been approved") message.to = _sender message.body = """ Dear Albert: Your example.com account has been approved. You can now visit http://www.example.com/ and sign in using your Google Account to access new features. Please let us know if you have any questions. The example.com Team """ message.send() application = webapp.WSGIApplication([LogSenderHandler.mapping()], debug=True) app.yaml: application: zjm1126 version: 1-2 runtime: python api_version: 1 inbound_services: - mail handlers: - url: /media static_dir: media - url: /_ah/mail/.+ script: handle_incoming_email.py login: admin - url: / script: a.py - url: /sign script: a.py - url: .* script: django_bootstrap.py i use my email:[email protected] send some words to [email protected] but i can't get a Receiving Email, why ??? thanks and this is the log:

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  • SQLite3's dynamic typing

    - by Bradford Larsen
    SQLite3 uses dynamic typing rather than static typing, in contrast to other flavors of SQL. The SQLite website reads: Most SQL database engines (every SQL database engine other than SQLite, as far as we know) uses static, rigid typing. With static typing, the datatype of a value is determined by its container - the particular column in which the value is stored. SQLite uses a more general dynamic type system. In SQLite, the datatype of a value is associated with the value itself, not with its container. It seems to me that this is exactly what you don't want, as it lets you store, for example, strings in integer columns. The page continues: ...the dynamic typing in SQLite allows it to do things which are not possible in traditional rigidly typed databases. I have two questions: The use case question: What are some examples where sqlite3's dynamic typing is, in fact, beneficial? The historical/design question: What was the motivation for implementing sqlite with dynamic typing?

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  • Does it make sense to use a NSFetchedResultsController without an UITableViewController? How are the

    - by dontWatchMyProfile
    I mean... could I also just create a plain old UIViewController and then set up a UITableView myself, plus an NSFetchedResultsController? How much do UITableViewController and NSFetchedResultsController interact with eachother? As far as I see it, UITableViewController is NOT by default already adopting the NSFetchedResultsControllerDelegate protocol. It almost looks like if UITableViewController has been developed without knowing about NSFetchedResultsController. Probably they even did that before developing FRC. Anyways, just a raw guess because the UITableViewController lacks of mentioning FRC at all. So the only thing I see in UITableViewController is that it is already the delegate for a UITableView by adopting the protocol, and it sets up the UITableView instance for me and assigns it internally to it's tableView property. Is that the whole magic of UITableViewController? (note: the nsfetchedresultscontrolle tag is not a typo. SO has a limit for the num of chars...too bad for that missing r, that's why I avoided this tag in my other buch of questions like the plague)

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  • Load Balancing using SQL Server and TempData MVC

    - by Jamie
    Hi all, I've been told that MVC 1.0 TempData does not work under a load balancer when using SQL Server and that it is because the Dictionary itself is not serializable. We require this for a project and are looking to be able load balancer effectively. So I would be very grateful if someone could answer the following questions: Is there away around this so you can make it work? Is this fixed in MVC 2.0? Can we create a ITempDataProvider to fix it? Or has anyone made a fix to the source code for a project of their own they would like to share? Cheers, Jamie

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