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  • Javascript: Pass array as optional method args

    - by Dave Paroulek
    console.log takes a string and replaces tokens with values, for example: console.log("My name is %s, and I like %", 'Dave', 'Javascript') would print: My name is Dave, and I like Javascript I'd like to wrap this inside a method like so: function log(msg, values) { if(config.log == true){ console.log(msg, values); } } The 'values' arg might be a single value or several optional args. How can I accomplish this? If I call it like so: log("My name is %s, and I like %s", "Dave", "Javascript"); I get this (it doesn't recognize "Javascript" as a 3rd argument): My name is Dave, and I like %s If I call this: log("My name is %s, and I like %s", ["Dave", "Javascript"]); then it treats the second arg as an array (it doesn't expand to multiple args). What trick am I missing to get it to expand the optional args?

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  • Why not lump all service classes into a Factory method (instead of injecting interfaces)?

    - by Andrew
    We are building an ASP.NET project, and encapsulating all of our business logic in service classes. Some is in the domain objects, but generally those are rather anemic (due to the ORM we are using, that won't change). To better enable unit testing, we define interfaces for each service and utilize D.I.. E.g. here are a couple of the interfaces: IEmployeeService IDepartmentService IOrderService ... All of the methods in these services are basically groups of tasks, and the classes contain no private member variables (other than references to the dependent services). Before we worried about Unit Testing, we'd just declare all these classes as static and have them call each other directly. Now we'll set up the class like this if the service depends on other services: public EmployeeService : IEmployeeService { private readonly IOrderService _orderSvc; private readonly IDepartmentService _deptSvc; private readonly IEmployeeRepository _empRep; public EmployeeService(IOrderService orderSvc , IDepartmentService deptSvc , IEmployeeRepository empRep) { _orderSvc = orderSvc; _deptSvc = deptSvc; _empRep = empRep; } //methods down here } This really isn't usually a problem, but I wonder why not set up a factory class that we pass around instead? i.e. public ServiceFactory { virtual IEmployeeService GetEmployeeService(); virtual IDepartmentService GetDepartmentService(); virtual IOrderService GetOrderService(); } Then instead of calling: _orderSvc.CalcOrderTotal(orderId) we'd call _svcFactory.GetOrderService.CalcOrderTotal(orderid) What's the downfall of this method? It's still testable, it still allows us to use D.I. (and handle external dependencies like database contexts and e-mail senders via D.I. within and outside the factory), and it eliminates a lot of D.I. setup and consolidates dependencies more. Thanks for your thoughts!

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  • Unit testing with Mocks when SUT is leveraging Task Parallel Libaray

    - by StevenH
    I am trying to unit test / verify that a method is being called on a dependency, by the system under test. The depenedency is IFoo. The dependent class is IBar. IBar is implemented as Bar. Bar will call Start() on IFoo in a new (System.Threading.Tasks.)Task, when Start() is called on Bar instance. Unit Test (Moq): [Test] public void StartBar_ShouldCallStartOnAllFoo_WhenFoosExist() { //ARRANGE //Create a foo, and setup expectation var mockFoo0 = new Mock<IFoo>(); mockFoo0.Setup(foo => foo.Start()); var mockFoo1 = new Mock<IFoo>(); mockFoo1.Setup(foo => foo.Start()); //Add mockobjects to a collection var foos = new List<IFoo> { mockFoo0.Object, mockFoo1.Object }; IBar sutBar = new Bar(foos); //ACT sutBar.Start(); //Should call mockFoo.Start() //ASSERT mockFoo0.VerifyAll(); mockFoo1.VerifyAll(); } Implementation of IBar as Bar: class Bar : IBar { private IEnumerable<IFoo> Foos { get; set; } public Bar(IEnumerable<IFoo> foos) { Foos = foos; } public void Start() { foreach(var foo in Foos) { Task.Factory.StartNew( () => { foo.Start(); }); } } } I appears that the issue is obviously due to the fact that the call to "foo.Start()" is taking place on another thread (/task), and the mock (Moq framework) can't detect it. But I could be wrong. Thanks

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  • Perl open call failing.

    - by benjamin button
    I am new to perl coding. I am facing a problem while executing a small script i have: open is not able to find the file which i am giving as an argument.Please see below: File is available: ls -l DLmissing_months.sql -rwxr-xr-x 1 tlmwrk61 aimsys 2842 May 16 09:44 DLmissing_months.sql My perl script: #!/usr/local/bin/perl use strict; use warnings; my $this_line = ""; my $do_next = 0; my $file_name = $ARGV[0]; open( my $fh, '<', '$file_name') or die "Error opening file - $!\n"; close($fh); executing the perl script : > new.pl DLmissing_months.sql Error opening file - No such file or directory what is the problem with my perl script.

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  • no matching function for call to 'getline'

    - by WTP
    I have a class called parser: class parser { const std::istream& stream; public: parser(const std::istream& stream_) : stream(stream_) {} ~parser() {} void parse(); }; In parser::parse I want to loop over each line, so I use std::getline: std::getline(stream, line) The compiler gives me this error, however: src/parser.cc:10:7: error: no matching function for call to 'getline' std::getline(stream, line); ^~~~~~~~~~~~ But the first argument to std::getline is of type std::istream&, right? What could I be doing wrong?

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  • Passing javascript objects as function arguments

    - by Prashant
    Hello all I want to pass a javascript object (JSON) as an argument to another function. But i am getting following error: missing ] after element list the function is called on onclick event of href like "<a href='javascript:void(0);' onclick='javascript:openTab("+ sTab +");'>"+ sTab['SavedTab']['title'] +"</a><br/>"; When i pass whole value : sTab['SavedTab']['title'] , it works fine but i want to pass whole object, not just single value out of it. Please help me out. Thanks.

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  • What would you recommend to do simple 2D Graphics?

    - by Tom Ritter
    I want to build a program that will (as part of what it's doing) display lines organically growing and interacting horizontally across the screen. Here's a sample image, just imagine the lines sprouting from the left and growing to the right: The lines would look like the lines used on Google Maps Transit Overlay or OnNYTurf's transit pages. It's a personal project, so I'm open to just about any language and library combination. But I don't know where to start. What have you used in the past to create graphics that are similar to this? What would you recommend? I want it to run on Windows without any extras needed (.Net is fine), and it doesn't have to run elsewhere. I needs to run as an actual program, not javascript in the browser. There's obviously no 'right' answer to this, but the purpose isn't to start an argument about X better than Y but rather just find a list of graphics toolkits that do simple 2D graphics that people recommend because of their ease of use or community or whatever.

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  • LaTeX printing only first two pages of a document

    - by Peter Flom
    I am working in LaTeX, and when I create a pdf file (using LaTeX button or pdfLaTeX button or using yap) the pdf has only the first two pages. No errors. It just stops. If I make the first page longer by adding text, it still stops at end of 2nd page. Any ideas? OK, responding to first comment, here is the code \documentclass{article} \title{Outline of Book} \author{Peter L. Flom} \begin{document} \maketitle \section*{Preface} \subsection*{Audience} \subsection*{What makes this book different?} \subsection*{Necessary background} \subsection*{How to read this book} \section{Introduction} \subsection{The purpose of logistic regression} \subsection{The need for logistic regression} \subsection{Types of logistic regression} \section{General issues in logistic regression} \subsection{Transforming independent and dependent variables} \subsection{Interactions} \subsection{Model selection} \subsection{Parameter estimates, confidence intervals, p values} \subsection{Summary and further reading} \section{Dichotomous logistic regression} \subsection{Introduction, theory, examples} \subsection{Exploratory plots and analysis} \subsection{Basic model fitting} \subsection{Advanced and special issues in model fitting} \subsection{Diagnostic and descriptive plots and analysis} \subsection{Traps and gotchas} \subsection{Power analysis} \subsection{Summary and further reading} \subsection{Exercises} \section{Ordinal logistic regression} \subsection{Introduction, theory, examples} \subsubsection{Introduction - what are ordinal variables?} \subsubsection{Theory of the model} \subsubsection{Examples for this chapter} \subsection{Exploratory plots and analysis} \subsection{Basic model fitting} \subsection{Advanced and special issues in model fitting} \subsection{Diagnostic and descriptive plots and analysis} \subsection{Traps and gotchas} \subsection{Power analysis} \subsection{Summary and further reading} \subsection{Exercises} \section{Multinomial logistic regression} \subsection{Introduction, theory, examples} \subsection{Exploratory plots and analysis} \subsection{Basic model fitting} \subsection{Advanced and special issues in model fitting} \subsection{Diagnostic and descriptive plots and analysis} \subsection{Traps and gotchas} \subsection{Power analysis} \subsection{Summary and further reading} \subsection{Exercises} \section{Choosing a model} \subsection{NOIR and its problems} \subsection{Linear vs. ordinal} \subsection{Ordinal vs. multinomial} \subsection{Summary and further reading} \subsection{Exercises} \section{Extensions and related models} \subsection{Other logistic models} \subsection{Multilevel models - PROC NLMIXED and GLIMMIX} \subsection{Loglinear models - PROC CATMOD} \section{Summary} \end{document} thanks Peter

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  • Nested Object Forms not working as expected

    - by Craig Walker
    I'm trying to get a nested model forms view working. As far as I can tell I'm doing everything right, but it still does not work. I'm on Rails 3 beta 3. My models are as expected: class Recipe < ActiveRecord::Base has_many :ingredients, :dependent => :destroy accepts_nested_attributes_for :ingredients attr_accessible :name end class Ingredient < ActiveRecord::Base attr_accessible :name, :sort_order, :amount belongs_to :recipe end I can use Recipe.ingredients_attributes= as expected: recipe = Recipe.new recipe.ingredients_attributes = [ {:name=>"flour", :amount=>"1 cup"}, {:name=>"sugar", :amount=>"2 cups"}] recipe.ingredients.size # -> 2; ingredients contains expected instances However, I cannot create new object graphs using a hash of parameters as shown in the documentation: params = { :name => "test", :ingredients_attributes => [ {:name=>"flour", :amount=>"1 cup"}, {:name=>"sugar", :amount=>"2 cups"}] } recipe = Recipe.new(params) recipe.name # -> "test" recipe.ingredients # -> []; no ingredient instances in the collection Is there something I'm doing wrong here? Or is there a problem in the Rails 3 beta?

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  • scanf("%d", char*) - char-as-int format string?

    - by SF.
    What is the format string modifier for char-as-number? I want to read in a number never exceeding 255 (actually much less) into an unsigned char type variable using sscanf. Using the typical char source[] = "x32"; char separator; unsigned char dest; int len; len = sscanf(source,"%c%d",&separator,&dest); // validate and proceed... I'm getting the expected warning: argument 4 of sscanf is type char*, int* expected. As I understand the specs, there is no modifier for char (like %sd for short, or %lld for 64-bit long) is it dangerous? (will overflow just overflow (roll-over) the variable or will it write outside the allocated space?) is there a prettier way to achieve that than allocating a temporary int variable? ...or would you suggest an entirely different approach altogether?

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  • Is jQuery always the answer?

    - by Kibbee
    I've come across a couple questions, such as this one, and I really have to wonder why "Use jQuery" seems to be the answer when somebody asks how to do something in JavaScript. I understand that jQuery can save you a lot of time, and can help you out a lot, especially when you are doing a lot of fancy JavaScript in your site. However, in instances like this, and in many other instances, it seems like it's just jumping around the problem instead of answering the question. I also feel like this builds too much dependency into libraries. I've seen way too many developers that simply rely too much on libraries, and if they encounter a situation where they didn't have the library, they would be completely unable to function. I feel like there are already enough developers who don't know JavaScript, without just telling everybody to not learn JavaScript, and use jQuery. So, just to reiterate the question. Do you think there's too much of a tendency to use jQuery, for small pieces of JavaScript, when most of the functionality of jQuery isn't being used. Should developers be fluent in the use of bare JavaScript so they don't get too dependent on using libraries? [Additional related conversation topic] Does the existence of jQuery give too much slack to web browser developers who write the JavaScript engines? If we just have workarounds to cover all the inconsistencies in JavaScript, what pressure is there on browser makers to ensure that their JavaScript library works as it should. I feel like this extrapolates the same problem discussed in SO Podcast #36 of "be conservative in what you send, liberal in what you accept". By being so liberal with bad JavaScript engines, and using a common library to work around the flaws, we are promoting their use, and extending the problem.

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  • if (i == 2) or if (2 == i) ?

    - by Maroloccio
    I usually use if (i == 2) in preference to if (2 == i) On occasion, I would switch things around when writing xUnit-type tests from scratch so as to follow the assertion convention of "expected" preceding "actual". When adding to existing unit tests, I always follow the style I find. No matter what, I always try to keep things consistent. Today I checked out some code with a lot of "if (2 == i)" and started wondering: which style is more "popular" nowadays? is popularity language-dependent? The latter probably because I am aware of why the "if (2 == i)" became common in the first place (C heritage) and because I see some languages go as far as disallowing assignments within conditions (e.g. Python). I thought about downloading some sources: apt-get source linux-source eclipse openoffice.org expanding them and performing a quick grep: grep --color --include=*.java --include=*.c -ERI \ "if[[:space:]]*\([[:space:]]*[[:digit:]]+[[:space:]]==" . or creating a quick "poll": http://goo.gl/mod/ciMF after a bit of searching and asking around, I am still not sure. So I am asking you: which way to go?

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  • Next, Previous Records Using Named Scope

    - by keruilin
    I have a model for which I want to retrieve the next record(s) and previous record(s). I want to do this via a named_scope on the model, and also pass in as an argument the X number of next/previous records to return. For example, let's say I have 5 records: Record1 Record2 Record3 Record4 Record5 I want to be able to call Model.previous or Model.previous(1) to return Record2. Similarly, I want to be able to call Model.next or Model.next(1) to return Record4. As another example I want to be able to call Model.previous(2) to return Record3. I think you get the idea. How can I accomplish this?

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  • If the UIApplicationMain() never returns then when does the autorelease pool gets released?

    - by sid
    For code: int main(int argc, char *argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; int retVal = UIApplicationMain(argc, argv, nil, nil); [pool release]; return retVal; } Apple's doc clearly specifies: Return Value: Even though an integer return type is specified, this function never returns. When users terminate an iPhone application by pressing the Home button, the application immediately exits by calling the exit system function with an argument of zero. Secondly, in int UIApplicationMain ( int argc, char *argv[], NSString *principalClassName, NSString *delegateClassName ); how can we access the argv from our UIApplication subclass?

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  • How to set up Flex Unit 4

    - by macke
    Does anyone know of any guides or any sort of documentation on how to set up the new Flex Builder 4 beta? I've been pulling my hair all day long, none of my tests are executed and I can't for the life of me understand what's wrong. There are no errors at all. It's as if the metadata tags are not recognized, is there some special compiler argument to recognize them? I seem to remember that this is not necessary as long as the swc files that are included were compiled with said arguments. I'm using Beta 1 of Flex Unit 4 which can be found here: http://opensource.adobe.com/wiki/display/flexunit/FlexUnit+4+feature+overview I'm actually using the very same code that is included with that package to run the tests, but no tests are executed. Neither mine nor the ones included in the FU4 package. The lack of documentation certainly doesn't help much...

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  • How to access pixels of an NSBitmapImageRep?

    - by Paperflyer
    I have an NSBitmapImageRep that is created like this: NSBitmapImageRep *imageRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:NULL pixelsWide:waveformSize.width pixelsHigh:waveformSize.height bitsPerSample:8 samplesPerPixel:4 hasAlpha:YES isPlanar:YES colorSpaceName:NSCalibratedRGBColorSpace bytesPerRow:0 bitsPerPixel:0]; Now I want to access the pixel data so I get a pointer to the pixel planes using unsigned char *bitmapData; [imageRep getBitmapDataPlanes:&bitmapData]; According to the Documentation this returns a C array of five character pointers. But how can it do that? since the type of the argument is unsigned char **, it can only return an array of chars, but not an array of char pointers. So, this leaves me wondering how to access the individual pixels. Do you have an idea how to do that? (I know there is the method – setColor:atX:y:, but it seems to be pretty slow if invoked for every single pixel of a big bitmap.)

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  • Web scraping: how to get scraper implementation from text link?

    - by isme
    I'm building a java web media-scraping application for extracting content from a variety of popular websites: youtube, facebook, rapidshare, and so on. The application will include a search capability to find content urls, but should also allow the user to paste a url into the application if they already where the media is. Youtube Downloader already does this for a variety of video sites. When the program is supplied with a URL, it decides which kind of scraper to use to get the content; for example, a youtube watch link returns a YoutubeScraper, a Facebook fanpage link returns a FacebookScraper and so on. Should I use the factory pattern to do this? My idea is that the factory has one public method. It takes a String argument representing a link, and returns a suitable implementation of the Scraper interface. I guess the Factory would hold a list of Scraper implementations, and would match the link against each Scraper until it finds a suitable one. If there is no suitable one, it throws an Exception instead.

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  • Approaches to use Repositories (w/ StructureMap) with AutoMapper?

    - by jacko
    Any idea how I can tell AutoMapper to resolve a TypeConverter constructor argument using StructureMap? ie. We have this: private class GuidToContentProviderConverter : TypeConverter<Guid, ContentProvider> { private readonly IContentProviderRepository _repository; public GuidToContentProviderConverter(IContentProviderRepository repository) { _repository = repository; } protected override ContentProvider ConvertCore(Guid contentProviderId) { return _repository.Get(contentProviderId); } } And in the AutoMap registration: Mapper.CreateMap<Guid, ContentProvider>().ConstructUsing<GuidToContentProviderConverter>(); However, this generates a compile-time error about ctor args. Any ideas? Or ideas to other approaches for using Automapper to hydrate domain objects from viewmodel ID's using a repository?

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  • How do I determine if a JDialog has children?

    - by Morinar
    I've got a custom window class that is a couple levels down extending a JDialog. We have windows that we create and sometimes we create new windows as children of existing windows using the constructor that takes a parent argument. I need to put some code somewhere in our custom class that does something different depending on whether not the window has children. I know of getParent(), etc, and I can see that I can loop through the components of the window, but for the life of me, I can't seem to figure out how to determine whether or not my current window has any child windows. Is there a way to do this? Any help is, as always, much appreciated.

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  • compare previous ENCRYPT() call with new ENCRYPT() call mysql

    - by contagious
    I'm storing a string in mysql with the ENCRYPT() function. I want to fetch a row where that string is matched, but the new ENCRYPT() call gives me a different value, so they never match. This is expected as i'm not (and can't) give it a consistent salt: http://dev.mysql.com/doc/refman/5.0/en/encryption-functions.html#function_encrypt If no salt argument is given, a random value is used. This is the query i'm running that returns empty: SELECT * FROM `table` WHERE ENCRYPT('string') = `enc_string` I know this is possible because this is used by a 3rd party app, but I can't find their query where they do this. Is there a way to force ENCRYPT to use the previous salt, or predict it?

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  • Volatile or synchronized for primitive type?

    - by DKSRathore
    In java, assignment is atomic if the size of the variable is less that or equal to 32 bits but is not if more than 32 bits. What(volatile/synchronized) would be more efficient to use in case of double or long assignment. like, volatile double x = y; synchronized is not applicable with primitive argument. How do i use synchronized in this case. Of course I don't want to lock my class. so this should not be used.

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  • How to get smartcard reader name in Windows 7 using C#?

    - by AndrejaKo
    Hi! I'm trying to make a C# program which will use a C .dll (unfortunately, the .dll doesn't have good documentation) to access a smart card. One of the functions of the .dll uses name of the reader as argument. My problem is that I don't know how to get the name. After looking for answers I found something similar to what I need in an example here: http://msdn.microsoft.com/en-us/library/aa379803%28VS.85%29.aspx I'm looking for a way to get szReader value as described in the aforementioned example using C#. Can anyone help me or at least point me in the right direction?

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  • Does Process.StartInfo.Arguments support a UTF-8 string?

    - by Patrick Klug
    Can you use a UTF-8 string as the Arguments for a StartInfo? I am trying to pass a UTF-8 (in this case a Japanese string) to an application as a console argument. Something like this (this is just an example! (cmd.exe would be a custom app)) var process = new System.Diagnostics.Process(); process.StartInfo.Arguments = "/K \"echo ????????\""; process.StartInfo.FileName = "cmd.exe"; process.StartInfo.UseShellExecute = true; process.Start(); process.WaitForExit(); Executing this seems to loose the UTF-8 string and all the target application sees is "echo ?????????" When executing this command directly on the command line (by pasting the arguments) the target application receives the string correctly even though the command line itself doesn't seem to display it correctly. Do I need to do anything special to enable UTF-8 support in the arguments or is this just not supported?

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  • Is WPF the Future of Windows UI Development?

    - by Randy Minder
    We're debating whether our future Windows UI development should be WinForms or WPF. How have some of you made this decision? Most of our applications are LOB applications, and I'm not sure I see a clear and overwhelming benefit to WPF for these types of applications. However, my knowledge of WPF is limited. I'm also a little concerned that WPF will be in vogue for another couple years and then Microsoft will get tired of it and push something else on us. I guess one argument against this is the fact that Visual Studio 2010 is a WPF application. Thanks.

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  • Exponential regression : p-value and F significance

    - by Saravanan K
    I am new to statistics. I have a set of independent data and dependent data (X,Y), where I would like to do an exponential regression to obtain its p-value and significant F (already obtained R2 and also the coefficients through mathematical calculation). What is the natural evolution from the (X,Y) data to mathematically calculate those variables. Spent a week on the internet to study this but unable to find the right answer. Often an exponential data, y=be^(mx) will be converted first to a linear data, ln y = mx + ln b . Then a linear regression will done on the converted data, obtaining its p-value etc. Assume we use a statistical tool such as Excel's Analysis ToolPak: Data Analysis : Regression, it will produce a result such as below, I believe the p-value and Significant F value is representing the converted linear data and not the original exponential data. Questions: What is the approach/steps used by Excel to get the p-value and Significant F value for the converted linear data as shown in the statistic output in the image above? It is not clear in their help page or website. Can the p-value and Significant F could be mathematically calculated for exponential regression without using a statistical tool? Can you assist to point me to the right link if this has been answered before.

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