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  • groovy closure parameters

    - by Don
    Hi, The following example of using the sendMail method provided by the grails mail plugin appears in this book. sendMail { to "[email protected]" subject "Registration Complete" body view:"/foo/bar", model:[user:new User()] } I understand that the code within {} is a closure that is passed to sendMail as a parameter. I also understand that to, subject and body are method calls. I'm trying to figure out what the code that implements the sendMail method would look like, and my best guess is something like this: MailService { String subject String recipient String view def model sendMail(closure) { closure.call() // Code to send the mail now that all the // various properties have been set } to(recipient) { this.recipient = recipient } subject(subject) { this.subject = subject; } body(view, model) { this.view = view this.model = model } } Is this reasonable, or am I missing something? In particular, are the methods invokedwithin the closure (to, subject, body), necessarily members of the same class as sendMail? Thanks, Don

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  • cached schwartzian transform

    - by davidk01
    I'm going through "Intermediate Perl" and it's pretty cool. I just finished the section on "The Schwartzian Transform" and after it sunk in I started to wonder why the transform doesn't use a cache. In lists that have several repeated values the transform recomputes the value for each one so I thought why not use a hash to cache results. Here' some code: # a place to keep our results my %cache; # the transformation we are interested in sub foo { # expensive operations } # some data my @unsorted_list = ....; # sorting with the help of the cache my @sorted_list = sort { ($cache{$a} or $cache{$a} = &foo($a)) <=> ($cache{$b} or $cache{$b} = &foo($b)) } @unsorted_list; Am I missing something? Why isn't the cached version of the Schwartzian transform listed in books and in general just better circulated because on first glance I think the cached version should be more efficient?

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  • What are the Hot and Cold observables?

    - by Sergey Aldoukhov
    I watched the video and I know the general principles - hot happens even when nobody is subscribed, cold happens "on demand". Also, Publish() converts cold to hot and Defer() converts hot to cold. But still, I feel I am missing the details. Here are some questions I'd like to have answered: Can you give a comprehensive definition for these terms? Does it ever make sense to call Publish on hot observable or Defer on cold? Is there differences between hot and cold definitions for IObservable and IEnumerable? What are the general principles you should take into account when programming for cold or hot? Any other tips on hot/cold observables?

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  • Why can one aliased C# Type not be accessed by another?

    - by jdk
    good stuff // ok to alias a List Type using AliasStringList = System.Collections.Generic.List<string>; // and ok to alias a List of Lists like this using AliasListOfStringList1 = System.Collections.Generic.List<System.Collections.Generic.List<string>>; bad stuff // However **error** to alias another alias using AliasListOfStringList2 = System.Collections.Generic.List<AliasStringList>; Produces the compile error The type or namespace name 'AliasStringList' could not be found (are you missing a using directive or an assembly reference?) Note: this is the using directive not the using statement.

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  • Emacs CEDET and system include paths

    - by synasius
    Hello everyone, I'd like to add path to the openMPI library headers. So, after i found all openMPI headers are in /usr/lib/openmpi/include/* i added these two lines to my .emacs: (semantic-add-system-include "/usr/lib/openmpi/include" 'c-mode) (semantic-add-system-include "/usr/lib/openmpi/include" 'c++-mode) I think this is ok, but it's not working! This is the result of semantic-c-describe-envirnoment command: This file's system include path is: /usr/include /usr/local/include/ /usr/lib/gcc/i486-linux-gnu/4.4.3/include/ /usr/lib/gcc/i486-linux-gnu/4.4.3/include-fixed/ /usr/include/ Can't figure out what's wrong or what i'm missing Thanks

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  • hibernate order by association

    - by Gary Kephart
    I'm using Hibernate 3.2, and using criteria to build a query. I'd like to add and "order by" for a many-to-one association, but I don't see how that can be done. The Hibernate query would end up looking like this, I guess: select t1.a, t1.b, t1.c, t2.dd, t2.ee from t1 inner join t2 on t1.a = t2.aa order by t2.dd <-- need to add this I've tried criteria.addOrder("assnName.propertyName") but it doesn't work. I know it can be done for normal properties. Am I missing something?

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  • CodeIgniter based e-shop, shipping and gift address design problem

    - by alexander
    While building an ecommerce platform I have run into design problems. I'm working with the built-in CodeIgniter's cart class. It stores all the cart information in session. Let say that cart has already been filled with products and user clicks checkout. When should I store order in database? Just after that click or after several steps of gathering information and stoing it in session? How to deal with additional features like different shipping methods? Should I add it to the basket first and get additional (gift address) to session? I dont want to store it in database because of the relation between gift address and order is needed and since I dont know what's the ID of the order. I'm puzzled :) Additionally I think its crucial to keep cart aware of shipping methods and additional bought services (by selecting gift address there is an extra fee) because the cart content is just like an reciept? In brief, what is the best practice to process checkout?

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  • WPF Multiline TextBlock LineBreak issues

    - by KMC
    I have the following code txtBlock1.Inlines.Add("This is first paragraph \n This is second paragraph"); then TextBlock would display: This is first paragraph This is second paragraph But, if I have the following (which I though is equivalent); txtBlock1.Inlines.Add("This is first paragraph"); txtBlock1.Inlines.Add("\n"); txtBlock1.Inlines.Add("This is second paragraph"); TextBlock display: This is first paragraph // but second paragraph missing If I separate out the linebreak then the rest of text after the linebreak doesn't show. Why? I have to use run: Run run1 = new Run(); run1.Text = "First Paragraph"; run1.Text += "\n"; run1.Text += "Second Paragraph"; txtBlock1.Inlines.Add(run1); Then it produce the result correctly. Why I cannot add inline text to Textblock and require me to use Run?

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  • org.hibernate.annotations.Entity not being picked up by Hibernate 3.6

    - by user1317764
    I am using hibernate 3.6.7 I am using annotated classes. My classes were annotated with org.hibernate.annotations.Entity. Added the classes to configuration using configuration.addAnnotatedClass() method. Hibernate does not seem to pick it up. Stuff works fine if I use the standard jpa Entity annotation. What am I missing? I know that the classes have been deprecated in the Hibernate 4.x releases with the advent of newer annotations to configure stuff like dynamic-insert and dynamic-updates. I am not using any XML configuration file. I am setting up configuration with a properties file and using java apis.

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  • Best way to implement a 404 in ASP.NET

    - by Ben Mills
    I'm trying to determine the best way to implement a 404 page in a standard ASP.NET web application. I currently catch 404 errors in the Application_Error event in the Global.asax file and redirect to a friendly 404.aspx page. The problem is that the request sees a 302 redirect followed by a 404 page missing. Is there a way to bypass the redirect and respond with an immediate 404 containing the friendly error message? Does a web crawler such as Googlebot care if the request for a non existing page returns a 302 followed by a 404?

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  • What Ruby blog engines are there?

    - by Damian Nowak
    What blog engines written in Ruby do you know? Let's create a list of all Ruby blog engines as a community wiki. I kindly ask to include the following in your answers: blog engine name link to official website link to screenshots or live demo gem install gem-name (if there is one) features, for example: has plugin engine? has themes? has administration panel? anything worth mentioning Not an endorsement, just report the facts. This will make the answers very helpful to visitors. :-) Please mark your answer as a community wiki so that anyone is able to refine the description, add links, etc. It seems noone asked the question before. Found some which aren't the thing I'm really asking for. Ruby CMS/blog: Mephisto vs. Radiant (choosing which is better) Ruby Based Blogging Engine (asking just about rack-enabled blog engines) Blog Engine for Rails Application (limited to Rails)

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  • mkdir error in bash script

    - by Don
    Hi, The following is a fragment of a bash script that I'm running under cygwin on Windows: deployDir=/cygdrive/c/Temp/deploy timestamp=`date +%Y-%m-%d_%H:%M:%S` deployDir=${deployDir}/$timestamp if [ ! -d "$deployDir" ]; then echo "making dir $deployDir" mkdir -p $deploydir fi This produces output such as: making dir /cygdrive/c/Temp/deploy/2010-04-30_11:47:58 mkdir: missing operand Try `mkdir --help' for more information. However, if I type /cygdrive/c/Temp/deploy/2010-04-30_11:47:58 on the command-line it succeeds, why does the same command not work in the script? Thanks, Don

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  • strerror_r returns trash when I manually set errno during testing

    - by Robert S. Barnes
    During testing I have a mock object which sets errno = ETIMEDOUT; The object I'm testing sees the error and calls strerror_r to get back an error string: if (ret) { if (ret == EAI_SYSTEM) { char err[128]; strerror_r(errno, err, 128); err_string.assign(err); } else { err_string.assign(gai_strerror(ret)); } return ret; } I don't understand why strerror_r is returning trash. I even tried calling strerror_r(ETIMEDOUT, err, 128) directly and still got trash. I must be missing something. It seems I'm getting the gnu version of the function not the posix one, but that shouldn't make any difference in this case.

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  • objective c- property

    - by Amir
    Hello all , I think i am missing somthing with property attributes. first i cant understand the different between retain and assign? If i use assign does the property increase the retain counter by 1 to the setter and also to the getter, and i need to use release to both of them? and how this work with readwrite or copy? from the view of retain count. I am trying to understand when i need to use release after working with property(setter and getter) @property (readwrite,assign) int iVar; what does assing do here?? what is the different between : @property (readwrite,assign) int iVar; to @property (readwrite,retain) int iVar; to @property (readwrite) int iVar; many thanks...

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  • Grouping search results with thinking_sphinx plugin for rails

    - by Shagymoe
    I can use the following to group results, but it only returns one result per group. @results = Model.search params[:search_query], :group_by => 'created_at', :group_function => :day, :page => params[:page], :per_page => 50 So, if I display the results by day, I only get one result per day. <% @results.each_with_groupby do |result, group| %> <div class="group"><%= group %></div> <ul class="result"> <li><%= result.name %></li> </ul> <% end %> Do I have to parse the @results array and group them by date manually or am I missing something? Here is the line from the sphinx docs: http://sphinxsearch.com/docs/current.html#clustering "The final search result set then contains one best match per group."

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  • Adding Item to DataBound Drop Down List

    - by Stephen
    Yes, I have read most of the topics here, but I can't find an answer that works. I have Three drop-down lists. The first is databound to grab distinct experiment names. The user selects, page posts back, and the second drop-down menu displays distinct time points. This is where I need help. I need to add an item to THAT drop-down list whose ID, DataTextField, DataValueField are all TimePt. Seems simple, but I can't get it to work. protected void Page_Load(object sender, EventArgs e) { if (Page.IsPostBack) { TimePt.DataSource = TimePTDD; TimePt.DataValueField = "TimePt"; TimePt.DataTextField = "TimePt"; TimePt.DataBind(); TimePt.Items.Insert(0, new ListItem("--Select---", "0")); TimePt.SelectedIndex = 0; } } I'm missing sometthing.

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  • Sharing Session between webservice and asp.net application

    - by Alex Mendez
    I have an asp.net application and webservices (asmx) that reside in the same application but not in the same folder of the aspx files. I aslo have a winform application that uses the webservices. I have marked the webservice methods with [WebMethod(EnableSession = true)] but I am not able to share the same session values that are on the application in the webservices. The winform application has access to the sessionID from the application and I am using the following code Uri uri = new Uri(ServerServiceUrl); _cookieContainer = new CookieContainer(); _cookieContainer.Add(new Cookie("ASP.NET_SessionId", SessionID, "/", uri.Host)); My question is: Is there something that I am missing or doing wrong that I cannot access the application sessioin from the webservices?

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  • Removing views from UIScrollView

    - by mohan
    I have two UIScrollViews that I move images between. The user can drag and forth between the scroll views. I am trying to animate the movement of the image from one scroll view to another. In -touchesMoved (handled in my UIViewController which has two custom UIScrollViews that intercept touch and sends to my UIViewController), I am trying to set the "center" of my UIImageView that is being moved. As it is moved, the image gets hidden behind the UIScrollView and not visible. How do I make it appear on top of the UIScrollView? I am able to handle the -touchesEnded properly by animating in the destination scroll view. I am also confused about -convertPoint:fromView: usage in the iPhone Programming Guide (See Chapter 3, Event Handling). If the touch coordinates are in window coordinates, to change my view (UIImageView inside a UIScrollView which is inside a UIView and inside a window) center don't I have to use -convertPoint:toView:, i.e., imageView.center = [self.view.window convertPoint:currentTouchPosition toView:imageView]; What am I missing?

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  • Can an app use the clipboard for its own purposes? (read: who owns the clipboard?)

    - by eran
    In PowerBuilder's IDE, the code autocomplete feature uses the clipboard to communicate the completed text to the code window. By doing so, it overrides whatever was stored on the clipboard before. So, if you had the winning numbers of the next lottary stored on your clipboard, and you used the autocomplete to turn m_goodfor into m_goodfornothing, you've just lost your only chance of ever getting rich, and you're left with nothing on your clipboard. Features like that are the reason I hate software. It looks like it was implemented by some intern that noone was looking after. However, there's also a chance I got all worked up for nothing, and making such use of the clipboard is absolutely legit. So, can an app use the clipboard for its own purposes? Who is considered the owner of the clipboard? (Bonus votes to whoever puts himself in place of the feature's programmer, and provides some reasoning for this being done on purpose, assuming the users would actually benefite from it)

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  • Set window to stays always on desktop on windows7

    - by Nuno
    Hi, I'm trying to set my window a child of the desktop, and i'm doing this like this: HWND ProgmanHwnd = ::FindWindowEx( ::FindWindowEx( ::FindWindow(L"Progman", L"Program Manager"), NULL, L"SHELLDLL_DefView", L""), NULL, L"SysListView32", L"FolderView"); SetParent(m_hWnd, ProgmanHwnd); This works fine in windowsXP, my window is underneath all windows and when i press the "show desktop" option the window shows and all other "normal" windows are hide. But in Win7 when i do the above code the same window is not displayed, in spy++ i can see that my window is a child window of the SysListView32 but it not display (and it has the WM_VISIBLE style)? What i'm missing? or what changed from winXP to win7? how can i do this to work on win7? Update: It's got something to do with aero theme, because if i change the desktop theme to the basic then the window is displayed, but if i switch back to one of the aero theme then is hided again. Thanks

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  • Incongruity between Eclipse Outline/Package perspective and source code being displayed - Java error generated at runtime

    - by David Daedalus
    I've been debugging a Java application and have encountered something odd. When a particular method is called, Java throws a ClassNotFoundException. Unfortunately, the methods in question (the invoking and the 'missing' one) are inside a JAR file for which I have no documentation or source. To get at the source, I used JD-GUI (a Java JAR reverse engineer-er) and the JD plugin for Eclipse. As far as I can tell, the class in question exists inside the JAR file. This because JD-GUI displays it inside the JAR, and from within Eclipse I can see it listed along with the constructors and methods. My question is why the source being displayed in Eclipse is for a different class (that also exists)? This program was built with Ant - is it possible the problem lies there? Screenshot below for your viewing pleasure - and thanks in advance for your help!

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  • Using NSURLRequest+NSURLConnection seems overkill for a webcall with no data return

    - by Spectravideo328
    All, This might seems very straightforward but I have already gone through the URL loading system program guide and the various NSURL.... classes and not found my answer. I am just trying to do a simple call from the app to a website to reserve a party spot: NSString *path=[NSString stringWithFormat:@"http://www.myparty123.com/ireservedURL.asp?Nickname=%@&Seat=%i&Email=%@&Currentparty=%i",john,5432,[email protected],6598]; NSURL* reservationURL =[NSURL URLWithString:path]; NSData *call= [NSData dataWithContentsOfURL:reservationURL]; This seemed to be the simple way but I get this warning that I am not using the "call" variable. And it seems overkill to do a call using NSData where there is no data return. Yet, creating an NSURLRequest and initiating an NSURLConnection and then implementing delegates with that request seems to be overkill as well. What am I missing. Thanks KMB

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  • nhibernate webforms with class library

    - by frosty
    very new to nhibernate. I'm a little confused on where features should live. I have the following solution 1) MyProject.Web ( web forms application) 2) MyProject.Domain( class lib) - nhibernate.config - product.hbm.xml So is it correct I should put the following method in a IHttpModule? ( i can't use a global asax as it's use by the CMS i'm running ) Where should the connectionString live? HTTPModule in web forms application private static ISessionFactory CreateSessionFactory() { var cfg = new Configuration().Configure(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "nhibernate.config")); cfg.SetProperty(NHibernate.Cfg.Environment.ConnectionStringName, System.Environment.MachineName); NHibernateProfiler.Initialize(); return cfg.BuildSessionFactory(); } nhibernate.config <?xml version="1.0" encoding="utf-8" ?> NHibernate.Dialect.MsSql2005Dialect NHibernate.Connection.DriverConnectionProvider NHibernate.Driver.SqlClientDriver 16 web NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle enter code here

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  • Rails flash hash violation of MVC?

    - by user94154
    I know Rails' flash hash is nothing new, but I keep running into the same problem with it. Controllers should be for business logic and db queries, not formatting strings for display to the user. But the flash hash is always set in the controller. This means that I need to hack and work around Rails to use Helpers that I made to format strings for the flash hash. Is this just a pragmatic compromise to MVC or am I missing something here? How do you deal with this problem? Or do you not even see it as one?

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  • How to do call function after client finishes download from tornado web server?

    - by Shabbyrobe
    I would like to be able to run some cleanup functions if and only if the client successfully completes the download of a file I'm serving using Tornado. I installed the firefox throttle tool and had it slow the connection down to dialup speed and installed this handler to generate a bunch of rubbish random text: class CrapHandler(BaseHandler): def get(self, token): crap = ''.join(random.choice(string.ascii_uppercase + string.digits) for x in range(100000)) self.write(crap) print "done" I get the following output from tornado immediately after making the request: done I 100524 19:45:45 web:772] 200 GET /123 (192.168.45.108) 195.10ms The client then plods along downloading for about 20 seconds. I expected that it would print "done" after the client was done. Also, if I do the following I get pretty much the same result: class CrapHandler(BaseHandler): @tornado.web.asynchronous def get(self, token): crap = ''.join(random.choice(string.ascii_uppercase + string.digits) for x in range(100000)) self.write(crap) self.finish() print "done" Am I missing something fundamental here? Can tornado even support what I'm trying to do? If not, is there an alternative that does?

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