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• Generate CSV file from rails

  - by Elliot

  I've been reading similar questions, but many of the answers are outdated or not clear enough for me. I'd like to be able to just do something like (in a controller action): respond_to do |format| format.html format.csv end I know I'd then need a view such as action.csv.erb So my questions are: 1) What do I need to configure in rails to allow this to happen in general. 2) How should I setup the CSV view to display some basic fields from a model?

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• hibernate query cache specify cache duration

  - by cometta

  below is how i do query cache getHibernateTemplate().setCacheQueries(true); List<IssSection> result = (List<IssSection>) getHibernateTemplate().findByCriteria(crit); getHibernateTemplate().setCacheQueries(false); may i know how to specify duration of maximum time to cache this method? let say i want to clear cache after 5 mins expirated

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• RadGrid Dynamic CheckBoxList on Edit

  - by Kobojunkie

  I have a situation where I need to, when in Radgrid Edit Mode and user makes a selection on a contained dropdownlist, display a modalPopup containing a Checkboxlist populated with data that relates to dropdownlist selection. When Selections are made on the checkboxlist, and OK button clicked, I want to return to the RadGrid Edit template, and populate a textbox in the template with the checkbox selected information. Anyone have a clear idea of how I ought to handle this. An example will be greatly appreciated please.

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• How to group a serial of objects according to timestamp

  - by Benny

  I have a serial of object defined as: public class Foo { public DateTime Time {get;set;} } now I want to group objects(IEnumerable<Foo>) according to the time, e.g. I want to group them according to hour or day or month. for example (group into hour): group 1(13:00-14:00) : foo1, foo2, foo3 group 2(14:00-15:00): foo4, foo5 How to write LINQ? hope I made myself clear.

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• There should be reason when a person mark a question useful or not useful [closed]

  - by Asim Sajjad

  I want to put my suggestion here and what to know your thoughts what you think about it. I have see many question marks as not useful and unclear or a question is useful and clear. But I want if someone mark it useful or not useful the he/she should be ask to give reason of his/her think of useful or not useful of question ?

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• Floats in CSS - Gap/space left on top when floated to the right?

  - by bobthabuilda

  This is a little difficult to describe, but basically there is undesired space left by a floated div on my page. Here are pictures describing the problem. The black boxes are divs. Before floating: After floating: Desired effect: And I'm not sure if it makes a difference, but I also have an empty div with "clear: both" placed immediately after the floated div. How can I achieve this?

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• What is major Difference between Adobe Flex and Microsoft Silverlight?

  - by Piyush Vishvas

  I want to develop a web Application to manage school administration. But I am not clear, which technology should I use to create Rich Internet Application. At present, develeopment company is going with ASP.net tools and say this is a web app. However, there is page refresh on every click. Which I don't like. Please suggest, where to proceed. Regards Piyush

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• Problem with LINQ Generated class and IEnumerable to Excel

  - by mehmet6parmak

  Hi all, I wrote a method which exports values to excel file from an IEnumerable parameter. Method worked fine for my little test class and i was happy till i test my method with a LINQ class. Method: public static void IEnumerableToExcel<T>(IEnumerable<T> data, HttpResponse Response) { Response.Clear(); Response.ContentEncoding = System.Text.Encoding.Default; Response.Charset = "windows-1254"; // set MIME type to be Excel file. Response.ContentType = "application/vnd.ms-excel;charset=windows-1254"; // add a header to response to force download (specifying filename) Response.AddHeader("Content-Disposition", "attachment;filename=\"ResultFile.xls\""); Type typeOfT = typeof(T); List<string> result = new List<string>(); FieldInfo[] fields = typeOfT.GetFields(); foreach (FieldInfo info in fields) { result.Add(info.Name); } Response.Write(String.Join("\t", result.ToArray()) + "\n"); foreach (T t in data) { result.Clear(); foreach (FieldInfo f in fields) result.Add((typeOfT).GetField(f.Name).GetValue(t).ToString()); Response.Write(String.Join("\t", result.ToArray()) + "\n"); } Response.End(); } My Little Test Class: public class Mehmet { public string FirstName; public string LastName; } Two Usage: Success: Mehmet newMehmet = new Mehmet(); newMehmet.FirstName = "Mehmet"; newMehmet.LastName = "Altiparmak"; List<Mehmet> list = new List<Mehmet>(); list.Add(newMehmet); DeveloperUtility.Export.IEnumerableToExcel<Mehmet>(list, Response); Fail: ExtranetDataContext db = new ExtranetDataContext(); DeveloperUtility.Export.IEnumerableToExcel<User>(db.Users, Response); Fail Reason: When the code reaches the code block used to get the fields of the template(T), it can not find any field for the LINQ Generated User class. For my weird class it works fine. Why? Thanks...

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• Aspect oriented Programming?

  - by Jaswant Agarwal

  How can we apply attributes to class fucntion using AOP in C#? UPDATE: I am slightly not clear in what context AOP should be used? As we can use AOP for logging purpose, security(Authentication), please suggest some other scenarios where we can take benefit of AOP Is AOP can be use to share data among different running threads in application process?

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• how to connect to ethernet printer throught python?

  - by Prasanth

  How can i connect and send data to a Ethernet receipt printer Epson-T88V through python2.7, i have set the ipaddress of the Ethernet printer manually and the utility software communication is also successful. How do i detect and connect to these printers and send data to print. Is there and module for Ethernet connection in python. Using more than one Ethernet printer and separate data to be printed simultaneously from a single system, i am using windows xp and python 2.7 hope i am clear Thanks.

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• Stack overflow code golf

  - by Chris Jester-Young

  To commemorate the public launch of Stack Overflow, what's the shortest code to cause a stack overflow? Any language welcome. ETA: Just to be clear on this question, seeing as I'm an occasional Scheme user: tail-call "recursion" is really iteration, and any solution which can be converted to an iterative solution relatively trivially by a decent compiler won't be counted. :-P ETA2: I've now selected a “best answer”; see this post for rationale. Thanks to everyone who contributed! :-)

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• [Python] How to use re match objects in a list comprehension

  - by Brent.Longborough

  I have a function to pick out lumps from a list of strings and return them as another list: def filterPick(lines,regex): result = [] for l in lines: match = re.search(regex,l) if match: result += [match.group(1)] return result Is there a way to reformulate this as a list comprehension? Obviously it's fairly clear as is; just curious.

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• How do I turn off bullets in NSSecureTextField?

  - by Mike

  I have a password dialog that uses NSSecureTextField and I want to include a "Show password" checkbox so I can show the password being typed in clear text.

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• Good Domain Driven Design samples

  - by jlembke

  I'm learning about DDD and enjoying every minute of it. However, there are some practical issues that are confusing to me that I think seeing some good samples might clear up. So being at peace with those issues, does anyone know of some good working code samples that do a good job of modeling basic DDD concepts? Particularly interested in An illustrative Domain Model Repositories Use of Domain/Application Services Value Objects Aggregate Roots I know I'm probably asking for too much, but anything close will help.

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• ASP.NET csv excel issue with strange characters

  - by cfdev9

  I'm exporting a table of data to csv format, eg "COL1","COL2","COL3" "1","some text", "£232.00" "2","some more text", "£111.00" "3","other text", "£2.00" The code to export is fairly simple using an ashx handler context.Response.Clear() context.Response.ContentType = "text/csv" context.Response.AddHeader("Content-disposition", "attachment;filename=data.csv") context.Response.AddHeader("Cache-Control", "must-revalidate") context.Response.AddHeader("Pragma", "must-revalidate") context.Response.Write(data) context.Response.Flush() context.Response.End() My issue is when excel trys to open the exported file the character  appears before all £ signs, eg £232.00 when the value should be £232.00

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• What is instrumentation?

  - by Jon Seigel

  I've heard this term used a lot in the same context as logging, but I can't seem to find a clear definition of what it actually is. Is it simply a more general class of logging/monitoring tools and activities? Please provide sample code/scenarios when/how instrumentation should be used.

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• Creating child within xml file.

  - by Kaloyan

  Hey, guys. I want to ask if someone can give me an example of creating child through xml. I mean creating custom components through xml (for every xml tag you create your own custom component and then add it as a child to the stage). I hope is it clear enough... :)

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• How do you unbind variables in an interactive Erlang session?

  - by Torbjørn

  In the Erlang interactive shell you can bind variables to values. If I would like to clear everything and start from scratch without exiting the session and starting a new one, how do I do that? And if I just wanted to re-use a single variable, is it possible to re-bind?

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• rails when to use self.

  - by fenec

  i am developing a rails application and would like to understand when do we use self.for . here is the code of a method that i would like to fully understand.if it is possible i would like to have an alternative to this code so it would make things more clear. enter code here def self.for(facebook_id) User.create_by_facebook_id(facebook_id) end

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• iPhone UIWebView epubs split page by page

  - by imozil

  It's really interesting how book reading applications like Stanza or Eucalyptus split epubs which is html by page so lines are clear and next page starts at the correct line. Does anyone has any idea how this could be accomplished?

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• copy array from one class to another class array

  - by shishir.bobby

  hi all, i hv an array ("array A", which contains 3 objects, fox ex, to,from,message) in class "A". and in class "B",i m having another array ("array B"),which fills tableview,of class "B" only. i need to fill tableview,with the values of class A's array (i.e array A,with the object values, to,from,message). how can i do it?? how to copy array from another class ? i hope i m clear with my question regards shishir

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• c# save images in webbrowser control without redownloading them from internet

  - by lebhero

  Hi ... is it possible to save images in a webbroswer control directly to harddisk, without needing to download them again from the internet ? lets say i navigate to a website, that has 15images, they are all viewed in my webbrowser, but how can i save them now without the need to download them? hope my question is clear thanks in advance

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• Iframe vs dynamically loading web user controls

  - by kevin

  I need some advice on techniques to perform page redirect in asp.net. Which one is more recommended to use in asp.net? Dynamically changed the src of the Iframe to difference aspx. Dim frame As HtmlControl = CType(Me.FindControl("frameMain"), HtmlControl) frame.Attributes("src") = "page1.aspx" Dynamically load web user controls to an asp:panel. panelMain.Controls.Clear() panelMain.Controls.Add(LoadControl("WebControl/page1.ascx")) (convert all aspx page to web user controls)

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• please give guidence on making a social networking website

  - by user287745

  what is an api, if a make a db and a social site in asp.net and c#, sql host it. how can i ask others to make applications for it? i mean how is that possible, i have the code, so API, is it a software? i want to make a site like facebook social networking site, but its proving to be very very difficult, Ajax java script and all that please help by providing examples, codes, readable, guidance, thank you, i has asked a similar question but deleted it as it was not clear thank you

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• Strange declaration(templates). C++

  - by atch

  Hi, guys could anyone explain to my like to a not very inteligent child what is declared here: (this is taken from another post on this forum) template<typename C> static char (&f(ChT<int Fallback::*, &C::x>*))[1]; how I read it is: template of static function f called with (ChT*) but then I can't make sense why is there address of operator and why is there array? When explaining please picture not very inteligent child and then try to make it clear to it. Thanks for any help

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