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  • Rails: Easiest way to provide file downloads?

    - by Schroedinger
    G'day guys, currently have almost finished writing a rails application that allows a CSV download of the database. This is generated when the index is first viewed. Is there an easy way to insert a link to a helper that returns a CSV document? That is to say is it easy to insert links to helpers? This would make a lot of problems I've been having much easier

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  • my layout breaks in IE7 and javascript page reloads make the screen blink

    - by chibineku
    My layout breaks if I change the window size in IE7/AOL, so I added a simple javascript function that fires on window.onresize, but no matter how I change the location I get problems. It was suggested I post a link and here it is: link text I already use PHP to detect browser and include an IE7-only inline stylesheet (and for mobile browsers), and my page looks nearly identical to the way it does in FF, Opera, Chrome, Safari and IE8, but when I change the window size, some things go wonky, and come back into line if you refresh. Any advice is welcome :)

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  • I'm trying to ressurrect UnderC C/C++ interpreter [closed]

    - by Domingo
    Hello ! I'm trying to ressurrect UnderC C/C++ interpreter https://code.google.com/p/underc-fltk/ and I got it to compile with modern mingw compilers 3.4.5 and up, I need some experts advice on some topics: -Yacc/Bison grammar (example some problems with recognizing "unsigned" alone and "friend class") -ARM assembler only one function to call native os functions (X86 already there for windows and linux) -General improvements I expect it to work on WINCE, IPHONE, SYMBIAN in the near future. Thanks in advance for your expertize, time and attention !

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  • Alternative for PHP mail

    - by Robbert Dam
    In relation to an earlier question I'm looking for an alternative way to send an order from my website to the division in my company that processes the order. Currently I use PHP mail(), but frequently this gives problems. Big delays occur. Are there alternatives to PHP mail() that pushes the order to my company? So I prefer not to poll the website.

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  • scraping blog contents

    - by goh
    Hi lads, After obtaining the urls for various blogspots, tumblr and wordpress pages, I faced some problems processing the html pages. The thing is, i wish to distinguish between the content,title and date for each blog post. I might be able to get the date through regex, but there are so many custom scripts people are using now that the html classes and structure is so different. Does anyone has a solution that may help?

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  • Trouble with ASP.NET MVC auto-scaffolder template

    - by DanM
    I'm trying to write an auto-scaffolder template for Index views. I'd like to be able to pass in a collection of models or view-models (e.g., IQueryable<MyViewModel>) and get back an HTML table that uses the DisplayName attribute for the headings (th elements) and Html.Display(propertyName) for the cells (td elements). Each row should correspond to one item in the collection. Here's what I have so far: <%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %> <% var items = (IQueryable<TestProj.ViewModels.TestViewModel>)Model; // How do I make this generic? var properties = items.First().GetMetadata().Properties .Where(pm => pm.ShowForDisplay && !ViewData.TemplateInfo.Visited(pm)); %> <table> <tr> <% foreach(var property in properties) { %> <th> <%= property.DisplayName %> </th> <% } %> </tr> <% foreach(var item in items) { HtmlHelper itemHtml = ????; // What should I put in place of "????"? %> <tr> <% foreach(var property in properties) { %> <td> <%= itemHtml.Display(property.DisplayName) %> </td> <% } %> </tr> <% } %> </table> Two problems with this: I'd like it to be generic. So, I'd like to replace var items = (IQueryable<TestProj.ViewModels.TestViewModel>)Model; with var items = (IQueryable<T>)Model; or something to that effect. A property Html is automatically created for me when the view is created, but this HtmlHelper applies to the whole collection. I need to somehow create an itemHtml object that applies just to the current item in the foreach loop. I'm not sure how to do this, however, because the constructors for HtmlHelper don't take a Model object. How do I solve these two problems?

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  • C vs. C++ for performance in memory allocation

    - by Andrei
    Hi, I am planning to participate in development of a code written in C language for Monte Carlo analysis of complex problems. This codes allocates huge data arrays in memory to speed up its performance, therefore the author of the code has chosen C instead of C++ claiming that one can make faster and more reliable (concerning memory leaks) code with C. Do you agree with that? What would be your choice, if you need to store 4-16 Gb of data arrays in memory during calculation?

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  • Can processor cores thrash each other's caches?

    - by Jørgen Fogh
    If more than one core on a processor is accessing the same memory address, will they thrash each other's caches or will some snooping protocol allow each to keep the data in L1-cache? I am interested in a general answer as well as answers for specific processors. How many layers of cache are invalidated? Will accessing another address within the same cache-line invalidate the entire line? What can you do to alleviate these problems?

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  • Correct way to read configuration file and using configuration values

    - by Harza
    I'm reading applications .config file using .NET ConfigurationManager like it should be done, but .... Which one is most preferred option: Read config and store instance of (build in or custom) ConfigurationElement for later use Read config and store only needed values (but not instances of ConfigrationElement classes) for later use Read ConfigurationElement from config always when configuration values are needed These two things are in my mind: Performance impact in case 3 when reading config all the time Problems occuring in case 1 when using cached instances of ConfigurationElements

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  • Why isn't LISP more widely used?

    - by Chris
    I've heard a lot of people espouse the capabilities of LISP and its omnipotent macros. If LISP is such a great language, why isn't it being adopted more? What problems is LISP facing that is holding it back from (re)emerging as popular language? Is it something about LISP itself ("those brackets!" isn't the answer, is it?!), or its competitors (e.g. the dominance of Java, .NET)?

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  • Can we still develop Silverlight 2 applications

    - by TobyEvans
    Hi there, I've inherited a set of Silverlight 2 applications (new job), one of which needs upgrading. We can do the updates in code without problems, but the available dev machines all appear to be running Silverlight 3. I can't seem to find Silverlight 2 tools for download any more - is there a way to multi-target Silverlight the same way we can multi-target older versions of the main CLR? thanks Toby

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  • Eclipse: Should I create a workspace for each project ?

    - by Zombies
    I am simply wondering whether it is best to put all of my Eclipse projects into one workspace, or do a 1 workspace per 1 project. I am just a solo developer, for hobby more or less, but the apps I create do actually have production versions that are running on rather frequent cron jobs, so its almost like an amateur production environment. The only problems I have noticed so far is for exporting JARs, I have the potential to include source files from other projects which seems like it could get messy (maybe?).

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  • not able to solve markup problem

    - by pradeep
    http://validator.w3.org/check?uri=http%3A%2F%2Fratingscorner.com%2Fproduct_rating.php%3Falias%3DPeoples-Education-Society-Institute-of-Technology-%28PESIT%29-100-feet-Ring-Road-Bangalore%26product%3DColleges&charset=%28detect+automatically%29&doctype=Inline&ss=1&outline=1&group=1&No200=1&verbose=1&st=1&user-agent=W3C_Validator%2F1.767 have fixed most of the errors . but could not fix the » problems ...if any1 can help it will be helpful for me.

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  • Can I customize the Magento app/code/core folder without affecting future upgrades?

    - by mck89
    I found a guide on how to add new attributes to users, it explains that for this operation I must modify some files in the app / code / core / Mage directory (the directory that contains Magento’s modules). But if i make some changes in that folder will this affect future upgrades? Will an upgrade will delete my changes? Should I limit the changes only to my modules to not have problems with updates?

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  • ASP.NET Performance, 100 "Memory Hard Faults" indiciate a memory swapping problem?

    - by Robert
    With a customer web site we currently experiences performance problems. While analyzing the problem we found an unexpected amount of of 112 "Memory Hard Faults" per minute. Does anybody can interpret the meaning of this value? Does this happen, when memory swapping is necessary - so the root cause is not sufficient memory? Even if the CPU value seems high, it is not the main problem for the slow web site. Do you agree?

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  • Hidden features of Emacs Lisp?

    - by anon
    What are some features of Emacs Lisp that you use to solve real problems? One feature per answer Give an example and short description of the feature, not just a link to documentation Label the feature using bold title as the first line See also: Hidden features of Python Hidden features of Ruby Hidden features of Perl Hidden features of Java

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  • Good TFS Hosting Provider

    - by JonnyD
    I'm looking for a good 3rd party host for Team Foundation Server. Have any of you had good or bad experiences in the past? Will be working on a small .NET project with several other guys in different locations. Are there any performance problems or any other "gotchas" with 3rd party hosting?

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  • Issues in Ajax based applications

    - by Sinuhe
    I'm very interested in developing Ajax based applications. This is, loading almost all of the content of the application via XMLHttpRequest, instead of only some combos and widgets. But if I try to do this form scratch, soon I find some problems without an easy solution. I wonder if there is some framework (both client and server side) to deal with this issues. As far as I know, there isn't (but I've searched mainly in Java world). So I am seriously thinking of doing my own framework, at least for my projects. Therefore, in this question I ask for several things. First, the possible problems of an ajax based development. Then, I'm looking for some framework or utility in order to deal with them. Finally, if there is no framework available, what features must it have. Here are the issues I thought: 1 - JavaScript must be enabled. Security paranoia isn't the only problem: a lot of mobile devices couldn't use the application, too. 2 - Sometimes you need to update more than one DIV (e.g. main content, menu and breadcrumbs). 3 - Unknown response type: when you make an Ajax call, you set the callback function too, usually specifying if expected response is a javascript object or in which DIV put the result. But this fails when you get another type of response: for example when the session has expired and the user must log in again. 4 - Browser's refresh, back and forward buttons can be a real pain. User will expect different behaviors depending on the situation. 5 - When search engines indexes a site, only follow links. Thus, content load by Ajax won't "exist" for who doesn't know about it yet. 6 - Users can ask for open a link in a different window/tab. 7 - Address bar doesn't show the "real" page you are in. So, you can't copy the location and send it to a friend or bookmark the page. 8 - If you want to monetize the site, you can put some advertisings. As you don't refresh entire page and you want to change the ad after some time, you have to refresh only the DIV where the ad is. But this can violate the Terms and Conditions of your ad service. In fact, it can go against AdSense TOS. 9 - When you refresh an entire page, all JavaScript gets "cleaned". But in Ajax calls, all JavaScript objects will remain. 10 - You can't easily change your CSS properties.

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  • Making "helper" text in a form be a different color then typed text.

    - by aslum
    <input name="phone" type="text" id="phone" value="Phone #" onfocus="value=''"> I've got two problems here. The main one is I would like the helper text (in this case "Phone Number") to be a different color then the inputted text from the user, to make it easier for the user to differentiate between filled and unfilled fields. The second is that with this methodology (onfocus="value''") if you mistype something in a field and come back to it you have to retype the whole thing which isn't really acceptable.

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  • similar to __asm int 3 in Max OS X/ Xcode?

    - by Mark
    Hi, When using visual studio to develop c++ applications, I used to write _asm int 3; and then build the application. When the application is executed, if the code path that has "_asm int 3" is encountered Visual Studio Debugger used to get lauched and I could debug the problems. Is there any similar approach when developing using Xcode on Mac OS X? Thanks a lot. Mark

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  • GA Framework for Virtual Machines

    - by PeanutPower
    Does anyone know of any .NET genetic algorithm frameworks for evolving instructions sets in virtual machines to solve abstract problems? I would be particularly interested in a framework which allows virtual machines to self propagate within a pool and evolve against a fitness function determined by a data set with "good" outputs given expected inputs.

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  • Rails callback for the equivalent of "after_new"

    - by Joe Cairns
    Right now I cant find a way to generate a callback between lines 1 and 2 here: f = Foo.new f.some_call f.save! Is there any way to simulate what would be effectively an after_new callback? Right now I'm using after_initialize but there are potential performance problems with using that since it fires for a lot of different events.

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