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  • How do I do automatic data serialization of data objects in Haskell

    - by Adam Gent
    One of the huge benefits in languages that have some sort of reflection/introspecition is that objects can be automatically constructed from a variety of sources. For example in Java I can use the same objects for persisting to a db (with Hibernate) serializing to XML (with JAXB) or serializing to JSON (json-lib). You can do the same in Ruby and Python also usually following some simple rules for properties or annotations for Java. Thus I don't need lots "Domain Transfer Objects". I can concentrate on the domain I am working in. It seems in very strict FP like Haskell and Ocaml this is not possible. Particularly Haskell. The only thing I have seen is doing some sort of preprocessing or meta-programming (ocaml). Is it just accepted that you have to do all the transformations from the bottom upwards? In other words you have to do lot of boring work to turn a data type in haskell into JSON/XML/DB Row object and back again into a data object.

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  • Alpha blending colors in .NET Compact Framwork 2.0

    - by Adam Haile
    In the Full .NET framework you can use the Color.FromArgb() method to create a new color with alpha blending, like this: Color blended = Color.FromArgb(alpha, color); or Color blended = Color.FromArgb(alpha, red, green , blue); However in the Compact Framework (2.0 specifically), neither of those prototypes are valid, you only get: Color.FromArgb(int red, int green, int blue); and Color.FromArgb(int val); The first one, obviously, doesn't even let you enter an alpha value, but the documentation for the latter shows that "val" is a 32bit ARGB value (as 0xAARRGGBB as opposed to the standard 24bit 0xRRGGBB), so it would make sense that you could just build the ARGB value and pass it to the function. I tried this with the following: private Color FromARGB(byte alpha, byte red, byte green, byte blue) { int val = (alpha << 24) | (red << 16) | (green << 8) | blue; return Color.FromArgb(val); } But no matter what I do, the alpha blending never works, the resulting color always as full opacity, even when setting the alpha value to 0. Has anyone gotten this to work on Compact Framework?

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  • Int128 in .Net?

    - by Adam Tegen
    I need to do some large integer math. Are there any classes or structs out there that represent a 128-bit integer and implement all of the usual operators? BTW, I realize that decimal can be used to represent a 96-bit int.

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  • Multithreading Errors in C#

    - by Adam
    Hi. I am trying to update a text box. I thought my threading code would fix the problem, but it does not. Can anyone help with this? new Thread((ThreadStart)delegate { txtCapacitance.Text = Math.Round(capacitance, 3).ToString(); }).Start(); Gives the following error: Cross-thread operation not valid: Control 'txtCapacitance' accessed from a thread other than the thread it was created on. Note that all this is being started by a dataReceived function which is called whenever USB data is received.

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  • Returning the value of an identity column during/after SQL INSERT command

    - by Adam Kane
    Using VS 2010, with ASP.NET, and .NET 3.0, and C#... When I use a System.Web.UI.WebControls.SqlDataSource and call its Insert() method to insert a new row, and that table has an identity column, I'd like my method to return the value of that column. For example, in my SQL 2005 table, I've got: Customer.Id Customer.FirstName Customer.LastName Where Customer.Id is an identity colum. When I call my method InsertNewCustomerRecord( "John", "Smith" ), I'd like to be able to return the Customer.Id that gets automatically generated in the database. Sorry for such a roughly posed question. Let me know if I can add better detail. Thanks.

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  • Simplifying Testing through design considerations while utilizing dependency injection

    - by Adam Driscoll
    We are a few months into a green-field project to rework the Logic and Business layers of our product. By utilizing MEF (dependency injection) we have achieved high levels of code coverage and I believe that we have a pretty solid product. As we have been working through some of the more complex logic I have found it increasingly difficult to unit test. We are utilizing the CompositionContainer to query for types required by these complex algorithms. My unit tests are sometimes difficult to follow due to the lengthy mock object setup process that must take place, just right, to allow for certain circumstances to be verified. My unit tests often take me longer to write than the code that I'm trying to test. I realize this is not only an issue with dependency injection but with design as a whole. Is poor method design or lack of composition to blame for my overly complex tests? I've tried base classing tests, creating commonly used mock objects and ensuring that I utilize the container as much as possible to ease this issue but my tests always end up quite complex and hard to debug. What are some tips that you've seen to keep such tests concise, readable, and effective?

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  • How can I get 'git status' to always use short format?

    - by Adam Lindberg
    I'd like git status to always use the short format: $ git status --short M src/meck.erl M test/meck_tests.erl ?? erl_crash.dump ?? meck_test_module.coverdata There does not seem to exist a configuration option for this, and git config --global alias.status "status --short" does not work. I haven't managed to create and alias in zsh either. How can I make git status to use the short format by default.

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  • Twitter + OAuth Problem -- Cancel Button

    - by Adam Storr
    Hi everyone, I'm implementing OAuth to post on Twitter... which works perfectly. My issue is for those who entered the Twitter login area by accident and want to press the "Cancel" button. Unfortunately, the "Cancel" button is dismissed but then immediately reappears. Here is the code for the "Cancel" button: - (void)cancel:(id)sender { if ([_delegate respondsToSelector: @selector(OAuthTwitterControllerCanceled:)]) [_delegate OAuthTwitterControllerCanceled: self]; [self performSelector: @selector(dismissModalViewControllerAnimated:) withObject: (id) kCFBooleanTrue afterDelay: 0.0]; } I think what I need to do is put the right code in the viewDidDisappear area... the problem is I don't know what code to put in. Any help would be great! Thanks so much!

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  • SEO for Ultraseek 5.7

    - by Adam N
    We've got Ultraseek 5.7 indexing the content on our corporate intranet site, and we'd like to make sure our web pages are being optimized for it. Which SEO techniques are useful for Ultraseek, and where can I find documentation about these features? Features I've considered implementing: Make the title and first H1 contain the most valuable information about the page Implement a sitemap.xml file Ping the Ultraseek xpa interface when new content is added Use "SEO-Friendly" URL strings Add Meta keywords to the HTML pages.

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  • Single page Web App in Java framework or examples?

    - by Adam Gent
    Has anyone seen an example or done the following in Java: http://duganchen.ca/single-page-web-app-architecture-done-right/ That is a design a single page web app that will work with Google SEO with out massive violation of DRY using Java technologies? It doesn't seem terrible hard to do this on my own but I was curious (and lazy) to see if someone had already done it with either Spring or JAX-RS.

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  • Why does this crash?

    - by Adam Driscoll
    I've been banging my head...I can't pretend to be a C++ guy... TCHAR * pszUserName = userName.GetBuffer(); SID sid; SecureZeroMemory(&sid, sizeof(sid)); SID_NAME_USE sidNameUse; DWORD cbSid = sizeof(sid); pLog->Log(_T("Getting the SID for user [%s]"), 1, userName); if (!LookupAccountName(NULL, (LPSTR)pszUserName, &sid, &cbSid, NULL, 0, &sidNameUse)) { pLog->Log(_T("Failed to look up user SID. Error code: %d"),1, GetLastError()); return _T(""); } pLog->Log(_T("Converting binary SID to string SID")); The message 'Getting the SID for user [x] is written' but then the app crashes. I'm assuming is was the LookupAccountName call. EDIT: Whoops userName is a MFC CString

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  • Rails - Cant get http_accept_language gem to work in my rails project

    - by adam
    I'm internationalizing my app and I've installed the http_accept_language gem on my system I've placed config.gem 'http_accept_language' into my environment.rb file but every time I try to run this code in my controller request.user_preferred_languages it complains of no method error. There are no other instructions on the readme on github... am I missing something? EDIT - Problem solved. after a good nights sleep I came back and realised I hadnt restarted the server. I hate it when that happens.

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  • How small is *too small* for an opensource project?

    - by Adam Lewis
    I have a fair number of smaller projects / libraries that I have been using over the past 2 years. I am thinking about moving them to Google Code to make it easier to share with co-workers and easier to import them into new projects on my own environments. The are things like a simple FSMs, CAN (Controller Area Network) drivers, and GPIB drivers. Most of them are small (less than 500 lines), so it makes me wonder are these types of things too small for a stand alone open-source project? Note that I would like to make it opensource because it does not give me, or my company, any real advantage.

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  • Display a MYSQL field using CAKE

    - by adam
    Forgive me if this is a "homework" question. We have a "Rating" table in our mysql db. I want to display this number on our user profile page. JUST BELOW THE GRAVATAR. here is the code in app/views/user/view.ctp <div class="nhplft"> flash(); ? ?d=identicon&s=100" border="0" alt="My Avatar! UID:" / Change Image link("Home",'/items'); ?  |  link('Add',array('controller' = 'items','action'='add')); ?  |  link('Search',array('controller'='items','action'='index')); ?  |  link("Logout",'/users/logout'); } ?

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  • What is the best way to limit text input entry to numbers, lowercase letters, and certain symbols?

    - by Adam Maras
    Without using jQuery, what is the best way to limit text entry of a textbox to numbers, lowercase letters and a given set of symbols (for example - and _)? If the user enters an uppercase letter, I would like it to be automatically converted to a lowercase letter, and if the user enters a symbol not within the given set, I would like to be able to instantly show a validation error (show some element adjacent to or below the text box). What's the cleanest cross-browser way of doing this without the aid of jQuery?

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  • Rails - Seeking a Dry authorization method compatible with various nested resources

    - by adam
    Consensus is you shouldn't nest resources deeper than 1 level. So if I have 3 models like this (below is just a hypothetical situation) User has_many Houses has_many Tenants and to abide by the above i do map.resources :users, :has_many => :houses map.resorces :houses, :has_many => :tenants Now I want the user to be able edit both their houses and their tenants details but I want to prevent them from trying to edit another users houses and tenants by forging the user_id part of the urls. So I create a before_filter like this def prevent_user_acting_as_other_user if User.find_by_id(params[:user_id]) != current_user() @current_user_session.destroy flash[:error] = "Stop screwing around wiseguy" redirect_to login_url() return end end for houses that's easy because the user_id is passed via edit_user_house_path(@user, @house) but in the tenents case tenant house_tenent_path(@house) no user id is passed. But I can get the user id by doing @house.user.id but then id have to change the code above to this. def prevent_user_acting_as_other_user if params[:user_id] @user = User.find(params[:user_id] elsif params[:house_id] @user = House.find(params[:house_id]).user end if @user != current_user() #kick em out end end It does the job, but I'm wondering if there is a more elegant way. Every time I add a new resource that needs protecting from user forgery Ill have to keep adding conditionals. I don't think there will be many cases but would like to know a better approach if one exists.

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  • XmlDocument.InnerXml is null, but InnerText is not

    - by Adam Neal
    I'm using XmlDocument and XmlElement to build a simple (but large) XML document that looks something like: <Widgets> <Widget> <Stuff>foo</Stuff> <MoreStuff>bar</MoreStuff>...lots more child nodes </Widget> <Widget>...lots more Widget nodes </Widgets> My problem is that when I'm done building the XML, the XmlDocument.InnerXml is null, but the InnerText still shows all the text of all the child nodes. Has anyone ever seen a problem like this before? What kind of input data would cause these symptoms? I expected the XmlDocument to just throw an exception if it was given bad data. Note: I'm pretty sure this is related to the input data as I can only reproduce it against certain data sets. I also tried escaping the data with SecurityElement.Escape but it made no difference.

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  • XNA Music mixing real-time

    - by Adam L. S.
    I've created a "format" to store segments of music (prelude part, repeated part, ending part) and time information for these segments (offset, scored length) so I can mix it up in real-time as if it were one piece of music, while repeating the repeated part (optionally) indefinitely. This way, the segments can store decay where the next segment is played, while the previous one is finished. (I've created a player for this in Java, and used the Clip class.) I wanted this format, so I can provide a finite length music (for a jukebox feature), while I play infinite length music in-games. However, when I wanted to code a class in XNA that manages this "format" I've noticed, that there is no obvious way to play "Songs" simultaneously/overlapped. How can I do this/what is the best practice, not leaving the XNA framework? (I don't want to create infinite play-lists.)

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  • Character Set Issues when Upgrading from Symfony 2.0.* to Symfony 2.1.*?

    - by Adam Stacey
    I have recently upgraded my staging test site to the latest version of Symfony and updated all the vendors using composer as instructed in the upgrade document that comes with the download. Everything has all updated fine, but I have noticed now that some bits of HTML are not displaying in the Twig templates. I did a comparison with the current live site and it appears to be a character set issue. As an example I had a drop down list that had the following value in: Kitchen Ducting > Ducting Kits > Ducting Kit 4” / 100mm In the updated site the drop-down list item just appeared blank. When I used Twig's raw function it then displayed the item again, but with the dreaded question mark in a black diamond. Kitchen Ducting > Ducting Kits > Ducting Kit 4? / 100mm Things that you should know that may help: The staging test site and live site are both on the same server. In my httpd.conf file I have 'AddDefaultCharset utf-8'. In my php.ini file I have 'default_charset = "utf-8"'. The HTML file served has the Content-Type meta tag 'content="text/html; charset=utf-8"' My database is InnoDB and uses 'utf8' as the default character set and 'utf8_general_ci' as default collation. All tables in the database also use the defaults. I looked into BOM with UTF8, but could not work out if that was a problem or not?

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  • jquery masonry on ul with nested ul

    - by Adam Wright
    I'm trying to create a footer nav of a sitemap with levels nested within each other. i want to use masonry so the padding and margin is consistant and not changed depending on nested items. its firing masonry but its adding the relative style to the nested ul if i change the masonry call to select just the first() ul then nested li appear on one line. any ideas? <div id="links"> <ul ><li class="box"><a href="/Industries.aspx" >Industries</a></li><li class="box"><a href="/Services.aspx" >Services</a></li><li class="box"><a href="/Quality---Regulatory.aspx" >Quality &amp; Regulatory</a></li><li class="box"><a href="/About.aspx" >About</a><ul ><li class="box"><a href="/About/Our-Story.aspx" >Our Story</a></li><li class="box"><a href="/About/Our-Mission.aspx" >Our Mission</a></li><li class="box"><a href="/About/Our-Core-Values.aspx" >Our Core Values</a></li></ul></li><li class="box"><a href="/News.aspx" >News</a><ul ><li class="box"><a href="/News/Events.aspx" >Events</a></li></ul></li><li class="box"><a href="/Careers.aspx" >Careers</a></li><li class="box"><a href="/Contact.aspx" >Contact</a></li><li class="box"><a href="/tests.aspx" >tests</a></li></ul> </div> <script type="text/javascript"> $('#links ul').masonry({ singleMode: true, // Disables measuring the width of each floated element. // Set to true if floated elements have the same width. // default: false columnWidth: 182, // Width in pixels of 1 column of your grid. // default: outer width of the first floated element. itemSelector: '.box:visible', // Additional selector to specify which elements inside // the wrapping element will be rearranged. // Required for Infinite Scroll with window resizing. resizeable: true, // Binds a Masonry call to window resizes // so layout appears fluid. // default: true animate: false, // Animates layout rearrangements. // default: false saveOptions: true // Masonry will use the options from previous Masonry // calls by default, so you only have to enter in options once // default: true }); </script>

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  • How to submit Nothing as a route value to ASP MVC

    - by Adam
    I have a route with several optional parameters. These are possible search terms in different fields. So, for example, if I have fields key, itemtype and text then I have in global.asax: routes.MapRoute( _ "Search", _ "Admin.aspx/Search/{Key}/{ItemType}/{Text}", _ New With {.controller = "Admin", .action = "Search" .Key = Nothing, .ItemType = Nothing, .Text = Nothing} _ ) My action takes optional parameters: Function Search(Optional ByVal Key As String = Nothing, _ Optional ByVal ItemType As Integer = 0, _ Optional ByVal Text As String = Nothing, _ Optional ByVal OtherText As String = Nothing) It then checks if the Key and Text strings have a non-null (and non-empty) value and adds search terms to the db request as needed. However, is it possible to send in a null value for, for example, Key but still send in a value for Text? If so, what does the URL look like? (Admin.aspx/Search//0/Foo doesn't work :) ) I know I can handle this using a parameter array instead, but wondered if this was possible using the sort of route described? I could of course define some other value as equivalent to null (for example, a space/%20) but is there any way to send a null value in the URL? I'm suspecting not, but thought I'd see if anyone knew of one. I'm using ASP MVC 2 for this project.

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  • [WEB] Local/Dev/Live deployment - best workflow

    - by Adam Kiss
    Hello, situation We our little company with 3 people, each has a localhost webserver and most projects (previous and current) are on one PC network shared disk. We have virtual server, where some of our clients' sites and our site. Our standard workflow is: Coder PC ? Programmer localhost ? dev domain (client.company.com) ? live version (client.com) It often happens, that there are two or three guys working on same projects at the same time - one is on dev version, two are on localhost. When finished, we try to synchronize the files on dev version and ideally not to mess (thanks ILMV:]) up any files, which *knock knock * doesn't happen often. And then one of us deploys dev version on live webserver. question we are looking for a way to simplify this workflow while updating websites - ideally some sort of diff uploader or VCS probably (Git/SVN/VCS/...), but we are not completely sure where to begin or what way would be ideal, therefore I ask you, fellow stackoverflowers for your experience with website / application deployment and recommended workflow. We probably will also need to use Mac in process, so if it won't be a problem, that would be even better. Thank you

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