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Articles indexed Monday June 7 2010

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  • how do i use MySql ENUM type? (and is it right for a news feed)

    - by Haroldo
    I'm creating a table called news_feed, this will log all the actions a user performs. Lets say I want to store user1234 deleted article412 at midday I then need a table like so timestamp | user_id | subject_type | subject_id | method . there would be 5 potential methods to log, methods = add/edit/delete/update/report and lets say 2 possible subject_type subjects = article/comment I know i could make my own key where 0=add, 1=delete etc etc but this would make my queries cumbersome to use/write as i'd need to keep consulting the key. Is there a MySql type which can read lots of identially values quickly? is this ENUM? how do i use it?!!

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  • How to determine the event of the linux devices?

    - by sasayins
    Hi, I am learning some embedded programming. I am using Linux as my platform and I want to create a daemon program that will check if a particular device(magstrife, keypad, etc) is active. Like for example, my daemon program is running in the background, then when I make a keypress event, my deamon app will do something. What implementation should I do to create this app? And how can I check the event of the devices? Thanks.

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  • gdi+ removable device IO Safe problem

    - by sxingfeng
    I am using gdi+ for image format checking. It is really surprising that gdi+ Image img(path); does not throw exception when a device is removed. for example, I am checking a list of image files on a removable device. I plug the disk off, Then My Application will crashed. How can I avoid such problem? Many Thanks! I am using c++ gdi+ windows ,many thanks.

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  • How to prevent BeautifulSoup from stripping lines

    - by Oli
    I'm trying to translate an online html page into text. I have a problem with this structure: <div align="justify"><b>Available in <a href="http://www.example.com.be/book.php?number=1"> French</a> and <a href="http://www.example.com.be/book.php?number=5"> English</a>. </div> Here is its representation as a python string: '<div align="justify"><b>Available in \r\n<a href="http://www.example.com.be/book.php?number=1">\r\nFrench</a>; \r\n<a href="http://www.example.com.be/book.php?number=5">\r\nEnglish</a>.\r\n</div>' When using: html_content = get_html_div_from_above() para = BeautifulSoup(html_content) txt = para.text BeautifulSoup translate it (in the 'txt' variable) as: u'Available inFrenchandEnglish.' It probably strips each line in the original html string. Do you have a clean solution about this problem ? Thanks.

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  • When i am adding eventHandler on combo in datagridview, its adding eventHandler to all other combo o

    - by Rajesh Rolen- DotNet Developer
    i am using VS2005 (c#.net desktop application). when i am adding eventHandler to a combo of datagridview, its automatically adding same eventhandler to all other combos of same datagridview.. my code: private void dgvtstestdetail_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e) { DataGridView grid = (sender as DataGridView); if (grid.CurrentCell.OwningColumn == grid.Columns["gdvtstd_TestParameter"]) { ComboBox cb = (e.Control as ComboBox); cb.SelectedIndexChanged -= new EventHandler(dvgCombo_SelectedIndexChanged); cb.SelectedIndexChanged += new EventHandler(dvgCombo_SelectedIndexChanged); } }

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  • Abstract class reference

    - by AlgoMan
    Can i have a class Class Room{ ~Room(); virtual cost() =0; } Class Hotel{ map rooms; /* */ }; will my hotel become abstract ? Can it hold the list of concrete Room objects that are derived from Room ?

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  • Javascript match part of url, if statement based on result.

    - by nick
    Here is an example of the url i'm trying to match: http://store.mywebsite.com/folder-1/folder-2/item3423434.aspx What im trying to match is http: //store.mywebsite.com/folder-1 except that "folder-1" will always be a different value. I can't figure out how to write an if statement for this: Example (pseudo-code) if(url contains http://store.mywebsite.com/folder-1) do this else if (url contains http://store.mywebsite.com/folder-2) do something else etc

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  • Lua choose random item from table

    - by Zen
    Seems easy but I just don't get any further: Take this example: local myTable = { 'a', 'b', 'c', 'd' } print( myTable[ math.random( 0, #myTable - 1 ) ] ) Why doesn't it work? Google seems to have no answers on this either

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  • ASP.NET Membership API not working on Win2008 server/IIS7

    - by Program.X
    I have a very odd problem. I have a web app that uses the .NET Membership API to provide login functionality. This works fine on my local dev machine, using WebDev 4.0 server. I'm using .NET 4.0 with some URL Rewriting, but not on the pages where login is required. I have a Windows Server 2008 with IIS7 However, the Membership API seemingly does not work on the server. I have set up remote debugging and the LoginUser.LoggedIn event of the LoginUser control gets fired okay, but the MembershipUser is null. I get no answer about the username/password being invalid so it seems to be recognising it. If I enter an invalid username/password, I get an invalid username/password response. Some code, if it helps: <asp:ValidationSummary ID="LoginUserValidationSummary" runat="server" CssClass="validation-error-list" ValidationGroup="LoginUserValidationGroup"/> <div class="accountInfo"> <fieldset class="login"> <legend>Account Information</legend> <p> <asp:Label ID="UserNameLabel" runat="server" AssociatedControlID="UserName">Username:</asp:Label> <asp:TextBox ID="UserName" runat="server" CssClass="textEntry"></asp:TextBox> <asp:RequiredFieldValidator ID="UserNameRequired" runat="server" ControlToValidate="UserName" CssClass="validation-error" Display="Dynamic" ErrorMessage="User Name is required." ToolTip="User Name is required." ValidationGroup="LoginUserValidationGroup">*</asp:RequiredFieldValidator> </p> <p> <asp:Label ID="PasswordLabel" runat="server" AssociatedControlID="Password">Password:</asp:Label> <asp:TextBox ID="Password" runat="server" CssClass="passwordEntry" TextMode="Password"></asp:TextBox> <asp:RequiredFieldValidator ID="PasswordRequired" runat="server" ControlToValidate="Password" CssClass="validation-error" Display="Dynamic" ErrorMessage="Password is required." ToolTip="Password is required." ValidationGroup="LoginUserValidationGroup">*</asp:RequiredFieldValidator> </p> <p> <asp:CheckBox ID="RememberMe" runat="server"/> <asp:Label ID="RememberMeLabel" runat="server" AssociatedControlID="RememberMe" CssClass="inline">Keep me logged in</asp:Label> </p> </fieldset> <p class="login-action"> <asp:Button ID="LoginButton" runat="server" CommandName="Login" CssClass="submitButton" Text="Log In" ValidationGroup="LoginUserValidationGroup"/> </p> and the code behind: protected void Page_Load(object sender, EventArgs e) { LoginUser.LoginError += new EventHandler(LoginUser_LoginError); LoginUser.LoggedIn += new EventHandler(LoginUser_LoggedIn); } void LoginUser_LoggedIn(object sender, EventArgs e) { // this code gets run so it appears logins work Roles.DeleteCookie(); // this behaviour has been removed for testing - no difference } void LoginUser_LoginError(object sender, EventArgs e) { HtmlGenericControl htmlGenericControl = LoginUser.FindControl("errorMessageSpan") as HtmlGenericControl; if (htmlGenericControl != null) htmlGenericControl.Visible = true; } I have "Fiddled" with the Login form reponse and I get the following Cookie-Set headers: Set-Cookie: ASP.NET_SessionId=lpyyiyjw45jjtuav1gdu4jmg; path=/; HttpOnly Set-Cookie: .ASPXAUTH=A7AE08E071DD20872D6BBBAD9167A709DEE55B352283A7F91E1066FFB1529E5C61FCEDC86E558CEA1A837E79640BE88D1F65F14FA8434AA86407DA3AEED575E0649A1AC319752FBCD39B2A4669B0F869; path=/; HttpOnly Set-Cookie: .ASPXROLES=; expires=Mon, 11-Oct-1999 23:00:00 GMT; path=/; HttpOnly I don't know what is useful here because it is obviously encrypted but I find the .APXROLES cookie having no value interesting. It seems to fail to register the cookie, but passes authentication

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  • MySQL - Configuration

    - by Stuart Brierley
    Having previously detailed how to install MySQL Server, the next step is configuring MySQL. The MySQL configuration wizard can either be run immediately following installation from the MySQL installation wizard or manually from the Start Menu. Following the splash screen you can then choose whether to run a detailed or standard configuration. The detailed configuration allows you to create the optimal configuration for your specific machine, whereas the standard configuration creates a general configuration that can then be manually tuned. I chose detailed.   You are then asked to choose the type of server instance that is being configured. In this case it is a developer machine. Following this you are asked to choose the type of database usage that you expect on the server. I opted for multifunctional. You must then specify the location of the InnoDB tablespace.   Next specify the number of concurent connections to the server.   Now you must configure the networking options. I left the Strict mode enabled as this is the recommended option, but I disabled TCP/IP networking as I wanted to restrict this MySQL installation to the local machine only.   Set the character set that is best suited to your use - for me this was the default standard character set. Next up is the option to run MySQL as a service and whether or not to include the mysql dircetories in the windows PATH. I kept the install as a windows service option enabled, but unchecked the Launch MySQL server automatically option. This is because I only wanted MySQL running when I specifically want to use it. I also enabled the include in windows PATH option.   You can then change the security settings for the mysql installation. I opted to change the root password, disable root from local machines and disable annoymous access.   You are now ready to execute the configuration.   Once completed you should hopefully see the completed screen with lots of nice ticks against the various configuration tasks.

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  • what is serialization and how it works

    - by Rozer
    I know the serialization process but have't implemented it. In my application i have seen there are various classes that has been implemented serilizable interface. consider following class public class DBAccessRequest implements Serializable { private ActiveRequest request = null; private Connection connection = null; private static Log log = LogFactory.getLog(DBAccessRequest.class); public DBAccessRequest(ActiveRequest request,Connection connection) { this.request = request; this.connection = connection; } /** * @return Returns the DB Connection object. */ public Connection getConnection() { return connection; } /** * @return Returns the active request object for the db connection. */ public ActiveRequest getRequest() { return request; } } just setting request and connection in constructor and having getter setter for them. so what is the use of serilizable implementation over here...

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  • Partial Postback ASP.NET 1.1

    - by Zai
    Hi, I have a ASP.NET web page which is built with .net 1.1 and in GridView the data is displayed as below. This was designed with Delphi studio. There is a discount mechanism for people who selects multiple items from checkboxes and I want when they select multiple items then price is updated but without the complete postback of the page. Any help or suggestions please?

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  • Transposing from rows into columns

    - by Deques
    Hey, I have a table like this Name State Amount ------------------------------ Pump 1 Present 339 Pump 1 Optimized 88 Which I want to transpose something like this Pump 1 Present 339 Optimized 88 How can I do this with MS SQL 2000? I tried to search for a solution, but couldn't find the most fitting solution :(

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  • XML parsing using jQuery

    - by lmkk
    I have the following xml: <?xml version="1.0" encoding="utf-8"?> <Area xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <Scenes> <Scene Index="1" Name="Scene1" /> <Scene Index="2" Name="Scene2" /> </Scenes> </Area> Which i am trying to parse with jquery: <script> $(document).ready(function(){ $.ajax({ type: "GET", url: "list.xml", dataType: "xml", success: function(xml) { $(xml).find('scenes').each(function(){ $(this).find('scene').each(function(){ var name = $(this).attr('name'); $('<div class="items" ></div>').html('<p>'+name+'</p>').appendTo('#page-wrap'); }); }); } }); }); </script> Why is this not working? Help!! first attempt at javascript/jquery This is based on a example I found, but have so far been unable to adapt it to my usage. / Lars

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  • how to make a web-gallery with RoR?

    - by neuro
    hello, Im a newbie RoR kid, and I'm trying to make a web gallery app just like the onyx http://www.hulihanapplications.com/projects/onyx since it's outdated and i couldn't get it to work with my 2.3.8 rails' version. So, are plugins like paperclip or carrierwave any good for me to start with. Or should i take another route and writh the app from scratch. please provide me with good links regarding the subject. thank you in advance

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  • Easier way to move a project in Eclipse

    - by myplacedk
    My projects changes location, and I need to tell Eclipse this. Today I just delete the project and import it from the new location. But I have a lot of projects, they change location often and the paths a very complicated. I'd like a better way to manage this in Eclipse. For example: J:\iteration234_abc\foo\bar\baz\iffle\dizzle\Project Only the root-folder changes (iteration-number and the idenfier "abc"). After that there are lot of folders. Many folders has tons of subfolders with similar names, which makes finding the folder with GUI time-consuming and very boring. It would be so nice if I could just edit the path. As you may have guessed: The J-drive is a network drive, provided by the source control system. The way to tell source control that I'm working on another itertion, is to continue my work in a different folder. My actual Eclipse workspace normally doesn't contain any projects.

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  • Redirect application's graphical output in Windows Vista/7 (with DWM)

    - by puri
    I want to create a desktop manager that takes informations of all running applications including states and screenshots to display and manipulate them in my virtual space (probably in 3D). It can be considered as another layer of abstraction on top of Windows itself. Because many native Windows Vista/7 features like Flip 3D and Live Thumbnails are able to show each window's activities in real-time e.g. video keeps playing in taskbar's thumbnail, I think DWM allows an application to redirect its output to somewhere else or some special processes are able to collect other applications' graphical outputs (maybe of child processes only). Has Microsoft released a set of public APIs to do so? If not, is it technically possible? And is it easier if I limit my scope to just .NET applications with WPF?

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  • How to fix the size of the Hashtable and find the whether it has fix size or not?

    - by Vijjendra
    Hi All, I am trying to fix the size of the Hashtable with following code. Hashtable hashtable = new Hashtable(2); //Add elements in the Hashtable hashtable.Add("A", "Vijendra"); hashtable.Add("B", "Singh"); hashtable.Add("C", "Shakya"); hashtable.Add("D", "Delhi"); hashtable.Add("E", "Singh"); hashtable.Add("F", "Shakya"); hashtable.Add("G", "Delhi"); hashtable.Add("H", "Singh"); hashtable.Add("I", "Shakya"); hashtable.Add("J", "Delhi"); I have fix the size of this Hashtable is 2 but I can add more than 2 elements in this, why this happen, I am doing somthing wrong? I have tried to find out is this Hashtable have fix size of not with hashtable.IsFixedSize, it always returns false Please tell me where I am wrong, or there is another way..

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  • Find if a user is facing a certain Location using Digital Compass by constructing a triangle and usi

    - by Aidan
    Hi Guys, I'm constructing a geolocation based application and I'm trying to figure out a way to make my application realise when a user is facing the direction of the given location (a particular long / lat co-ord). I've done some Googling and checked the SDK but can't really find anything for such a thing. Does anyone know of a way? To clarify Android knows my location, the second location and my orientation. What I want is a way for Android to recognise when my orientation is "facing" the second location (e.g within 90 Degrees or so). We're also assuming that the user is stationary and needs updates every second or so therefore getBearing(); is useless. Alright so we get it has to be math, there appears to be no simple SDK stuff we can use. I did some searching of my own and found Barycentric Co-ords http://www.blackpawn.com/texts/pointinpoly/default.html . So what I'm trying to do now is map the camera's field of view. For Example if the person is facing a certain direction the program should construct a triangle around that field of view, e.g it should make one vertices the phone's position and then go out either side for a set distance making the 2 end points vertices constructing a triangle. If I had this I could then apply Barycentric co-ords to see if the point lay within the newly constructed triangle. Idea's anyone? Example. I could get my current orientation, add 45 to it and go up X distance one side and subtact 45 and go up X distance the other side to find my 2 other points. Though, how would I make android know which way it should go "up" I guess? It would know its baring as this stage so I need it to recognise it's bearing and go out that direction.

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  • Culture Sensitive GetHashCode

    - by user114928
    Hi, I'm writing a c# application that will process some text and provide basic query functions. In order to ensure the best possible support for other languages, I am allowing the users of the application to specify the System.Globalization.CultureInfo (via the "en-GB" style code) and also the full range of collation options using the System.Globalization.CompareOptions flags enum. For regular string comparison I'm then using a combination of: a) String.Compare overload that accepts the culture and options b) For some bulk processes I'm caching the byte data (KeyData) from CompareInfo.GetSortKey (overload that accepts the options) and using a byte-by-byte comparison of the KeyData. This seemed fine (although please comment if you think these two methods shouldn't be mixed), but then I had reason to use the HashSet< class which only has an overload for IEqualityComparer<. MS documentation seems to suggest that I should use StringComparer (which implements both IEqualityComparer< and IComparer<), but this only seems to support the "IgnoreCase" option from CompareOptions and not "IgnoreKanaType", "IgnoreSymbols", "IgnoreWidth" etc. I'm assuming that a StringComparer that ignores these other options could produce different hashcodes for two strings that might be considered the same using my other comparison options. I'd therefore get incorrect results from my application. Only thought at the moment is to create my own IEqualityComparer< that generates a hashcode from the SortKey.KeyData and compares eqality be using the String.Compare overload. Any suggestions?

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  • How to create a desktop shortcut to a website with website logo as icon?

    - by Wbdvlpr
    Hi I need a solution which allows users to create a desktop shortcut to a website, preferably with website logo as shortcut icon. There are ways users can create shortcut such as drag drop favicon or right click create new shortcut etc. This works but also creates the shortcut with default IE icon on windows. I am trying to avoid this method for this icon and some other reasons. I thought of creating a website-title.URL file, and tell users to download and save file to their desktop, again this works but doesn't solve the icon problem as the website logo (.ico) has to be at local disk and at a pre-specified location [IconFile=path]. I was wondering if it is possible to create a some sort of installer or windows application which users can download from the website. Once its executed by user, it creates this .URL file on user desktop which have IconFile path pre-specified, and copy the website-logo.ico at path specified in .URL file etc. So my questions are - Is it possible to create such a solution? What programming languages can be used to achieve this? Can this installer/app be made to work on non-windows machines as well? From developments point of view how big project it is? if I have to hire a programmer to do this. Please let me know if you need more information. Thanks

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