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Articles indexed Saturday June 12 2010

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  • How to Solve this Error "Cannot convert lambda expression to type 'string' because it is not a deleg

    - by peace
    . I get this error: "Cannot convert lambda expression to type 'string' because it is not a delegate type" - keyword select become underlined in blue Can you please advice. Employee emp = new Employee(); comHandledBySQt.DataSource = from x in emp.GetDataFromTable("1") select new { x.Id, Name = x.FirstName + " " + x.LastName }; comHandledBySQt.DisplayMember = "Name"; comHandledBySQt.ValueMember = "Id"; Above code should displays drop list of employees first name and last name in a combo box

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  • Building a custom CMS, how to handle page settings?

    - by davidosomething
    Not a coldfusion specific question so answer however you can. I've inherited a ColdFusion project where at the top of every page various page-setting specific variables are set, such as: <cfset request.page.title = "Example Page"> <cfset request.page.machineTitle = "example_page"> <cfset request.page.isJQueryEnabled = 1> <cfset request.page.showNavigation = 1> <cfset request.page.SWFObjectVersion = 2.2> I'm thinking about creating a database table with just integer page_id varchar key varchar value I'd reduce the variables at the top of every page to just the page id, and then call the DB for the correct settings. Is this a good idea? I hate reinventing the wheel, but this is a really big project that would require many months for a full content migration to a CMS. What are the current practices for storing page settings? (e.g., what does WordPress do? Drupal? etc.)

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  • Python Pickle: what can cause stack index out of range error?

    - by Rosarch
    I'm getting this error: File "C:\Python26\lib\pickle.py", line 1374, in loads return Unpickler(file).load() File "C:\Python26\lib\pickle.py", line 858, in load dispatch[key](self) File "C:\Python26\lib\pickle.py", line 1075, in load_obj k = self.marker() File "C:\Python26\lib\pickle.py", line 874, in marker while stack[k] is not mark: k = k-1 IndexError: list index out of range Why could this be happening?

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  • Why Mac cannot connect to Iphone?

    - by martin08
    I couldn't always ssh to my iPhone from my Mac. They're both on the same wifi network but sometimes the connection is established, sometimes it failed. From my Mac: $ ssh [email protected] ssh: connect to host 192.168.0.102 port 22: Operation timed out $ ping 192.168.0.102 PING 192.168.0.102 (192.168.0.102): 56 data bytes ping: sendto: No route to host ping: sendto: Host is down ping: sendto: Host is down I enabled SSH on the phone and am sure it can load webpages. So what might be a reason why they cannot connect? Thanks

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  • Which VNC for Mac to WinXP Home control?

    - by IVR Avenger
    Hi, all. I've got a MacBook and a Windows XP Home machine. I'd like to be able to connect into the XP machine from the Mac over VNC, but not through the Web method, where performance seems to be a bit iffy. I've done some research, and it seems everyone is interested in the XP-Mac connection, where I'm looking to go in the other direction. Is there a free VNC Server out there that will let me accomplish this? Thanks! IVR Avenger

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  • Am I doing something wrong here (references in C++)?

    - by m4design
    I've been playing around with references (I'm still having issues in this regard). 1- I would like to know if this is an acceptable code: int & foo(int &y) { return y; // is this wrong? } int main() { int x = 0; cout << foo(x) << endl; foo(x) = 9; // is this wrong? cout << x << endl; return 0; } 2- Also this is from an exam sample: Week & Week::highestSalesWeek(Week aYear[52]) { Week max = aYear[0]; for(int i = 1; i < 52; i++) { if (aYear[i].getSales() > max.getSales()) max = aYear[i]; } return max; } It asks about the mistake in this code, also how to fix it. My guess is that it return a local reference. The fix is: Week & max = aYear[0]; Is this correct/enough?

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  • Disable logging during manage.py test?

    - by Eric Palakovich Carr
    I utilize the standard python logging module. When I call python manage.py test I'd like to disable logging before all the tests are ran. Is there a signal or some other kind of hook I could use to call logging.disable? Or is there some other way to disable logging when python manage.py test is ran?

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  • Incremental Backups / Versioned backups using PHP

    - by Adam
    I'm trying to backup a folder containing several folders and files to a remote location (will be uploading zipped files). Is there any existing scripts that may help me, which checks if the files have been modified after the date of the last backup, and only backs up files created / modified after that? The current size of the data is around 1gb, and I expect adding 50mb-200mb each month Also, what would be the best way to extract the state of the files on a specific date?

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  • What are your thoughts on a possible Developer's Television Network?

    - by Anthony Forloney
    I am a huge fan of informational television shows. Anytime I can learn something new by watching a television show, I am all for it. I wondered about how the community felt about a Developer Network for developers. What are the added advantages and disadvantages of having such a TV network? As an added bonus, what type of television shows should be aired on the network? Make up some fun and interesting television shows and elaborate. Also, for each television show, who could be a potential host? Jon Skeet for a C# television show? Phil Haack for an ASP.NET television show? I am looking forward to some interesting responses.

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  • How to make flash movie to scale proportunatly to div width?

    - by user73119
    I have put together an example page detailing my problem My website is going to have a main wrapper that is set to a max-width property for compatible browsers. It will stretch to 940px across at max. When scaled down I would like the swf to scale proportionately with it. Like an image with width percent applied. The flash movie has the dimensions of 940 × 360 pixels. I can't seem to figure out the correct attributes to add to the embed tag to get it to do this. I am currently using jquery flash embed, but am open to other options, though this is my ideal. In the example I have set the flash background to black. When resize the browser window the flash movie doesn't scale proportionately to the div, only the photo does, leaving a blank canvas (black), while the div height stays the same. I can't add a height value in the CSS. How do I make this scale correctly? Adding a noscale param only crops the image. The swf's height doesn't scale also. All of my code can be viewed in the linked examples source.

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  • What is "Virtual Size" in sysinternals process explorer

    - by robert
    Hi My application runs for few hours, There is no increase in any value ( vmsize, memory) of Task Manager. But after few hours i get out of memory errors. In sysinternals i see that "Virtual Size" is contineously increasing, and when it reach around 2 GB i start getting memory errors. So what kind of memory leak is that ? How can i demonstrate it with a code ? Is it possible to reproduce same thing with any piece of code where none of the memory value increase but only the Virtual Size in sysinternsl process explorer increase ? thanks for any suggestions

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  • Best tool(s) for working with DocBook XML documents?

    - by Anders Sandvig
    I experimented with DocBook XML a while back, and also used it professionally for documenting a few software projects, but since the tool support at the time was not very good, I soon abandoned it in favor of hand-written LaTeX, and later LyX. Now I'm considering taking another look at DocBook, and I was wondering, what are the best tools for working with DocBook XML documents today?

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  • I can't understand GroupJoin where i will need it in database relationships.

    - by Freshblood
    Hello Everybody I am thinking 5-6 hours to understand something about GroupJoin. I am talking about query with linq for Database tables.I understand what Join and GroupJoin does but I really couldn't understand where i will need it.I feel that Join does all what i will need but if there is something which Join can't without GroupJoin so i feel that situation is meaningless or useless. For example: Persons table in relation with Phones and Phones table hold foreign keys of Persons and one person can have one more phone number.If we want to brings all persons who has phone numbers and who hasn't too so we will need GroupJOin but what for we will need this query ? Can u give me good reason , example or explenation for using GroupJoin ?

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  • Can anyone tell me what is wrong with my create trigger syntax?

    - by Travis
    I am experimenting with triggers for the first time. When I try to create a trigger using the following: CREATE TRIGGER t_foldersPrivate BEFORE DELETE ON foldersPrivate FOR EACH ROW BEGIN DELETE FROM programs WHERE folderType = '0' AND folderID = OLD.ID; END; I receive the following error: `1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 3` (mysql 5.1.37) If I get rid fo the delete statement the create trigger statement works fine. So I am assuming it must have something to do with that. But for the life of me I'm not sure what...

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  • Increasing the JVM maximum heap size for memory intensive applications

    - by Alceu Costa
    I need to run a Java memory intensive application that uses more than 2GB, but I am having problems to increase the heap maximum size. So far, I have tried the following approaches: Setting the -Xmx parameter, e.g. -Xmx3000m. This approaches fails at the creation of the JVM. From what I've googled, it looks like that -Xmx must be less than 2GB. Using the -XX:+AggressiveHeap option. When I try this approach I get an 'Not enough memory' error that tells that the heap size is 1273.4 MB, even though my computer has 8GB of memory. Is there another approach that I can try to increase the maximum heap size of the JVM? Here's a summary of the computer specs: OS: Windows 7 (64 bit) Processor: Intel Core i7 (2.66 GHz) Memory: 8 GB

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  • What's the C strategy to "imitate" a C++ template ?

    - by Andrei Ciobanu
    After reading some examples on stackoverflow, and following some of the answers for my previous questions (1), I've eventually come with a "strategy" for this. I've come to this: 1) Have a declare section in the .h file. Here I will define the data-structure, and the accesing interface. Eg.: /** * LIST DECLARATION. (DOUBLE LINKED LIST) */ #define NM_TEMPLATE_DECLARE_LIST(type) \ typedef struct nm_list_elem_##type##_s { \ type data; \ struct nm_list_elem_##type##_s *next; \ struct nm_list_elem_##type##_s *prev; \ } nm_list_elem_##type ; \ typedef struct nm_list_##type##_s { \ unsigned int size; \ nm_list_elem_##type *head; \ nm_list_elem_##type *tail; \ int (*cmp)(const type e1, const type e2); \ } nm_list_##type ; \ \ nm_list_##type *nm_list_new_##type##_(int (*cmp)(const type e1, \ const type e2)); \ \ (...other functions ...) 2) Wrap the functions in the interface inside MACROS: /** * LIST INTERFACE */ #define nm_list(type) \ nm_list_##type #define nm_list_elem(type) \ nm_list_elem_##type #define nm_list_new(type,cmp) \ nm_list_new_##type##_(cmp) #define nm_list_delete(type, list, dst) \ nm_list_delete_##type##_(list, dst) #define nm_list_ins_next(type,list, elem, data) \ nm_list_ins_next_##type##_(list, elem, data) (...others...) 3) Implement the functions: /** * LIST FUNCTION DEFINITIONS */ #define NM_TEMPLATE_DEFINE_LIST(type) \ nm_list_##type *nm_list_new_##type##_(int (*cmp)(const type e1, \ const type e2)) \ {\ nm_list_##type *list = NULL; \ list = nm_alloc(sizeof(*list)); \ list->size = 0; \ list->head = NULL; \ list->tail = NULL; \ list->cmp = cmp; \ }\ void nm_list_delete_##type##_(nm_list_##type *list, \ void (*destructor)(nm_list_elem_##type elem)) \ { \ type data; \ while(nm_list_size(list)){ \ data = nm_list_rem_##type(list, tail); \ if(destructor){ \ destructor(data); \ } \ } \ nm_free(list); \ } \ (...others...) In order to use those constructs, I have to create two files (let's call them templates.c and templates.h) . In templates.h I will have to NM_TEMPLATE_DECLARE_LIST(int), NM_TEMPLATE_DECLARE_LIST(double) , while in templates.c I will need to NM_TEMPLATE_DEFINE_LIST(int) , NM_TEMPLATE_DEFINE_LIST(double) , in order to have the code behind a list of ints, doubles and so on, generated. By following this strategy I will have to keep all my "template" declarations in two files, and in the same time, I will need to include templates.h whenever I need the data structures. It's a very "centralized" solution. Do you know other strategy in order to "imitate" (at some point) templates in C++ ? Do you know a way to improve this strategy, in order to keep things in more decentralized manner, so that I won't need the two files: templates.c and templates.h ?

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  • javax.security.auth.login.LoginException: Login failed

    - by abdeslam
    I'm trying to run a hadoop job (version 18.3) on my windows machine but I get the following error: Caused by: javax.security.auth.login.LoginException: Login failed: CreateProcess: bash -c groups error=2 at org.apache.hadoop.security.UnixUserGroupInformation.login(UnixUserGroupInformation.java:250) at org.apache.hadoop.security.UnixUserGroupInformation.login(UnixUserGroupInformation.java:275) at org.apache.hadoop.mapred.JobClient.configureCommandLineOptions(JobClient.java:557) ... 3 more The same job works fine in an another windows machine. Do I have may be something wrong in the settings variabls? How can I fix this problem?

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  • How to play small sound file continuously in Silverlight?

    - by ash
    Hello, I have two questions regarding Silverlight's SoundPlay action and properties. My scenario is like: I have two story board: The first story board has an image and a sound file; when the silverlight application gets loaded, the sound starts to play automatically, but if someone clicks the image, the sound file will stop and the second storyboard will start with a new sound file. 1) My first question is how to stop the first sound file of first story board when the second story board starts with the second sound file. 2) My second question is how to play a sound file continuously; for example, in Silverlight we can play a story board continuously with RepeatBehavior="Forever"; but I cannot find a way to play my 10 second sound file forever or continuously. Note: I have attached a small XAML file to show what I am talking about; I am also stating that if instead of an image file, if there were a button, then I can stop the first music file after I click the button and start my second story board with a new sound file, but I would like to use image file instead of a button. Is it possible? If it is, how to do it? Therefore, please answer my following two questions or give big hint or website tutorial links on 1) How to stop the first sound file of first story board when the second story board starts with the second sound file ( When the clickable element is an image instead of a button) 2) How to play a 10 second sound file continuously? ............Code Snippet...................... XAML ............ <Grid x:Name="LayoutRoot" Background="Red"> <Button HorizontalAlignment="Left" Margin="212,0,0,111" VerticalAlignment="Bottom" Width="75" Content="Button" Click="onClick"/> <MediaElement x:Name="sound2_mp3" Height="0" HorizontalAlignment="Left" Margin="105,230,0,0" VerticalAlignment="Top" Width="0" Source="/sound2.mp3" Stretch="Fill"/> <MediaElement x:Name="sound1_mp1" Height="0" HorizontalAlignment="Left" Margin="190,164,0,0" VerticalAlignment="Top" Width="0" Source="/sound1.mp3" Stretch="Fill" AutoPlay="False"/> </Grid> ..................................................................................................................................................................................................................... using System; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Ink; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; namespace testPrj { public partial class MainPage : UserControl { public MainPage() { // Required to initialize variables InitializeComponent(); } private void onClick(object sender, System.Windows.RoutedEventArgs e) { Storyboard1.Stop(); sound2_mp3.Stop(); sound1_mp1.Play(); } } } ...................................................................................................

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  • Chaining your own method in Ruby on Rails

    - by steven_noble
    In my Rails app, I am used to using syntax like the following in a number of places, including helpers/application_helper.rb: def my_method(x,y) return x+y end I am also used to calling the resulting method from basically anywhere in my app using syntax like this: my_method(2,3) However, I'd like to be able to use syntax like like this: class_from_my_rails_app.my_method(3) How and where do I define my_method so I can use it like this? I'm happy to consult the documentation, but I just don't know what the latter style is called. What do you call it? Many thanks, Steven.

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  • radio button to php

    - by Azzyh
    Hello so i have this form: <form action="javascript:DoSCInsert()" method="post"> <textarea onfocus="this.cleared=true;javascript:clearContents(this);" rows="5" cols="40" id="comment" name="comment">...</textarea> Yes: <input type="radio" value="Y" id="SCvoteY" name="vote"></input> No: <input type="radio" id="SCvoteN" value="N" name="vote"> </input> <input type="hidden" name="fID" id="fID" value="<? echo $_GET["id"]; ?>" /> <input onsubmit="if (!this.comment.cleared) clearContent(this.comment); return true;" type="submit" name="Submit" value="Stem!"/> </form> Anyway so i have this javascript also that tranfers the output info to insertSC.php: function DoSCInsert(){ $("#SCres").html("to sek.."); var nocache = '0'; var data = { fID : $("#fID").val(), SCvote : $("#SCvoteY").val(), SCvote : $("#SCvoteN").val(), comment: $("#comment").val(), nocache: nocache }; $.get('insertSC.php', data, onSCInsertComplete); } function onSCInsertComplete(data,textstatus){ $("#SCres").html(data); } and in my insertSC.php i have this: <?php echo $_GET['comment']." - ".$_GET['SCvoteY']; ?> Now i get out comment but no SCvoteY.... this is just a test i made, what i was really making is that you vote Y or N and then it inserts into the vote column Y or N(what you pickd) now i couldnt figure how to do it/something went wrong somewhere and now i cant even get out SCvoteY i just get undefined index What i need help with is what i just mention i want to when you either choose Y or N it should output what you choose. If you didnt choose any (empty isset?) then false.. else echo Y or N(what you picked)

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  • WPF TreeViewItem Context Menu Unhighlights Item

    - by Snea
    I have been having problems with this for some time now, and have come up with some less-than-desirable solutions. The problem is that when a TreeViewItem's context menu is opened, the TreeViewItem is greyed out. Is it possible for a TreeViewItem to stay highlighted while its ContextMenu is open? The problem with the TreeViewItem greying out, is that it gives no relation to the context menu and the TreeViewItem, and it looks ugly. Generally, the code I use for setting a context menu is this. Sometimes the context menu will be generated by the code with a PreviewRightMouseButtonDown EventSetter, but it doesn't make a difference. <TreeView> <TreeView.Resources> <Style TargetType="{x:Type TreeViewItem}"> <Setter Property="ContextMenu"> <Setter.Value> <ContextMenu> <MenuItem Header="Menu Item 1" /> <MenuItem Header="Menu Item 2" /> </ContextMenu> </Setter.Value> </Setter> </Style> </TreeView.Resources> <TreeViewItem Header="Item 1"> <TreeViewItem Header="Sub-Item 1"/> </TreeViewItem> <TreeViewItem Header="Item 2"></TreeViewItem> </TreeView> So far the only solution I have found is to override the "grey" unfocused color with the focused color, but then the TreeView never seems unfocused, such as when another control is clicked on. I have had problems with ListViews as well.

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