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• Prolog: find all numbers of unique digits that can be formed from a list of digits

  - by animo

  The best thing I could come up with so far is this function: numberFromList([X], X) :- digit(X), !. numberFromList(List, N) :- member(X, List), delete(List, X, LX), numberFromList(LX, NX), N is NX * 10 + X. where digit/1 is a function verifying if an atom is a decimal digit. The numberFromList(List, N) finds all the numbers that can be formed with all digits from List. E.g. [2, 3] -> 23, 32. but I want to get this result: [2, 3] -> 2, 3, 23, 32 I spent a lot of hours thinking about this and I suspect you might use something like append(L, _, List) at some point to get lists of lesser length. I would appreciate any contribution.

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• Is it safe to take the address of std::wstring's internal pointer?

  - by LCC

  I have an interface which is used like the following: if (SUCCEEDED(pInterface->GetSize(&size)) { wchar_t tmp = new wchar_t[size]; if (SUCCEEDED(pInterface->GetValue(tmp, size))) { std::wstring str = tmp; // do some work which doesn't throw } delete[] tmp; } Is it safe and portable to do this instead? if (SUCCEEDED(pInterface->GetSize(&size)) { std::wstring str; str.resize(size); if (SUCCEEDED(pInterface->GetValue(&str[0], size))) { // do some work } } Now, obviously this works (doesn't crash/corrupt memory) or I wouldn't have asked, but I'm mostly wanting to know if there's a compelling reason not to do this.

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• is it some bug in firefox or jquery or i doing something wrong?

  - by llamerr

  I want to change hidden input value on div click, so i do following: $('#gallery').click(function(){ if ($('input[name=isgallery]').attr('value') == '0') { $('input[name=isgallery]').attr('value', '1') } else { $('input[name=isgallery]').attr('value', '0') } $('#filterform').attr('action',$('#filterform').attr('act')); alert('ok'); $('#filterform').submit(); } ); when it equals 0 i change it to 1 and otherwise but it did not work and following code works: $('#gallery').click(function(){ if ($('input[name=isgallery]').attr('value') == '0') { $('input[name=isgallery]').attr('value', '0') } else { $('input[name=isgallery]').attr('value', '1') } $('#filterform').attr('action',$('#filterform').attr('act')); alert('ok'); $('#filterform').submit(); } ); and also, when i delete the function at all it still works and form submits maybe i have one more handler for this div, but i can't find one you can check it on http://www.4block.org/en/museum/posters and click "gallery view" on top-right

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• Why does XCode keep downloading old deleted profiles and duplicates of the same profile?

  - by Piepants

  If I refresh the profiles in XCode it: a) Pulls down ones that no longer exist. Profiles that have been deleted from the portal and are no longer there b) Pulls down multiple copies of the same profile. If I add a new device and then update the profiles to include that new device. Then XCode will pull down the new updated profile but also the same profile with an older date (even though the portal only shows one, the latest). If I delete them them XCode they re-appear. I'm having problems getting push notifications to work with an ad-hoc distrubtion and so want to ensure I am build with the latest profiles. This behaviour of XCode is irritating at least, and possibly the source of my problems at worst.

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• Any good opensource SharePoint components that can abstract you from the inner SharePoint plumbings?

  - by JL

  I am looking for a good reusable set of components that can be used to communicate with SharePoint via web services, preferably open source. I want some abstraction from CAML and WebDav and SharePoint Web Services that could help me speed up my development time. Ideally I want to select, insert, update and delete from lists, manage attachments in list items, download items from sharepoint, retrieve user meta data from owner info. This sort of thing. Does any such abstraction exist for Sharepoint that use SharePoints web service model, obviously the use of the MOSS Component API is out of the question because it will only run on the hosted MOSS server, and I am writing an SOA app. Thank you

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• Xcode puts Default.png in my plist as an Icon file when I assign a Launch Image

  - by xcode_nooob

  When I set a Launch Image, Xcode creates a copy as Default.png and creates an entry in my plist in Icon Files (IOS 5) / Primary Icon / Icon Items -- Item 1 : Default.png Item 0 : MyIcon.png is the app icon which I have already placed through the Target. The reason this is a problem is that the launch image then takes precedence over the actual icon and as a result, it shows as the primary icon instead of my actual icon image. Why is Xcode doing this? Can I safely delete the Default.png entry from my .plist? (this seems to fix the problem) Do I need to copy Default.png somewhere else? Thanks!

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• Design RESTful service with multiple ids

  - by Dustin Digmann

  I am designing a RESTful service. It is to list a set of data. The main problem is that the set does not have a reasonable, single identifier. Nor can the specific set be easily calculated within the knowledge of the system. As a result, it does not seem possible to have a GET /items/{identifier} service. I do have the id of each element being requested. My main issue is that it does not seem RESTful to list the ids in the URI (eg GET items/{id1},{id2},...,{idn} ). Right? I could see DELETE having a similar use case - remove multiple items in one request cycle. How would such a use case be satisfied while staying within the REST realm? Is that possible?

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• How to SET tiggers 0 in MySQL?

  - by Grijesh Chauhan

  In my MySQL database I have some Triggers ON DELETE and ON INSERT. Some time I need to switched-off my some Triggers, And I have to DROP e.g. DROP TRIGGER IF EXISTS hostgroup_before_insert // and reinstall. Is there any shortcut to SET triggers hostgroup_before_insert = 0 like we have for foreign keys mysql> SELECT version(); +-------------------------+ | version() | +-------------------------+ | 5.1.61-0ubuntu0.10.10.1 | +-------------------------+ 1 row in set (0.00 sec) I am new learner and I could not find regarding this on web.

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• whats wrong with this piece of code for saving contacts

  - by Shadow

  Hi, i am using the latest Nokia Qt SDK. i have tried to add the contacts, its not getting added.. what is missing here.. // Construct contact manager for default contact backend QContactManager* cm = new QContactManager("simulator"); // QContactManager* cm = new QContactManager("memory"); // i tried this, its also not working // Create example contact QContact example; // Add contact name QContactName name; name.setFirstName("John"); name.setLastName("Doe"); example.saveDetail(&name); // Add contact email address //QContactEmailAddress email; // email.setContexts(QContactDetail::ContextHome); //email.setEmailAddress(“[email protected]”); // example.saveDetail(&email); // Finally, save the contact details cm->saveContact(&example); delete cm; Thanks

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• Windows Service Printing Behaviour

  - by Andre

  Alright, I was tasked to develop a Windows Service that listens to a directory for files that are dropped in it, read them, delete them and print out a report. I installed the service on my work laptop (Win 7 x86) and a test machine (XP x86) under a User account at first. It would do everything as it should except the print the report. No errors, nothing. Then I made it run under Local System and it produced a "No printers found" exception. Converting the app to a Console Application and running on these machines gave the desired result. OK, so now I was assuming that there are security "stuff" involved. Then I installed the service on a Server 2008 x64 machine (under Local System) and it just worked. Can anybody explain to me why this is happening? Why does the service allow printing from Server OS but not from a Desktop OS or am I missing something very obvious?

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• Using svn remove - preserve file on disk instead of having it deleted?

  - by user246114

  Hi, I am creating an eclipse project, which generates a lot of files I don't want to keep under version control. For example, it creates a project folder like: project/ bin/ horse.class cow.class src/ horse.java cow.java so what I do is add the project folder to svn, like: svn add project this puts everything under control, even the bin and .class files. All of those files will have the little 'a' next to them. How can I simply remove the 'add' status from those files? If I try: svn remove bin/horse.class I have to use the --force option and it deletes the file from disk. Is there a way to simply remove it from source but not delete the file from disk? Thanks

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• NULL In a Class Destructor

  - by Hyper-DarkStar

  Simple question; Is it pointless to set a pointer( which allocates heap memory ) to NULL in the destructor? class SampleClass { public: SampleClass( int Init = 0 ) { Value = new int( Init ); } ~SampleClass( void ) { delete Value; Value = NULL; // Is this pointless? } int *Value; }; While on the subject of classes, when should I use the explicit keyword? Thanks.

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• Efficient way to organise data file in columns with Python

  - by user1700959

  I'm getting an output data file of a program which looks like this, with more than one line for each time step: 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 7.9819E-06 1.7724E-02 2.3383E-02 3.0048E-02 3.8603E-02 4.9581E-02 5.6635E-02 4.9991E-02 3.9052E-02 3.0399E-02 .... I want to arrange it in ten columns I have made a Python script, using regular expressions to delete \n in the proper lines, but I think that there should be a simpler more elegant way to do it, here is my script: import re with open('inputfile', encoding='utf-8') as file1: datai=file1.read() dataf=re.sub(r'(?P<nomb>( \d\.\d\d\d\dE.\d\d){8})\n','\g<nomb>',datai) with open('result.txt',mode='w',encoding='utf-8') as resultfile: resultfile.write(datof) Thanks in advance

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• Notify a content resolver when normal sql insert or update

  - by user1400538

  I have created a small content provider (which I only use to query a db table and fetch some value). I have confirmed that the provider works fine. The table values get updated on a regular basis through normal sql insertions(and not through anycontent provider) Whenever an insert/update or delete occurs through a normal sqlite operation as mentioned above, I need to notify the content resolvers which was written to communicate with the content provider just for quering database and fetch some values. Is this, possible? If yes what need to be done? Any help is appreciated.

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• Deleting inline model in Django admin

  - by Overclocked

  I am trying to use Django admin to remove an inline model. I get an error saying [u'Select a valid choice. That choice is not one of the available choices.'] I check the location where the exception is raised. It seems like the inline model was removed, then a form validation happened on the parent model with the deleted inline model still as value of the form. That caused the failure. In my admin model, I had a save_formset method defined, that called formset.save(commit=False). Is the commit=False not telling Django to not delete the related models? Thanks.

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• T-SQL - Is there a (free) way to compare data in two tables?

  - by RPM1984

  Okay so i have table a and table b. (SQL Server 2008) Both tables have the exact same schema. For the purposes of this question, consider table a = my local dev table, table b = the live table. I need to create a SQL script (containing UPDATE/DELETE/INSERT statements) that will update table b to be the same as table a. This script will then be deployed to the live database. Any free tools out there that can do this, or better yet a way i can do it myself? I'm thinking i probably need to do some type of a join on all the fields in the tables, then generate dynamic sql based on that. Anyone have any ideas?

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• .save puts NULL in user_id field in Ruby on Rails

  - by mathee

  Here's the model file: class ProfileTag < ActiveRecord::Base def self.create_or_update(options = {}) id = options.delete(:id) record = find_by_id(id) || new record.id = id record.attributes = options puts "record.profile_id is" puts record.profile_id record.save! record end end This gives me the correct print out in my log. But it also says that there's a call to UPDATE that sets profile_id to NULL. I'm not sure I understand why the INSERT puts the value into profile_id properly, but then it sets it to NULL on an UPDATE. If you need more specifics, please let me know. I'm thinking that the save functionality does many things other than INSERTs into the database, but I don't know what I need to specify so that it will properly set profile_id.

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• table row long press

  - by adoo42

  I have a table which is built dynamically based on how much data is present, if at all. I want to be able to long press anywhere on a the table row to be able to get some options to delete or edit etc. Is this possible? Remember I need to do all this without setting any XML as its dynamically built. Is this relevant to what I want to achieve? ` @override public boolean onKeyLongPress(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { // do your stuff here return true; } return super.onKeyLongPress(keyCode, event); } ` any advice is appreciated.

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• How do I completely disable caching in Cakephp?

  - by James Lamiell

  So I opened the cache floodgates in my Cakephp app and now I want to close them... I've done pretty everything I can: delete all files in the tmp folder (but not the folders), turned 'Cache.disable' on in the core.php file in my app, have tried clearing the cache from within some controllers with clearCache() and Cache::clear() (but I suspect this doesn't work because it's not loading the controller -- due to caching). I've pretty much effectively halted my development process just because caching won't turn off. Anyone have some ideas that I could try? I'm starting to think it may be within the browser or maybe my hosting service, but it's probably just Cakephp messing with me.

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• jquery selector question

  - by FFish

  How can I select the src attr from the zoom span? $(".gallery span.zoom").click(function() { // var imgPath = $(this).parent()......attr("src"); // alert(imgPath); return false; }); <ul class="gallery"> <li id="li-1"> <img src="002171/tn/001.jpg" alt="image" /> <span class="delete"></span> <span class="zoom"></span> <em>hello world</em> </li> </ul>

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• Restricting deletion with NHibernate

  - by FrontSvin

  I'm using NHibernate (fluent) to access an old third-party database with a bunch of tables, that are not related in any explicit way. That is a child tables does have parentID columns which contains the primary key of the parent table, but there are no foreign key relations ensuring these relations. Ideally I would like to add some foreign keys, but cannot touch the database schema. My application works fine, but I would really like impose a referential integrity rule that would prohibit deletion of parent objects if they have children, e.i. something similar 'ON DELETE RESTRICT' but maintained by NHibernate. Any ideas on how to approach this would be appreciated. Should I look into the OnDelete() method on the IInterceptor interface, or are there other ways to solve this? Of course any solution will come with a performance penalty, but I can live with that.

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• How would I initialize these two lists so that modifying one doesn't modify the other?

  - by Brandon

  I'm aware of why this is happening, but is there any way to do this without having to implement ICloneable or a Copy() method? Preferably .net 2.0, but 3.5 is fine if it is necessary. Essentially I'm trying to implement an undo method. In most cases I can just perform the reverse action in the Undo(), but for others that is not possible. So I want to keep two lists. One for the list of items that I will be modifying, and one for the original, unmodified list of items. This way if I need to do an undo, I just delete the modified items and replace them with the originals. Most of the ways I've tried to assign the _originalItems variable doesn't work, so what would I need to do? public MyClass(List<SelectedItems> selectedItems) { _selectedItems = new List<SelectedItems>(selectedItems); _originalItems = ?? }

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• refresh page with ajax jquery without use of reload function

  - by Ronak Patel

  I am performing delete records by using jquery ajax in php. I want to refresh that content without the use of location.reload() function. I tried this, $("#divSettings").html(this); but, it's not working. What's the correct logic to get updated content in div. Thanks. Code: function deletePoll(postId){ $.ajax({ type: "POST", url: "../internal_request/ir_display_polls.php", data: { postId: postId }, success: function(result) { location.reload(); //$("#divSettings").html(this); } }); }

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• Looking at the C++ new[] cookie. How portable is this code?

  - by carleeto

  I came up with this as a quick solution to a debugging problem - I have the pointer variable and its type, I know it points to an array of objects allocated on the heap, but I don't know how many. So I wrote this function to look at the cookie that stores the number of bytes when memory is allocated on the heap. template< typename T > int num_allocated_items( T *p ) { return *((int*)p-4)/sizeof(T); } //test #include <iostream> int main( int argc, char *argv[] ) { using std::cout; using std::endl; typedef long double testtype; testtype *p = new testtype[ 45 ]; //prints 45 std::cout<<"num allocated = "<<num_allocated_items<testtype>(p)<<std::endl; delete[] p; return 0; } I'd like to know just how portable this code is.

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• Animate a e.Graphics.DrawLine with arrowhead

  - by Fer

  I need to "animate" an arrow. It can go in any direction (up, down, left, right and diagonals) and the arrowhead will be at the end. It needs to appear as if it is growing from orgin to the end. To make matters more complicated it has to be in a user control so it is possible to add to the controls collection in the forms and remove it to delete it from the screen, and its background is really transparent (no color.transparent) so i can't paint the background to "clear" the previous line. I have it static already (drawn from origin to end) but i can't animate it. I tried to add a timer in the user control but I fail to get a correct algorithm to calculate the intermediate ends of the line while it is growing. Any help would be appreciated. Thanks

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