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• facebook graph api..get friends of friends

  - by Krishnamurthy

  I am using the FB graph api to get a list of my friends' friends using: https://graph.facebook.com/<id>/friends?access_token=<token> Now the weird thing is that this works for some of my friends and does not work for some others. Could somebody tell me why this is happening and a possible fix? In cases where it does not work, I get the following message: "Can't lookup all friends of YYYYYY. Can only lookup for the logged in user (XXXXX), or friends of the logged in user with the appropriate permission" And I repeat, I AM ABLE to get friend lists of some of my friends using the above URL. What permissions are being mentioned here?

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• Is there a name for the technique of using base-2 numbers to encode a list of unique options?

  - by Lunatik

  Apologies for the rather vague nature of this question, I've never been taught programming and Google is rather useless to a self-help guy like me in this case as the key words are pretty ambiguous. I am writing a couple of functions that encode and decode a list of options into a Long so they can easily be passed around the application, you know this kind of thing: 1 - Apple 2 - Orange 4 - Banana 8 - Plum etc. In this case the number 11 would represent Apple, Orange & Plum. I've got it working but I see this used all the time so assume there is a common name for the technique, and no doubt all sorts of best practice and clever algorithms that are at the moment just out of my reach.

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• Replace whitespaces using PHP preg_replace function ignoring quoted strings

  - by Saiful

  Look at the following string: SELECT column1 , column2, column3 FROM table1 WHERE column1 = 'text, "FROM" \'from\\\' x' AND column2 = "sample text 'where' \"where\\\" " AND ( column3 = 5 ) I need to escape unnecessary white space characters from the string like: removing white space from beginning and ending position of , ( ) etc removing newline (\r\n) and tabs (\t) But one thing. The remove process could not remove white spaces from the quoted string like: 'text, "FROM" \'from\\' x' "sample text 'where' \"where\\" " etc. i need to use the PHP function: preg_replace($pattern, $replacement, $string); So what will be the value of $pattern and $replacement where the value of $string is the given SQL.

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• C++ Asymptotic Profiling

  - by Travis

  I have a performance issue where I suspect one standard C library function is taking too long and causing my entire system (suite of processes) to basically "hiccup". Sure enough if I comment out the library function call, the hiccup goes away. This prompted me to investigate what standard methods there are to prove this type of thing? What would be the best practice for testing a function to see if it causes an entire system to hang for a sec (causing other processes to be momentarily starved)? I would at least like to definitively correlate the function being called and the visible freeze. Thanks

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• What do angle brackets around an eclipse perspective mean?

  - by Karin

  I wrote a new perspective for our Eclipse RCP Project. The perspective worked fine, but because of a malconfiguration I had to revert to an earlier code-version in which this perspective didn't exist yet. The strange thing is it still gets shown in the "open perspective" Dialog. The only difference is, that it is now in angle brackets and appears two times. What do the angle brackets mean? (unresolved title perhaps?) And how can I get rid of these entries? Thanks a lot!

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• Create LINQ to entities OrderBy expression on the fly

  - by AyKarsi

  I'm trying to add the orderby expression on the fly. But when the query below is executed I get the following exception: System.NotSupportedException: Unable to create a constant value of type 'Closure type'. Only primitive types ('such as Int32, String, and Guid') are supported in this context. The strange thing is, I am query exactly those primitive types only. string sortBy = HttpContext.Current.Request.QueryString["sidx"]; ParameterExpression prm = Expression.Parameter(typeof(buskerPosting), "posting"); Expression orderByProperty = Expression.Property(prm, sortBy); // get the paged records IQueryable<PostingListItemDto> query = (from posting in be.buskerPosting where posting.buskerAccount.cmsMember.nodeId == m.Id orderby orderByProperty //orderby posting.Created select new PostingListItemDto { Set = posting }).Skip<PostingListItemDto>((page - 1) * pageSize).Take<PostingListItemDto>(pageSize); Hope somebody can shed some light on this!

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• Problems with overlapping ChildWindows in Silverlight

  - by Humanier

  Hello, I have a Silverlight application. At some point the app shows a ChildWindow with two datagrids and three buttons on it. One of the buttons is 'Reset To Defaults'. After it's pressed, the app shows another ChildWindow on top of the current one in order to ask confirmation. After the second ChildWindow is closed the first one starts to act funny. It's still changing highlighting of the elements on mouse events (mouseover on a grid element, click on a button). But clicking on the buttons doesn't fire my custom event handlers anymore. The only thing which is working on the ChildWindow is a small cross button created by the framework itself in the upper-right corner of the ChildWindow. I'd be grateful for any ideas on the cause of the problem or how to resolve it. Thanks.

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• JSObject-like stuff in ActionScript 3?

  - by johncch

  I would like to ask if there is a liveconnect equivalent for ActionScript 3. I understand that there is the ExternalInterface class inside AS3 but it only supports calling a method by name. The really cool thing about Java and LiveConnect is that you can do something like function jsFunc(name) = { this.name = name; this.talk = function(){ alert('hello world my name is ' + this.name); } } javaapplet.function(new jsFunc("bob")); The above approaches pseudo code since I never tested it but I've seen it in action. In AS3, while I am able to pass in an instance of JavaScript "object" into AS, it is often converted into an ActionScript Object instance which does away with all the functions as far as I'm aware. I saw an implementation of JSInterface but I don't think it does specifically that. Is there any way to make OO like javascript work with ActionScript 3?

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• In Windows 7, clicking between file explorer windows does not generate window events. What's up?

  - by asmw

  I have a custom made global hook installed and am monitoring for window messages when file explorer windows are clicked on. The funny thing is that they don't generate any window messages! I click between two file explorer windows and nothing. No VM_CREATE, no VM_ACTIVATE. Nothing. Why is this? Spy++ crashes on my machine so I can't use it but my hook is pretty good and should pick everything up. For some reason these windows just don't function like normal windows in that they don't generate the standard window messages when they become active. It seems windows 7 does not see them as normal windows? what's going on?

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• code duplication in sql case statements

  - by NS

  Hi I'm trying to output something like the following but am finding that there is a lot of code duplication going on. | australian_has_itch | kiwi_has_itch | | yes | no | | no | n/a | | n/a | no | ... My query looks like this with two case statements that do the same thing but flip the country (my real query has 5 of these case statements): SELECT CASE WHEN NOT EXISTS ( SELECT person_id FROM people_with_skin WHERE people_with_skin.person_id = people.person_id AND people.country = "Australia" ) THEN 'N/A' WHEN EXISTS ( SELECT person_id FROM itch_none_to_report WHERE people.country = "Australia" AND person_id = people.person_id ) THEN 'None to report' WHEN EXISTS ( SELECT person_id FROM itchy_people WHERE people.country = "Australia" AND person_id = people.person_id ) THEN 'Yes' ELSE 'No' END australian_has_itch, CASE WHEN NOT EXISTS ( SELECT person_id FROM people_with_skin WHERE people_with_skin.person_id = people.person_id AND people.country = "NZ" ) THEN 'N/A' WHEN EXISTS ( SELECT person_id FROM itch_none_to_report WHERE people.country = "NZ" AND person_id = people.person_id ) THEN 'None to report' WHEN EXISTS ( SELECT person_id FROM itchy_people WHERE people.country = "NZ" AND person_id = people.person_id ) THEN 'Yes' ELSE 'No' END kiwi_has_itch, FROM people Is there a way for me to condense this somehow and not have so much code duplication? Thanks!

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• Valid Email Addresses - XSS and SQL Injection

  - by PAAMAYIM_NEKUDOTAYIM

  Since there are so many valid characters for email addresses, are there any valid email addresses that can in themselves be XSS attacks or SQL injections? I couldn't find any information on this on the web. The local-part of the e-mail address may use any of these ASCII characters: Uppercase and lowercase English letters (a–z, A–Z) Digits 0 to 9 Characters ! # $ % & ' * + - / = ? ^ _ ` { | } ~ Character . (dot, period, full stop) provided that it is not the last character, and provided also that it does not appear two or more times consecutively (e.g. [email protected]). http://en.wikipedia.org/wiki/E-mail_address#RFC_specification I'm not asking how to prevent these attacks (I'm already using parametrized queries and HTML purifier), this is more a proof-of-concept. The first thing that came to mind was 'OR [email protected], except that spaces are not allowed. Do all SQL injections require spaces?

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• PHP equivalent to JavaScript's string split method

  - by m4k00

  I'm working with this on JavaScript: <script type="text/javascript"> var sURL = "http://itunes.apple.com/us/app/accenture-application-for/id415321306?uo=2&mt=8&uo=2"; splitURL = sURL.split('/'); var appID = splitURL[splitURL.length - 1].match(/[0-9]*[0-9]/)[0]; document.write('<br /><strong>Link Lookup:</strong> <a href="http://ax.itunes.apple.com/WebObjects/MZStoreServices.woa/wa/wsLookup?id=' + appID + '&country=es" >Lookup</a><br />'); </script> This script takes the numeric ID and gives me 415321306. So my question is how can I do the same thing but using PHP. Best regards.

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• Confirmation box pops up more than once using ajax

  - by peter burg

  I'm using Ajax to delete records and display an animated message (function display_message) when this record is deleted, but I noticed that the confirmation box pops up depending on the number of records. for example if I have 2 records in my list and I want to delete on of them.The confirmation box pops up twice before deleting and the same thing happen with the message, It appears twice(I'm using a message that fade in and out), and so on(3 records - 3 pops up, etc). I tried a lot to resolve it but I haven't succeed . Here is my function that delete the records: $(function() { $(".delete_class").click(function() { var id = $(this).attr("id"); var dataString = 'id='+ id ; var parent = $(this).parent().parent(); if(confirm("are you sure?")) { $.ajax({ type: "POST", url: "delete.php", data: dataString, cache: false, success: function() { parent.hide(); } }); } display_message("user deleted!") }); }); Please help.

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• Issue with Java join() method.

  - by gmunk

  First of all here are some code snippets: http://pastebin.com/9ZCwekXs http://pastebin.com/TtLLXPYP I'm trying to animate some images. The thing is that I want the main thread to wait for the animation thread to finish and then to continue. I searched around, read a little bit and decided to use the join() method. It perfectly waits for the thread to finish but I doesn't animate correctly. The repaint() method gets called 2 times instead of nine. I think maybe the problem is because I used singletons. Here is the singleton implementation. http://pastebin.com/bA3qLZJE

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• Leak caused by fread

  - by Jack

  I'm profiling code of a game I wrote and I'm wondering how it is possible that the following snippet causes an heap increase of 4kb (I'm profiling with Heapshot Analysis of Xcode) every time it is executed: u8 WorldManager::versionOfMap(FILE *file) { char magic[4]; u8 version; fread(magic, 4, 1, file); <-- this is the line fread(&version,1,1,file); fseek(file, 0, SEEK_SET); return version; } According to the profiler the highlighted line allocates 4.00Kb of memory with a malloc every time the function is called, memory which is never released. This thing seems to happen with other calls to fread around the code, but this was the most eclatant one. Is there anything trivial I'm missing? Is it something internal I shouldn't care about? Just as a note: I'm profiling it on an iPhone and it's compiled as release (-O2).

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• How to take input for a character pointer without using fget?

  - by ashish yadav

  consider the code #include<stdio.h> int main() { char* a; scanf("%s",a);//&a and &a[0] give same results-crashes printf("%s",); return 0; } why does this code results in crashing?whereas this code using character array works fine? #include<stdio.h> int main() { char a[100]; scanf("%s",&a[0]);//works fine printf("%s",a); return 0; } the difference being character array and pointer?but i knew that pointer just points to the first element that is &a[0] should work fine but upper code crashes for all three that is a,&a and &a[0]? the main thing i would to gather is how can i take input of a character pointer if i insist on using scanf only? i apologize if i am not clear. thanks in advance:)

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• WPF DataGrid Entity Framework: Is it possible to bind a datagrid column to a method/function?

  - by seddler

  Hi. I'm wondering if it's possible to bind a gridcolumn (field) to a method or function of an entity? For example I have two entities Person and Company that both inherit the abstract entity Addressee. In my grid I'm listing all Addressees (both persons and companies). I have a column, Name, in the datagrid that I whish to bind to a function GetName(). This function is part of the entity Addressee and based on what type of addressee it is it returns CompanyName (if company) or FirstName+' '+LastName (if person). I also have tried to add a partial class Addressee with a property Name that does the same thing as the function descried over, but this failes when I'm saving to database because the column Name does not exist in database. Can anybody please help me? :-)

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• MATLAB - Delete elements of binary files without loading entire file

  - by Doresoom

  This may be a stupid question, but Google and MATLAB documentation have failed me. I have a rather large binary file (10 GB) that I need to open and delete the last forty million bytes or so. Is there a way to do this without reading the entire file to memory in chunks and printing it out to a new file? It took 6 hours to generate the file, so I'm cringing at the thought of re-reading the whole thing. EDIT: The file is 14,440,000,000 bytes in size. I need to chop it to 14,400,000,000.

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• C# Code Smells. What are the most common and how to fix them?

  - by Carlos Loth

  Hi, One thing I'd like to hear from you guys is what are the code smells that you see most often happen on C# code and how to fix them. I'm working on defining a code-review process for my team and I'd like to include a section with the most common C# code smells and a possible fix for each of them. I'd like the assistance of the community on that, so others can reuse this list for further reference. What are the most common smells you have seen on C# code? How did you fix them?

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• Can folks that edit tags make sure they preserve the information that they would be editing away?

  - by vkraemer

  I have notice that some folks edit the tags associated with questions to make the tag more generic, like converting netbeans6.8-netbeans. I think this is a good thing. BUT, most users/askers do not include version info in the text of their question and some of them do pick the 'versioned' tag. That additional info is valuable at that point. Please read the question before you edit version info out of tags. If the version info is not in the question's text.... take another moment to edit the text of the question, so the info is immediately available to folks that are trying to answer questions.

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• WxWidgets custom events

  - by Klaus

  Hello, I'm trying to use a custom event in my WxWidgets C++ application, like described here. In the constructor of my wxApp: Connect(wxID_ANY, wxCommandEventHandler(APP::OnMyEvent)); Then the function that should catch the event: void APP::OnMyEvent(wxCommandEvent& event) { exit(0); //testing } Finally, to test it: wxCommandEvent MyEvent(wxEVT_COMMAND_BUTTON_CLICKED); wxPostEvent(this, MyEvent); I launch the thing...but it seems that the event is not posted or not caught. Does someone understand this behaviour ?

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• Parallel Task In C#.net

  - by Test123

  I have C#.net application. I wanted to run my application In Thread. But because of third party dll it dont allow to use application in multiThread. There is one object in thrid party dll ,which only allow to create instance at one time only. When i manually run application exe instnace multiple time & process my data it process successfully..(might because of each exe run with its application domain) Same thing i require to implement from C# code. for that i have created dll which can accessible by Type.GetTypeFromProgID()..but multiple dll instnace creating same problem. Is there any way i could achive manual parallelism through code to process same exe code in multiple application domain?

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• ListViewGroup not sorting correctly

  - by Andrew

  I'm using a ListView control in a C# WinForms application. Items in the list are added to a ListViewGroup (in this case, grouping by country). The one thing that isn't working as expected is that the column sorting appears to be strange. I've hooked into the ListViewItemSorter property of the ListView and everything sorts perfectly except when the country column is sorted in descending order (that is, Z-A). Regardless of how the list sort occurs the groups show in ascending order. Can anyone give me a nudge in the right direction? EDIT: FWIW, .NET 3.5 on Vista.

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• Why avoid pessimistic locking in a version control system?

  - by raven

  Based on a few posts I've read concerning version control, it seems people think pessimistic locking in a version control system is a bad thing. Why? I understand that it prevents one developer from submitting a change while another has the file checked out, but so what? If your code files are so big that you constantly have more than one person working on them at the same time, I submit that you should reorganize your code. Break it up into smaller functional units. Integration of concurrent code changes is a tedious and error-prone process even with the tools a good version control system provides to make it easier. I think it should be avoided if at all possible. So, why is pessimistic locking discouraged?

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• How to create an adhoc network between laptops in java?

  - by Muaz

  Hello, I want to create an adhoc between labtops were they will communicate using wireless communication. I will use java for this but still I do not know how to start.. I think I'll have to use sockets for the connections right? How will a laptop notice other laptops in its local network or the other way around? Do i need a server to handle the communication between laptops? Another thing, how to broadcast a message from one laptop to other laptops in the network? Please reply as soon as you can. Any help will be appreciated. Thanks in advance.

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