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  • Storing CLLocationCoordinates2D in NSMutableArray

    - by Amarsh
    After some searching, I got the following solution : ref: http://stackoverflow.com/questions/1392909/nsmutablearray-addobject-with-mallocd-struct CLLocationCoordinate2D* new_coordinate = malloc(sizeof(CLLocationCoordinate2D)); new_coordinate->latitude = latitude; new_coordinate->longitude = longitude; [points addObject:[NSData dataWithBytes:(void *)new_coordinate length:sizeof(CLLocationCoordinate2D)]]; free(new_coordinate); And access it as: CLLocationCoordinate2D* c = (CLLocationCoordinate2D*) [[points objectAtIndex:0] bytes]; However, someone claims that there is a memory leak here? Can anyone suggest me where is the leak and how to fix it. Further, is there a better way of storing a list of CLLocationCoordinate2D in NSMutableArray? Please give sample code since I am an Objective C newbie.

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  • Is it possible, with simple F# pattern matching transformations, to ignore unmatched values without

    - by Phobis
    So, I previously asked this question: http://stackoverflow.com/questions/2820234/can-someone-help-me-compare-using-f-over-c-in-this-specific-example-ip-address I was looking at the posted code and I was wondering if this code could be written without it producing a warning: let [|a;b;c;d|] = s.Split [|'.'|] IP(parseOrParts a, parseOrParts b, parseOrParts c, parseOrParts d) Is it possible to do something for the match _ pattern ot ignore? Without adding in something like Active Patterns? i want to keep the code as simple as possible... can I do this without drastically changing this code? NOTE: Warning is as follows Warning Incomplete pattern matches on this expression. For example, the value '[|_; _; _; _; _|]' may indicate a case not covered by the pattern(s).

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  • caching in memory on server

    - by zaharpopov
    I want to write web app with client Javascript and back-end server (Python). Client needs data from server frequently in AJAX way. Data in DB, and expensive to load for each request. However, in desktop app I would just load data from DB once to memory and then access it. In web app - the server code runs each time for request so I can't do it (each run has to load from DB to memory again). How can this work? Can a single process run on server or do I have to use something different here? An example is like auto-complete here on stackoverflow for tags - how is it implemented in the server for fast caching/loading?

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  • Jquery - How to make $.post() use contentType=application/json?

    - by JK.
    I've noticed that when using $.post() in jquery that the default contentType is application/x-www-form-urlencoded - when my asp.net mvc code needs to have contentType=application/json (See this question for why I must use application/json: http://stackoverflow.com/questions/2792603/aspnet-mvc-why-is-modelstate-isvalid-false-the-x-field-is-required-when-that) How can I make $.post() send contentType=application/json? I already have a large number of $.post() functions, so I don't want to change to $.ajax() because it would take too much time If I try $.post(url, data, function(), "json") It still has contentType=application/x-www-form-urlencoded. So what exactly does the "json" param do if it does not change the contenttype to json? If I try $.ajaxSetup({ contentType: "application/json; charset=utf-8" }); That works but affects every single $.get and $.post that I have and causes some to break. So is there some way that I can change the behavior of $.post() to send contentType=application/json?

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  • Ownership regarding to returned Quartz objects

    - by huggie
    I have recently asked about autoreleasing a returned quartz object: http://stackoverflow.com/questions/2819548/autorelease-for-cgmutablepathref Dave DeLong answered my question that there is no autorelease for quartz (or any NS foundation objects) and I should use the Create Rule. However the naming convention on the document says, The Core Foundation naming conventions, in particular use of the word “create”, only apply to C functions that return Core Foundation objects. Naming conventions for Objective-C methods are governed by the Cocoa conventions, irrespective of whether the method returns a Core Foundation or Cocoa object. By this account since my function is a message in an objective C object it doesn't seem proper to name it createSomething. I still want to return this object. What's the best way to approach this? Should I use the Get Rule and then have the caller explicitly retain it? But this is not within Cocoa convention. What's the proper way to handle this?

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  • How to allow sorting in the Django admin by a custom list_display field, which doesn't have a DB fie

    - by Gj
    I have a custom list_display field which is responsible for a column of integers in one of my admin pages. I need to allow staff members to sort according to it. There's a solution for how to acheive that if the integer represents a count/average/etc of some DB field, which is not the case for me. [ the solution for that case is here: http://stackoverflow.com/questions/2168475/django-admin-how-to-sort-by-one-of-the-custom-list-display-fields-that-has-no-da ] Any ideas how I can achieve this sorting without actually creating and maintaining a DB field for the values?

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  • How To Discover RSS Feeds for a given site.

    - by ktolis
    The quest is, given a site url (say http://stackoverflow.com/ ) to return the list of all the feeds available on the site. Methods acceptable: a) use a 3rd party service (google?, yahoo?, ...) programmatically b) using a crawler/spider (and some tips on how to configure the spider to return the rss/xml feeds only) c) programmatically using c/c++/php (any language/library) The task here is not to get the feeds contained on the page returned by the url but ALL the feeds that are available on the server at any depth... in any cases please provide a simple usage example.

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  • dozer custom convertors for primitive types

    - by koti
    the below url has an example on dozer custom convertors.. http://stackoverflow.com/questions/1931212/map-collection-size-in-dozer but when i tried that example its giving the exception like this.. Type: null Source parent class: dozerPackage.Source Source field name: images Source field type: class java.util.ArrayList Source field value: [www, eee] Dest parent class: dozerPackage.Destination Dest field name: numOfImages Dest field type: int org.dozer.MappingException: Destination Type (int) is not accepted by this Custom Converter (dozerPackage.TestCustomFieldConverter)! is there any way that i can return the primitive types from dozer custom convertors..

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  • asp.net and Visual studio root directory question

    - by Mark Kadlec
    I am seeing something very odd and thought I would ask the Stackoverflow community if they knew the answer. I have an asp.net project that runs fine in one environment, but couldn't figure out what happened to the styles in another environment. In the first environment (Windows 2008 Server), the following link worked fine: <link href="/Styles/09/style.css" rel="stylesheet" type="text/css" /> but in the other environment (it's a Windows 7), I had to change it to work: <link href="../Styles/09/style.css" rel="stylesheet" type="text/css" /> Notice that the directories seemed to shift ahead one directory in the Win7, what's going on? It's like the "running" directory seems now be the \bin directory instead of the home! Which environment is configured correctly? How do I determine execution directory level? My concern going forward is pushing to a prod environment and guessing which configuration is correct. Any insight would be appreciated!

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  • Can I animate a radial gradient in iPhone?

    - by user364782
    I would like to animate a radial gradient to shrink and grow the inner radius, as if it were pulsing. Right now I'm rendering the gradient with CGGradient, but I'm not sure how to animate it. I've seen this topic http://stackoverflow.com/questions/1819311/can-you-animate-gradients-using-quartz-in-an-iphone Which explains how animate a linear gradient with CAGradientLayer, but it doesn't seem like this will draw a radial gradient. Is there an easy way to animate a CGGradient, or some way to create a radial gradient CAGradientLayer? Any thoughts are appreciated.

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  • Remove unnecessary svn:mergeinfo properties

    - by LeonZandman
    When I merge stuff in my repository Subversion wants to add/change a lot of svn:mergeinfo properties to files that are totally unrelated to the things that I want to merge. Questions about this behaviour have been asked before here on Stackoverflow.com, as you can read here and here. From what I understand from the topics mentioned above it looks like a lot of files in my repository have explicit svn:mergeinfo properties on them, when they shouldn't. The advice is to reduce the amount and only put those properties on relevant files/folders. So now my question: how can I easily remove those unneeded properties? I'm using TortoiseSVN, but am reluctant to manually check/fix hundreds of files. Is there an easier way to remove those unnecessary svn:mergeinfo properties? P.S. I'm not looking for C++ SVN API code.

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  • Elegant PostgreSQL Group by for Ruby on Rails / ActiveRecord

    - by digitalfrost
    Trying to retrieve an array of ActiveRecord Objects grouped by date with PostgreSQL. More specifically I'm trying to translate the following MySQL querry: @posts = Post.all(:group => "date(date)", :conditions => ["location_id = ? and published = ?", @location.id, true], :order => "created_at DESC") I am aware that PostgreSQL interpretation of the SQL standard is stricter than MySQL and that consequently this type of query won't work...and have read a number of posts on StackOverflow and elsewhere on the subject - but none of them seem to be the definitive answer on this subject I've tried various combinations of queries with group by and distinct clauses without much joy - and for the moment I have a rather inelegant hack which although works makes me blush when I look at it. What is the proper way to make such a querry with Rails and PostgreSQL ? (Ignoring the fact that surely this should be abstracted away at the ActiveRecord Level)

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  • Validating an Autocomplete field in Django

    - by anonymous coward
    I have models similar to the following: class Band(models.Model): name = models.CharField(unique=True) class Event(models.Model): name = models.CharField(max_length=50, unique=True) bands = models.ManyToManyField(Band) and essentially I want to use the validation capability offered by a ModelForm that already exists for Event, but I do not want to show the default Multi-Select list (for 'bands') on the page, because the potential length of the related models is extremely long. I have the following form defined: class AddEventForm(ModelForm): class Meta: model = Event fields = ('name', ) Which does what is expected for the Model, but of course, validation could care less about the 'bands' field. I've got it working enough to add bands correctly, but there's no correct validation, and it will simply drop bad band IDs. What should I do so that I can ensure that at least one (correct) band ID has been sent along with my form? For how I'm sending the band-IDs with auto-complete, see this related question: http://stackoverflow.com/questions/1528059/

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  • How we run a .NET 32-bit application in a 64-bit Windows server?

    - by Geo
    We are installing a third party application in one of our 64-bit Windows servers. This application apparently was build with the compiler option set to choose the platform at run time. When we run the application it gives us an error: System.BadImageFormatException: is not a valid Win32 application. I have seen in MSDN forums that in order to fix this error I have to build the application set to 32-bit, and that way it will run fine on a 64-bit server. I check on other StackOverflow links Other Posts. How to get around this situation? For everyone that wants to know more information: The application is running fine in a 32-bit test server. IIS version 6 using SQL Server Express 2005 On the Web Service Extension there are both Framework64\v2.0.50727\aspnet_isapi.dll and Framework\v2.0.50727\aspnet_isapi.dll

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  • Learning OpenGL ES 1.x

    - by Kristopher Johnson
    What is the quickest way to come up to speed on OpenGL ES 1.x? Let's assume I know nothing about OpenGL (which is not entirely true, but it's been a while since I last used OpenGL). I am most interested in learning this for iPhone-related development, but I'm interested in learning how it works on other platforms as well. I've found the book OpenGL ES 2.0 Programming Guide, but I am concerned that it might not be the best approach because it focuses on 2.0 rather than 1.x. My understanding is that 2.0 is not backwards-compatible with 1.x, so I may miss out on some important concepts. Note: For answers about learning general OpenGL, see http://stackoverflow.com/questions/62540/learning-opengl Some resources I've found: http://khronos.org/opengles/1_X/ http://www.imgtec.com/powervr/insider/sdk/KhronosOpenGLES1xMBX.asp OpenGL Distilled by Paul Martz (a good refresher on OpenGL basics)

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  • Process every pair in a sequence

    - by Henry Jackson
    I'm looking for a concise way to process every (unordered) pair of elements in a sequence in .NET. I know I can do it with nested foreach loops, but I was looking for something a little more readable. I was imagining something like a modified Any() extension method: IEnumerable<Transaction> transactions = ... if (transactions.AnyPair( (first, second) => first.UniqueID == second.UniqueID)) throw ... Or maybe a foreach-style one: IEnumerable<JigsawPiece> pieces = ... pieces.ForEachPair( (first, second) => { TryFit(first, second); }); This question has been asked for other languages (e.g. see http://stackoverflow.com/questions/942543/operation-on-every-pair-of-element-in-a-list), but I'm looking for a .NET solution.

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  • Fetch Max from a date column grouped by a particular field

    - by vamyip
    Hi, I have a table similar to this: LogId RefId Entered ================================== 1 1 2010-12-01 2 1 2010-12-04 3 2 2010-12-01 4 2 2010-12-06 5 3 2010-12-01 6 1 2010-12-10 7 3 2010-12-05 8 4 2010-12-01 Here, LogId is unique; For each RefId, there are multiple entries with timestamp. What I want to extract is LogId for each latest RefId. I tried solutions from this link:http://stackoverflow.com/questions/121387/sql-fetch-the-row-which-has-the-max-value-for-a-column. But, it returns multiple rows with same RefId. Can someone help me with this? Thanks Vamyip

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  • PHP session values lost after redirect on one script but preserved after redirection on another.

    - by Iuhiz
    On my registration script i have: // Save registration information into the database // Set sessions $_SESSION['var1'] = 'somevalue'; $_SESSION['var2'] = 'anothervalue'; header('Location: /somewhere'); exit(); Then on my login script i have: // Check if user provided correct login credentials if (correct) { $_SESSION['var1'] = 'somevalue'; $_SESSION['var2'] = 'anothervalue'; } header('Location: /somewhere'); exit(); What happened is that the session variables were lost after the header redirect in the registration script but they were preserved after the redirect in the login script. I've checked session_id() at both pages and they have the same value, included session_start() at the top of every page and basically tried the solutions to this common problem found on Stackoverflow but somehow nothing seemed to work. I'm beginning to wonder if it is something to do with my server configuration instead of my code.

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  • Virtual Private Server Hosting with Windows Server 2008 + MS SQL

    - by Kyle LeNeau
    I have seen this question pop-up on stackoverflow a few times but haven't found a good solution yet. I am looking for recommendations on Virtual Private Server Hosting featuring Windows Server 2008 plus MS SQL database capabilities. I have seen people suggest webhost4life.com, hostmysite.com and others but they do not offer windows server 2008 hosting, only 2003. I have also looked at mosso and aspnix.com. Mosso seems like a good move, but an hoping to find something below $100 a month and I have heard extremel mixed reviews on aspnix.com. Thanks for the help.

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  • Online Advetisement/Banner Management System

    - by Sumesh Joshi
    I am developing site for online advertisements where sellers and buyers can come and sell/buy advertisements. Just need to develop detailed statistics like click counts, from which page clicks are coming (one advertisement can be placed on many pages), from which position (top, right, left ...) click are coming (one advertisement can be placed in different position on single page) etc. I seen that most of the advertisement on popular websites has following format: http://ads.stackoverflow.com/a.aspx?Task=Click&ZoneID=3&CampaignID=838&AdvertiserID=50&BannerID=1335&SiteID=1&RandomNumber=1463177307&Keywords=c%23%2c.net%2ccollections%2cdictionary%2chashtable It has many parameters like ZoneID, CampaignID, AdvertiserID, BannerID, SiteID, RandomNumber, adid, adcrid, obid, obtid and way. I can use one advertisement (adid) in multiple pages. But can't figure out the way to distinguish between from which pages clicks are coming. How can I use such parameters to generate statistics which tell me the page from which clicks are coming?

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  • Who to contact regarding DBD::Advantage & bugs

    - by WarheadsSE
    I am in search of who specifically to contact at Sybase regarding Advantage Database Server's DBI driver, specifically DBD::Advantage. The only reference I can find is to one 'lancesc' in the README, but there are no references to a contact email, CPAN author etc. Inadvertantly I happened upon one StackOverflow user lancesc here. Would anyone happen to know who to contact regarding this? I do wish this was on CPAN. I've found a small bug regarding column quoting in the sql parser that they'd likely prefer to be made aware of. There are also several questions I have for them regarding failing functionality.

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  • What is the .NET attribuet to not compile a method is release mode

    - by Russ
    I know that if I have a block of code I don't want compiled when in release mode I can wrap that code block in: #if DEBUG while(true) { Console.WriteLine("StackOverflow rules"); } #endif This will keep this code block from compiling in any mode other than DEBUG. I know there is an attribute that can be placed on an entire method that will do that same, but for the life of me I can't remember what that attribute is. I believe that it’s down the System.Diagnostics namespace, but I'm not really sure. BTW: I'm using .NET 4, but I know this attribute existed in .NET 2 because I have used in in old projects. Thanks

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  • MD5 hash differences between Python and other file hashers

    - by Sam
    I have been doing a bit of programming in Python (still a n00b at it) and came across something odd. I made a small program to find the MD5 hash of a filename passed to it on the command line. I used a function I found here on SO. When I ran it against a file, I got a hash "58a...113". But when I ran Microsoft's FCIV or the md5sum.py in \Python26\Tools\Scripts\, I get a different hash, "591...ae6". The actual hashing part of the md5sum.py in Scripts is m = md5.new() while 1: data = fp.read(bufsize) if not data: break m.update(data) out.write('%s %s\n' % (m.hexdigest(), filename)) This looks functionally identical to the code in the function given in the other answer... What am I missing? (This is my first time posting to stackoverflow, please let me know if I am doing it wrong.)

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  • How can we get unique elements from any ORDER BY DECREASING OR INCREASING

    - by Mohit
    Code given below is taken from the stackoverflow.com !!! Can anyone tell me how to get the array elements order by decreaseing or increasing !! plz help me !!! Thanks in advance $contents = file_get_contents($htmlurl); // Get rid of style, script etc $search = array('@<script[^>]*?>.*?</script>@si', // Strip out javascript '@<head>.*?</head>@siU', // Lose the head section '@<style[^>]*?>.*?</style>@siU', // Strip style tags properly '@<![\s\S]*?--[ \t\n\r]*>@' // Strip multi-line comments including CDATA ); $contents = preg_replace($search, '', $contents); $result = array_count_values( str_word_count( strip_tags($contents), 1 ) ); print_r($result);

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  • Good IM/Chat solution for pasting code

    - by Matt Miller
    We've got several distributed developers working together on a couple of projects. We've been using Skype to host chats with all the developers, and it works okay except for one thing: It REALLY mangles any code we copy and paste into the chats -- especially the whitespace in Python. This question has tons of opinions about chat clients & servers, but no one has much to say about pasting in code. (http://stackoverflow.com/questions/36415/best-chat-im-tool-for-developers) Is anybody out there using a chat or im client that handles source code really well?

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