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  • iPhone: How to store a location (CLLocationCoordinate2D) inside a class w/o leaking memory?

    - by Henry
    I am creating a library which contains an API for setting the current location based off some value collected by the GPS. I want to store this location in my class and later, change the behavior of my library if it is set. What I had in mind was: @interface myLib { @property (nonatomic, retain) CLLocationCoordinate2D *location; } @implementation myLib { @synthesize location = _location; - (void)setLocation:(CLLocationCoordinate2D *)loc { location = loc; } - (void)someFunc { if (location != nil) ... } } However, retain isn't a valid property for a CLLocationCoordinate2D object. So, what is the proper way to save CLLocationCoordinate2D for later use w/o wasting memory? Thanks in advance!

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  • unrobustive jQuery and rails with ajax and form validation

    - by bogumbiker
    Hello, I am looking for a way to call successfully custom function from submitHandler to do proper ajax post. Here is my custom function: jQuery.fn.submitWithAjax = function() { this.submit(function() { $.post(this.action, $(this).serialize(), null, "script"); return false; }) return this; }; Before using validate plugin I had following which worked fine: $(document).ready(function() { $("#my_form").submitWithAjax(); } Now I have added the validation part and have no idea how to call my custom submitWithAjax function?? $(document).ready(function() { $("#my_form").validate({ /*Validations - works perfectly!! */ }, submitHandler: function(form) { /* $("#my_form").submitWithAjax(); - this works but introduces recursion */ /* how to call custom subitWithAjax() ????? */ } }); }) Thanks!

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  • Getting JRuby to work in RubyMine

    - by John Baker
    I setup the proper SDK because all my ruby code will compile but RubyMine complains that it can't find the any of my java classes? Is this a flaw or is there a way to get it to recognizewhere the classes are? Here is my code, I have underlined all the things its complaining about require 'java' include_class 'java.awt.event.ActionListener' include_class 'javax.swing.JButton' include_class 'javax.swing.JFrame' class ClickAction include ActionListener def action_performed(event) puts "Button got clicked." end end Is there a way around this because I'd love to buy RubyMine if it's able to inform me of what Java classes and methods I can pick from. Thanks

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  • flush output in Bourne Shell

    - by n-alexander
    I use echo in Upstart scripts to log things: script echo "main: some data" >> log end script post-start script echo "post-start: another data" >> log end script Now these two run in parallel, so in the logs I often see: main: post-start: some data another data This is not critical, so I won't employ proper synching, but thought I'd turn auto flush ON to at least reduce this effect. Is there an easy way to do that? Update: yes, flushing will not properly fix it, but I've seen it help such situations to some degree, and this is all I need in this case. It's just that I don't know how to do it in Shell

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  • 404 Error - HEAD request on default page

    - by Matt
    I am working on a project where we are about to go to internal release. So we are working to clean up the small problems before then. I was looking at our logs and noticed a high number of 404 errors. On further inspection it seems that all of them are related to HEAD requests. I haven't been able to find any substantive information about the preferred method for handling this in a standards compliant manner. Is there anything out there that can point out the proper way to handle that.

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  • How to implement full text search in Django?

    - by Jannis
    I would like to implement a search function in a django blogging application. The status quo is that I have a list of strings supplied by the user and the queryset is narrowed down by each string to include only those objects that match the string. See: if request.method == "POST": form = SearchForm(request.POST) if form.is_valid(): posts = Post.objects.all() for string in form.cleaned_data['query'].split(): posts = posts.filter( Q(title__icontains=string) | Q(text__icontains=string) | Q(tags__name__exact=string) ) return archive_index(request, queryset=posts, date_field='date') Now, what if I didn't want do concatenate each word that is searched for by a logical AND but with a logical OR? How would I do that? Is there a way to do that with Django's own Queryset methods or does one have to fall back to raw SQL queries? In general, is it a proper solution to do full text search like this or would you recommend using a search engine like Solr, Whoosh or Xapian. What are there benefits? Thanks for taking the time

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  • Freeware Programmer Calculator

    - by AdamC
    There have been lots of times in the past where a good programmer-oriented calculator would've saved me a lot of time. Lately, I've been doing quite a lot of bit manipulation, and having to do build/run to debug my calculations feels really slow. I've looked for something like this in the past, but found nothing that worked very well. The only thing that comes close is this one from AnalogX, but I can't get it to work or really do anything on my vista box which is where I'm doing most of my work at the moment. (btw - please send comments about my vista usage here;). Anyway, I'm looking for something for simple calculations using a C-like syntax with support for proper precenedce, operators, etc. Bonus points for cross-platform. The python interpreter was a great idea and is totally cross-platform. For windows only SpeQ is amazing. Thanks for the suggestions.

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  • HTTP Headers for Unknown Content-Length

    - by jocull
    I am currently trying to stream content out to the web after a trans-coding process. This usually works fine by writing binary out to my web stream, but some browsers (specifically IE7, IE8) do not like not having the Content-Length defined in the HTTP header. I believe that "valid" headers are supposed to have this set. What is the proper way to stream content to the web when you have an unknown Content-Length? The trans-coding process can take awhile, so I want to start streaming it out as it completes.

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  • Android: ContentObserver selfChange

    - by mattprecious
    Hi, In the ContentObserver class, the method onChange is passed a boolean selfChange that's defined as: "true if the update was caused by a call to commit on the cursor that is being observed." What's the proper way to update the cursor so that selfChange is set to true? My current code doesn't reference the cursor at all for an update and selfChange is always false as a result. ContentValues values = new ContentValues(); values.put("date", date.getTime()); getContentResolver().update(URI, values, "_id = " + id, null);

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  • Create a custom worksheet function in Excel VBA

    - by Tomalak
    I have a faint memory of being able to use VBA functions to calculate values in Excel, like this (as the cell formula): =MyCustomFunction(A3) Can this be done? EDIT: This is my VBA function signature: Public Function MyCustomFunction(str As String) As String The function sits in the ThisWorkbook module. If I try to use it in the worksheet as shown above, I get the #NAME? error. Solution (Thanks, codeape): The function is not accessible when it is defined ThisWorkbook module. It must be in a "proper" module, one that has been added manually to the workbook.

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  • Math problem: Determine the corner radius of an inner border based on outer corner radius/thickness

    - by chaiguy
    Here's a math/geometry problem for the math whizzes (not my strongest subject). This is for WPF, but should be general enough to solve regardless: I have two embedded Border elements, with the outer one having a certain corner radius, R and border thickness, T. Given these two values, what should the corner radius of the inner Border, R' be set to such that the two corner edges meet with no overlap or holes? So far I've just been eyeballing it, but if someone can give me a proper formula that would be great. Respect points if you can!! ;)

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  • Slow select when inserting large amounts of data (MYSQL)

    - by siannopollo
    I have a process that imports a lot of data (950k rows) using inserts that insert 500 rows at a time. The process generally takes about 12 hours, which isn't too bad. Normally doing a query on the table is pretty quick (under 1 second) as I've put (what I think to be) the proper indexes in place. The problem I'm having is trying to run a query when the import process is running. It is making the query take almost 2 minutes! What can I do to make these two things not compete for resources (or whatever)? I've looked into "insert delayed" but not sure I want to change the table to MyISAM. Thanks for any help!

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  • Technique for ensuring HTML- and URL-encoding

    - by JW
    Has anyone implemented a good template system for ensuring that output is properly HTML-encoded where it makes sense? Maybe even something that recognizes when output should be URL-encoded or JSON-encoded instead? The lazy approach — just encoding all inputs — causes problems when you want to send those inputs to a database, or to a block of JavaScript code. So something a little smarter is needed. The tedious approach — putting the proper encoding function around each piece of data on the template — works, but it's easy for developers to forget to do it. Is there a good approach that makes it easy for developers, and ensures that the right encoding is done? I was listening to one of the SO podcasts, and Joel tossed out an idea about using typed data to enforce a difference between HTML-encoded strings and non-encoded strings. Maybe that could be a starting point. I'm looking more for a strategy than for an implementation in a particular language (although I'd be happy to hear about implementations that already exist and work).

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  • Where to place ClientAccessPolicy.xml for Local WCF Service?

    - by cam
    I'm trying to create a basic WCF Service and Silverlight client. I've followed the following tutorial: http://channel9.msdn.com/shows/Endpoint/Endpoint-Screencasts-Creating-Your-First-WCF-Client/ Since Silverlight 4 was incompatible with the WSHttpBinding, I changed it to BasicHttpBinding. Unfortunately I keep getting this error now: "An error occurred while trying to make a request to URI'**'.This could be due to attempting to access a service in a cross-domain way without a proper cross-domain policy in place, or a policy that is unsuitable for SOAP services. You may need to contact the owner of the service to publish a cross-domain policy file and to ensure it allows SOAP-related HTTP headers to be sent." I placed clientaccesspolicy.xml in the root directory of the WCF project (which is in the same solution as the Silverlight client). This did not solve the problem. What do I need to do?

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  • Dynamically building and updating Histograms with JFreeChart

    - by job
    I've got a stream of incoming data that I would like to plot using a simple histogram. I don't know the range of values, or the proper resolution or bin width to use for the histogram. SimpleHistogramDataset provides some of this functionality, but I don't want to have to deal with catching exceptions in order to add new bins if the new value isn't covered. In addition, it doesn't easily allow me to rebuild the histogram using a different bin width (perhaps an integer multiples of some initial set width). Is there an easy way to accomplish this with JFreeChart or some alternate charting library, or am I going to have to write my own class here?

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  • How to paste metafile from Microsoft Word at expected size

    - by Joel
    I'm having an issue in a WPF application using the RichTextBox where content being pasted in from Microsoft Word is mangled. To work around the issue, I found that Word includes a metafile on the clipboard, and I can get the metafile from the clipboard using interop (WPF wouldn't properly import the metafile either). My problem, though, is that a metafile is scalable and so whether a user pastes a whole page of content or a small amount, the metafile claims that its Width is 4390. However, if I strip the clipboard of everything but the metafile and paste it into MSPaint, the resulting bitmap in paint has properly scaled the pasted metafile, so it seems to me that there must be some information somewhere that indicates the real size. Does anyone know how to get the proper expected size of the Metafile?

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  • TimeSpan to Localized String in C#

    - by MadBoy
    Is there an easy way (maybe built in solution) to convert TimeSpan to localized string? For example new TimeSpan(3, 5, 0); would be converted to 3 hours, 5minutes (just in polish language). I can of course create my own extension: public static string ConvertToReadable(this TimeSpan timeSpan) { int hours = timeSpan.Hours; int minutes = timeSpan.Minutes; int days = timeSpan.Days; if (days > 0) { return days + " dni " + hours + " godzin " + minutes + " minut"; } else { return hours + " godzin " + minutes + " minut"; } } But this gets complicated if i want to have proper grammar involved.

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  • cordova :: XMLHttpRequest :: setRequestHeader does not work with JSONP

    - by Aaron Saunders
    in hello world cordova 2.3.0 app trying to work with ripple added basic BackboneJS code and I get error shown above <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script> <script type="text/javascript" src="http://static.stackmob.com/js/json2-min.js"></script> <script type="text/javascript" src="http://static.stackmob.com/js/underscore-1.4.3-min.js"></script> <script type="text/javascript" src="http://static.stackmob.com/js/backbone-0.9.10-min.js"></script> I have started google with the proper flags --allow-file-access-from-files

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  • Configuring gcc compiler switches in Qt / QtCreator / QMake

    - by andand
    I recently tried to use Qt Creator 1.3.2 / Qt 4.6.2 / gcc 4.4.0 (32-bit version) on Windows 7 (64-bit) to compile an application using some of the experimental C++0x extensions and encountered the following (fatal) error: This file requires compiler and library support for the upcoming ISO C++ standard, C++0x. This support is currently experimental, and must be enabled with the -std=c++0x or -std=gnu++0x compiler options. In my search for a solution, I came across this thread, and added the following to the .pro file: CXXFLAGS += -std=c++0x but that didn't seem to make a difference. So, I expect there's some tag I need to add to the .pro (project) file, but I've never messed with the gcc compiler switches in Qt / QMake / QtCreator before, and am uncertain about the proper invokation / incantation. So, my question is how do you set gcc compiler switches when using QtCreator / QMake / Qt?

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  • Trouble with MySQL: CONCAT_WS(' ', name_first, name_middle, name_last) like '%keyword%'

    - by AJB
    hey folks, I'm setting up a keyword search across multiple fields: name_first, name_middle, name_last but I'm not getting the results I'd like. Here's the query: "SELECT accounts_users.user_ID, users.name_first, users.name_middle, users.name_last, users.company FROM accounts_users, users WHERE accounts_users.account_ID = '$account_ID' AND accounts_users.user_ID = users.id AND CONCAT_WS(' ', users.name_first, users.name_middle, users.name_last) LIKE '$user_keyword%' ORDER BY users.name_first ASC" So, if I've got three names in the DB: Aaron J Ban Aaron J Can Bob L Lawblaw And if the user_keyword == "bob lawblaw" I get no result. If user_keyword == "bob L" then it returns Bob L Lawblaw. Obviously I can't force people to include the persons middle name in their keyword search but I'm stuck for the proper way to do this. All help is greatly appreciated.

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  • Why do users have to enter a 7-digit twitter PIN to grant my application access?

    - by Tony
    I am implementing some ruby on rails code tweet stuff for my users. I am creating the proper oauth link...something like http://twitter.com/oauth/authorize?oauth_token=y2RkuftYAEkbEuIF7zKMuzWN30O2XxM8U9j0egtzKv But after my test account grants access to twitter, it pulls up a page saying "You've successfully granted access to . Simply return to and enter the following PIN to complete the process. 1234567" I have no idea where the user should enter this PIN and why they have to do that. I don't think this should be a necessary step. Twitter should be redirecting the user to the callback URL I provided in the application settings. Does anyone know why this is happening? UPDATE I found this article that states I need to send my users to this URL (note "authenticate" instead of "authorize"): http://twitter.com/oauth/authenticate?oauth_token=y2RkuftYAEkbEuIF7zKMuzWN30O2XxM8U9j0egtzKv I made the change but Twitter redirects the user to the authorize path after he clicks "Allow" which then gives him the 7 digit PIN again!

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  • Foreign key reference to a two-column primary key

    - by Adam Ernst
    One of my tables has a two-column primary key: CREATE TABLE tournament ( state CHAR(2) NOT NULL, year INT NOT NULL, etc..., PRIMARY KEY(state, year) ); I want a reference to the tournament table from another table, but I want this reference to be nullable. Here's how I might do it, imagining that a winner doesn't necessarily have a tournament: CREATE TABLE winner ( name VARCHAR NOT NULL, state CHAR(2) NULL, year INT NULL ); If state is null but year is not, or vice-versa, the table would be inconsistent. I believe the following FOREIGN KEY constraint fixes it: ALTER TABLE winner ADD CONSTRAINT FOREIGN KEY fk (name, state) REFERENCES tournament (name, state); Is this the proper way of enforcing consistency? Is this schema properly normalized?

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  • HTML encode UTF-8 string gets mangled into latin1

    - by Ken Mayer
    I'm parsing my nginx logs, and I want to discover some details from the HTTP_REFERER string, for example, the query string used to find the web site. One user typed in "México" which gets encoded in the log as "query=M%E9xico". Passing this through Rack::Utils.parse_query('query=M%E9xico') you get a hash, {"query" = "M?xico"} When you to stuff "M?exico" into Postgres (but not the more forgiving SQLite), it pukes because the string isn't proper UTF-8. Looking at http://rack.rubyforge.org/doc/Rack/Utils.html#M000324, unescape is packing a hex string. How can I convert the string back to UTF-8, or can I get parse_query to return UTF-8 in the first place.

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  • How to specify Java Option (System Property) for embedded Tomcat while running Grails App?

    - by hko19
    Specifically, I want to have my grails app under development to connect to an Oracle db defiined by an tnsnames.ora file. I have the tnsnames.ora file located in c:\drivers\Network\ on my PC. When I run the grails app via "grails run-war", the db connection string defined in the tnsnames.ora file doesn't seem to be picked up: grails prod run-war -Dserver.port=62215 -Doracle.net.tns_admin=C:\drivers\Netowrk\ It seems the name-value pair of oracle.net.tns_admin is not being passed to the JVM used by the the embedded Tomcat that comes with Grails 1.2.0. If not, what is the proper way of specify it, or pass any JAVA_OPTS to the underlying JVM?

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  • Python Instance Variable as Default Parameter

    - by DuneBug
    Hello, I have am writing a Python function that takes a timeout value as a parameter. Normally, the user will always use the same timeout value, but on occasion he may want to wait slightly longer. The timeout value is stored as a class instance variable. I want to use the class' timeout instance variable as the default parameter. Currently, I am implementing this as follows: def _writeAndWait (self, string, timeout = -1): if (timeout == -1): timeout = self._timeout I was just wondering, is the proper way to use an instance variable as a default parameter? Or is there a better way that would avoid the "if" check? Thanks, Ryan

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