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  • Lua parser in python

    - by Joe Simpson
    Hi, I'm looking into using Lua in a web project. I can't seem to find any way of directly parsing in pure python and running Lua code in Python. Does anyone know how to do this? Joe

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  • Fluent NHibernate MappingException : could not instantiate id generator

    - by Mark Simpson
    I'm pottering around with Fluent NHibernate to try and get a simple app up and running. I'm running through this Fluent NHibernate Tutorial. Everything seems to be going fine and I've created the required classes etc. and it all builds, but when I run the test, I get an exception. Someone in the comments section of the tutorial has the same problem, but I can't find any good information on what's causing it. Any help appreciated. It's probably something trivial. Exception details: FluentNHTest.Tests.Mappings.CustomerMappingTests.ValidateMappings: FluentNHibernate.Cfg.FluentConfigurationException : An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail. ---- FluentNHibernate.Cfg.FluentConfigurationException : An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail. ---- NHibernate.MappingException : could not instantiate id generator ---- System.FormatException : Input string was not in a correct format.

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  • Rails "rake test" crashing

    - by Homer J. Simpson
    Hi, this might be rather unspecific, but I'm trying to do 'rake test' on a new rails app, and end up with (in /Users/myname/dev/railstest/RailsApplication1) /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby -I"lib:test" "/Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake/rake_test_loader.rb" /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby -I"lib:test" "/Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake/rake_test_loader.rb" /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby -I"lib:test" "/Library/Ruby/Gems/1.8/gems/rake-0.8.7/lib/rake/rake_test_loader.rb" No other output. System is Leopard 10.5, Rails 2.3.5, Ruby 1.86 Any ideas ?

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  • not getting output from parmiko/ssh command

    - by Matt
    I am using paramiko/ssh/python to attempt to run a command on a remote server. When I ssh manually and run the command in question, I get the results I want. But if I use the python (co-opted from another thread on this site) below, there is no returned data. If I modify the command to be something more basic like 'pwd' or 'ls' I can then get the output. Any help is appreciated. Thanks, Matt import paramiko import time import sys, os, select import select username='medelman' password='Ru5h21iz' hostname='10.15.27.166' hostport=22 cmd='tail -f /x/web/mlog.txt' #works cmd='' #doesn't work client = paramiko.SSHClient() client.load_system_host_keys() client.connect(hostname=hostname, username=username, password=password) transport = client.get_transport() channel = transport.open_session() channel.exec_command(cmd) while True: rl, wl, xl = select.select([channel],[],[],0.0) if len(rl) 0: # Must be stdout print channel.recv(1024) time.sleep(1)

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  • Stop 2 identical queries from executing almost simultaneously?

    - by James Simpson
    I have developed an AJAX based game where there is a bug caused (very remote, but in volume it happens at least once per hour) where for some reason two requests get sent to the processing page almost simultaneously (the last one I tracked, the requests were a difference of .0001 ms). There is a check right before the query is executed to make sure that it doesn't get executed twice, but since the difference is so small, the check hasn't finished before the next query gets executed. I'm stumped, how can I prevent this as it is causing serious problems in the game. Just to be more clear, the query is starting a new round in the game, so when it executes twice, it starts 2 rounds at the same time which breaks the game, so I need to be able to stop the script from executing if the previous round isn't over, even if that previous round started .0001 ms ago.

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  • iPhone: Problems releasing UIViewController in a multithreaded environment

    - by bart-simpson
    Hi! I have a UIViewController and in that controller, i am fetching an image from a URL source. The image is fetched in a separate thread after which the user-interface is updated on the main thread. This controller is displayed as a page in a UIScrollView parent which is implemented to release controllers that are not in view anymore. When the thread finishes fetching content before the UIViewController is released, everything works fine - but when the user scrolls to another page before the thread finishes, the controller is released and the only handle to the controller is owned by the thread making releaseCount of the controller equals to 1. Now, as soon as the thread drains NSAutoreleasePool, the controller gets releases because the releaseCount becomes 0. At this point, my application crashes and i get the following error message: bool _WebTryThreadLock(bool), 0x4d99c60: Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now... The backtrace reveals that the application crashed on the call to [super dealloc] and it makes total sense because the dealloc function must have been triggered by the thread when the pool was drained. My question is, how i can overcome this error and release the controller without leaking memory? One solution that i tried was to call [self retain] before the pool is drained so that retainCount doesn't fall to zero and then using the following code to release controller in the main thread: [self performSelectorOnMainThread:@selector(autorelease) withObject:nil waitUntilDone:NO]; Unfortunately, this did not work out. Below is the function that is executed on a thread: - (void)thread_fetchContent { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSURL *imgURL = [NSURL URLWithString:@"http://www.domain.com/image.png"]; // UIImage *imgHotspot is declared as private - The image is retained // here and released as soon as it is assigned to UIImageView imgHotspot = [[[UIImage alloc] initWithData: [NSData dataWithContentsOfURL: imgURL]] retain]; if ([self retainCount] == 1) { [self retain]; // increment retain count ~ workaround [pool drain]; // drain pool // this doesn't work - i get the same error [self performSelectorOnMainThread:@selector(autorelease) withObject:nil waitUntilDone:NO]; } else { // show fetched image on the main thread - this works fine! [self performSelectorOnMainThread:@selector(showImage) withObject:nil waitUntilDone:NO]; [pool drain]; } } Please help! Thank you in advance.

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  • How am I supposed to deploy an ASP.NET MVC 4.0 website?

    - by Matt Frear
    What's the recommended way to deploy a website created with ASP.NET 4.0 and Visual Studio 2010? I've previously always added a web setup project to my solution, and used that to create an MSI, even for small applications. But when I build a web setup project in VS2010 it kind of works but some stuff still seems broken: 1. I need to turn on IIS 6 Compatibility on a Win 2008 R2 box to get the msi to run. 2. The msi includes web.config, web.debug.config, and web.release.config. I thought VS's web.config transformations was supposed to take care of that. -Matt

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  • How is your Mac set up for Windows development?

    - by Matt Brailsford
    Hi Guys, I'm looking at buying a MacBook Pro to replace my tiring laptop. My day to day job is as a .NET web developer so I am looking to use VMware Fusion to run VS and SQL server etc. As I've not run my dev environment in a VM before, I would like to know how others are setup. What apps to you have installed? In which environment? Where do you store your files? Within each environment, or some shared drive? Are there any gotchas? Or essentials I should know. Many thanks Matt

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  • Flash causing jerky javascript animations

    - by Matt Brailsford
    Hi Guys, I'm developing a site which has a flash background playing a small video loop scaled to fill the whole background. Over the top I have a number of HTML elements which are animated using javascript. The problem I am having is that (predominantly in FF, but also in others to a lesser degree) the flash seems to be causing my javascript animations to run rather jerky, and in some cases missing the animation altogether and just jumping to the end state. Does anybody have any thoughts on how to make the 2 work together nicely? Many thanks Matt

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  • Basic Login Script using php and mysql inquiry

    - by Matt
    Attempting to write a check for a login script to see if the username is available. Would the best way to write this query be to check if isset(!_POST[]) for both values (nick and pass) then connect to database WHERE the mysql database for the usernick requested return the user id if the usernick exists evaluate if isset($id) to see if the user name is taken and use that to continue to creating an entry Does this logically sound like a method to check for login without using excessive code sorry for not posting the code, it is on another computer and this computer is locked down by my administrator at work... Also, is there another way to evaluate if a value exists in the database? For instance, instead of setting $id to the return value of the mysql database can i just ping the mysql database for the information and have it return a Boolean result so I am not putting out any user information. Thanks, Matt

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  • Jquery Uploader not saving to a folder in the site root

    - by Iain Simpson
    im trying to integrate the Jquery Uploader into my website http://blueimp.github.com/jQuery-File-Upload/ The problem I am having is that I cant seem to get it save the folder I want to to save to. In the UploadHander.php I have the following settings 'script_url' => $this->get_full_url().'/', 'upload_dir' => dirname($_SERVER['SCRIPT_FILENAME']).'./images/machinery/', 'upload_url' => $this->get_full_url().'./images/machinery/', This results in an image uploaded url that looks like this http://domain.com/rcsetch/up/server/php/machinery/image.jpg Other than putting my php files in the root of the website, im not sure how to get it to work, as what I want it to do is upload the files to http://domain.com/images/machinery and not to the create a folder in the directory where all the php files for the uploader are located.

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  • How to correctly cache images

    - by James Simpson
    I just installed Google's Page Speed plugin to Firebug, and everything looks good except for caching. I have set headers to cache my JS and CSS files, but it says the images aren't being cached. How can I make sure the images get cached for 30 days? These are static images, so I can't just add the headers with PHP like I did with the other files.

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  • PHP: session isnt saving before header redirect

    - by Matt
    Hi guys, I have read through the php manual for this problem and it seems quite a common issue but i have yet to find a solution. I am saving sessions in a database. My code is as follows: // session $_SESSION['userID'] = $user->id; header('Location: /subdirectory/index.php'); Then at the top of index.php after the session_start(), i have var_dumped the $_SESSION global and the userID is not in there. As i said ive looked through the PHP manual (http://php.net/manual/en/function.session-write-close.php) and neither session_write_close or session_regenerate_id(true) worked for me. Does anybody know a solution? Edit: I have session_start() at the top of my file. When i var_dump the session global before the header redirect, i see the userID in there, but not in the other file, which is in a subdirectory of this script Thanks, Matt

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  • Really new to XCode. Why won't the thing run?

    - by Matt W
    Hi, I'm trying to follow the April 2009 and Winter 2010 Stanford iPhone app development videos and I'm running up against the same problems with both. First, they don't appear to be using the latest version of XCode - the Outlets and Actions panels are in a different window and there is little info on the net about this (other than one other post on S.O.F.) Second, having got to the point where I've managed to connect the slider, label and changedLabelText connections, I save, build and run the app - the simulator loads, the app loads and then promptly closes again. What's going on? I have not written any code yet and I still have an app which, while it compiles, does not behave! Is there a better starting point for an XCode noob than the Stanford vids? Thanks, Matt.

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  • How to optimize this user ranking query

    - by James Simpson
    I have 2 databases (users, userRankings) for a system that needs to have rankings updated every 10 minutes. I use the following code to update these rankings which works fairly well, but there is still a full table scan involved which slows things down with a few hundred thousand users. mysql_query("TRUNCATE TABLE userRankings"); mysql_query("INSERT INTO userRankings (userid) SELECT id FROM users ORDER BY score DESC"); mysql_query("UPDATE users a, userRankings b SET a.rank = b.rank WHERE a.id = b.userid"); In the userRankings table, rank is the primary key and userid is an index. Both tables are MyISAM (I've wondered if it might be beneficial to make userRankings InnoDB).

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  • WPF UserControl Embedded Animation

    - by Matt B
    Hi all, I have a UserControl called Beetle.xaml which has animation makeing the legs move. So far so good. I added this to my Background.xaml page by decaring the xmlns and xaml as: xmlns:my="clr-namespace:Intellident.Liber8.GUI.Theme.Jungle" and <my:Beetle VerticalAlignment="Bottom" HorizontalAlignment="Left" Margin="180,0,0,175"> <UserControl.RenderTransform> <MatrixTransform x:Name="trnBeetle" /> </UserControl.RenderTransform> </my:Beetle> However I get errors telling me that I can't declare my:Name as I'm in the wrong scope. I can't declare my:Name as this doesn't exist. How do I do this, I want to create a path animation on the beetle to make him walk around... Ta, Matt. EDIT: THought I'd point out that both Beetle.xaml and Background.xaml live in Intellident.Liber8.GUI.Theme.Jungle namescope.

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  • jQuery Validation using the class instead of the name value

    - by Matt
    Hi, I'd like to validate a form using the jquery validate plugin, but I'm unable to use the 'name' value within the html - as this is a field also used by the server app. Specifically, I need to limit the number of checkboxes checked from a group. (Maximum of 3.) All of the examples I have seen, use the name attribute of each element. What I'd like to do is use the class instead, and then declare a rule for that. html This works: <input class="checkBox" type="checkbox" id="i0000zxthy" name="salutation" value="1" /> This doesn't work, but is what I'm aiming for: <input class="checkBox" type="checkbox" id="i0000zxthy" name="i0000zxthy" value="1" /> javascript: var validator = $(".formToValidate").validate({ rules:{ "salutation":{ required:true, }, "checkBox":{ required:true, minlength:3 } } }); Is it possible to do this - is there a way of targeting the class instead of the name within the rules options? Or do I have to add a custom method? Cheers, Matt

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  • Efficient storage/retrieval method for replayable comet style applications (Google Wave, Etherpad)

    - by Gareth Simpson
    I am considering a web application that would have the same kind of multi user, automatic saving, infinite undo / replay capabilities that you see in Google Wave and Etherpad (albeit on a drastically smaller scale and userbase). Before I go away and reinvent the wheel, is this something that has already been addressed as either a piece of technology or library, or even just a design pattern. I know this isn't necessarily the best Stack Overflow question as there is probably not a "right" answer, but my Google-fu has failed me and I'd just like a reading list! Ordinarily I would be developing under python/django but this is not a firm requirement just a preference :)

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  • Why are my connections not closed even if I explicitly dispose of the DataContext?

    - by Chris Simpson
    I encapsulate my linq to sql calls in a repository class which is instantiated in the constructor of my overloaded controller. The constructor of my repository class creates the data context so that for the life of the page load, only one data context is used. In my destructor of the repository class I explicitly call the dispose of the DataContext though I do not believe this is necessary. Using performance monitor, if I watch my User Connections count and repeatedly load a page, the number increases once per page load. Connections do not get closed or reused (for about 20 minutes). I tried putting Pooling=false in my config to see if this had any effect but it did not. In any case with pooling I wouldn't expect a new connection for every load, I would expect it to reuse connections. I've tried putting a break point in the destructor to make sure the dispose is being hit and sure enough it is. So what's happening? Some code to illustrate what I said above: The controller: public class MyController : Controller { protected MyRepository rep; public MyController () { rep = new MyRepository(); } } The repository: public class MyRepository { protected MyDataContext dc; public MyRepository() { dc = getDC(); } ~MyRepository() { if (dc != null) { //if (dc.Connection.State != System.Data.ConnectionState.Closed) //{ // dc.Connection.Close(); //} dc.Dispose(); } } // etc } Note: I add a number of hints and context information to the DC for auditing purposes. This is essentially why I want one connection per page load

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  • How to extract the last name from [email protected] using Oracle?

    - by Simpson
    Hello - I know this can't be too difficult, but I've tried everything I can think of and cannot get it to work. I need to compare the value of a column (LASTNAME) with a system variable (:VARIABLE), but the variable is an email address, so I need to trim off the "@email.com" and "firstname." Some things I've tried: select * from TABLENAME where LASTNAME LIKE :VARIABLE select * from TABLENAME where LASTNAME IN :VARIABLE I've been able to trim off the @email.com, can't figure out how to trim off FIRSTNAME. at the same time. Thanks!

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  • Custom Django Field is deciding to work as ForiegnKey for no reason

    - by Joe Simpson
    Hi, i'm making a custom field in Django. There's a problem while trying to save it, it's supposed to save values like this 'user 5' and 'status 9' but instead in the database these fields show up as just the number. Here is the code for the field: def find_key(dic, val): return [k for k, v in dic.items() if v == val][0] class ConnectionField(models.TextField): __metaclass__ = models.SubfieldBase serialize = False description = 'Provides a connection for an object like User, Page, Group etc.' def to_python(self, value): if type(value) != unicode: return value value = value.split(" ") if value[0] == "user": return User.objects.get(pk=value[1]) else: from social.models import connections return get_object_or_404(connections[value[0]], pk=value[1]) def get_prep_value(self, value): from social.models import connections print value, "prep" if type(value) == User: return "user %s" % str(value.pk) elif type(value) in connections.values(): o= "%s %s" % (find_key(connections, type(value)), str(value.pk)) print o, "return" return o else: print "CONNECTION ERROR!" raise TypeError("Value is not connectable!") Connection is just a dictionary with the "status" text linked up to the model for a StatusUpdate. I'm saving a model like this which is causing the issue: Relationship.objects.get_or_create(type="feedback",from_user=request.user,to_user=item) Please can someone help, Many Thanks Joe *_*

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  • Page loading effect with jquery

    - by Andy Simpson
    Hello all, Is there a way to use jquery (or other method) to display a loading div while page loads? I have a table that is populated using PHP/MySQL and can contain several thousand rows. This is then sorted using the tablesorter plugin for jquery. Everything works fine, however the page can sometimes take 4-5 seconds to fully load and it would be nice to display a 'loading...' message within a div which automatically disappears when whole table is loaded. I have heard of loadmask plugin for jquery - would this be suitable for my needs and if not any alternative? No AJAX calls are being made while loading this table if thats relevant. Thanks in advance Andy

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  • Efficiently compute the row sums of a 3d array in R

    - by Gavin Simpson
    Consider the array a: > a <- array(c(1:9, 1:9), c(3,3,2)) > a , , 1 [,1] [,2] [,3] [1,] 1 4 7 [2,] 2 5 8 [3,] 3 6 9 , , 2 [,1] [,2] [,3] [1,] 1 4 7 [2,] 2 5 8 [3,] 3 6 9 How do we efficiently compute the row sums of the matrices indexed by the third dimension, such that the result is: [,1] [,2] [1,] 12 12 [2,] 15 15 [3,] 18 18 ?? The column sums are easy via the 'dims' argument of colSums(): > colSums(a, dims = 1) but I cannot find a way to use rowSums() on the array to achieve the desired result, as it has a different interpretation of 'dims' to that of colSums(). It is simple to compute the desired row sums using: > apply(a, 3, rowSums) [,1] [,2] [1,] 12 12 [2,] 15 15 [3,] 18 18 but that is just hiding the loop. Are there other efficient, truly vectorised, ways of computing the required row sums?

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  • Does the order of columns in a query matter?

    - by James Simpson
    When selecting columns from a MySQL table, is performance affected by the order that you select the columns as compared to their order in the table (not considering indexes that may cover the columns)? For example, you have a table with rows uid, name, bday, and you have the following query. SELECT uid, name, bday FROM table Does MySQL see the following query any differently and thus cause any sort of performance hit? SELECT uid, bday, name FROM table

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