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• Lexographical sorting problem

  - by Shawn Mclean

  I'm doing a problem that says concatenate the words to generate the lexicographically lowest possible string. from a competition. Take for example this string: jibw ji jp bw jibw The actual output turns out to be: bw jibw jibw ji jp When I do sorting on this, I get: bw ji jibw jibw jp. Does this mean that this is not sorting? If it is sorting, does lexicographic sorting take into consideration pushing the shorter strings to the back or something? I've been doing some reading on lexigographical order and I dont see any point or scenarios on which this is used, do you have any?

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• PyQt4 Need to move DLLs to package root

  - by Xavier

  Hi Guys, I've used the new installers from http://www.riverbankcomputing.co.uk/software/pyqt/download for Python 2.6 x86_64 and I've a small problem importing PyQt4 in one particular application. Here's the traceback: # ERROR : Traceback (most recent call last): # File "<Script Block >", line 2, in <module> # from PyQt4 import QtCore # ImportError: DLL load failed: The specified procedure could not be found. # - [line 2] This might look familiar. Fun thing is that in a previous version of the 3d software it does work (and from a standard command line), but not in the new software version. I inspected the sys.path (within the app) in order to see if this path was there: C:\Python26\Lib\site-packages\PyQt4\bin In both application this path is present. Finally managed to make it works by copying the DLLs from C:\Python26\Lib\site-packages\PyQt4\bin to C:\Python26\Lib\site-packages\PyQt4 Is there any known reason for this? I've a hard time debugging this thing further (making sure everything is 64 bit, path are correct, etc) Thanks for your help

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• How do you use Exslt.dyn (especially the 'evaluate' method) in Umbraco?

  - by jeffreypriebe

  I am trying to execute the string contained in an XSL variable. Umbraco has hooks for several Exslt pieces, but it seems the Exslt.dyn (Exslt.dynamic) is not one of them. How do you add it in? Acceptable methods (in order of preference: Writing your own XSLT extension (possibly using existing Umbraco code for Exslt Dynamic). Uploading the XSL from http://www.exslt.org/dyn/functions/evaluate/index.html into Umbraco. Modifying the Umbraco source to add it (possibly using existing Umbraco code for Exslt Dynamic). The reason I mention Exslt Dyanmic is because some Umbraco XSLT sources show a reference that I am assuming existing in some versions of Umbraco. I cannot find it in the source code, however. (Example: the XSL sources pasted in here: http://our.umbraco.org/projects/starter-kits/business-website-starter-pack/general-%28bugs,-feedback,-feature-requests%29/8085-Changing-the-first-day-to-fx-monday)

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• how do i get subtext source code without Web platform installer?

  - by Jack

  I check all over the net and i can't find a way to get the new version of subtext without using the Web platform installer? Why do we need to install a installer in order to get the source code? what's the purpose of this additional hoop? does anyone know how to get any of the web app on the web gallery without using the web platform installer? edit: ok, i find it on the link text still what is the purpose of the web installer? why not just give us the source?

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• SocketAsyncEventArgs and buffering while messages are in parts

  - by Rob

  C# socket server, which has roughly 200 - 500 active connections, each one constantly sending messages to our server. About 70% of the time the messages are handled fine (in the correct order etc), however in the other 30% of cases we have jumbled up messages and things get screwed up. We should note that some clients send data in unicode and others in ASCII, so that's handled as well. Messages sent to the server are a variable length string which end in a char3, it's the char3 that we break on, other than that we keep receiving data. Could anyone shed any light on our ProcessReceive code and see what could possibly be causing us issues and how we can solve this small issue (here's hoping it's a small issue!) Code below:

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• Benefit of outputting JSON as opposed to plain HTML

  - by Franco

  Hey guys, Just wondering which is best here. I want to output data from a table in my DB then put a lot of this data into a html table on the fly on my page. Im working with Java on the server side. Basically I pull the results form the DB and have the raw data..just what next? There is a chance I may want to take data from multiple tables in order to combine it into one table for my site. I retrieve the results of the query from the DB, now do i create a text from it in the form of json which i can parse as json using jquery upon the return of the object to my browser?(kind of a sub question of this question: Is just using a stringbuilder the correct way to make a json object to output?) Or.. Should i build the HTML as a string and output that to the browser instead? Which is better and why? Thanks in advance!

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• Dynamic dispatch and inheritance in python

  - by Bill Zimmerman

  Hi, I'm trying to modify Guido's multimethod (dynamic dispatch code): http://www.artima.com/weblogs/viewpost.jsp?thread=101605 to handle inheritance and possibly out of order arguments. e.g. (inheritance problem) class A(object): pass class B(A): pass @multimethod(A,A) def foo(arg1,arg2): print 'works' foo(A(),A()) #works foo(A(),B()) #fails Is there a better way than iteratively checking for the super() of each item until one is found? e.g. (argument ordering problem) I was thinking of this from a collision detection standpoint. e.g. foo(Car(),Truck()) and foo(Truck(), Car()) and should both trigger foo(Car,Truck) # Note: @multimethod(Truck,Car) will throw an exception if @multimethod(Car,Truck) was registered first? I'm looking specifically for an 'elegant' solution. I know that I could just brute force my way through all the possibilities, but I'm trying to avoid that. I just wanted to get some input/ideas before sitting down and pounding out a solution. Thanks

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• Get only latest row, grouped by a column

  - by Cylindric

  I have a large data-set of emails sent and status-codes. ID Recipient Date Status 1 [email protected] 01/01/2010 1 2 [email protected] 02/01/2010 1 3 [email protected] 01/01/2010 1 4 [email protected] 02/01/2010 2 5 [email protected] 03/01/2010 1 6 [email protected] 01/01/2010 1 7 [email protected] 02/01/2010 2 In this example: all emails sent to someone have a status of 1 the middle email (by date) sent to them has a status of 2, but the latest is 1 the last email sent to others has a status of 2 What I need to retrieve is a count of all emails sent to each person, and what the latest status code was. The first part is fairly simple: SELECT Recipient, Count(*) EmailCount FROM Messages GROUP BY Recipient ORDER BY Recipient Which gives me: Recipient EmailCount [email protected] 2 [email protected] 3 [email protected] 2 How can I get the most recent status code too? The end result should be: Recipient EmailCount LastStatus [email protected] 2 1 [email protected] 3 1 [email protected] 2 2 Thanks. (Server is Microsoft SQL Server 2008, query is being run through an OleDbConnection in .Net)

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• HTML: How to get a child element to show behind (lower z-index) than its parent

  - by dclowd9901

  I need for a certain dynamic element to always appear on top of another element, no matter what order in the DOM tree they are. Is this possible? I've tried z-index (with position: relative), and it doesn't seem to work. I hate to be vague, but this is the simplest way I can think of asking this question without explaining its purpose ad nauseum. So, to recap, I need <div class="a"> <div class="b"></div> </div> <div class="b"> <div class="a"></div> </div> To display exactly the same when rendered. And for flexibility purposes (I'm planning on distributing a plugin that needs this functionality), I'd really like to not have to resort to absolute or fixed positioning.

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• LBA48 in Linux SCSI ATA Passthrough

  - by Ben Englert

  I am writing a custom disk monitoring/diagnostics app which, among other things, needs to do stuff to SATA disks behind a SAS PCI card under Linux. So far I am following this guide as well as the example code in sg_utils to pass ATA taskfiles through the SCSI layer. Seems to be working okay. However, in both cases, the CDB data structure (pointed to by the cmdp member of the sg_io argument to the ioctl) has only one unsigned char worth of space for the number of sectors. If you look at the ata_taskfile structure in linux\ata.h you'll see that it has an "nsect" and a "hob_nsect" field - high order bits for the sector count, to support LBA48. It turns out that in my application I need LBA48 support. So, anyone know how to set up an sg_io_hdr structure with an LBA48 sector count?

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• Nested mysql select statements

  - by Jimmy Kamau

  I have a query as below: $sult = mysql_query("select * from stories where `categ` = 'businessnews' and `stryid`='".mysql_query("SELECT * FROM comments WHERE `comto`='".mysql_query("select * from stories where `categ` ='businessnews'")." ORDER BY COUNT(comto) DESC")."' LIMIT 3") or die(mysql_error()); while($ow=mysql_fetch_array($sult)){ The code above should return the top 3 'stories' with the most comments {count(comto)}. The comments are stored in a different table from the stories. The code above does not return any values and doesn't show any errors. Could someone please help?

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• Can't use where clause on correlated columns.

  - by Keyo

  I want to add a where clause to make sure video_count is greater than zero. Only categories which are referenced once or more in video_category.video_id should be returned. Because video_count is not a field in any table I cannot do this. Here is the query. SELECT category . * , ( SELECT COUNT( * ) FROM video_category WHERE video_category.category_id = category.category_id ) AS 'video_count' FROM category WHERE category.status = 1 AND video_count > '0' AND publish_date < NOW() ORDER BY updated DESC; Thanks for the help.

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• Connecting std::basic_ofstream<unsigned char> to a FIFO. bad_cast exceptions

  - by Mike B

  Using gcc 4.4.3 on Linux 2.6.32, I get bad_cast exceptions when connecting std::basic_ofstream to a FIFO. Stepping though the debugger, I can see that the error is generated at various places in the standard library because the _M_codecvt member of the stream or filebuf object is NULL. Exactly where it happens depends on the order of operations, but it appears to be the same cause in each. So am I doing something fundamentally stupid here? ofstream and ifstream work fine. Is there some reason that you shouldn't attach a stream of anything besides char to a FIFO? Thanks in advance.

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• Django many-to-many relationship to self with extra data, how do I select from a certain direction?

  - by Jake

  I have some hierarchical data where each Set can have many members and can belong to more than one Set(group) Here are the models: class Set(models.Model): ... groups = models.ManyToManyField('self', through='Membership', symmetrical=False) members = models.ManyToManyField('self', through='Membership', symmetrical=False) class Membership(models.Model): group = models.ForeignKey( Set, related_name='Members' ) member = models.ForeignKey( Set, related_name='Groups' ) order = models.IntegerField( default=-1 ) I want to know how to get all the members or all the groups for a Set instance. I think I can do it as follows, but it's not very logical, can anyone tell me what's going on and how I should be doing it? # This gives me a set of Sets # Which seems to be the groups this Set belongs to set_instance.set_set.all() # These give me a set of Memberships, not Sets set_instance.Members.all() set_instance.Groups.all() # These they both return a set of Sets # which seem to be the members of this one set_instance.members.all() set_instance.groups.all()

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• Cross Browser input field width stylization

  - by Derek Adair

  Hi, I have a shipping/billing input form and I'm having trouble styling the input fields to be the same width... Here is a link (click one of the order bottles to go to the checkout page which contains the form) The Problem: -a field <input type="text" size="X" /> appears to render with different sizes in different browsers (see link). -In addition, select fields seem to render on a differently as well. -Chrome/safari do not seem to respond to the font-size property for select fields. Any guidance on how to stylize the size of text-input and select fields cross-browser would be oh so very helpful. Must I result to having a different sytlesheet for each browser... just for these input fields? -thanks

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• Java - Could not find the main class?

  - by asmo

  I'm having a hard-time with a Java error. I'm getting this when double-clicking on my compiled project Jar file in order to run it: Could not find the main class: testPackage.testFrame. Program will exit. However, my main class is cleary defined in the project properties. Furthermore, everything works fine when I run the project directly from NetBeans. I'm using the ip2c.jar third-party library to determine countries from IP addresses. If I comment the class that is using the ip2c.jar file, I don't get the error. How can a third-party library be preventing the JVM from finding my main class?

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• PHP e-commerce site talking to internal database for stock / ordering?

  - by CitrusTree

  Hi. I'm working on an e-commerce site (either bespoke with PHP, or using Drupal/Ubercart), and I'd like to investigate the site interacting with an internal (filemaker) database we use to manage stock and orders. Currently we manually transfer orders from the web site to our own database, and the site does not check or record changes in stock. My plan to allow the 2 to interact is as follows: Make the internal database available externaly on a machine with a fixed IP Allow external access from the site only Connect to the internal database using ODBC (or similar) Use simple queries to check stock / record stock changes / record order details Am I missing something here as this sounds quite straight forward? Is there another solution I should be taking a look at? Thanks in advance for any help or comments.

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• Using Gradle with an existing Android project

  - by Tom Reznik

  I have an existing Android project with the following structure: - ProjectName -- AndroidManifest.xml -- local.properties -- project.properties -- assets -- libs (containing all jars) -- modules (containing all library projects my project depends on) -- res -- src ---- com/namespace/projectname (all my classes including main activity are here) I haven't been using any specific build system to build my project other than the one provided by default with the Android Studio IDE (though the project was originally created with IntelliJ CE. I would like to use Gradle with the android plugin and do some work on my build process. I have tried several configurations in order to achieve this and have failed to complete a successful build every time. What's the recommended approach in this scenario? should I change my project structure? or is it possible to configure gradle using the existing structure? Any help would be greatly appreciated. Thanks!

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• [R] multiple functions in one R script

  - by Philipp

  Hi, I guess it's a stupid question, but I don't get it :-( I wrote an R script, which creates heatmaps out of xls files. I am calling this R script with a Perl system call and pass over all the arguments. This all works fine. Now I wanted to make the R script less confusing by writing different functions in the R script, for example: args <- commandArgs(TRUE) parsexls <- function(filepath) { data <- read.xls(...) assign("data", data, globalenv()) } reorder <- function(var) { data <- data[order...] assign("data", data, globalenv()) } When I want to call the functions with parsexls(args[1]) reorder(args[2]) nothing happens. But when I place the parsexls(args[1]) in the script between the two functions shown above, the file is parsed correctly! The reorder(args[2]) seems never to be read. Any ideas what I am doing wrong? Phil

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• data between pages: $_SESSION vs. $_GET ?

  - by Haroldo

  Ok, firstly this is not about forms this is about consistent layout as a user explores a site. let me explain: If we imagine a (non-ajax) digital camera online store, say someone was on the DSLR section and specified to view the cameras in Gallery mode and order by price. They then click onto the Compact camera's page. It would be in the users interests if the 'views' they selected we're carried over to this new page. Now, i'd say use a session - am i wrong? are there performance issues i should be aware of for a few small session vars ( ie view=1 , orderby=price) ?

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• setting a timeout for an InputStreamreader variable

  - by Noona

  I have a server running that accepts connections made through client sockets, I need to read the input from this client socket, now suppose the client opened a connection to my server without sending anything through the server's socket outputstream, in this case, while my server tried to read the input through the client socket's inputstream, an exception will be thrown, but before the exception is thrown i would like a timeout say of 5 sec, how can I do this? currently here's how my code looks like on the server side: try { InputStreamReader clientInputStream = new InputStreamReader(clientSocket.getInputStream()); int c; StringBuffer requestBuffer = new StringBuffer(); while ((c = clientInputStream.read()) != -1) { requestBuffer.append((char) c); if (requestBuffer.toString().endsWith(("\r\n\r\n"))) break; } request = new Request(requestBuffer.toString(), clientSocket); } catch (Exception e) // catch any possible exception in order to keep the thread running { try { if (clientSocket != null) clientSocket.close(); } catch (IOException ex) { ex.printStackTrace(); } System.err.println(e); //e.printStackTrace(); }

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• Iterate over a dict or list in Python

  - by Chris Dutrow

  Just wrote some nasty code that iterates over a dict or a list in Python. I have a feeling this was not the best way to go about it. The problem is that in order to iterate over a dict, this is the convention: for key in dict_object: dict_object[key] = 1 But modifying the object properties by key does not work if the same thing is done on a list: # Throws an error because the value of key is the property value, not # the list index: for key in list_object: list_object[key] = 1 The way I solved this problem was to write this nasty code: if isinstance(obj, dict): for key in obj: do_loop_contents(obj, key) elif isinstance(obj, list): for i in xrange(0, len(obj)): do_loop_contents(obj, i) def do_loop_contents(obj, key): obj[key] = 1 Is there a better way to do this? Thanks!

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• VBA Excel: Issue with Zorder /Help with Debugging Code

  - by AME

  Hi, I have multiple shapes and checkboxes in a spreadsheet. I want to create a function that places a particular shape to front (a higher Z-order than its peers) when its corresponding checkbox is clicked. This is the code that I currently have: Sub CheckBox3_Click() If CheckBox3.Value = True Then Sheet1.Shapes("blueoval").ZOrder msoBringToFront End If End Sub I get Run-time Error '424' whenever I run this code. I am new to VBA for excel, so any help would be greatly appreciated. What's wrong with this code? What's missing? etc.. Thanks!

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• Loop colours from variables for graphics.py [Python 3.2]

  - by user1056548

  I am creating a graphics program that draws 100 x 100 squares next to each other depending on the user-specified grid size. The user also inputs 4 colours for the squares to be coloured (e.g. if they enter red,green,blue,yellow the squares will be coloured in that order, repeating the colours). Is it possible to loop the colours from the variables the user has given? Here is what I have so far: def main(): print ("Please enter four comma seperated colours e.g.: 'red,green,blue,yellow'\n\ Allowed colours are: red, green, blue, yellow and cyan") col1, col2, col3, col4 = input("Enter your four colours: ").split(',') win = GraphWin ("Squares", 500, 500) colours = [col1, col2, col3, col4] drawSquare (win, col1, col2, col3, col4, colours) win.getMouse() win.close() def drawSquare(win, col1, col2, col3, col4, colours): for i in range (4): for j in range (len(colours)): colour = colours[j] x = 50 + (i * 50) circle = Circle (Point (x,50), 20) circle.setFill(colour) circle.draw(win) I think I should be using a list in some way, but can't work out exactly how to do it. Can anybody help?

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• Signal amplitude against time (java)

  - by wsr74ws84

  Hi everyone , I'm racking my brain in order to solve a knotty problem (at least for me) While playing an audio file (using java) I want the signal amplitude to be displayed against time. I mean I'd like to implement a small panel showing a sort of oscilloscope .(SPECTRUM ANALYZER) The audio signal should be viewed in the time domain (vertical axis is amplitude and the horizontal axis is time) Does anyone know how to do it? Is there a good tutorial I can rely on? Since I know vwry little about java , I wish someone could help me . Thanks in advance.

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