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• Alternatives to WPD/WIA on Windows XP?

  - by Marek

  WPD does not work correctly on Windows XP (SP1 if that matters), even if Microsoft states it does. Problem with WPD: IPortableDeviceManager.GetDevices call does not find any devices on Win XP while it finds all connected cameras on Windows 7. A few other people had this same problem with WPD not working on XP, no solution: 1 2 I have decided to reimplement the functionality using WIA. Problem with WIA automation/WIA interfaces: WIA automation offers only silly dialogs when interacting with the camera - I need to rather do this from code Programming against WIA interfaces is recommended to achieve lower level tasks with WIA. I have not found any samples how to use WIA interfaces from C# (also found some indication that this is not possible at all or at least very hard to do) Thus I have looked at WIA 2.0 (wrapper around wiaaut.dll): I am getting HRESULT 0x80210006 (WIA_ERROR_BUSY) for the first time and then HRESULT E_FAIL all the time on Win XP while on Windows 7 the same code works without a problem. I am getting out of options here... Can you recommend an alternative to provide the following features for cameras connected to the computer that works on Windows XP? sends a notification that a picture was taken allows to download the recently taken picture from the camera

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• How should I Test a Genetic Algorithm

  - by James Brooks

  I have made a quite few genetic algorithms; they work (they find a reasonable solution quickly). But I have now discovered TDD. Is there a way to write a genetic algorithm (which relies heavily on random numbers) in a TDD way? To pose the question more generally, How do you test a non-deterministic method/function. Here is what I have thought of: Use a specific seed. Which wont help if I make a mistake in the code in the first place but will help finding bugs when refactoring. Use a known list of numbers. Similar to the above but I could follow the code through by hand (which would be very tedious). Use a constant number. At least I know what to expect. It would be good to ensure that a dice always reads 6 when RandomFloat(0,1) always returns 1. Try to move as much of the non-deterministic code out of the GA as possible. which seems silly as that is the core of it's purpose. Links to very good books on testing would be appreciated too.

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• jsf datatable lazy load filter and sorting

  - by darko petreski

  Hi, I have worked on several projects with a lot of data tables. The tables had sorting, filtering and paging of course on server side and with help of the db (all databases has implemented sording, filtering -where and limit the returned results). When workig on real application there are a thousands of even a millions rows. But I have seen several JSF dagatable components. They implement pagination, sorting and filtering on client side!! According to me this is very silly. This technology is called enterprise and they sort the data on the client side with java script! I have not seen any good JSF data grid that has build in features for sorting, filtering and lazy loading on the server side. Why is that? Am I looking in wrong direction or really there in no build support for this. Lately I am testing primefaces and lazy loading datatable. It really works fine, but the table i can only lazy load. If you add sort and filter then the problems begin. Conclusion: Is there any datatable JSF component than can perform lazy load pagination, and filtering and sorting on server side. If I need to implement my own solution thanks to the teams that made client side sorting and filtering, they are useless. Regards

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• How do I get SSIS Data Flow to put '0.00' in a flat file?

  - by theog

  I have an SSIS package with a Data Flow that takes an ADO.NET data source (just a small table), executes a select * query, and outputs the query results to a flat file (I've also tried just pulling the whole table and not using a SQL select). The problem is that the data source pulls a column that is a Money datatype, and if the value is not zero, it comes into the text flat file just fine (like '123.45'), but when the value is zero, it shows up in the destination flat file as '.00'. I need to know how to get the leading zero back into the flat file. I've tried various datatypes for the output (in the Flat File Connection Manager), including currency and string, but this seems to have no effect. I've tried a case statement in my select, like this: CASE WHEN columnValue = 0 THEN '0.00' ELSE columnValue END (still results in '.00') I've tried variations on that like this: CASE WHEN columnValue = 0 THEN convert(decimal(12,2), '0.00') ELSE convert(decimal(12,2), columnValue) END (Still results in '.00') and: CASE WHEN columnValue = 0 THEN convert(money, '0.00') ELSE convert(money, columnValue) END (results in '.0000000000000000000') This silly little issue is killin' me. Can anybody tell me how to get a zero Money datatype database value into a flat file as '0.00'?

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• Trouble understanding SSL certificate chain verification

  - by Josh K

  My app uses SSL to communicate securely with a server and it's having trouble verifying the certificate chain. The chain looks like this: Entrust.net Secure Server Certification Authority - DigiCert Global CA - *.ourdomain.com We are using a certificate store pulled from Mozilla. It contains the Entrust.net certificate, but not the DigiCert Global CA one. My understanding is that an intermediate authority doesn't have to be trusted as long as the root authority is, but the verification fails: % openssl verify -CAfile mozilla-root-certs.crt ourdomain.com.crt error 20 at 0 depth lookup:unable to get local issuer certificate So do I need to explicitly trust the DigiCert Global CA in order for verification to pass? That seems wrong. But you tell me! EDIT: I now understand that the certificate file needs to be available to OpenSSL up front. Something like this works: % openssl verify -CAfile mozilla-root-certs.crt -untrusted digicert.crt ourdomain.com.crt ourdomain.com.crt: OK This allows me to provide a copy of the DigiCert CA without explicitly saying "I trust it", the whole chain still needs to be verified. But surely browsers like Firefox won't always ship with a copy of every single certificate it'll ever need. There's always going to be new CAs and the point is to use the security of the root certificate to make sure all intermediate CAs are valid. Right? So how does this work? Is it really as silly as it looks?

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• Remove ActiveRecord in Rails 3 (beta)

  - by Splash

  Now that Rails 3 beta is out, I thought I'd have a look at rewriting an app I have just started work on in Rails 3 beta, both to get a feel for it and get a bit of a head-start. The app uses MongoDB and MongoMapper for all of its models nad therefore has no need for ActiveRecord. In the previous version, I am unloading activerecord in the following way: config.frameworks -= [ :active_record ] # inside environment.rb In the latest version this does not work - it just throws an error: /Library/Ruby/Gems/1.8/gems/railties-3.0.0.beta/lib/rails/configuration.rb:126:in `frameworks': config.frameworks in no longer supported. See the generated config/boot.rb for steps on how to limit the frameworks that will be loaded (RuntimeError) from *snip* Of course, I have looked at the boot.rb as it suggested, but as far as I can see, there is no clue here as to how I might go about unloading AR. The reason I need to do this is because not only is it silly to be loading something I don't want, but it is complaining about its inability to make a DB connection even when I try to run a generator for a controller. This is because I've wiped database.yml and replaced it with connection details for MongoDB in order to use this gist for using database.yml for MongoDB connection details. Not sure why it needs to be able to initiate a DB connection at all just to generate a controller anyway.... Is anyone aware of the correct Rails 3 way of doing this?

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• How to implement Priority Queues in Python?

  - by dragosrsupercool

  Sorry for such a silly question but Python docs are confusing.. . Link 1: Queue Implementation http://docs.python.org/library/queue.html It says thats Queue has a contruct for priority queue. But I could not find how to implement it. class Queue.PriorityQueue(maxsize=0) Link 2: Heap Implementation http://docs.python.org/library/heapq.html Here they says that we can implement priority queues indirectly using heapq pq = [] # list of entries arranged in a heap entry_finder = {} # mapping of tasks to entries REMOVED = '<removed-task>' # placeholder for a removed task counter = itertools.count() # unique sequence count def add_task(task, priority=0): 'Add a new task or update the priority of an existing task' if task in entry_finder: remove_task(task) count = next(counter) entry = [priority, count, task] entry_finder[task] = entry heappush(pq, entry) def remove_task(task): 'Mark an existing task as REMOVED. Raise KeyError if not found.' entry = entry_finder.pop(task) entry[-1] = REMOVED def pop_task(): 'Remove and return the lowest priority task. Raise KeyError if empty.' while pq: priority, count, task = heappop(pq) if task is not REMOVED: del entry_finder[task] return task raise KeyError('pop from an empty priority queue' Which is the most efficient priority queue implementation in python? And how to implement it?

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• Applying business logic to form elements in ASP.NET MVC

  - by Brettski

  I am looking for best practices in applying business logic to form elements in an ASP.NET MVC application. I assume the concepts would apply to most MVC patterns. The goal is to have all the business logic stem from the same place. I have a basic form with four elements: Textbox: for entering data Checkbox: for staff approval Checkbox: for client approval Button: for submitting form The textbox and two check boxes are fields in a database accessed using LINQ to SQL. What I want to do is put logic around the check boxes on who can check them and when. True table (little silly but it's an example): when checked || may check Staff || may check Client Staff | Client || Staff | Client || Staff | Client 0 0 || 1 0 0 1 0 1 || 0 0 0 1 1 0 || 1 0 0 1 1 1 || 0 0 0 1 There are to security roles, staff and client; a person's role determines who they are, the roles are maintained in the database alone with current state of the check boxes. So I can simply store the users roll in the view class and enable and disable check boxes based on their role, but this doesn't seem proper. That is putting logic in UI to control of which actions can be taken. How do I get most of this control down into the model? I mean I need to control which check boxes are enabled and then check the results in the model when the form is posted, so it seems the best place for it to originate. I am looking for a good approach to constructing this, something to follow as I build the application. If you know of some great references which explain these best practices that is really appreciated too.

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• Classes, methods, and polymorphism in Python

  - by Morlock

  I made a module prototype for building complex timer schedules in python. The classe prototypes permit to have Timer objects, each with their waiting times, Repeat objects that group Timer and other Repeat objects, and a Schedule class, just for holding a whole construction or Timers and Repeat instances. The construction can be as complex as needed and needs to be flexible. Each of these three classes has a .run() method, permitting to go through the whole schedule. Whatever the Class, the .run() method either runs a timer, a repeat group for a certain number of iterations, or a schedule. Is this polymorphism-oriented approach sound or silly? What are other appropriate approaches I should consider to build such a versatile utility that permits to put all building blocks together in as complex a way as desired with simplicity? Thanks! Here is the module code: ##################### ## Importing modules from time import time, sleep ##################### ## Class definitions class Timer: """ Timer object with duration. """ def __init__(self, duration): self.duration = duration def run(self): print "Waiting for %i seconds" % self.duration wait(self.duration) chime() class Repeat: """ Repeat grouped objects for a certain number of repetitions. """ def __init__(self, objects=[], rep=1): self.rep = rep self.objects = objects def run(self): print "Repeating group for %i times" % self.rep for i in xrange(self.rep): for group in self.objects: group.run() class Schedule: """ Groups of timers and repetitions. Maybe redundant with class Repeat. """ def __init__(self, schedule=[]): self.schedule = schedule def run(self): for group in self.schedule: group.run() ######################## ## Function definitions def wait(duration): """ Wait a certain number of seconds. """ time_end = time() + float(duration) #uncoment for minutes# * 60 time_diff = time_end - time() while time_diff > 0: sleep(1) time_diff = time_end - time() def chime(): print "Ding!"

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• Pass table as parameter to SQLCLR TV-UDF

  - by Skeolan

  We have a third-party DLL that can operate on a DataTable of source information and generate some useful values, and we're trying to hook it up through SQLCLR to be callable as a table-valued UDF in SQL Server 2008. Taking the concept here one step further, I would like to program a CLR Table-Valued Function that operates on a table of source data from the DB. I'm pretty sure I understand what needs to happen on the T-SQL side of things; but, what should the method signature look like in the .NET (C#) code? What would be the parameter datatype for "table data from SQL Server?" e.g. /* Setup */ CREATE TYPE InTableType AS TABLE (LocationName VARCHAR(50), Lat FLOAT, Lon FLOAT) GO CREATE TYPE OutTableType AS TABLE (LocationName VARCHAR(50), NeighborName VARCHAR(50), Distance FLOAT) GO CREATE ASSEMBLY myCLRAssembly FROM 'D:\assemblies\myCLR_UDFs.dll' WITH PERMISSION_SET = EXTERNAL_ACCESS GO CREATE FUNCTION GetDistances(@locations InTableType) RETURNS OutTableType AS EXTERNAL NAME myCLRAssembly.GeoDistance.SQLCLRInitMethod GO /* Execution */ DECLARE @myTable InTableType INSERT INTO @myTable(LocationName, Lat, Lon) VALUES('aaa', -50.0, -20.0) INSERT INTO @myTable(LocationName, Lat, Lon) VALUES('bbb', -20.0, -50.0) SELECT * FROM @myTable DECLARE @myResult OutTableType INSERT INTO @myResult MyCLRTVFunction @myTable --returns a table result calculated using the input The lat/lon - distance thing is a silly example that should of course be better handled entirely in SQL; but I hope it illustrates the general intent of table-in - table-out through a table-valued UDF tied to a SQLCLR assembly. I am not certain this is possible; what would the SQLCLRInitMethod method signature look like in the C#? public class GeoDistance { [SqlFunction(FillRowMethodName = "FillRow")] public static IEnumerable SQLCLRInitMethod(<appropriateType> myInputData) { //... } public static void FillRow(...) { //... } } If it's not possible, I know I can use a "context connection=true" SQL connection within the C# code to have the CLR component query for the necessary data given the relevant keys; but that's sensitive to changes in the DB schema. So I hope to just have SQL bundle up all the source data and pass it to the function. Bonus question - assuming this works at all, would it also work with more than one input table?

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• How bad is code using std::basic_string<t> as a contiguous buffer?

  - by BillyONeal

  I know technically the std::basic_string template is not required to have contiguous memory. However, I'm curious how many implementations exist for modern compilers that actually take advantage of this freedom. For example, if one wants code like the following it seems silly to allocate a vector just to turn around instantly and return it as a string: DWORD valueLength = 0; DWORD type; LONG errorCheck = RegQueryValueExW( hWin32, value.c_str(), NULL, &type, NULL, &valueLength); if (errorCheck != ERROR_SUCCESS) WindowsApiException::Throw(errorCheck); else if (valueLength == 0) return std::wstring(); std::wstring buffer; do { buffer.resize(valueLength/sizeof(wchar_t)); errorCheck = RegQueryValueExW( hWin32, value.c_str(), NULL, &type, &buffer[0], &valueLength); } while (errorCheck == ERROR_MORE_DATA); if (errorCheck != ERROR_SUCCESS) WindowsApiException::Throw(errorCheck); return buffer; I know code like this might slightly reduce portability because it implies that std::wstring is contiguous -- but I'm wondering just how unportable that makes this code. Put another way, how may compilers actually take advantage of the freedom having noncontiguous memory allows? Oh: And of course given what the code's doing this only matters for Windows compilers.

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• XSLT: how to ignore unnecessary white space?

  - by arnaud

  Hi, Given this example XML file: <doc> <tag> Hello ! </tag> <tag> My name is John </tag> </doc> And the following XSLT sheet: <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/"> <xsl:for-each select="doc/tag"> <xsl:value-of select="."/> </xsl:for-each> </xsl:template> </xsl:stylesheet> How should I change it in order to ignore line feeds and convert any group of white-space characters to just one space in the items? In other words, I would like to obtain: Hello! My name is John Without all those those silly line feeds. ...the question is how. Thanks in advance !

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• XSLT: how to ignore line feeds?

  - by arnaud

  Hi, Given this example XML file: <doc> <tag> Hello ! </tag> <tag> My name is John </tag> </doc> And the following XSLT sheet: <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/"> <xsl:for-each select="doc/tag"> <xsl:value-of select="."/> </xsl:for-each> </xsl:template> </xsl:stylesheet> How should I change it in order to ignore line feeds in the items? In other words, I would like to obtain: Hello! My name is John Without all those those silly line feeds. ...the question is how. Thanks in advance !

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• UISegmentedControl Best Practice

  - by Neal L

  Hi all, I'm trying to work out the "best" way to use a UISegmentedControl for an iPhone application. I've read a few posts here on stackoverflow and seen a few people's ideas, but I can't quite sort out the best way to do this. The posts I'm referring to are: http://stackoverflow.com/questions/1559794/changing-views-from-uisegmentedcontrol and http://stackoverflow.com/questions/1047114/how-do-i-use-a-uisegmentedcontrol-to-switch-views It would seem that the options are: Add each of the views in IB and lay them out on top of each other then show/hide them Create each of the subviews separately in IB, then create a container in the main view to populate with the subview that you need Set up one really tall or really wide UIView and animate it left/right or up/down depending on the selected segment Use a UITabBarController to swap out the subviews - seems silly For tables, reload the table and in cellForRowAtIndex and populate the table from different data sources or sections based on the segment option selected (not the case for my app) So which approach is best for subview/non-table approaches? Which is the easiest to implement? Could you share some sample code to the approach? Thanks!

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• How to limit speed with BMW JSDK on 116i?

  - by lexicore

  I'm experimenting with the BMW Java SDK on the new BMW 116i Innovation Package. Basic things like turning the lights on and off, starting and stopping the motor work fine. What I'm trying to do now is that to write a carlet which would limit the speed to the maximum configured in the driver profile. Driver identity will be detected as usual via RFID reader. My problem is that though I can read the speed from the tachometer, I can't really limit the speed. Here's what I've got working so far: public class SpeenControllingCarlet extends GenericCarlet { public void start(final VehicleModel model) throws CarletException { RfidReader rfidReader = (RfidReader) model .getDevice(Devices.DRIVER_RFID_READER); Rfid rfid = rfidReader.getRfid(); DriverProfile driverProfile = model.getDriverProfileRegistry() .getDriverProfile(rfid.toString()); if (driverProfile == null) { return; } final Double maxAllowedSpeed = Double.valueOf(driverProfile .getCustomAttribute("maxAllowedSpeed", "190")); Tachometer tachometer = (Tachometer) mode.getDevice(Devices.TACHOMETER); tachometer.addSpeedListener(new SpeedListener() { public void onSpeedChanged(SpeedChangedEvent speedChangedEvent) { if (speedChangedEvent.getCurrentSpeed() > maxAllowedSpeed) { Horn horn = (Horn) mode.getDevice(Devices.HORN); horn.beep(440, 2000); } } }); } } This will just beep for two seconds if the driver goes faster than the driver profile allows. My question is - is there a possibility to actually limit the speed (not just silly beeping)?

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• Having trouble setting up API call using array of parameters

  - by Josh

  I am building a class to send API calls to Rapidshare and return the results of said call. Here's how I want the call to be done: $rs = new rs(); $params = array( 'sub' => 'listfiles_v1', 'type' => 'prem', 'login' => '10347455', 'password' => 'not_real_pass', 'realfolder' => '0', 'fields' => 'filename,downloads,size', ); print_r($rs->apiCall($params)); And here's the class so far: class RS { var $baseUrl = 'http://api.rapidshare.com/cgi-bin/rsapi.cgi?sub='; function apiCall($params) { $newUrl = $baseUrl; $keys = array_keys($params); $count = count($params); for($i = 0; $i < $count; $i++) { $newUrl .= $keys[$i]; $newUrl .= '&'; $newUrl .= $params[$keys[$i]]; } return $newUrl; } } Obviously i'm returning $newUrl and using print_r() to test the query string, and this is what it comes out as with the code shown above: sub&listfiles_v1type&premlogin&10347455password&_not_real_passrealfolder&0fields&filename,downloads,size When it should be: http://api.rapidshare.com/cgi-bin/rsapi.cgi?sub=listfiles_v1&type=prem&login=10347455&password=not_real_pass&realfolder=0&fields=filename,downloads,size Hopefully you can see what I'm trying to do here :P It's probably a silly mistake that I'm failing to find or a logical error. Thanks in advance.

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• Unit testing JSON output module, best practices

  - by Banang

  I am currently working on a module that takes one of our business objects and returns a json representation of that object to the caller. Due to limitations in our environment I am unable to use any existing json writer, so I have written my own, which is then used by the business object writer to serialize my objects. The json writer is tested in a way similar to this @Test public void writeEmptyArrayTest() { String expected = "[ ]"; writer.array().endArray(); assertEquals(expected, writer.toString()); } which is only manageable because of the small output each instruction produces, even though I keep feeling there must be a better way. The problem I am now facing is writing tests for the object writer module, where the output is much larger and much less manageable. The risk of spelling mistakes in the expected strings mucking up my tests seem too great, and writing code in this fashion seems both silly and unmanageable in a long term perspective. I keep feeling like I want to write tests to ensure that my tests are behaving correctly, and this feeling worries me. Therefore, is there a better way of doing this? Surely there must be? Does anyone know of any good literature in regard to this specific case (doesn't have to be json, but you know what I mean)? Grateful for all help.

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• Repackaging Jasper-Reports into an application specific OSGi bundle, legal or not?

  - by Chris

  Hi, I wanted to ask (probably a silly) question regarding the packaging of existing open-source components as OSGi bundles (more specifically Jasper Reports). I have an application that I am converting from a monolithic jar-hell type architecture to something more moduler and OSGi is my weapon of choice. There are various modules I have in mind but one of the modules is a reporting module. My own reporting module will be a jar file containing my code that should reference a Jasper Reports bundle. Trouble is, Jasper reports depends on far far too many libraries and is quite monolithic in its own right. I therefore wish to build my own Jasper Reports bundle but this is where I start getting confused about the legality of repackaging. I don't plan to re-compile but I do plan to re-bundle removing known items that I do not require. Can anyone offer advice on whether I am permitted to repackage (not recompile or extend) open-source libraries into OSGi bundles without falling foul of 'derivative works' clause of LGPL? I noticed that Groovy seems to offer some monolithic jars that include all dependancies and actually goes so far as to re-arrange the packages of its dependancies so that there are no namespace conflicts. This seems to me to be a violation of the license but if anyone can reassure me that this is legal then I would feel safer about my less intrusive custom-bundling of Jasper reports. Thanks for your time, Chris

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• How do I best display CheckBoxes in SQL Server Reporting Services?

  - by Yadyn

  One of the many quirks of Reporting Services we've run across is the complete and utter lack of a CheckBox control or even something remotely similar. We have a form that should appear automatically filled out based on information pulled from a database. We have several bit datatype fields. Printing out "True" or "False" just looks silly, as this is supposed to look like a form that has been auto-filled out, so we want to have a series of checkboxes and labels that are either checked or unchecked. We are running SSRS 2005 but I'm not aware of SSRS 2008 having added a CheckBox control. Even if it did, we'd need to have an alternative for the time being. The best we've found so far is: use Wingdings use images use text boxes with borders and print a blank/space or a capital X All three approaches require IIF expression shenanigans. The Wingdings approach seemed to work acceptably, and was the most aesthetically pleasing except that for whatever reason it didn't always print correctly. More importantly, PDF exports, also for whatever reason, converted all fonts (generally) to Arial and so we got funky letters instead of the Windings dingbats. Images, being a pixel-based raster, don't do so well when printed along side vector stuff like text. Unless handled carefully, they tend to stretch, pixelate, and do other unprofessional looking things. While these methods do work (some with limitations as mentioned above) none of them are particularly elegant. Are we missing something obvious? Not so obvious? Does someone at Microsoft have a good reason why such a control was not provided in SSRS 2000, let alone 2 versions and 8 years later? This can't be the first time this issue has come up...

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• Find the flaws in the concept...

  - by Trindaz

  A web based web browser. Sounds silly right? Here's a use case. All comments about what could go wrong, and if anyone has tried and failed at this, very much wanted User goes to www.theBrowser.com and logs in with credentials specific to theBrowser.com. User tells theBrowser what their username and password for various sites are User goes to theBrowser.com/?uri=somesite.com theBrowser sends off the http request with User's log in details, then sends the http response back to User. This lets theBrowser do weird and wonderful functions like change colours / style sheets / etc. to every site that gets passed through it. From a technical stand point, storing username and password and passing them along is not a challenge for one user, but if there were a few, I'd have to use some kind of server based browser software to store a session per user logged in at theBrowser.com. How could I do that? Will I have to start from scratch? Obviously privacy and security are issues. Would theBrowser.com be too great a risk, even if users are fully warned? Cheers, Dave

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• Creating a new workbook in Excel from Python breaks

  - by Marcelo Cantos

  I am trying to use the stock standard win32com approach to drive Excel 2007 from Python. However, when I try to create a new workbook, things go pear-shaped: Python 2.6.4 (r264:75706, Nov 3 2009, 13:23:17) [MSC v.1500 32 bit (Intel)] on win32 ... >>> import win32com.client >>> excel = win32com.client.Dispatch("Excel.Application") >>> wb = excel.Workbooks.Add() Traceback (most recent call last): File "<pyshell#3>", line 1, in <module> wb = excel.Workbooks.Add() File "C:\Python26\lib\site-packages\win32com\client\dynamic.py", line 467, in __getattr__ if self._olerepr_.mapFuncs.has_key(attr): return self._make_method_(attr) File "C:\Python26\lib\site-packages\win32com\client\dynamic.py", line 295, in _make_method_ methodCodeList = self._olerepr_.MakeFuncMethod(self._olerepr_.mapFuncs[name], methodName,0) File "C:\Python26\lib\site-packages\win32com\client\build.py", line 297, in MakeFuncMethod return self.MakeDispatchFuncMethod(entry, name, bMakeClass) File "C:\Python26\lib\site-packages\win32com\client\build.py", line 318, in MakeDispatchFuncMethod s = linePrefix + 'def ' + name + '(self' + BuildCallList(fdesc, names, defNamedOptArg, defNamedNotOptArg, defUnnamedArg, defOutArg) + '):' File "C:\Python26\lib\site-packages\win32com\client\build.py", line 604, in BuildCallList argName = MakePublicAttributeName(argName) File "C:\Python26\lib\site-packages\win32com\client\build.py", line 542, in MakePublicAttributeName return filter( lambda char: char in valid_identifier_chars, className) File "C:\Python26\lib\site-packages\win32com\client\build.py", line 542, in <lambda> return filter( lambda char: char in valid_identifier_chars, className) UnicodeDecodeError: 'ascii' codec can't decode byte 0x83 in position 52: ordinal not in range(128) >>> What is going wrong here? Have I done something silly, or is Python/win32com/Excel somehow broken?

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• General N-Tier Architecture Question

  - by whatispunk

  In an N-Tier app you're supposed to have a business logic layer and a data access layer. Is it bad to simply have two assemblies: BusinessLogicLayer.dll and DataAccessLayer.dll to handle all this logic? How do you actually represent these layers. It seems silly, the way I've seen it, to have a BusinessLogic class library containing classes like: CustomerBusinessLogic.cs, OrderBusinessLogic.cs, etc. each calling their appropriately named cousin in the DataAccessLayer class library, i.e. CustomerDataAccess.cs, OrderDataAccess.cs. I want to create a web app using MVP and it doesn't seem so cut and dry as this. There are lots of opinions about where the business logic is supposed to be put in MVP and I'm not sure I've found a really great answer yet. I want this project to be easily testable, and I am trying to adhere to TDD methodologies as best I can. I intend to use MSTest and Rhino Mocks for testing. I was thinking of something like the following for my architecture: I'd use LINQ-To-SQL to talk to the database. WCF services to define data contract interfaces for the business logic layer. Then use MVP with ASP.NET Forms for the UI/BLL. Now, this isn't the start of this project, most of the LINQ stuff is already done, so its stuck. The WCF service would replace the existing DataAccessLayer assembly and the UI/BLL would replace the BusinessLogicLayer assembly etc. This sort of makes sense in my head, but its getting really late. Anyone that's traveled down this path have any guidance? Good links? Warnings? Thanks!

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• Circle drawing with SVG's arc path

  - by ????

  The following SVG path can draw 99.99% of a circle: (try it on http://jsfiddle.net/DFhUF/46/ and see if you see 4 arcs or only 2, but note that if it is IE, it is rendered in VML, not SVG, but have the similar issue) M 100 100 a 50 50 0 1 0 0.00001 0 But when it is 99.99999999% of a circle, then nothing will show at all? M 100 800 a 50 50 0 1 0 0.00000001 0 And that's the same with 100% of a circle (it is still an arc, isn't it, just a very complete arc) M 100 800 a 50 50 0 1 0 0 0 How can that be fixed? The reason is I use a function to draw a percentage of an arc, and if I need to "special case" a 99.9999% or 100% arc to use the circle function, that'd be kind of silly. Again, a test case on jsfiddle using RaphaelJS is at http://jsfiddle.net/DFhUF/46/ (and if it is VML on IE 8, even the second circle won't show... you have to change it to 0.01) Update: This is because I am rendering an arc for a score in our system, so 3.3 points get 1/3 of a circle. 0.5 gets half a circle, and 9.9 points get 99% of a circle. But what if there are scores that are 9.99 in our system? Do I have to check whether it is close to 99.999% of a circle, and use an arc function or a circle function accordingly? Then what about a score of 9.9987? Which one to use? It is ridiculous to need to know what kind of scores will map to a "too complete circle" and switch to a circle function, and when it is "a certain 99.9%" of a circle or a 9.9987 score, then use the arc function.

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• A stupid question regarding google gadgets. How to host a google gadget? How it works?

  - by sintaloo

  Hi, I spent 5 hours by checking google gadgets websites and FAQs. maybe I am really stupid. I have no idea how to host a gadget. What I knew from reading the google website: 1, I can write gadget with xml, javascript etc.. 2, gadget can be added to igoogle etc.. 3, google can host the gadget for you. 4, gadget can be hosted at anywhere??? All of the above information doesn't answer my question. For instance, with jQuery or Dojo Toolkit, I can download the javascript framework and use it. With google gadget, I can not find a download link for the framework. Why? Does google provide its framework? If no, why does google website say it can be hosted anywhere? I am totally confused. A download link is nowhere in google-gadget website. A brief explanation or some helpful links are very welcome!! Thanks a lot!!! Please don't blame me if you think this question is too silly.

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• Problem with sfRemember cookie / sfGuard Remember me

  - by Tom

  I'm using Symfony 1.4 with Doctrine. Sorry if this is a silly question but what exactly does one need to build on top of the sfDoctrineGuardPlugin to get the "remember me" functionality working? When I login a user, the sfRemember cookie is created with the default 15-day lifetime, and the remember key is saved in the plugin's sf_guard_remember_key table. Without any tweaks to the plugin, the sfGuardSecurityUser SignIn() method creates the cookie, but the Signout() method erases it, leaving no cookie unless you're logged in! Signin(): sfContext::getInstance()->getResponse()->setCookie($remember_cookie, $key, time() + $expiration_age); Signout(): sfContext::getInstance()->getResponse()->setCookie($remember_cookie, '', time() - $expiration_age); I can see that the database table saves the cookie as a relation of sf_guard_user, but that's not much good if the cookie is gone.... I'd be grateful if someone could tell me what I'm missing here, and ideally, if I prevent the Signout() method from removing the cookie, do I need to write code to read the cookie myself or is this automated somewhere/somehow? I've got box-standard Symfony 1.4 and sfDoctrineGuardPlugin installations. It all just seems totally wrong and the documentation on this is non-existent. Any help would appreciated.

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