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• How to properly clean up Excel interop objects in C#

  - by HAdes

  I'm using the Excel interop in C# (ApplicationClass) and have placed the following code in my finally clause: while (System.Runtime.InteropServices.Marshal.ReleaseComObject(excelSheet) != 0) { } excelSheet = null; GC.Collect(); GC.WaitForPendingFinalizers(); Although, this kind of works the Excel.exe process is still in the background even after I close Excel. It is only released once my application is manually closed. Anyone realize what I am doing wrong, or has an alternative to ensure interop objects are properly disposed of. Thanks.

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• .NET How can i set field value on value type using reflection

  - by soccerazy

  .NET I want to clone a value type's fields. How can i set a field value on a value type using reflection (or something else dynamically)? This works for reference types but not for value types. I understand why but I don't know an alternative. shared function clone(of t)(original as t) as t dim cloned as t 'if class then execute parameterless constructor if getType(t).isClass then cloned = reflector.construct(of t)() dim public_fields = original.getType.getFields() for each field in public_fields dim original_value = field.getValue(original) 'this won't work for value type, but it does work for reference type ??? field.setValue(cloned, original_value) next return cloned end function

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• Multiple skins in ASP.NET MVC using StringTemplate

  - by Jamie

  I am considering the StringTemplate view engine for my ASP.NET MVC application. This application will be built with one skin, but I then expect many more, often very similar skins to be developed for it. This is primiarly the reason for my choice of StringTemplate as the view engine, as there will be zero logic in the views. In my head, I envisaged having each skin in a directory under the 'Views' directory in the folder structure, then maintaining a data structure which maps hostnames to skin directories. An obvious disadvantage of this approach is that I will have to explicitly specify my view files - an alternative might be to hack the implementation of the View() method to change the /views/controller/action standard path and insert an extra layer. Is anyone aware of any examples of implementations along these lines using ASP.NET MVC and StringTemplate at present? Can anyone forsee any potential problems with my approach? Thanks in advance.

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• Changelog file: YAML vs JSON vs CSV

  - by Aziz Light

  Hello everybody. I am creating a simple Changelog lib in CodeIgniter that will basically log a message everytime someone adds, deletes, changes or publish a blog post. I will log messages in files by batches of 300. So every 301st message will go in a new file. At first I wanted to write the logs to simple .log files but then I got the idea to actually style the thing and I had to seperate each "attribute" of each message (ie: the user, the message, the type of the log, etc.). So .log files are out of the question since extracting the info would be a pain. What is the most appropriate format for such a task? I already ruled out MySQL and XML because they are too heavy (especially considering that the log files won't exceed (about) 300 lines). I suggested YAML vs JSON vs CSV in the title, but is there yet a better alternative?

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• NSURL URLWithString: raises exception

  - by Stephen Darlington

  In short, [NSURL URLWithString:] appears to be raising an exception. According to the documentation "If the string was malformed, returns nil." There is no mention of an exception being raised under any circumstance. In addition to this, I am both encoding the URL and checking for nil before converting the string to a URL. Can anyone offer any advice as to which exception it could be or what other error checking I should be doing before converting the URL? In case you're interested in the details, the calling code looks like this: NSString* tmpText = [newUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; if (tmpText == nil) { // error handling } else { NSURL* tmpURL = [NSURL URLWithString:tmpText]; And this is a section from the crash report download from iTunes Connect: 8 libobjc.A.dylib 0x300c1f84 objc_exception_throw 9 CoreFoundation 0x3029a598 +[NSException raise:format:arguments:] 10 CoreFoundation 0x3029a538 +[NSException raise:format:] 11 Foundation 0x30696dde -[NSURL initWithString:relativeToURL:] 12 Foundation 0x30696cd8 +[NSURL URLWithString:relativeToURL:] 13 Foundation 0x30696cae +[NSURL URLWithString:] 14 Yummy 0x000146ca -[DeliciousPostCell setUrl:] + 46 It seems that the URL was in a "bad" format somehow but that should really be returning a nil not an exception. I have never seen the exception being raised myself so I can't use XCode to trap the code and see what's happening. And the user(s) that experienced the problem never contacted me directly so I can't ask for more details. Any suggestions greatly appreciated. Update (14/7/2009): Seems like such a hack, but I added an exception block around the suspect line. I also raised a Radar bug report (#7031551) suggesting that the code should match the documentation.

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• monitoring iphone 3g/wifi bandswitch

  - by user262325

  Hello everyone I hope add the function to monitor iphone used 3g/wifi band switch. I know I can do these in my app, but I wonder if there is way to monitor all band switch usage of iPhone? I noticed that there is an app http://itunes.apple.com/ca/app/download-meter-for-wi-fi-gprs/id327227530?mt=8 It claims: Works with any carrier (iPods are supported too!). Requires no login/password to your carrier's site. Does not require Internet connection to get traffic usage statistics (works even in Airplane mode) because it gets information on traffic from the device, not a carrier; this means it won't cost you anything to view current traffic consumed, even while roaming in a location where traffic is very expensive. Allows the user to adjust consumed traffic for today or the current month to match traffic amounts reported by your carrier. Stats on the screen are updated every second. Measures traffic in real time with up to byte precision. Separates traffic into incoming and outgoing, Wi-Fi traffic and mobile Internet traffic. It looks like it gets the band switch info from carrier site, but they also said it gets info from device. I am really confused. Welcome any comment. Thanks interdev

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• Online Perforce Repositories

  - by Oliver Hume

  Is anyone aware of of anybody offering hosted perforce servers? It doesn't have to be free - but preferably not too expensive! My understanding of Perforce is that it's free to use for personal projects, which mine is. Currently I have a perforce server setup on the same machine as the code is on which doesn't offer much security in case of computer failure. If not, can anyone recommend one of the alternative solutions that is similar to Perforce? I have experience of SVN but cannot say I enjoy the experience.

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• Article search engine in php

  - by Jason

  Hello, I am using sphinx as a search engine on my website its working perfect and I have no complain with it. The only thing it lacks is, it does not allow me to search articles whose query length is more than 15 words. I know in reality people don't use more than 3-4 words i want to use it for finding duplicate contents. I was wondering if there is any alternative solution to sphinx. I want to cope with duplicate contents. My main articles table is in innodb but I am also caching articles into MyISAM table as well for full text searching but when I search an article it takes ages to perform one search. Its not the query problem, i think mysql lacks the fulltext searching facility. Thanks Jason

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• How to execute "eval" without writing "eval" in JavaScript

  - by Infinity

  Here's the deal, we have a big JS library that we want to compress, but YUI compressor doesn't fully compress the code if it finds an "eval" statement, out of fear that it will break something else. That's great and all, but we know exactly what is getting eval'd, so we don't want it to get conservative because there's an eval statement in MooTools JSON.decode So basically the question is, is there any alternative (maybe creative) way of writing a expression that returns the eval function? I tried a few, but no dice: window['eval'](stuff); window['e'+'val'](stuff); // stuff runs in the global scope, we need local scope this['eval'](stuff); // this.eval is not a function (new Function( "with(this) { return " + '(' + stuff + ')' + "}"))() // global scope again Any ideas? Thx

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• document.write issue

  - by Dhana

  I inherited a piece of code that uses document.write to insert a certain div when the code is encountered. Unfortunately, this code is causing issues in IE where the code fails. Is there a way around this to insert a div on the page without it? I can't make a big change since this code is currently used by many clients(it's like google adsense kind of thing). Is there an alternative to document.write - I don't have a way to capture a div on the page since it's something plugged in by anyone.

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• Are there alternatives to UltraWinGrid (for C#)?

  - by MPelletier

  I've been using the Infragistics UltraWinGrid for a while in a C# project, and while it's very spiffy, it is sometimes a bit heavy to run (and editing it in Visual Studio can be hazardous). I'm looking for a lighter alternative. Looks (always a big plus with Infragistics) are not as important as functionality. Namely, I'm looking for a beefed up DataGridView which: has data binding (duh!) has lock control over editing allows for sub-tables on opening a row can have multiple headers to group columns together (say header 1 is composed of "Group A" and "Group B", and header 2 has various columns under each group) has sorting by column (and can sort numbers properly, even if it does not have a stock method at first) has filtering by column (perhaps the most demanding spec) à la UltraWinGrid/Excel (text field with a way to specify if the filter is equal, not equal, greater, lesser, starts with, ends with, etc). supports check box, text box or data bound list/combo box cells allows cells to be merged (not the control cells of course!) can have events bound to each row (say double click)

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• Emacs X11 autocompletion (intellisense)

  - by JC

  Hi everyone, I use visual studio for day to day programming (read putting food in my mouth) but for personal programming (read c/c++ hacking) I use Emacs. Right now I am doing a programming exercise involving the X11 API. I am continually referring to the programming API manual to find the signature of function calls. What would be really nice would be if there was an emacs alternative to the visual studio intellisense. I know there is autocompletion for the language specifics. Is there such an extension available to Emacs? Or if not, is there way of creating one, maybe using the language specifics mechanism already used for auto completion?

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• ITextSharp HTML to PDF?

  - by Kyle

  I posted a question here a few weeks ago asking about an alternative to creating .fdf files to fill in pdf documents and someone here pointed me to ITextSharp. It's working like a champ so thanks for that. I'd now like to know if ITextSharp has the capability of converting HTML to PDF. Everything I will convert will just be plain text but unfortunately there is very little to no documentation on ITextSharp so I can't determine if that will be a viable solution for me. If it can't do it, can someone point me to some good, free .net libraries that can take a simple plain text HTML document and convert it to a pdf? tia.

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• Installing Python Script, Maintaining Reference to Python 2.6

  - by zfranciscus

  Hi, I am writing a Python program that relies on version 2.6. I went through the distribution documentation: http://docs.python.org/distutils/index.html and what I have figure out so far is that I basically need to write a setup.py script. Something like: setup(name='Distutils', version='1.0', description='Python Distribution Utilities', author='My Name', author_email='My Email', url='some URL', package_dir={'': 'src'}, packages=[''], ) I would like to ensure that my program uses 2.6 interpreter library. What would be the best approach to ensure that my program uses 2.6 ? Shall I distribute python 2.6 library along with my program ? Is there any alternative approach ?

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• Visual C#, Large Arrays, and LOH Fragmentation. What is the accepted convention?

  - by Gorchestopher H

  I have an other active question HERE regarding some hopeless memory issues that possibly involve LOH Fragmentation among possibly other unknowns. What my question now is, what is the accepted way of doing things? If my app needs to be done in Visual C#, and needs to deal with large arrays to the tune of int[4000000], how can I not be doomed by the garbage collector's refusal to deal with the LOH? It would seem that I am forced to make any large arrays global, and never use the word "new" around any of them. So, I'm left with ungraceful global arrays with "maxindex" variables instead of neatly sized arrays that get passed around by functions. I've always been told that this was bad practice. What alternative is there? Is there some kind of function to the tune of System.GC.CollectLOH("Seriously") ? Are there possibly some way to outsource garbage collection to something other than System.GC? Anyway, what are the generally accepted rules for dealing with large (85Kb) variables?

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• EXC_BREAKPOINT when starting iPhone app

  - by pgb

  A user of our app sent me the following crash log: Incident Identifier: 59D4D5E7-570A-4047-A679-3016B2A226C4 CrashReporter Key: d8284d671ee22ad17511360ce73409ebfa8b84bb Process: .... [63] Path: /var/mobile/Applications/.... Identifier: ... Version: ??? (???) Code Type: ARM (Native) Parent Process: launchd [1] Date/Time: 2010-03-08 17:00:15.437 -0800 OS Version: iPhone OS 2.2.1 (5H11a) Report Version: 103 Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x00000001, 0xe7ffdefe Crashed Thread: 0 Thread 0 Crashed: 0 dyld 0x2fe01060 dyld_fatal_error + 0 1 dyld 0x2fe088d4 dyld::_main(mach_header const*, unsigned long, int, char const**, char const**, char const**) + 3064 2 dyld 0x2fe0196c dyldbootstrap::start(mach_header const*, int, char const**, long) + 884 3 dyld 0x2fe01048 _dyld_start + 32 Thread 0 crashed with ARM Thread State: r0: 0x2fe23ca0 r1: 0x00000000 r2: 0x2fe23ca0 r3: 0x00000000 r4: 0x2ffff4e0 r5: 0x2ffff4bc r6: 0x2fe005c0 r7: 0x2ffffb00 r8: 0x00000004 r9: 0x2fe57cf0 r10: 0x2fe236c8 r11: 0x00000009 ip: 0x0000018d sp: 0x2ffff5b8 lr: 0x2fe088dc pc: 0x2fe01060 cpsr: 0x00000010 Binary Images: 0x2fe00000 - 0x2fe22fff dyld ??? (???) <f6a50d5f57a676b54276d0ecef46d5f0> /usr/lib/dyld My app uses OpenFeint and PinchMedia analytics. For PinchMedia, I'm linking using their provided .a file, and for OpenFeint, I'm compiling their code (as per their guidelines). The frameworks / libs I'm linking are: UIKit.framework (Weak) MapKit.framework (Weak) Foundation.framework CoreGraphics.framework OpenAL.framework AudioToolbox.framework libsqlite3 SystemConfiguration.framework CoreLocation.framework PinchMedia analytics Security.framework QuartzCore.framework CFNetwork.framework My base SDK is iPhone 3.0, and my Base OS Deployment Target is 2.2.1. There are two things I find weird: The app crashes even before the main method is invoked. The crash log looks exactly like the one posted here: http://stackoverflow.com/questions/2368689/objective-c-iphone-app-exc-breakpoint-sigtrap The user that sent me this crash is using a 2nd gen iPod Touch with OS 2.2.1. I wasn't able to reproduce the issue, but based on the comments in iTunes, it seems that more people is having the same issue.

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• Developing Installer Packages, are Visual Studio Setup Projects suitable for complex setups

  - by Robert

  Are "Visual Studio Setup" Projects suitable for complex setups in different versions? The application is rather large ( 500.000 lines of code) and is under continuous development. Every 6 to 10 month a new version gets released. We have multiple configuration files (INI and XML), registry keys, database migration scripts, etc. The application is in the progress of being migrated from VB6 to .NET . The old installer was build with Installshield. The feedback to Installshield is: Bad adaptability, bad reuse - thats way we are evaluating "Visual Studio Setup" as an alternative. Other products we consider: Free Solutions WiX NSIS Commercial Solutions Installshield (again..) Wise Advanced Installer sth. missing? Solutions we don't like to consider: Inno Setup (It just doesn't feel right)

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• SQL: Return "true" if list of records exists?

  - by User

  An alternative title might be: Check for existence of multiple rows? Using a combination of SQL and C# I want a method to return true if all products in a list exist in a table. If it can be done in all in SQL that would be preferable. I have written a method that returns whether a single productID exists using the following SQL: SELECT productID FROM Products WHERE ProductID = @productID If this returns a row, then the c# method returns true, false otherwise. Now I'm wondering if I have a list of product IDs (not a huge list mind you, normally under 20). How can I write a query that will return a row if all the product id's exist and no row if one or more product id's does not exist? (Maybe something involving "IN" like: SELECT * FROM Products WHERE ProductID IN (1, 10, 100))

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• How to throttle login attemps in Java webapp?

  - by Jörn Zaefferer

  I want to implement an efficient mechanism to throttle login attemps in my Java web application, to prevent brute-force attacks on user accounts. Jeff explained the why, but not the how. Simon Willison showed an implementation in Python for Django: That doesn't really help me along as I can't use memcached nor Django. Porting his ideas from scratch doesn't seem like a great either - I don't want to reinvent the wheel. I found one Java implementation, though it seems rather naiive: Instead of a LRU cache, it just clears all entries after 15 minutes. EHCache could be an alternative for memcached, but I don't have any experience with it and don't really want to intoduce yet another technology if there are better alternatives for this task. So, whats a good way to implement login throttling in Java?

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• Developing FIrebug like web application for CSS things.

  - by vishwanath

  I am developing a web application for web designing. One part of it includes changing CSS styles on the run and saving the same back to server. I see that, first part of my motive is implemented there in firebug, where I can view CSS style rules applied to a particular HTML element and can change them to view the effect. An earlier question at SO lead to me firebug lite source code https://getfirebug.com/firebug-lite-debug.js , which is far less confusing than full version of firebug. My question was that, is there any way I can get documentation of the firebug/firebug lite code which can speed things up for me. After some googling I found out that there is Firebug API http://getfirebug.com/developer/api/firebug1.6/ But don't know how much useful it is for me. Any alternative way to do this is also welcome.

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• HashSet vs. List performance

  - by Michael Damatov

  It's clear that a search performance of the generic HashSet<T> class is higher than of the generic List<T> class. Just compare the hash-based key with the linear approach in the List<T> class. However calculating a hash key may itself take some CPU cycles, so for a small amount of items the linear search can be a real alternative to the HashSet<T>. My question: where is the break-even? To simplify the scenario (and to be fair) let's assume that the List<T> class uses the element's Equals() method to identify an item.

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• Can't get Secondary UITableViewController to display inside a UITabBarController

  - by Paul Johnston

  I've programmatically created a UITabBarController that is loaded in my App Delegate like this: - (void)applicationDidFinishLaunching:(UIApplication *)application { tabBarController = [[UITabBarController alloc] init]; myTableViewController = [[MyTableViewController alloc] init]; UINavigationController *tableNavController = [[[UINavigationController alloc] initWithRootViewController:myTableViewController] autorelease]; myTableViewController.title = @"Tab 1"; [myTableViewController release]; mySecondTableViewController = [[MySecondTableViewController alloc] init]; UINavigationController *table2NavController = [[[UINavigationController alloc] initWithRootViewController:mySecondTableViewController] autorelease]; mySecondTableViewController.title = @"Tab 2"; [mySecondTableViewController release]; tabBarController.viewControllers = [NSArray arrayWithObjects:tableNavController, table2NavController, nil]; [window addSubview:tabBarController.view]; [window makeKeyAndVisible]; } Now the issue I have is that I can get into the views no problem, but when I try and click onto any item in the Table View, I can't get a secondary table view to appear in any tab. The tabs work absolutely fine, just the secondary views. I'm using the code below in my myTableViewController to run when selecting a specific row (the code reaches the HELP line, and crashes)... - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { NSUInteger row = [indexPath row]; // this gets the correct view controller from a list of controllers SecondaryViewController *svc = [self.controllers objectAtIndex:row]; /*** HELP NEEDED WITH THIS LINE ***/ [self.navigationController pushViewController:svc animated:YES]; } Simply put, I'm trying to switch views to the new view controller whilst keeping the tabs available and using the navigation to go back and forth (like in the iTunes App). Any help appreciated. Thanks

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• PDF Text Extraction Approach Using OCR

  - by Jon

  Has anybody attempted to extract text from a PDF using an OCR library and Java? What did you find to be the most reliable library for text extraction. Most of the approaches I've seen (tesseract, GOCR) are C libraries that would require some JNI code to be written. I'm familiar with pdfbox, which is now an Apache incubator project at version 0.8.x, but it's text extraction isn't always accurate. I'm looking for an alternative approach that is somewhat more reliable. I've not tried Asprise JavaPDF yet, in the process of trying that, but wanted to know more about the OCR approach (if it's possible). Any help would be appreciated.

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• Response.TransmitFile() with UNC share (ASP.NET)

  - by frankadelic

  In the comments of this page: http://msdn.microsoft.com/en-us/library/12s31dhy.aspx ..it says that TransmitFile() cannot be used with UNC shares. As far as I can tell, this is the case; I get this error in Event Log when I attempt it: TransmitFile failed. File Name: \\myshare1\e$\file.zip, Impersonation Enabled: 0, Token Valid: 1, HRESULT: 0x8007052e The suggested alternative is to use WriteFile(), however, this is problematic because it loads the file into memory. In my application, the files are 200MB, so this is not going to scale. Is there a method in ASP.NET for streaming files to users that's: scalable (doesn't read entire file into RAM or occupy ASP.NET threads) works with UNC shares Mapping a network drive as a virtual directory is not an option for us. I would like to avoid copying the file to the local web server as well. Thanks

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• Memory management in objective-c

  - by prathumca

  I have this code in one of my classes: - (void) processArray { NSMutableArray* array = [self getArray]; . . . [array release]; array = nil; } - (NSMutableArray*) getArray { //NO 1: NSMutableArray* array = [[NSMutableArray alloc]init]; //NO 2: NSMutableArray* array = [NSMutableArray array]; . . . return array; } NO 1: I create an array and return it. In the processArray method I release it. NO 2: I get an array by simply calling array. As I'm not owner of this, I don't need to release it in the processArray method. Which is the best alternative, NO 1 or NO 2? Or is there a better solution for this?

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