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Unable to debug simple Java application in Eclipse. Cannot connect to VM. AGENT_ERROR_TRANSPORT_INIT(197)

- by Heptaparaparshi

When i try to debug a simple application in Eclipse i receive a following error: Cannot connect to VM com.sun.jdi.connect.TransportTimeoutException And console provides me with a lonely string: FATAL ERROR in native method: JDWP No transports initialized, jvmtiError=AGENT_ERROR_TRANSPORT_INIT(197) I have JRE 1.6, JRE 1.7 and JDK 1.7 installed. Tried all of them. I've seen tons of same topics, but not a single answer helped me to solve my issue. Here they are: 1) Disable Firewall. Doesn't help. I have latest Avast ver. 9.0 at the moment. I'm a bit suspicious about that software, because before updating my Avast i was able to debug in Eclipse. I think it may cause this error, but i do not have direct clues :). I may ping my machine, firewall doesn't block Eclipse traffic, etc. 2) Add strings to hosts file. No reaction. ::1 localhost.localdomain localhost 127.0.0.1 localhost 3) Changing Network Settings in Java Control Panel to "Direct" connection. Doubtful advice. Also read that thing: http://wiki.eclipse.org/Debug/FAQ Can anyone help me to find out what is happening? Or guide me in the right direction?

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Hopcroft–Karp algorithm in Python

- by Simon

I am trying to implement the Hopcroft Karp algorithm in Python using networkx as graph representation. Currently I am as far as this: #Algorithms for bipartite graphs import networkx as nx import collections class HopcroftKarp(object): INFINITY = -1 def __init__(self, G): self.G = G def match(self): self.N1, self.N2 = self.partition() self.pair = {} self.dist = {} self.q = collections.deque() #init for v in self.G: self.pair[v] = None self.dist[v] = HopcroftKarp.INFINITY matching = 0 while self.bfs(): for v in self.N1: if self.pair[v] and self.dfs(v): matching = matching + 1 return matching def dfs(self, v): if v != None: for u in self.G.neighbors_iter(v): if self.dist[ self.pair[u] ] == self.dist[v] + 1 and self.dfs(self.pair[u]): self.pair[u] = v self.pair[v] = u return True self.dist[v] = HopcroftKarp.INFINITY return False return True def bfs(self): for v in self.N1: if self.pair[v] == None: self.dist[v] = 0 self.q.append(v) else: self.dist[v] = HopcroftKarp.INFINITY self.dist[None] = HopcroftKarp.INFINITY while len(self.q) > 0: v = self.q.pop() if v != None: for u in self.G.neighbors_iter(v): if self.dist[ self.pair[u] ] == HopcroftKarp.INFINITY: self.dist[ self.pair[u] ] = self.dist[v] + 1 self.q.append(self.pair[u]) return self.dist[None] != HopcroftKarp.INFINITY def partition(self): return nx.bipartite_sets(self.G) The algorithm is taken from http://en.wikipedia.org/wiki/Hopcroft%E2%80%93Karp_algorithm However it does not work. I use the following test code G = nx.Graph([ (1,"a"), (1,"c"), (2,"a"), (2,"b"), (3,"a"), (3,"c"), (4,"d"), (4,"e"),(4,"f"),(4,"g"), (5,"b"), (5,"c"), (6,"c"), (6,"d") ]) matching = HopcroftKarp(G).match() print matching Unfortunately this does not work, I end up in an endless loop :(. Can someone spot the error, I am out of ideas and I must admit that I have not yet fully understand the algorithm, so it is mostly an implementation of the pseudo code on wikipedia

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Code Golf: Code 39 Bar Code

- by gwell

The challenge The shortest code by character count to draw an ASCII representation of a Code 39 bar code. Wikipedia article about Code 39: http://en.wikipedia.org/wiki/Code_39 Input The input will be a string of legal characters for Code 39 bar codes. This means 43 characters are valid: 0-9 A-Z (space) and -.$/+%. The * character will not appear in the input as it is used as the start and stop characters. Output Each character encoded in Code 39 bar codes have nine elements, five bars and four spaces. Bars will be represented with # characters, and spaces will be represented with the space character. Three of the nine elements will be wide. The narrow elements will be one character wide, and the wide elements will be three characters wide. A inter-character space of a single space should be added between each character pattern. The pattern should be repeated so that the height of the bar code is eight characters high. The start/stop character * (bWbwBwBwb) would be represented like this: # # ### ### # # # ### ### # # # ### ### # # # ### ### # # # ### ### # # # ### ### # # # ### ### # # # ### ### # ^ ^ ^^ ^ ^ ^ ^^^ | | || | | | ||| narrow bar -+ | || | | | ||| wide space ---+ || | | | ||| narrow bar -----+| | | | ||| narrow space ------+ | | | ||| wide bar --------+ | | ||| narrow space ----------+ | ||| wide bar ------------+ ||| narrow space --------------+|| narrow bar ---------------+| inter-character space ----------------+ The start and stop character * will need to be output at the start and end of the bar code. No quiet space will need to be included before or after the bar code. No check digit will need to be calculated. Full ASCII Code39 encoding is not required, just the standard 43 characters. No text needs to be printed below the ASCII bar code representation to identify the output contents. The character # can be replaced with another character of higher density if wanted. Using the full block character U+2588, would allow the bar code to actually scan when printed. Test cases Input: ABC Output: # # ### ### # ### # # # ### # ### # # ### ### ### # # # # # ### ### # # # ### ### # ### # # # ### # ### # # ### ### ### # # # # # ### ### # # # ### ### # ### # # # ### # ### # # ### ### ### # # # # # ### ### # # # ### ### # ### # # # ### # ### # # ### ### ### # # # # # ### ### # # # ### ### # ### # # # ### # ### # # ### ### ### # # # # # ### ### # # # ### ### # ### # # # ### # ### # # ### ### ### # # # # # ### ### # # # ### ### # ### # # # ### # ### # # ### ### ### # # # # # ### ### # # # ### ### # ### # # # ### # ### # # ### ### ### # # # # # ### ### # Input: 1/3 Output: # # ### ### # ### # # # ### # # # # # ### ### # # # # # ### ### # # # ### ### # ### # # # ### # # # # # ### ### # # # # # ### ### # # # ### ### # ### # # # ### # # # # # ### ### # # # # # ### ### # # # ### ### # ### # # # ### # # # # # ### ### # # # # # ### ### # # # ### ### # ### # # # ### # # # # # ### ### # # # # # ### ### # # # ### ### # ### # # # ### # # # # # ### ### # # # # # ### ### # # # ### ### # ### # # # ### # # # # # ### ### # # # # # ### ### # # # ### ### # ### # # # ### # # # # # ### ### # # # # # ### ### # Input: - $ (minus space dollar) Output: # # ### ### # # # # ### ### # ### # ### # # # # # # # # ### ### # # # ### ### # # # # ### ### # ### # ### # # # # # # # # ### ### # # # ### ### # # # # ### ### # ### # ### # # # # # # # # ### ### # # # ### ### # # # # ### ### # ### # ### # # # # # # # # ### ### # # # ### ### # # # # ### ### # ### # ### # # # # # # # # ### ### # # # ### ### # # # # ### ### # ### # ### # # # # # # # # ### ### # # # ### ### # # # # ### ### # ### # ### # # # # # # # # ### ### # # # ### ### # # # # ### ### # ### # ### # # # # # # # # ### ### # Code count includes input/output (full program).

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jqtouch / google maps api v3 issue

- by Rigo Vides

Hi everyone, I'm having a hard time triying to make jQtouch and Google Maps api V3 together. I've tried almost everything. It seems that the only source of information is here I checked every single post. I'm starting with jQuery and css... so there's a lot of stuff I don't understand. First of all, I'm using jQtouch framework to build a web app with google maps integration, the problem is that whenever I pan the map, strange flickering occurs. It's like jQtouch and the map are trying to fight for a callback. I'm using the latest revision out there. And have several bugs, regarding transition/animation functionality (since I don't wrap the map and all the element's divs within the #jqt wrapper) and css issues with some styling. Anyone has successfully achieve a functional setup build for this scenario? (google maps api v3 & jqtouch), I think is not necessary to paste you some code (But if you think is necessary please let me know and I'll do it), If you paste me a minimal example with a map (detailing jqtouch version, and modification to the styles/.js files), and some transition back and forth from the map to another div/section/page, you'll get the bounty. Thanks a lot in advance. And please, let me know if this is kind of 'legal' here, I mean, there's too loose information on the official wiki, and like 13 'solutions' but nothing concrete... I'm just triying to help anyone who step on in this problem in the future.

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Can somebody explain the differences, status and future of the various ASP.NET AJAX libraries and to

- by tjrobinson

I'm confused about the differences and relationships between the various Microsoft ASP.NET AJAX components/libraries/toolkits and particularly the naming of them. It starts off relatively simple with ASP.NET AJAX itself: ASP.NET AJAX 1.0 (available for ASP.NET 2.0 in a separate package called ASP.NET 1.0 Extensions) ASP.NET AJAX 3.5 (included with ASP.NET 3.5) ASP.NET AJAX 4.0 (included with ASP.NET 4.0) Then come the various projects on CodePlex and elsewhere: ASP.NET AJAX Control Toolkit (aka Original Ajax Control Toolkit) Samples CodePlex It seems that the September 2009 Release is the final release of the Original Ajax Control Toolkit and that it's been superseded by... Ajax Control Toolkit in ASP.NET Ajax Library It looks like the old ASP.NET AJAX Control Toolkit has now become part of a larger ASP.NET Ajax Library but is still maintained seperately on CodePlex. This release is in beta at time of writing so presumably if I want to use the "Control Toolkit" I should stick with the September 2009 Release of the Original ASP.NET AJAX Control Toolkit CodePlex Microsoft Ajax Library Preview Is this the same as the ASP.NET Ajax Library mentioned above just with a confusing name variation? Is the "Control Toolkit" included in Preview 6 and is it older newer or older than the code in Ajax Control Toolkit in ASP.NET Ajax Library? CodePlex Microsoft ASP.NET Ajax Wiki - note the inconsistent insertion of ASP.NET into the name Links to useful articles, roadmaps would be useful.

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Write-only collections in MongoDB

- by rcoder

I'm currently using MongoDB to record application logs, and while I'm quite happy with both the performance and with being able to dump arbitrary structured data into log records, I'm troubled by the mutability of log records once stored. In a traditional database, I would structure the grants for my log tables such that the application user had INSERT and SELECT privileges, but not UPDATE or DELETE. Similarly, in CouchDB, I could write a update validator function that rejected all attempts to modify an existing document. However, I've been unable to find a way to restrict operations on a MongoDB database or collection beyond the three access levels (no access, read-only, "god mode") documented in the security topic on the MongoDB wiki. Has anyone else deployed MongoDB as a document store in a setting where immutability (or at least change tracking) for documents was a requirement? What tricks or techniques did you use to ensure that poorly-written or malicious application code could not modify or destroy existing log records? Do I need to wrap my MongoDB logging in a service layer that enforces the write-only policy, or can I use some combination of configuration, query hacking, and replication to ensure a consistent, audit-able record is maintained?

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Grep failing with Emacs (windows), and GnuWin32 Grep

- by Andy

Hi, I've downloaded and installed the GnuWin32 tools, and added the grep executables to the Emacs bin. I've also, for what its worth, added the GnuWin32 bin folder to my Path variable. Problem is though, when I try and run with suggested grep commands, I always get: Grep exited abnormally with code 53 at Wed Feb 24 17:16:12 For the life of me, I can't find any reference to error code 53 anywhere! :( I've tried the exact examples on a number of websites for example, when I enter: M-x grep <ret> It comes up with Run grep (like this): grep -n Which is fine, but I have no idea of what parameters it expects. I've tried some in some tuorials, but I get error code 53 again! One of the things I've tried is straight from the emacs wiki (http://www.emacswiki.org/emacs/GrepMode#toc2) (maybe not for the windows version though?) and it says to try this command: M-x grep -n -e setq ~/.emacs Which I've tried and I get: -*- mode: grep; default-directory: "c:/[My Directory]/" -*- Grep started at Wed Feb 24 17:30:47 grep -n -e setq ~/.emacs NUL Grep exited abnormally with code 53 at Wed Feb 24 17:30:47 So frustrating as this is meant to be a powerful feature of Emacs and I'm really trying to learn it as I've heard good things about it! Any help would be appreciated! :) Andy UPDATE From the suggestion below, I've tried it via command line and it seems to work fine, perhaps there some config I'm UPDATE I've found the command M-x Occur which seems to do much the same as I would image grep does. Are there many extra benefits to using grep over occur if I can't get this working?

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Blind down animation on CALayer using a mask

- by dgjones346

Hi there, I want to create a "blind down" effect on an image so the image "blinds down" and appears. Sort of like this JavaScript transition: http://wiki.github.com/madrobby/scriptaculous/effect-blinddown The mask is setup correctly because if I manually change it's position it hides and reveals the image behind it, but it doesn't animate! It just ends up in the animates final position and you never see it actual blind. Please help! Maybe this isn't the best way to achieve a blind down effect? // create a new layer CALayer *numberLayer = [[CALayer alloc] init]; // render the number "7" on the layer UIImage *image = [UIImage imageNamed:@"number-7.png"]; numberLayer.contents = (id) [image CGImage]; numberLayer.bounds = CGRectMake(0, 0, image.size.width, image.size.height); // width and height are 50 numberLayer.position = position; // create a new mask that is 50x50 the size of the image CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init]; CGMutablePathRef path = CGPathCreateMutable(); CGPathAddRect(path, nil, CGRectMake(0, 0, 50, 50)); [maskLayer setPath:path]; [maskLayer setFillColor:[[UIColor whiteColor] CGColor]]; [theLayer setMask:maskLayer]; [maskLayer setPosition:CGPointMake(0, 0)]; // place the mask over the image [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:3.0]; [maskLayer setPosition:CGPointMake(0, 50)]; // slide mask off the image // this should shift the blind away in an animation // but it doesn't animate [UIView commitAnimations]; [maskLayer release]; [boardLayer addSublayer:numberLayer]; [numberLayer release];

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JSON-RPC and Json-rpc service discovery specifications

- by Artyom

Hello, I'm going to implement JSON-PRC web service. I need specifications for this. So far I had found only one resource that can be called as real specifications: JSON-RPC 1.0 http://json-rpc.org/wiki/specification Proposal of JSON-PRC 2.0: http://groups.google.com/group/json-rpc/web/json-rpc-2-0 (why is it on google groups?) However I've seen that JavaScript frameworks like Dojo actively use JSON-RPC SMD Service Mapping Description proposal But it requires JSON Schema specifications, but it redirects to incorrect URL as reference. So far I had found following: http://tools.ietf.org/html/draft-zyp-json-schema-02 And it is still draft... Can anybody point me to some actual specifications... At least something official updated? Because it looks like that implementing JSON-RPC 1.0 as is may be not enough, at least for frameworks like Dojo. Or am I wrong? Questions: Would implementation of JSON-RPC 1.0 specifications be enough to provide JSON-RPC service for most of modern clients, and how many clients there (if at-all) that actually support beyond JSON-RPC 1.0 capabilities (SMD, Schema, 2.0)? Because it looks like that JSON-RPC 1.0 is only one that has official specifications (and not draft) If I should implement SMD, or it is recommended can somebody point to official, most recent specifications of Json Schema and Service Mapping Description or links I found are really "the specifications?" Are JSON-RPC 2.0, SMD and JSON-Schema drafts stable enough to implement them? Note: do not suggest existing JSON-RPC service implementations. Anybody?

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Ideas for OpenSource CMS in ASP.NET MVC

- by rajesh pillai

I am in the process of collecting ideas for building an opensource CMS based on ASP.net framework. I have choosen ASP.NET MVC with Jquery as the tool to develop this. I have made this as community wiki. Background: Most of the good CMS that is available is built on PHP, though off late CMS built on ASP.net framework seems to be cropping up. I would like to collect ideas/suggestion/expectations from an opensource CMS system for ASP.net platform. I am looking for expectation from technology and features that you wish could find in a modern CMS and any other thoughts/ideas that comes to your mind. Your input would be of great help in this direction. Meanwhile I am also reviewing many opensource CMS system built on ASP.net as well as MS Office Sharepoint to get ideas and I would update my findings here for your reference. The following are some of the opensource CMS/BlogEngines that I am in the process of reviewing. -Oxite (ASP.net MVC) : This is the new kid on the block -Wordpress -BlogEngine.net -Umbraco Some of the features that I can think of is noted below Simplified content creation Support Multiple content author Metadata feature Workflow engine Simplified deployment List based contents (sharepoint like) Customizable URL's Support content Caching Roles (contenauthor, contentpublisher etc) Support different types of content (like html, txt, document, image, videos) Skinnable (support extensible themes) Localization & Globalization Unlimited nesting of categories Readymade template for blog, forums,survey. Good documentation You can add your points or add some depth to any of the above feature.

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Full JSON-RPC specifications

- by Artyom

Hello, I'm going to implement JSON-PRC web service. I need specifications for this. So far I had found only one resource that can be called as real specifications: JSON-RPC 1.0 http://json-rpc.org/wiki/specification Proposal of JSON-PRC 2.0: http://groups.google.com/group/json-rpc/web/json-rpc-2-0 (why is it on google groups?) However I've seen that JavaScript frameworks like Dojo actively use JSON-RPC SMD Service Mapping Description proposal But it requires JSON Schema specifications, but it redirects to incorrect URL as reference. So far I had found following: http://tools.ietf.org/html/draft-zyp-json-schema-02 And it is still draft... Can anybody point me to spome actual specifications... At least something official updated? Because it looks like that implementing JSON-RPC 1.0 and 2.0 would not be enought, at least for frameworks like Dojo. Or am I wrong? Questions: Is it enough to implement JSON-RPC 1.0 specifications and 2.0 draft to be on safe side, would this work for most JSON-RPC clients? If I should implement SMD, or it is recommended can somebody point to official specifications of Json Schema and Service Mapping Description or links I found are really "specifications?" Note: do not suggest existing JSON-RPC service implementations.

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[Ruby] [gem] A GEM error shown during run the commend: gem update --system

- by Alex

I’m a freshman on Ruby and now trying to install ruby on my machine according to the Tutorial on http://wiki.openqa.org/display/WTR/Tutorial However, after I installed the ruby186-26, and run the command “gem update --system”, the following error occurred: C:\Documents and Settings\e482090\Desktopgem update --system c:/ruby/lib/ruby/site_ruby/1.8/rubygems/config_file.rb:51:in initialize': Inval id argument - <Not Set>/.gemrc (Errno::EINVAL) from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/config_file.rb:51:inopen' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/config_file.rb:51:in initi alize' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:36:innew' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:36:in do_con figuration' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:25:inrun' from c:/ruby/bin/gem:23 C:\Documents and Settings\e482090\Desktopgem install watir c:/ruby/lib/ruby/site_ruby/1.8/rubygems/config_file.rb:51:in initialize': Inval id argument - <Not Set>/.gemrc (Errno::EINVAL) from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/config_file.rb:51:inopen' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/config_file.rb:51:in initi alize' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:36:innew' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:36:in do_con figuration' from c:/ruby/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:25:inrun' from c:/ruby/bin/gem:23 Meanwhile, we have tried this on other machines and the result turned out ok. Thus, my question is why the error happened on my pc? Have you met this kind of error before?

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How to stream partial content with ASP.NET MVC FileStreamResult

- by o_o

We're using a FileStreamResult to provide video data to a Silverlight MediaElement based video player: public ActionResult Preview(Guid id) { return new FileStreamResult( Services.AssetStore.GetStream(id, ContentType.Preview), "application/octet-stream"); } Unfortunately, the Silverlight video player downloads the entire video file before it starts playing. This behavior is expected as our Preview Action does not support downloading partial content. (side note: if the file is hosted in an IIS virtual directory we can start playback at any location in the video while it is still downloading. however for security and auditing reasons we can't provide a direct download link. so this is not an option.) How can we improve the Controller Action to support partial HTTP content? I assume we first have to inform the client that we support it (adding an "Accept-Ranges:bytes" header to a HEAD request), then we have to evaluate the HTTP "Range" header and stream the requested file range with a response code of 206. Will that work with ASP.NET MVC hosted on IIS6? Is there already some code available? Also see: http://en.wikipedia.org/wiki/List_of_HTTP_headers http://blogs.msdn.com/anilkumargupta/archive/2009/04/29/downloadprogress-downloadprogressoffset-and-bufferprogress-of-the-mediaelement.aspx http://benramsey.com/archives/206-partial-content-and-range-requests/

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NHibernate DuplicateMappingException when mapping abstract class and subclass

- by stiank81

I have an abstract class, and subclasses of this, and I want to map this to my database using NHibernate. I'm using Fluent, and read on the wiki how to do the mapping. But when I add the mapping of the subclass an NHibernate.DuplicateMappingException is thrown when it is mapping. Why? Here are my (simplified) classes: public abstract class FieldValue { public int Id { get; set; } public abstract object Value { get; set; } } public class StringFieldValue : FieldValue { public string ValueAsString { get; set; } public override object Value { get { return ValueAsString; } set { ValueAsString = (string)value; } } } And the mappings: public class FieldValueMapping : ClassMap<FieldValue> { public FieldValueMapping() { Id(m => m.Id).GeneratedBy.HiLo("1"); // DiscriminateSubClassesOnColumn("type"); } } public class StringValueMapping : SubclassMap<StringFieldValue> { public StringValueMapping() { Map(m => m.ValueAsString).Length(100); } } And the exception: NHibernate.MappingException : Could not compile the mapping document: (XmlDocument) ---- NHibernate.DuplicateMappingException : Duplicate class/entity mapping NamespacePath.StringFieldValue Any ideas?

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converted javascript to fbjs - tabs still not working

- by JohnMerlino

Hey all, I tried my best to convert javascript to fbjs according to this page: http://wiki.developers.facebook.com/index.php/FBJS. Yet my tabs are still not working properly. Does anyone have any suggestions how to fix this so I can click through the tabs and display and hide content accordingly: <script type="text/javascript"></script> Thanks for any response.

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Metaprogramming - self explanatory code - tutorials, articles, books

- by elena

Hello everybody, I am looking into improving my programming skils (actually I try to do my best to suck less each year, as our Jeff Atwood put it), so I was thinking into reading stuff about metaprogramming and self explanatory code. I am looking for something like an idiot's guide to this (free books for download, online resources). Also I want more than your average wiki page and also something language agnostic or preferably with Java examples. Do you know of such resources that will allow to efficiently put all of it into practice (I know experience has a lot to say in all of this but i kind of want to build experience avoiding the flow bad decisions - experience - good decisions)? EDIT: Something of the likes of this example from the Pragmatic Programmer: ...implement a mini-language to control a simple drawing package... The language consists of single-letter commands. Some commands are followed by a single number. For example, the following input would draw a rectangle: P 2 # select pen 2 D # pen down W 2 # draw west 2cm N 1 # then north 1 E 2 # then east 2 S 1 # then back south U # pen up Thank you!

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HTML 4, HTML 5, XHTML, MIME types - the definitive resource

- by deceze

The topics of HTML vs. XHTML and XHTML as text/html vs. XHTML as XHTML are quite complex. Unfortunately it's hard to get a complete picture, since information is spread mostly in bits and pieces around the web or is buried deep in W3C tech jargon. In addition there's some misinformation being circulated. I propose to make this the definite SO resource about the topic, describing the most important aspects of: HTML 4 HTML 5 XHTML 1.0/1.1 as text/html XHTML 1.0/1.1 as XHTML What are the practical implications of each? What are common pitfalls? What is the importance of proper MIME types for each? How do different browsers handle them? I'd like to see one answer per technology. I'm making this a community wiki, so rather than contributing redundant answers, please edit answers to complete the picture. Feel free to start with stubs. Also feel free to edit this question.

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What are common anti-patterns when using VBA

- by Ahmad

I have being coding a lot in VBA lately (maintenance and new code), specifically with regards to Excel automation etc. = macros. Typically most of this has revolved around copy/paste, send some emails, import some files etc. but eventually just ends up as a Big ball of mud As a person who values clean code, I find it very difficult to produce 'decent' code when using VBA. I think that in most cases, this is a direct result of the macro-recorder. Very helpful to get you started, but most times, there are one too many lines of code that achieve the end result. Edit: The code from the macro-recorder is used as a base to get started, but is not used in its entirety in the end result I have already created a common addin that has my commonly used subroutines and some utility classes in an early attempt to enforce some DRYness - so this I think is a step in the right direction. But I feel as if it's a constant square peg, round hole situation. The wiki has an extensive list of common anti-patterns and what scared me the most was how many I have implemented in one way or another. The question Now considering, that my mindset is OO design, what some common anti-patterns and the possible solutions when designing a solution (think of this - how would designing a solution using Excel and VBA be different from say a .net/java/php/.../ etc solution) ; and when doing common tasks like copying data, emailing, data importing, file operations... etc An anti-pattern as defined by Wikipedia is: In software engineering, an anti-pattern (or antipattern) is a pattern that may be commonly used but is ineffective and/or counterproductive in practice

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Recover files from corrupt filesystem

- by Emile 81

My situation: I have an older 80GB IDE internal hdd, with a few files on that I would like very much to recover: some word documents some latex documents (text files) and pictures (png, jpg, eps files) some other text documents and visual studio project files I had backed them (not the latex ones though) up using svn, but have not committed lately, and would loose a lot of work if I cant recover. the hdd seems to have lost its filesystem, i have no idea how it came about. I know it has/had 3 NTFS partitions, i know the files i want are on the second or third partition. I read http://superuser.com/questions/81877/recover-hard-disk-data Partition Find and Mount did not see all the partitions using intelligent scan TestDisk does (i think), I followed the step by step instructions here, but when I try to list the files it says: "Can't open filesystem, filesystem seems damaged." I'm not sure how to proceed here, as TestDisks wiki does not contain this error message afaik. I don't know if the hdd is gonna fail, or some prog has caused the filesystem to be corrupt, the hdd doesnt make a sound, so i guess that's good. I would like some guidance so I don't accidentally cause more damage. (eg. is it ok to let testdisk write the filesystem to disk? I'm pretty the partitions are listed ok, but not 100%)

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Force-directed graphing

- by David

Hello, I'm trying to write a force-directed or force-atlas code base for a graphing application I'm building for myself. Here is an example of what I'm attempting: http://sawamuland.com/flash/graph.html I managed to find some pseudo code to accomplish what I'd like on the Wiki Force-atlas article. I've converted this into ActionScript 3.0 code since it's a Flash application. Here is my source: var timestep:int = 0; var damping:int = 0; var total_kinetic_engery:int = 0; for (var node in list) { var net_force:int = 0; for (var other_node in list) { net_force += coulombRepulsion(node, other_node, nodeList); } for (var spring in list[node].relations) { net_force += hookeAttraction(node, spring, nodeList); } list[node].velocity += (timestep * net_force) * damping; list[node].position += timestep * list[node].velocity; total_kinetic_engery += list[node].mass * (list[node].velocity) ^ 2; } The problem now is finding pseudo code or a function to perform the the coulomb repulsion and hooke attraction code. I'm not exactly sure how to accomplish this. Does anyone know of a good reference I can look at...understand and implement quickly? Best.

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Links on SharePoint 2010 Master Page not changed based on Alternate Access Mappings

- by victor_c

We are creating a custom branded Master Page in SharePoint 2010. To make the page similar to a legacy page we have implemented an html based custom dropdown navigation menu we had in place directly on the Master Page (consisted of basic HTML elements ULs and LIs with A tags styled with a CSS class). I assumed the links from the basic HTML on the page would be subject to Alternate Access Mappings currently in place, but it seems to not be the case. On a test page opened in 3 different URLs (http://sharepoint2010, http://sharepoint2010.mydomain.com, https://sharepoint2010.mydomain.com) the links from a WIKI page are modified as I expected, but the links from the Custom Navigation Menu (plain HTML on the Master Page) are not modified. I can see where that would be useful... But is there a way that I can add links on the MasterPage in a way that SharePoint parses them first, making them subject to Alternate Access Mapping translation? I tried placing a link inside a SPLinkButton control, but it didn't achieve the desired behavior. e.g. <ul id="navmenu"> <li><SharePoint:SPLinkButton runat="server" NavigateUrl="http://sharepoint2010">sharepoint link</SharePoint:SPLinkButton></li> <li><a href="http://sharepoint2010">sharepoint2010</a></li> <li>test</li> </ul> When I access the page via https://sharepoint2010.mydomain.com the links above are still http://sharepoint2010 rather than https://sharepoint2010.mydomain.com Any thoughts? Thanks, Victor

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Code Trivia: optimize the code for multiple nested loops

- by CodeToGlory

I came across this code today and wondering what are some of the ways we can optimize it. Obviously the model is hard to change as it is legacy, but interested in getting opinions. Changed some names around and blurred out some core logic to protect. private static Payment FindPayment(Order order, Customer customer, int paymentId) { Payment payment = Order.Payments.FindById(paymentId); if (payment != null) { if (payment.RefundPayment == null) { return payment; } if (String.Compare(payment.RefundPayment, "refund", true) != 0 ) { return payment; } } Payment finalPayment = null; foreach (Payment testpayment in Order.payments) { if (testPayment.Customer.Name != customer.Name){continue;} if (testPayment.Cancelled) { continue; } if (testPayment.RefundPayment != null) { if (String.Compare(testPayment.RefundPayment, "refund", true) == 0 ) { continue; } } if (finalPayment == null) { finalPayment = testPayment; } else { if (testPayment.Value > finalPayment.Value) { finalPayment = testPayment; } } } if (finalPayment == null) { return payment; } return finalPayment; } Making this a wiki so code enthusiasts can answer without worrying about points.

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Best Diff Tool?

- by ila

For all my present Diff / Merge needs I'm using Beyond Compare; when I decided to buy a license for it I tried other similar tools, both payware and freeware. Now BC is at version 3, and I think it's a great tool... but what are your experience in this field? Do you think there is something better? And what are the feature you like best on your favorite Diff tool? EDIT I'm recollecting here a list of the tools mentioned in the answers below, in order of preferences (more or less), separating pay- from free- ware and indicating supported operating system. Hope this helps. PAYWARE Beyond Compare (win + linux) - http://www.scootersoftware.com/ Araxis Merge (win + osX) - http://www.araxis.com/merge/index.html ExamDiff Pro (win) - http://www.prestosoft.com/edp_examdiffpro.asp ECMerge (win, osX, linux) - http://www.elliecomputing.com/Home/default.asp MergePlant (win) - http://www.mikado-ltd.com/ Changes (OSX) http://www.changesapp.com Deltopia DeltaWalker (win, osx, linux) http://www.deltopia.com/ FREEWARE FileMerge (OSX) - http://en.wikipedia.org/wiki/Apple_Developer_Tools#FileMerge Tortoise SVN (win) - http://tortoisesvn.net/ WinMerge (win) - http://winmerge.org/ ExamDiff (win) - http://www.prestosoft.com/ps.asp?page=edp_examdiff Diff Merge from SourceGear - http://www.sourcegear.com/diffmerge/index.html Perforce Merge (win + linux + OSX) - http://www.perforce.com/perforce/products/merge.html meld (linux) - sudo apt-get install meld http://meld.sourceforge.net/ Vimdiff - vim distribution KDiff3 - http://kdiff3.sf.net/ ediff - EMacs distribution Tiny Hexer Kompare (KDE, linux) - http://www.caffeinated.me.uk/kompare/ tkdiff (win, linux, osX) - http://tkdiff.sourceforge.net

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easy_install ReviewBoard [Errno 104] Connection reset by peer

- by blastthisinferno

I have a Kubuntu 10.04 VM image and am trying to install ReviewBoard by following The Linux Installation Wiki. When I get to the step to easy_install ReviewBoard, I encounter a problem I cannot find a solution to. Below is the console output: sudo easy_install ReviewBoard Searching for ReviewBoard Best match: ReviewBoard 1.0.8 Processing ReviewBoard-1.0.8-py2.6.egg ReviewBoard 1.0.8 is already the active version in easy-install.pth Installing rb-site script to /usr/local/bin Using /usr/local/lib/python2.6/dist-packages/ReviewBoard-1.0.8-py2.6.egg Processing dependencies for ReviewBoard Searching for pytz Reading http://downloads.reviewboard.org/mirror/ Download error: [Errno 104] Connection reset by peer -- Some packages may not be found! Reading http://downloads.reviewboard.org/releases/ReviewBoard/1.0/ Download error: [Errno 104] Connection reset by peer -- Some packages may not be found! Reading http://pypi.python.org/simple/pytz/ Download error: [Errno 104] Connection reset by peer -- Some packages may not be found! Reading http://pypi.python.org/simple/pytz/ Download error: [Errno 104] Connection reset by peer -- Some packages may not be found! Couldn't find index page for 'pytz' (maybe misspelled?) Scanning index of all packages (this may take a while) Reading http://pypi.python.org/simple/ Download error: [Errno 104] Connection reset by peer -- Some packages may not be found! No local packages or download links found for pytz error: Could not find suitable distribution for Requirement.parse('pytz') I am new to python, but it seems like easy_install cannot decide on a version of pytz. I have read http://stackoverflow.com/questions/383738/104-connection-reset-by-peer-socket-error-or-when-does-closing-a-socket-resul http://homepage.mac.com/s_lott/iblog/architecture/C551260341/E20081031204203/index.html and it seems like the problem described in those articles has more to do with development than my problem, but I could be wrong. Has anyone encountered a problem like this? If there is any missing information that would help troubleshoot this, please let me know.

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HTML 4, HTML 5, XHTML, MIME types - the definite resource

- by deceze

The topics of HTML vs. XHTML and XHTML as text/html vs. XHTML as XHTML are quite complex. Unfortunately it's hard to get a complete picture, since information is spread mostly in bits and pieces around the web or is buried deep in W3C tech jargon. In addition there's some misinformation being circulated. I propose to make this the definite SO resource about the topic, describing the most important aspects of: HTML 4 HTML 5 XHTML 1.0/1.1 as text/html XHTML 1.0/1.1 as XHTML What are the practical implications of each? What are common pitfalls? What is the importance of proper MIME types for each? How do different browsers handle them? I'd like to see one answer per technology. I'm making this a community wiki, so rather than contributing redundant answers, please edit answers to complete the picture. Feel free to start with stubs. Also feel free to edit this question.

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