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• Handling hundreds of actions in Struts2

  - by Roberto

  Hi all, I've inherited a struts 1 web application where, in order to reduce the number of Action classes (I guess this is the reason), lots of actions are mapped inside a single Action class, like: public XXXAction() throws Exception{ actions = new Hashtable(); actions.put("/XXX/main/load", new Integer(0)); actions.put("/XXX/main/save", new Integer(1)); ...... } public ActionForward executeAction(ActionMapping mapping, ActionForm form, HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException { try { switch (((Integer) actions.get(action)).intValue()) { case 0: loadXXXMain(); break; case 1: ....... and so on (in some Action classes I have almost one hundred of these small actions). Now I'm looking at migrate to struts2 and I would like to have a cleaner and better solution to handle this, maybe without having a single Action class for each of these small classes. What do you suggest? I don't like this solution, but I don't like having hundreds of Action classes.... Thanks! Roberto

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• PHP and writing clean code

  - by Pirkka

  Hello Im trying to find best practices to write PHP. I just wonder is this a bad habit. For example, processing variables. $var = 1 $var = doSomething($var); $var = doSomething2($var); $var = doSomething3($var); It looks a bit awful. Here is a example of a real code that I just did: $this->rSum = explode(",", $this->options["rSum"]); $this->rSum = array_combine(array_values($this->rSum), array_fill(0, count($this->rSum), 0)); If someone could pass me some good tutorials of writing cleaner code generally it would be nice! Its me again asking stupid questions. :)

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• XmlDocument from LINQ to XML query

  - by Ben

  I am loading an XML document into an XDocument object, doing a query and then returning the data through a web service as an XmlDocument object. The code below works fine, but it just seems a bit smelly. Is there a cleaner way to take the results of the query and convert back to an XDocument or XmlDocument? XDocument xd = XDocument.Load(Server.MapPath(accountsXml)); var accounts = from x in xd.Descendants("AccountsData") where userAccounts.Contains(x.Element("ACCOUNT_REFERENCE").Value) select x; XDocument xd2 = new XDocument( new XDeclaration("1.0", "UTF-8", "yes"), new XElement("Accounts") ); foreach (var account in accounts) xd2.Element("Accounts").Add(account); return xd2.ToXmlDocument();

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• Ant target for compile-time code instrumentation with Spring aspects

  - by alecswan

  I have developed a web application using Netbeans 6.7 and Ant. The webapp works, but I would like to refactor the code to use @Configurable Spring annotation for cleaner dependency injection. I was able to get load-time weaving (LTW) of Spring aspects to work intermittently (see http://forum.springsource.org/showthread.php?t=86904). At this point I would like to use compile-time weaving with my tool set. Could anybody provide an Ant target that I can use to weave Spring aspects at compile time? An extra credit will be given to anybody who explains how to configure Netbeans to execute the new Ant target right after code compilation. Thanks.

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• Splitting a string according to a delimiter when elements in the string can contain the delimiter

  - by Vivin Paliath

  I have a string that looks like this: "#Text() #SomeMoreText() #TextThatContainsDelimiter(#blah) #SomethingElse()" I'd like to get back [#Text(), #SomeMoreText(), #TextThatContainsDelimiter(#blah), #SomethingElse()] One way I thought about doing this was to require that the # to be escaped into \#, which makes the input string: "#Text() #SomeMoreText() #TextThatContainsDelimiter(\#blah) #SomethingElse()" I can then split it using /[^\\]#/ which gives me: [#Text(), SomeMoreText, TextThatContainsDelimiter(\#blah), SomethingElse()] The first element will contain # but I can strip it out. However, is there a cleaner way to do this without having to escape the #, and which ensures that the first element will not contain a #? Basically I'd like it to split by # only if the # is not enclosed by parentheses. My hunch is that since the # is context-sensitive and and regular expressions are only suited for context-free strings, this may not be the right tool. If so, would I have to write a grammar for this and roll my own parser/lexer?

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• Perl When is using AUTOLOAD OK?

  - by Robert S. Barnes

  In "Perl Best Practices" the very first line in the section on AUTOLOAD is: Don't use AUTOLOAD However all the cases he describes are dealing with OO or Modules. I have a stand alone script in which some command line switches control which versions of particular functions get defined. Now I know I could just take the conditionals and the evals and stick them naked at the top of my file before everything else, but I find it convenient and cleaner to put them in AUTOLOAD at the end of the file. Is this bad practice / style? If you think so why, and is there a another way to do it?

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• How to hide the vertical scroll bar in a .NET ListView Control in Details mode

  - by Adam Haile

  I've got a ListView control in Details mode with a single column. It's on a form that is meant to only be used with the keyboard, mostly with the up/down arrows for scrolling and enter to select. So I don't really need to have the scroll bars and would just like them to not show for a cleaner look. However, when I set the ListView.Scrollable property to false, I can still move the selected item up and down, but as soon as it moves to an item not currently in view, the list won't move to show that item. I've tried using EnsureVisible to programmatically scroll the list, but it does nothing when in this mode. Is there any way to manually move the list up and down to scroll, but without having the scrollbar present?

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• What is the underlying reason for not being able to put arrays of pointers in unsafe structs in C#?

  - by cons

  If one could put an array of pointers to child structs inside unsafe structs in C# like one could in C, constructing complex data structures without the overhead of having one object per node would be a lot easier and less of a time sink, as well as syntactically cleaner and much more readable. Is there a deep architectural reason why fixed arrays inside unsafe structs are only allowed to be composed of "value types" and not pointers? I assume only having explicitly named pointers inside structs must be a deliberate decision to weaken the language, but I can't find any documentation about why this is so, or the reasoning for not allowing pointer arrays inside structs, since I would assume the garbage collector shouldn't care what is going on in structs marked as unsafe. Digital Mars' D handles structs and pointers elegantly in comparison, and I'm missing not being able to rapidly develop succinct data structures; by making references abstract in C# a lot of power seems to have been removed from the language, even though pointers are still there at least in a marketing sense. Maybe I'm wrong to expect languages to become more powerful at representing complex data structures efficiently over time.

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• AS3 Event Bubbling outside of the Scenegraph/DisplayList

  - by Brian Heylin

  Hi just wondering if it is possible to take advantage of event bubbling in non display list classes in AS3. For example in the model of an application where there is a City class that contains many Cars. What methods are there to attach an event listener to a City object and receive events that bubble up from the child Cars. To clarify The City and Car objects are not part of the display list, they are not DisplayObjects. So can bubbling be implemented outside of the display list somehow? As far as I know, this is not possible without manually attaching event listeners to each Car object and re dispatching the event from the City object. Anyone else have a cleaner solution?

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• Initialize content of a jQuery remote tab on initial page load

  - by Carl

  I'm using the jQuery tabs library to create a set of remote (i.e., ajax loaded) tabs. However, to avoid the initial page load being empty until the ajax request finishes, I'd like to include the content for the initial tab with the initial page download. I've got this generally working by providing a div in the initial page load that matches the title of the tab, but even though this content appears immediately, as soon as I initialize the tabs it does the ajax request IN ADDITION which is both wasteful and causes a flicker. My basic question is how can I get jQuery tabs to NOT do an ajax request for the initially selected tab, and get this content as part of the initial page load, while still loading the other tabs dynamically. The complication is that I can't hard code the ids/hrefs for which tab is the "initial" one since the initial tab will change based on available content. I'm sure there is some kind of hacky way to do this with javascript rewriting the URLs of tabs dynamically before I initialize the tabs but I'm looking for a cleaner solution. Any ideas?

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• AutoMapper How to map nested object from an ObjectId

  - by RayMartinsHair

  I am trying to map the ReferralContract.AssessmentId property to Referral.Assessment.Id The below code works but I am sure that there is a cleaner way to do.... Please tell me this is so ;-) // Destination classes public class Referral { public Referral() { Assessment = new Assessment(); } public int Id { get; set; } public Assessment Assessment { get; set; } } public class Assessment { public int Id { get; set; } } // Source Class public class ReferralContract { public int Id { get; set; } public int AssessmentId { get; set; } } The Automapper mapping I am using is Mapper.CreateMap<ReferralContract, Referral>() .ForMember(x => x.Assessment, opt => opt.MapFrom(scr => new Assessment { Id = scr.AssessmentId }));

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• SVN: is it possible to delete a branch that was copied removed etc for good?

  - by dimus

  I have to remove a branch from svn history for good. Normally I would use svnadmin dump /path/to/repo |svndumpfilter --drop-empty-revs --renumber-revs exclude /branches/bad_branch However this branch was not just created, but also moved and then removed and dump script fails to process downstream information with messages like: Invalid copy source path '/branches/bad_branch' So I imagine 2 ways to cope with the problem keep only last few revisions of the history and put current repository as an archive on the web make a dump up to the revision where the 'bad_branch' was created and apply the rest of the changes as a patch, therefore losing history of a few recent commits. Is there a better, cleaner way to deal with this?

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• Insert record in Linq to Sql

  - by Anders Svensson

  Is this the easiest way to insert a record with Linq to Sql when there's a many-to-many relationship, or is there a better/cleaner way? I wasn't sure why things weren't working at first, but when I added a second SubmitChanges() it worked. Why was this necessary? Would be grateful if someone could clarify this a bit! private void InsertNew() { UserPageDBDataContext context = new UserPageDBDataContext(); User user = new User(); ManyToMany.Model.Page page = new ManyToMany.Model.Page(); user.Name = "Madde Andersson"; page.Url = "anderscom/references"; context.Users.InsertOnSubmit(user); context.Pages.InsertOnSubmit(page); context.SubmitChanges(); UserPage userPage = new UserPage(); userPage.UserID = user.UserID; userPage.PageID = page.PageID; user.UserPages.Add(userPage); context.SubmitChanges(); }

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• Android - Convert Color Resource to Color in Domain Object

  - by Steve

  I have a domain object, where I created a method to return a text color based on the internal state of the domain object. I have defined the colors in a color.xml file as resources. The problem I have now, is that I would like to return a Color object instead of a resource ID from the domain object method. This way I can set the text color of a TextView by just calling textView.setTextColor(domainObj.getTextColor()) since it expects a Color object and not a resource ID. Currently, in an Activity, I can call getResources().getColor(domainObj.getTextColorResource()) to convert a resource ID to a color, but I would like this done in the domain object and I am not sure how I would do this when I do not have access to the getResources method. Are there any cleaner options than passing in a Resource object into the method, or domain object? Thanks

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• Scala: working around the "illegal cyclic reference"

  - by Paul Milovanov

  Hi all, I'm trying to implement a HashMap-based tree that'd support O(1) subtree lookup for a given root key. To that goal, I'm trying to do the following: scala> type Q = HashMap[Char, Q] <console>:6: error: illegal cyclic reference involving type Q type Q = HashMap[Char, Q] ^ So the question is, is there a way for me to do something of the sort without resorting to the ugly HashMap[Char, Any] with subsequent casting of values to HashMap[Char, Any]? Now, I also see that I can use something like the following to avoid the cyclic-reference error, and it might even be cleaner -- but it'd be nice to find out how to correctly do it the first way, just for the educational value. import collections.mutable.HashMap class LTree { val children = new HashMap[Char, LTree] } Thanks a bunch.

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• comparator with null values.

  - by pvgoddijn

  Hi, We have some code wich sorts a list of addresses based on the distance between their coordinates. this is done through collections.sort with a custom comparator. However from time to time an adress without coordinates is in the list causing a NullPointerException. My initial idea to fix this was to have the comparator return 0 as dististance for addresses where at least one of the coordinates is null. I fear this might lead to corruption of the order the 'valid' elements in the list. so is returning a '0' values for null data in a comparator ok, or is there a cleaner way to resolve this.

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• CSV string handling

  - by Christian Hagelid

  Typical way of creating a CSV string (pseudocode): create a CSV container object (like a StringBuilder in C#) Loop through the strings you want to add appending a comma after each one After the loop, remove that last superfluous comma. Code sample: public string ReturnAsCSV(ContactList contactList) { StringBuilder sb = new StringBuilder(); foreach (Contact c in contactList) { sb.Append(c.Name + ","); } sb.Remove(sb.Length - 1, 1); //sb.Replace(",", "", sb.Length - 1, 1) return sb.ToString(); } I feel that there should be an easier / cleaner / more efficient way of removing that last comma. Any ideas? Update I like the idea of adding the comma by checking if the container is empty, but doesn't that mean more processing as it needs to check the length of the string on each occurrence?

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• Simple PHP Regex question

  - by Dave Kiss

  Hi all, I'd like to validate a field in a form to make sure it contains the proper formatting for a URL linking to a Vimeo video. Below is what I have in Javascript, but I need to convert this over to PHP (not my forte) Basically, I need to check the field and if it is incorrectly formatted, I need to store an error message as a variable.. if it is correct, i store the variable empty. // Parse the URL var PreviewID = jQuery("#customfields-tf-1-tf").val().match(/http:\/\/(www.vimeo|vimeo)\.com(\/|\/clip:)(\d+)(.*?)/); if ( !PreviewID ) { jQuery("#cleaner").html('<div id="vvqvideopreview"><?php echo $this->js_escape( __("Unable to parse preview URL. Please make sure it's the <strong>full</strong> URL and a valid one at that.", 'vipers-video-quicktags') ); ?></div>'); return; } The traditional vimeo url looks like this: http://www.vimeo.com/10793773 Thanks!

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• javascript/jquery input fields cleanup

  - by user271619

  I've created a few input fields, that I am cleaning up as the user types. So, I'm using a keystroke detection event, like .keyup() It's all working very well, but I do notice one thing that's rather annoying for the users. While the script is cleaning the data as they type, their cursor is being sent to the end of the input field. So, if you want to edit the middle of the value, you're cursor immediately goes to the end of the box. Does anyone know of a way to maintain the cursor's current position inside the input field? I'm not holding my breath, but I thought I'd ask. Here's the cleanup code I'm using: $(".pricing").keyup(function(){ // clean up anything non-numeric **var itemprice = $("#itemprice").val().replace(/[^0-9\.]+/g, '');** // return the cleaner value back to the input field **$("#itemprice").val(itemprice);** });

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• Vista/7: How to get glass color?

  - by Ian Boyd

  How do you use DwmGetColorizationColor? The documentation says it returns two values: a 32-bit 0xAARRGGBB containing the color used for glass composition a boolean parameter that is true "if the color is an opaque blend" (whatever that means) Here's a color that i like, a nice puke green: You can notice the color is greeny, and the translucent title bar (against a white background) shows the snot color very clearly: i try to get the color from Windows: DwmGetColorizationColor(dwCcolorization, bIsOpaqueBlend); And i get dwColorization: 0x0D0A0F04 bIsOpaqueBlend: false According to the documentation this value is of the format AARRGGBB, and so contains: AA: 0x0D (13) RR: 0x0A (10) GG: 0x0F (15) BB: 0x04 (4) This supposedly means that the color is (10, 15, 4), with an opacity of ~5.1%. But if you actually look at this RGB value, it's nowhere near my desired snot green. Here is (10, 15, 4) with zero opacity (the original color), and (10,15,4) with 5% opacity against a white/checkerboard background: So the question is: How to get glass color in Windows Vista/7? i tried using DwmGetColorizationColor, but that doesn't work very well. A person with same problem, but a nicer shiny picture to attract you squirrels: So, it boils down to – DwmGetColorizationColor is completely unusable for applications attempting to apply the current color onto an opaque surface. i love this guy's screenshots much better than mine. Using his screenshots as a template, i made up a few more sparklies: For the last two screenshots, the alpha blended chip is a true partially transparent PNG, blending to your browser's background. Cool! (i'm such a geek) Edit 2: Had to arrange them in rainbow color. (i'm such a geek) Edit 3: Well now i of course have to add Yellow. Undocumented/Unsupported/Fragile Workarounds There is an undocumented export from DwmApi.dll at entry point 137, which we'll call DwmGetColorizationParameters: HRESULT GetColorizationParameters_Undocumented(out DWMCOLORIZATIONPARAMS params); struct DWMCOLORIZATIONPARAMS { public UInt32 ColorizationColor; public UInt32 ColorizationAfterglow; public UInt32 ColorizationColorBalance; public UInt32 ColorizationAfterglowBalance; public UInt32 ColorizationBlurBalance; public UInt32 ColorizationGlassReflectionIntensity; public UInt32 ColorizationOpaqueBlend; } We're interested in the first parameter: ColorizationColor. We can also read the value out of the registry: HKEY_CURRENT_USER\Software\Microsoft\Windows\DWM ColorizationColor: REG_DWORD = 0x6614A600 So you pick your poison of creating appcompat issues. You can rely on an undocumented API (which is bad, bad, bad, and can go away at any time) use an undocumented registry key (which is also bad, and can go away at any time) See also Is there a list of valid parameter combinations for GetThemeColor / Visual Styles API How does Windows change Aero Glass color? DWM - Colorization Color Handling Using DWMGetColorizationColor Retrieving Aero Glass base color for opaque surface rendering i've been wanting to ask this question for over a year now. i always knew that it's impossible to answer, and that the only way to get anyone to actually pay attention is to have colorful screenshots; developers are attracted to shiny things. But on the downside it means i had to put all kinds of work into making the lures.

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• Using git branches for variations of a project

  - by Trevor Hartman

  I'm using git's branching feature to manage 5 variations of a small website. There are 5 versions that will all be live in different subdirectories on production. My approach to checking out the various branches to their respective folders was to: mkdir foo && cd foo git init git remote add origin git@...:project.git git fetch origin foo:foo Where "foo" is a given branch name. This was fine, except for that it pulled my entire repo (designs, as3 source, etc...) into those branch folders instead of just the public www folder, which is the only thing I really want on production. Is there a cleaner way to handle this? Git can't clone subdirectories right?

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• How to properly close a socket after an exception is caught?

  - by marco

  Hello, after my last project I had the problem that the client was expecting an object from the server, but while processing the clients input an exception that forces the server to close the socket for security reasons is caught. This causes the client to terminate in a very unpleasant way, the way I decided to deal with this was sending the client a Input status message after each recieved input so that he knows if his input was processed properly or if he needs to throw an exception. So my question: Is there a better/cleaner way to close the socket after an exception is caught?? thanks,

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• AppDelegate viewController memory leak?

  - by fuzzygoat

  I am just curious with regards to the correct way to create a view controller programatically. When I compile this code with the static analyser I get a leak (as you would expect) from the alloc. Should I just leave it as it needs to stay until the app exits anyways, or is there a cleaner way? - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { NSLog(@"UIApplication application:"); RectViewController *myController = [[RectViewController alloc] init]; [window addSubview:[myController view]]; [window makeKeyAndVisible]; return YES; } cheers Gary

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• How can I rewrite this code to improve its clarity?

  - by eric

  Could you write this 'cleaner' ? Just a simple question from a beginner:) if(isset($_GET['tid']) && trim($_GET['tid'])!==""){ $act = 'tid'; $tid = trim($_GET['tid']); }elseif(isset($_GET['fid']) && trim($_GET['fid'])!==""){ $act = 'fid'; $fid = trim($_GET['fid']); }elseif(isset($_GET['mid']) && trim($_GET['mid'])!==""){ $act = 'mid'; }elseif(isset($_GET['act']) && trim($_GET['act'])!==""){ $act = trim($_GET['act']); }else{ $act = ""; }

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• How do I modify the HttpResponse object in django ?

  - by Rohit

  I need the html returned using render_to_response to be escaped. I am unable to find any suitable documentation. Can someone point in some direction ? the code is : return render_to_response(template_name, {return render_to_response(template_name, { 'form': form, redirect_field_name: redirect_to, 'site': current_site, 'site_name': current_site.name, }, context_instance=RequestContext(request)) Here I need the response html text to be escaped. I way I know is reading template file in string and escaping it with re.escape() and then rendering it. whats a cleaner and simpler way to do that ??

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