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  • PHP OOP Concepts (Value Objects / Data Access Objects)

    - by Iuhiz
    Hi, I've just started to learn PHP OOP, previously I have been doing PHP in a procedural manner. I was reading this article and I've got a couple of quick questions, How is the constructor for value objects commonly defined? As one that takes in all "data members" as parameters or stick to the default constructor and use mutator / accessor methods to set / get data members? Is this actually the recommended way to start doing PHP OOP? Cos honestly, the concepts explained in the article was a tad confusing for me. Cheers

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  • WPF: How to specify units in Dialog Units?

    - by Ian Boyd
    i'm trying to figure out how to layout a simple dialog in WPF using the proper dialog units (DLUs). i spent about two hours dimensioning this sample dialog box from Windows Vista with the various dlu measurements. Can someone please give the corresponding XAML markup that generates this dialog box? (Image Link) Now admittedly i know almost nothing about WPF XAML. Every time i start, i get stymied because i cannot figure out how to place any control. It seems that everything in WPF must be contained on a panel of some kind. There's StackPanels, FlowPanels, DockPanel, Grid, etc. If you don't have one of these then it won't compile. The only XAML i've been able to come up with (uing XAMLPad) so far: <DockPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Image Width="23" /> <Label>Are you sure you want to move this file to the Recycle Bin?</Label> <Image Width="60" /> <Label>117__6.jpg</Label> <Label>Type: ACDSee JPG Image</Label> <Label>Rating: Unrated</Label> <Label>Dimensions: 1072 × 712</Label> <Button Content="Yes" Width="50" Height="14"/> <Button Content="Cancel" Width="50" Height="14"/> </DockPanel> Which renders as a gaudy monstrosity. None of the controls are placed or sized right. i cannot figure out how to position controls in a window, nor size them properly. Can someone turn that screenshot into XAML? Note: You're not allowed to measure the screenshot. All the Dialog Unit (dlu) widths and heights are specified. Note: 1 horizontal DLU != 1 vertical DLU. Horizontal and vertical DLUs are different sizes. Links Microsoft User Experience Guidelines: Recommended sizing and spacing Microsoft User Experience Guidelines: Layout Metrics Bump: 2011/05/14 (15 months later)

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  • Taking "do the simplest thing that could possible work" too far in TDD: testing for a file-name kno

    - by Support - multilanguage SO
    For TDD you have to Create a test that fail Do the simplest thing that could possible work to pass the test Add more variants of the test and repeat Refactor when a pattern emerge With this approach you're supposing to cover all the cases ( that comes to my mind at least) but I'm wonder if am I being too strict here and if it is possible to "think ahead" some scenarios instead of simple discover them. For instance, I'm processing a file and if it doesn't conform to a certain format I am to throw an InvalidFormatException So my first test was: @Test void testFormat(){ // empty doesn't do anything nor throw anything processor.validate("empty.txt"); try { processor.validate("invalid.txt"); assert false: "Should have thrown InvalidFormatException"; } catch( InvalidFormatException ife ) { assert "Invalid format".equals( ife.getMessage() ); } } I run it and it fails because it doesn't throw an exception. So the next thing that comes to my mind is: "Do the simplest thing that could possible work", so I : public void validate( String fileName ) throws InvalidFormatException { if(fileName.equals("invalid.txt") { throw new InvalidFormatException("Invalid format"); } } Doh!! ( although the real code is a bit more complicated, I found my self doing something like this several times ) I know that I have to eventually add another file name and other test that would make this approach impractical and that would force me to refactor to something that makes sense ( which if I understood correctly is the point of TDD, to discover the patterns the usage unveils ) but: Q: am I taking too literal the "Do the simplest thing..." stuff?

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  • Flowcharting tool/add-in for Visual Studio

    - by Rajah
    A 2 part question: Are flow-charts, as tool to analyze source-code, no longer considered useful? The reason I ask this question is that if you Google for source-code to flowchart tools for Visual Studio, there are no relevant results. Also, Microsoft does not seem to have a tool for this purpose. Are people just not using flowcharts that much any more? (I find them to be a great way to document complex logic in my code). Are there any VS tools that can take .Net (C#, VB.Net) code and convert it to a flowchart? (The only tool that I found is Aviosto's Visustin, which does not provide VS integration). Any other tools that you can recommend for this purpose?

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  • linq2sql - where to enlist transaction (repository or bll)?

    - by Caroline Showden
    My app uses a business layer which calls a repository which uses linq to sql. I have an Item class that has an enum type property and an ItemDetail property. I need to implement a delete method that: (1) always delete the Item (2) if the item.type is XYZ and the ItemDetail is not null, delete the ItemDetail as well. My question is where should this logic be housed? If I have it in my business logic which I would prefer, this involves two separate repository calls, each of which uses a separate datacontext. I would have to wrap both calls is a System.Transaction which (in sql 2005) get promoted to a distributed transaction which is not ideal. I can move it all to a single repository call and the transaction will be handled implicitly by the datacontext but feel that this is really business logic so does not belong in the repository. Thoughts? Carrie

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  • Working with jTempalte and objects

    - by Dejan.S
    EDITSolved the one object question I had at first Hi I'm using jTemplate for the first time. I been reading and it's not that hard to use it BUT I just found a examaple on one object use. <script type="text/html" id="TemplateREsultTable"> <div style="background-color: #ccc">{$T.Email}</div> <div style="background-color: #ddd">{$T.Password}</div> </script> One question about jTempaltes I got is what is better to do them in htm file or script? Another thought I got, is jTemplate the way to go?

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  • "Collection was modified..." Issue

    - by Tyler Murry
    Hey guys, I've got a function that checks a list of objects to see if they've been clicked and fires the OnClick events accordingly. I believe the function is working correctly, however I'm having an issue: When I hook onto one of the OnClick events and remove and insert the element into a different position in the list (typical functionality for this program), I get the "Collection was modified..." error. I believe I understand what is going on: The function cycles through each object firing OnClick events where necessary An event is fired and the object changes places in the list per the hooked function An exception is thrown for modifying the collection while iterating through it My question is, how to do I allow the function to iterate through all the objects, fire the necessary events at the proper time and still give the user the option of manipulating the object's position in the list? Thanks, Tyler

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  • Android Development Tips, Tricks & Gotchas

    - by Mat Nadrofsky
    I'm starting down the road of Android Development. At this point I'm looking for some insight from other developers who have been doing 'droid development and have some experience to share with someone who is just starting out. This can be anything from API to AVM to IDE. Any unexpected things come up while building your apps? Any tips for project layout or organization that help facilitate the deployment process to the Android AppStore? Any patterns which specifically helped in a particular situation? Even links to great blogs or sample apps and resources beyond those which you can grab from Google Code would be appreciated.

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  • Dynamic find methods Vs conditional statements

    - by piemesons
    Student.find(:all, :conditions => [‘name = ? and status = ?’ ‘mohit’, 1]) Vs Student.find_all_by_name_and_status(‘mohit’, 1) Both the queries will result the same set of row but first one is preferable cause in the second way there will be exception generated method_missing and then rails will try to relate it as dynamic method. if fine then result set to returned. Can any body explain me this in a good manner. What exactly is happening behind the screen. Please correct me if i am wrong.

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  • like exec command in silverlight(save and load properties of Elements dynamically)

    - by Meysam Javadi
    i have some element in my container and want to save all properties of this elements. i list this element by VisualTreeHelper and save its attributes in DB, question is that how to retrieve this properties and affect them? i think that The Silverlight have some statement that behave like Exec in Sql-Server. i save properties in one line that delimited by semicolon.(if you have any suggestion ,appreciate) Edit: suppose this scenario: End-User choose a tool from Mytoolbox(a container like Grid) ,a dialog shown its properties for creation and finally draw Grid . in resumption he/she choose one element(like Button) and drop it on one of the grid's cell. now i want to save workspace that he/she created! My RootLayout have one container control so any of element are child of this.HERETOFORE i want create one string that contain all general properties(not all of them) and save to DB, and when i load this control, i create an element by the type that i saved and affect it by the properties that i saved; with something like EXEC command. is this possible ? have you new approach for this scenario(Guide me with example please).

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  • EJB3 Business Delegates

    - by mykola
    Is there any reason for making delegate when using EJB3? Because the only real benefit i see from delegate is that it allows to hide lookup and access details of EJB architecture. Well it also provides some decoupling but it's mostly unused, imho. With EJB3 we have injection so now i can just create a variable with @EJB annotation and use it as is. Do i still need delegates? Is this injection resource consuming? I mean if i use it in JSF's request managed beans may be it's still better to use delegates just to lessen these injection calls? Thank you!

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  • Suggestions on bug lifecycle and release management

    - by Andrew Edgecombe
    Our group is currently analysing our procedures for managing formal software releases and integrating with a bug lifecycle. What bug lifecycle model do you use? And why? For example assume a that formal releases are generated for QA once per week. At what point do you mark bugs as resolved? When the developer has committed their changes? When the changes have been reviewed and merged into the release branch? When the formal release candidate has been created? And what process, or features of your bug tracking sofware, do you use for tracking this? Are there any tips/suggestions/recommendations that you can share?

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  • How to show validation messages in MVC?

    - by Ian Boyd
    When a user tries to click:        Save and they have entered in some invalid data, i want to notify them. This can be with methods such as: directing their attention to the thing that needs their attention with a balloon hint automatically dropping down a combo-box triggering an animation showing a modal dialog box etc What is the mechanism where a controller tells the view to show a validation message for some controls, given that different views have different notification methods? p.s. the controller doesn't know the order that controls are physically arranged in the view (e.g. LTR locale wants to notify the user in a top-down-left-to-right visual order, while RTL locale wants to notify the user in a bottom-up-right-to-left order)

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  • Best way to find updates in xml feed

    - by misterjinx
    Hello all, I have an xml feed that I have to check periodically for updates. The xml consists of many elements and I'm looking to figure it out which is the best (and probably faster) way to find out which elements suffered updates from last time I've checked. What I think of is to check first the lastBuildDate for modifications and if it differs from the previous one to start parse the xml again. This would involve keeping each element with all of its attributes in my database. But each element can have different number of attributes as well as other nested elements. So if it would be to store each element in my database what would be the best way to keep them ? That's why I'm asking for your help :) Thank you.

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  • To Ajax or Not to Ajax a listing page

    - by kaivalya
    Here i am talking about product listing pages where there are multiple filters that filter the list of products appearing on the page like product types, categories price range etc. I have done such pages using both ajax and no ajax way in the past. What I like about using ajax in such page is that, when filters are selected I only update the section that contains the product list. There is no need to refresh the whole page which could end up re-loading the images on top bar, banners etc and slow down the user performance. Ajax way in my opinion becomes more compact and responsive from user experience. Down side for ajax route for me is; since filter states are not maintained in the URL I end up maintaining them on the server. This becomes complicated if I want to handle multi window scenarios and it is also costly to maintain such state on server memory for each session. Not using ajax and simply keeping all filter values on url and refreshing the page is quite simple but the luxury of refreshing only the pane that really needs to be refreshed is lost. Lately I am seeing a lot of large scale e-commerce sites that are using non-ajax approach on their listing pages and this is making me question one more time if it might be more efficient to build non-ajax listing make due to the long term maintenance ease and sacrifice a little bit from user experience. I am about to start implementing a new listing page for a product which I have the flexibility to go either way and I would appreciate your inputs.

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  • Are there some general Network programming best practices?

    - by uriDium
    I am implementing some networking stuff in our project. It has been decided that the communication is very important and we want to do it synchronously. So the client sends something the server acknowledges. Are there some general best practices for the interaction between the client and the server. For instance if there isn't an answer from the server should the client automatically retry? Should there be a timeout period before it retries? What happens if the acknowledgement fails? At what point do we break the connection and reconnect? Is there some material? I have done searches but nothing is really coming up. I am looking for best practices in general. I am implementing this in c# (probably with sockets) so if there is anything .Net specific then please let me know too.

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  • Concrete Types or Interfaces for return types?

    - by SDReyes
    Today I came to a fundamental paradox of the object programming style, concrete types or interfaces. Whats the better election for a method's return type: a concrete type or an interface? In most cases, I tend to use concrete types as the return type for methods. because I believe that an concrete type is more flexible for further use and exposes more functionality. The dark side of this: Coupling. The angelic one: A concrete type contains per-se the interface you would going to return initially, and extra functionality. What's your thumb's rule? Is there any programming principle for this? BONUS: This is an example of what I mean http://stackoverflow.com/questions/491375/readonlycollection-or-ienumerable-for-exposing-member-collections

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  • Biggest GWT Pitfalls?

    - by agartzke
    I'm at the beginning/middle of a project that we chose to implement using GWT. Has anyone encountered any major pitfalls in using GWT (and GWT-EXT) that were unable to be overcome? How about from a performance perspective? A couple things that we've seen/heard already include: Google not being able to index content CSS and styling in general seems to be a bit flaky Looking for any additional feedback on these items as well. Thanks!

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  • I've Heard Global Variables Are Bad, What Alternative Solution Should I Use?

    - by Jay
    I've read all over the place that global variables are bad and alternatives should be used. In Javascript specifically, what solution should I choose. I'm thinking of a function, that when fed two arguments (function globalVariables(Variable,Value)) looks if Variable exists in a local array and if it does set it's value to Value, else, Variable and Value are appended. If the function is called without arguments (function globalVariables()) it returns the array. Perhaps if the function is fired with just one argument (function globalVariables(Variable)) it returns the value of Variable in the array. What do you think? I'd like to hear your alternative solutions and arguments for using global variables.

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  • StarTeam trunk.

    - by Nix
    I have the unfortunate opportunity of source control via Borland's StarTeam. It unfortunately does very few things well, and one supreme weakness is its view management. I love SVN and come from an SVN mindset. Our issue is post production release we are spending countless hours merging changes into a "production support" environment. Please do not harass me this was not my doing, I inherited it and am trying to present a better way of managing the repository. It is not an option to switch to a different SCM tool. Current setup Product.1.0 (TRUNK, current production code, and at this level are pending bug fixes) Product.2.0(true trunk anything checked in gets tested, and then released next production cycle, a lot of changes occur in this view) My proposal is going to be to swap them, have all development be done on the trunk (Production), tag on releases, and as needed create child views to represent production support bug fixes. Production Production.2.0.SP.1 I can not find any documentation to support the above proposal so I am trying to get feedback on whether or not the change is a good idea and if there is anything you would recommend doing differently.

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  • How to run concurrency unit test?

    - by janetsmith
    Hi, How to use junit to run concurrency test? Let's say I have a class public class MessageBoard { public synchronized void postMessage(String message) { .... } public void updateMessage(Long id, String message) { .... } } I wan to test multiple access to this postMessage concurrently. Any advice on this? I wish to run this kind of concurrency test against all my setter functions (or any methodn that involves create/update/delete operation). Thanks

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  • Create XML File Using XML Schema

    - by metdos
    Is there any easy way to create at least a template XML file using XML Schema? My main interest is bounded by C++, but discussions of other programming languages are also welcome.By the way I also use QT framework.

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