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  • Is it okay to have many Abstract classes in your application?

    - by JoseK
    We initially wanted to implement a Strategy pattern with varying implementations of the methods in a commmon interface. These will get picked up at runtime based on user inputs. As it's turned out, we're having Abstract classes implementing 3 - 5 common methods and only one method left for a varying implementation i.e. the Strategy. Update: By many abstract classes I mean there are 6 different high level functionalities i.e. 6 packages , and each has it's Interface + AbstractImpl + (series of Actual Impl). Is this a bad design in any way? Any negative views in terms of later extensibility - I'm preparing for a code/design review with seniors.

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  • Writing a basic shader for large input files

    - by Zoltan Varadi
    I started writing a shader for my iOS app and instead of starting from scratch i used this tutorial here: http://www.raywenderlich.com/3664/opengl-es-2-0-for-iphone-tutorial I wrote an import function, first to import wavefront .obj models. My problem is that with I can't handle larger inputs (with a simple cube it was working). I realized that the indices array is an array of GLubyte values, which is unsigned char, so as a result i cant have more than 256 indexes. I modified it to GLuint, but then only get a blank screen. What else needs to me modified? p.s.: the source can be downloaded from here: http://d1xzuxjlafny7l.cloudfront.net/downloads/HelloOpenGL.zip

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  • How do I change the cursor and its size?

    - by Thomas Le Feuvre
    I have recently created an Ubuntu 12.04 partition on my Windows 7 laptop. When installing it, I switched to "high contrast" mode, which has rather large cursors (by large I mean about twice as large and thick as they should normally are). Now I have successfully installed the partition, the large cursors have stuck around even after exiting this high contrast mode, but only when I am hovering over stuff e.g. hovering over text inputs, links, and when resizing windows. All of these cursors are too large. They cursor is only normally sized when the computer should be displaying the normal mouse pointer. Does anyone know how I might go about fixing this?

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  • Stateless game design

    - by L. De Leo
    I'm facing a challenge understanding how to program a web version of a card game that is completely stateless. I create my object graph when the game begins and distribute cards to PlayerA and PlayerB so I lay them out on the screen. At this point I could assume that HTML and the querystring is what holds at least some of my state and just keep a snapshot copy of the game state on the server-side for the sole purpose of validating the inputs I receive from the web clients. Still it appears to me that the state of the game is by its nature mutable: cards are being dealt from the deck, etc... Am I just not getting it? Or should I just strive to minimize the side-effects of my functions to the objects that I take as my input? How would you design a stateless card game?

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  • Is there an effective way to test XSL transforms/BizTalk maps?

    - by nlawalker
    Creating repeatable tests for BizTalk maps is frustrating. I can't find a way to handle testing them like I'd do unit testing, because I can't find ways to break them into logical chunks. They tend to be one big monolithic unit, and any change has the potential to ripple through the map and break a lot of unit tests. Even if I could break it up, creating XML test inputs is painful and error prone. Is there any effective way of testing these? I'd settle for recommendations for testing XSL transforms in general, but I specifically mention BizTalk maps primarily for the reason that when using the mapper, there really isn't any way to break your XSLT into templates (which I'd imagine you could use to break up your logic into testable chunks, but I've honestly never gotten that far with XSLT).

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  • Unable to record from USB sound card line-in connector

    - by tete
    I've been googling and struggling with this for a while but haven't been able to make this work. I bought a USB sound card (Encore ENMAB 8-CM) to record from its line-in connector. I'm not sure which input to pick in Audicity, but I'me sure I've tested them all. These are all the available inputs I have in Audacity. But there's no sound being recorded at all. I've already checked the device is working, so I really don't know if I'm doing something wrong. Any help will be very appreciated. Cheers.

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  • Design pattern: static function call with input/output containers?

    - by Pavlo Dyban
    I work for a company in software research department. We use algorithms from our real software and wrap them so that we can use them for prototyping. Every time an algorithm interface changes, we need to adapt our wrappers respectively. Recently all algorithms have been refactored in such a manner that instead of accepting many different inputs and returning outputs via referenced parameters, they now accept one input data container and one output data container (the latter is passed by reference). Algorithm interface is limited to a static function call like that: class MyAlgorithm{ static bool calculate(MyAlgorithmInput input, MyAlgorithmOutput &output); } This is actually a very powerful design, though I have never seen it in a C++ programming environment before. Changes in the number of parameters and their data types are now encapsulated and they don't change the algorithm callback. In the latest algorithm which I have developed I used the same scheme. Now I want to know if this is a popular design pattern and what it is called.

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  • Is using build-in sorting considered cheating in practice tests?

    - by user10326
    I am using one of the practice online judges where a practice problem is asked and one submits the answer and gets back if it is accepted or not based on test inputs. My question is the following: In one of the practice tests, I needed to sort an array as part of the solution algorithm. If it matters the problem was: find 2 numbers in an array that add up to a specific target. As part of my algorithm I sorted the array, but to do that I used Java's quicksort and not implement sorting as part of the same method. To do that I had to do: java.util.Arrays.sort(array); Since I had to use the fully qualified name I am wondering if this is a kind of "cheating". (I mean perhaps an online judge does not expect this) Is it? In a formal interview (since these tests are practice for interview as I understand) would this be acceptable?

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  • processing gamestate with a window of commands across time?

    - by rook2pawn
    I have clients sending client updates at a 100ms intervals. i pool the command inputs and create a client command frame. the commands come into the server in these windows and i tag them across time as they come in. when i do a server tick i intend to process this list of commands i.e. [ {command:'duck',timestamp:350,player:'a'}, {command:'shoot',timestamp:395,player:'b'}, {command:'move', timestamp:410,player:'c'} {command:'cover',timestamp:420,player:'a'} ] how would i efficiently update the gamestate based on this list? the two solutions i see are 1) simulate time via direct equation to figure out how far everyone would move or change as if the real gameupdate was ticking on the worldtick..but then unforseen events that would normally trigger during real update would not get triggered such as powerups or collissions 2) prepare to run the worldupdate multiple times and figure out which commands get sent to which worldupdate. this seems better but a little more costly is there a canonical way to do this?

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  • How would you tackle a pattern-finding program?

    - by Neil
    Just to be clear, I don't think this should be question better suited for stackoverflow.com simply because there's not a single answer but a wide range of possible solutions, making this question far more subjective in nature. I was curious how you guys would tackle a pattern-finding program, which is to say I'd do the following operations: I enter in some input. Program predicts my next input based on all previous inputs. Rinse. Repeat. Since the amount of input I could provide is so varied, including empty strings, conventional means such as switches or regular expressions are out, since it would require you to have an inkling of information about what to expect. I was thinking about some form of genetic algorithm, yet even then I don't have a clue as to how to approach a problem of this caliber. I think some feedback mechanism would be necessary as well as to let the program know how close it was. Anyone had to do a similar type program before?

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  • Recognizing text fields according to their label value

    - by Pierpaolo Bagnasco
    I have an application who has text fields (not select, not checkbox or other types) where an user can enter some value, like this: ISBN and E-Mail are the label of each input. Now I have to automatically test these inputs according to their label. The question is: how to recognize that, for example, the first input requires an ISBN code? I programmed something like this: turn the label value to lowercase check if the label value contains isbn if so set the field value to a random ISBN code (i.e.: 1234567890), else set it to a random value (default) For the email field: turn the label value to lowercase check if the label value contains e-mail or email or mail if so set the field value to a random email (i.e.: [email protected]), else set it to a random value (default) And so on for each text field I encounter. Is that reliable? How can I improve the "recognizing part"? I know only the label value and the field value (what is already written in the field by default) for each text input.

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  • VB 2010 LOGIN 3-TIMES LOOP [migrated]

    - by stargaze07
    How to put a loop on my log in code it's like the program will end if the user inputs a wrong password/username for the third time? At this point I'm having a hard time putting the loop code. This is my LogIn Code in VB 2010 Private Sub btnLogIn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogIn.Click Me.Refresh() Dim login = Me.TblUserTableAdapter1.UsernamePasswordString(txtUser.Text, txtPass.Text) If login Is Nothing Then MessageBox.Show("Incorrect login details", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error) Else Dim ok As DialogResult ok = MessageBox.Show("Login Successful", "Dantiña's Catering Maintenance System", MessageBoxButtons.OK, MessageBoxIcon.Information) MMenu.Show() MMenu.lblName.Text = "Welcome " & Me.txtUser.Text & " !" If txtPass.Text <> "admin" Then MMenu.Button1.Enabled = False ProdMaintenance.GroupBox1.Visible = True MMenu.Button2.Enabled = True MMenu.Button3.Enabled = True MMenu.Button4.Enabled = True Else MMenu.Button1.Enabled = True ProdMaintenance.GroupBox1.Visible = True MMenu.Button2.Enabled = True MMenu.Button3.Enabled = True MMenu.Button4.Enabled = True End If Me.Refresh() Me.Hide() End If End Sub

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  • What framework for text rating site?

    - by problemofficer
    I want to start a "rate my"-style site. The rated objects are mostly texts. I want it to be rather simple. Features I need: object rating (thumb up, thumb down) object comments object tags related object presentation based on tags user authentication and management private message system sanity checks for text inputs (i.e. prevention of code injections) cache open source runs on GNU/Linux I would gladly take something that is tailored for my scenario but a generic framework would be fine too. I simply don't want to write stuff like user authentication that is been written a million times and risking security flaws. Programming language is irrelevant but python/php preferred.

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  • How to separate and maintain customer specific code

    - by WYSIWYG
    I am implementing customer specific code and currently following simple approach like if (cusomterId == 23) do it. I want to separate out all the customer related code in separate place. But I have following problems. In code is in 1. Stored procs 2. Plain old classes. 3. Controllers 4. Views I came up with two solutions. First is to create table CustomerFunctionlity with columns CustomerId, FunctionalityName, method/Proc, inputs/outputs With this table I can simply check if exists, execute given function. Another way is creating a factory which returns customer related object for an interface. I am writting small end to end customer specific functionalities. How can I write maintenable code. Thanks

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  • Exclude PHP from output from WYSIWYG in CMS

    - by bytewalls
    I'm writing a basic CMS for one of my sites and have run into an issue where some pages need to dynamically serve PHP and JS, where as others are plain HTMl. I want there to be a setting which will allow this for the pages that need it and will load ACE editor instead of a different wysiwyg editor. The challenge here is that on the pages which I do not explicitly tell it there will be code, I want to reject any inputs that code. I can set it up to insert a for all pages without JS, but how can I keep php code from running?

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  • Business Layer Design in J2EE Project

    - by user63157
    Currently the project on which I am working is being developed with Spring, Hibernate and struts. The business layer consists of simple java beans with no behavior in them only properties and getter and setter methods, the services are written on them which operates on them and call DAO layer methods and all. My questions is that is it object oriented way of designing or simply the procedure way in which the data and the functions on which they operate are not together. Please provide your thoughts and inputs on how the business logic is design and implemented in j2ee application, is the domain model contains business methods or are they simply dumb objects which have only data and services written on to them.

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  • Output the total number of String Characters [migrated]

    - by Programmerwannabe
    My Question is what method should I use if I wanted to get the total number of characters a user inputs? without using arrays, i tried using .length() but it did not return all characters say from the first and lastname, it only returned the first name. Here's an example of my code. (Please dont laugh im really new in programming :) ) System.out.print("Enter your first and last name: "); String yourName = keyboard.next(); System.out.println("Your name has a total of " + yourName.length() + " numbers"); what happened was if i enter say "Neo Matrix" it would only return 3. I appreciate any help. thank you!

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  • Sharepoint xsl ddwrt FormatDateTime issue

    - by mahumba
    I use the ddwrt:FormatDateTime function to format the output like yyyyMMdd. inputs like 01/01/2010 work fine but when the day gets over the number 12 the output is an emtpy string. ddwrt:FormatDate(string(@myDate), 1033, 'yyyyMMdd') At first I thought it could be a language specific problem but even none of those combinations work: 13/01/2010 01/13/2010 13.01.2010

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  • Dijkstra’s algorithm and functions

    - by baris_a
    Hi guys, the question is: suppose I have an input function like sin(2-cos(3*A/B)^2.5)+0.756*(C*D+3-B) specified with a BNF, I will parse input using recursive descent algorithm, and then how can I use or change Dijkstra’s algorithm to handle this given function? After parsing this input function, I need to execute it with variable inputs, where Dijkstra’s algorithm should do the work. Thanks in advance. EDIT: May be I should ask also: What is the best practice or data structure to represent given function?

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  • RegQueryValueEx function fails On Windows7

    - by jitesh
    Hi All, I have a dll made in cpp which tries to read/write some Registry Keys. This code runs perfectly fine in Windows XP (32 bit environment) but it fails in Windows 7(64 bit environment). The registry keys which this application accesses is the shared registry keys. These keys are not part of 32 bit registry cache(wow32 bit) or 64 bit registry cache. Please provide your valuable inputs on this. Thanks in advance. Jits

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  • SWFUpload "addPostParam" doesn't work

    - by bah
    Hi, I've been testing this upload script and it looks really good, but i just can't get it to post values, that i have extracted from inputs. Everything is looking good and it seems I'm writing everything correctly but it just stops SWF DEBUG: Event: uploadStart : File ID: SWFUpload_0_0, there's my piece of code which causes these troubles .bind('uploadStart', function(event, file){ $(this).addPostParam( "title", "asd"); }) I'm using it as jquery plugin, maybe that's the problem? Thanks!

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  • Validate subset of a form using jQuery Validate plugin

    - by Andrew Davey
    My HTML form has a number of divs that are the steps of a wizard. Upon clicking a "next" button I want to validate just the active div. I'm using the jQuery.Validate.js plugin. Each div has an ID, so I want a way to say something like: wizardForm.validate().element('#first-step :input') but this only validates the first input, not all of them. How can I validate all inputs within a div?

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  • Java Program Specialization - What is it? I don't understand it..

    - by KP65
    I'm reading about program specialization - specifically java and I don't think I quite understand it to be honest. So far what I understand is that it is a method for optimizing efficiency of programs by constraining parameters or inputs? How is that actually done? Can someone maybe explain to me how it helps, and maybe an example of what it actually does and how its done? Thanks

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  • Display issue with jQuery dialog: form shows as separate window

    - by RememberME
    On my button click, the jQuery dialog appears with just the title and buttons. When you mouseover, then you see the form inputs in front of the dialog covering the buttons. When you scroll down, the form inputs do not move, so you can never see the last few textboxes. <div id="popupCreateCompany" title="Create a new company"> <form> <fieldset> <p> <label for="company_name">Company Name:</label> <%= Html.TextBox("company_name") %> </p> <p> <label for="company_desc">Company Description:</label> <%= Html.TextBox("company_desc") %> </p> <p> <label for="address">Address:</label> <%= Html.TextBox("address") %> </p> <p> <label for="city">City:</label> <%= Html.TextBox("city") %> </p> <p> <label for="state">State:</label> <%= Html.TextBox("state") %> </p> <p> <label for="zip">Zip:</label> <%= Html.TextBox("zip") %> </p> <p> <label for="website">Website:</label> <%= Html.TextBox("website") %> </p> </fieldset> </form> </div> jQuery: <script type="text/javascript"> $(document).ready(function() { $('input').filter('.datepick').datepicker(); $('#popupCreateCompany').dialog( { autoOpen: false, modal: true, buttons: { 'Add': function() { var dialog = $(this); var form = dialog.find('input:text'); $.post('/company/create', $(form).serialize(), function() { dialog.dialog('close'); }) }, 'Cancel': function() { $(this).dialog('close'); } } }); $("#create-company").click(function() { $('#popupCreateCompany').dialog('open'); }); On mouseover: After scroll down:

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