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  • Are today's young programmers getting wrapped around the axle with patterns and practices?

    - by Robert Harvey
    Recently I have noticed a number of questions on SO that look something like this: I am writing a small program to keep a list of the songs that I keep on my ipod. I'm thinking about writing it as a 3-tier MVC Ruby on Rails web application with TDD, DDD and IOC, using a factory pattern to create the classes and a singleton to store my application settings. Do you think I'm taking the right approach? Do you think that we're handing novice programmers a very sharp knife and telling them, "Don't cut yourself with this"? NOTE: Despite the humorous tone, this is a serious (and programming-related) question.

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  • how to scrawl file hosting website with scrapy in python?

    - by Veryel Hua
    Can anyone help me to figure out how to scrawl file hosting website like filefactory.com? I don't want to download all the file hosted but just to index all available files with scrapy. I have read the tutorial and docs with respect to spider class for scrapy. If I only give the website main page as the begining url I wouldn't not scrawl the whole site, because the scrawling depends on links but the begining page seems not point to any file pages. That's the problem I am thinking and any help would be appreciated!

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  • Are QR codes guaranteed to work?

    - by Kiz
    Not sure if this will get closed as "not a real question" but I asked this on Superuser and it was closed for that very reason. We are thinking of implementing a QR code which will be sent to a number of users via an email which links through to a webpage. Now I'm aware that you can just Google 'QR codes' and there are a plethora of options that allow you to make a QR code. My question is thus; if we do go with this solution can we guarantee that it would work cross platform? I.e. on Android, iOS, Symbian etc? Once a QR code is generated will it work on ANY app on ANY platform? Thanks and apologies if this is not really a 'programming question' Thanks Kiran

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  • Eval IronPython Scripts during ASP.NET Web Request; Static Engine or Not

    - by Josh Pearce
    I would like to create an ASP.NET MVC web application which has extensible logic that does not require a re-build. I was thinking of creating a filter which had an instance of the IronPython engine. What I would like to know is: how much overhead is there in creating a new engine during each web request, and would it be a better idea to keep a static engine around? However, if I were to keep a single static engine around, what are the issues I might run into as far as locking and script scope? Is it possible to have multiple scopes in the same IropPython engine so I don't get variable collision and security issues between web requests?

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  • Using SQL to get the Last Reply on a Post

    - by Anraiki
    I am trying to replicate a forum function by getting the last reply of a post. For clarity, see PHPBB: there are four columns, and the last column is what I like to replicate. I have my tables created as such: discussion_id (primary key) user_id parent_id comment status pubdate I was thinking of creating a Link Table that would update for each time the post is replied to. The link table would be as follow: discussion_id (primary key) last_user_id last_user_update However, I am hoping that theres a advance query to achieve this method. That is, grabbing each Parent Discussion, and finding the last reply in each of those Parent Discussions. Am I right that there is such a query?

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  • Flash AS3: automate property assignment to new instance from arguments in constructor

    - by matt lohkamp
    I like finding out about tricky new ways to do things. Let's say you've got a class with a property that gets set to the value of an argument in the constructor, like so: package{ public class SomeClass{ private var someProperty:*; public function SomeClass(_someProperty:*):void{ someProperty = _someProperty; } } } That's not exactly a hassle. But imagine you've got... I don't know, five properties. Ten properties, maybe. Rather then writing out each individual assignment, line by line, isn't there a way to loop through the constructor's arguments and set the value of each corresponding property on the new instance accordingly? I don't think that the ...rest or arguments objects will work, since they only keep an enumerated list of the arguments, not the argument names - I'm thinking something like this would be better: for(var propertyName:String in argsAsAssocArray){this[propertyName] = argsAsAssocArray[propertyName];} ... does something like this exist?

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  • How to test a .net application against a proxy?

    - by Pierre-Alain Vigeant
    I need to support the use of proxy on our application that is using WCF connections. We do not have any proxy server on our network and I don't want to disrupt our corporate network by requesting a proxy installation. I was thinking of installing a proxy server on a local virtual machine and configurating Internet Explorer so that it will challenge that proxy. I don't know what proxy software to use (I don't want to install ISA server) and I don't know how to configure one. Does someone have any suggestion for a easy to use software that will require an authentication for any WCF services and do you have any guideline that would be helpful to know when testing a software against a proxy?

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  • Is there a browser-agnostic way to detect client-side script errors with Watin?

    - by Michael
    We're using WatiN to test our web portals. During the course of an E2E test, we'll occasionally see client-side script errors on the IE status bar. I'd like to chain a handler onto the script error event and record the error for later analysis and bug filing. Problem is, I don't know that there's a global script error event or how to chain into it. And if there's not a browser-agnostic way to accomplish this, I can create MyIE and MyFF subclasses but then this becomes two browser-specific questions. In essence, I'm thinking of something like this entirely made-up call: browser.ScriptEngine.SetCustomErrorHandler(LogScriptingError); ... where LogScriptErrors is my code that does the obvious. Many of our client-side scripting errors don't necessarily prevent the test from continuing (a pretty UI element didn't animate, for example, but the underlying form is still submittable), so I'd like to log the error and forge ahead in most cases.

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  • Creating a "mountable" File System, where to start?

    - by Mike Curry
    A friend and I are thinking about creating a simple file system for learning purposes. We're going to write it in C/C++, and try to get it to a mountable state from within linux. We've both been coding or over 16 years (32 combined), so I suppose its just a matter of finding some documentation, and a ton of learning. My question is, where could I find out more information? (Documentation for creating a file system, requirements of mounting a file system in linux, etc) Where do we start? Edit: I should also mention, this would not be a boot-able file system, just a file system used for storage, though I am not too sure if that matters or not.

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  • Application settings methods? c++

    - by flyout
    I am thinking about adding configurable settings to an application, and I think the easiest ways are an external file or win registry (its a win only app). Which way would be better? I was wondering, an user with not enough permissions may not be able to create/write the config file. And in the case of the registry, would todays antivirus allow me to add/edit/remove keys? Or they only monitor certain keys? Also, if someone knows a class/lib to manage config settings (in pure win32) in vc++ please post it.

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  • Does it make a difference in performance if I use self.fooBar instead of fooBar?

    - by mystify
    Note: I know exactly what a property is. This question is about performance. Using self.fooBar for READ access seems a waste of time for me. Unnecessary Objective-C messaging is going on. The getters typically simply pass along the ivar, so as long as it's pretty sure there will be no reasonable getter method written, I think it's perfectly fine to bypass this heavy guy. Objective-C messaging is about 20 times slower than direct calls. So if there is some high-performance-high-frequency code with hundreds of properties in use, maybe it does help a lot to avoid unnessessary objective-c messaging? Or am I wasting my time thinking about this?

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  • Display/Hide part of a list

    - by superexsl
    Hi I have an (unordered)list (generated by a repeater) of items. However, I'd like to show the first three items, and have the rest hidden by the main content div. When a button is pressed, I would like the list's div to expand, pushing the main content div down and showing the rest of the list. I was thinking of using slideDown(), but that closes the entire div ( and I would like to show the first 3 items of the list). What would be the best way to achieve an effect like this? Is there a plugin that can easily show X items of a list and the display the rest upon request? Thanks

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  • Link to specific page on Google Document Viewer on iPad

    - by Debarupa De
    I am thinking of using the Google Document Viewer to show PDF files that are hosted by our company server. The scenario is: A webpage will contain a menu with menu items that are actually different pages of a PDF file. After clicking a menu item, that particular page from the pdf will be displayed on that same web page This project is targeted for mobile devices (iPad, for now) Now, I am using an iFrame like below: But I don't know if linking to a specific page is possible or Google would like that because I tried the solutions posted on how to open specific page on Google's docs viewer and http://googlesystem.blogspot.com/2009/11/link-to-page-in-googles-document-viewer.html but all of them seem to be outdated. Is this even possible? Thanks for any help.

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  • Best practice to pass a value from pop up control on iPad.

    - by Tattat
    It is an iPad app based on SDK 3.2. I have a MainUIView, that is subclass from UIView, it have a UIButton and a UILabel. When user press the UIButton, the pop up control will be appeared with a table view. When the user select a cell from the table view, the UILabel changes content base on the user click, and the pop up table view will disappear. The question is, how can I pass the "selected cell" to the UILabel. I am thinking making a "middle man" object. When the user click the UIButton, and the "middle man" will pass to the table. When the cell is selected, the "middle man" will store the idx, and call the UILabel change content from the value of "middle man". But I think it is pretty complex to implement, is there any easier way to implement it? thz u.

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  • How to merge on project / multiple files in VSS?

    - by Vijay
    I have VSS 6.0. I have branched my project so that I can do parallel development. I have 100s of files in folder/subfolders. I have changed some 10-20 files in multiple folders in ver 2 branch. Now I want to merge changes done in ver 2 to ver 1 branch. When I select the project merge branches option is not enabled. neither is it enabled when I select multiple files inside a folder. It's only enabled when one file is selected. Can I not merge on folder / multiple files in VSS 6.0. My thinking was when I do merge on project, VSS would pop up file names whenever there's a conflict (i.e files that are changed)

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  • Is there an algorithm for determining how much daylight there is?

    - by Pharaun
    Is there a function/algorithm that allows me to input the latitude and the approximate orbital position of the earth in so that I can determine how long the sun is up? IE during the winter it would show that the sun is only up a few hours in the far north hemisphere. I did some basic Google search and didn't find much so I was thinking that I might have to do some trigonometry that would allow me to calculate how much the earth is inclined or not toward the sun then use that information along with the latitude to figure out how much sunshine a site would be getting.

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  • Easy to use/learn PHP framework?

    - by Meredith
    I need to build a php app, and I was thinking about using a framework (never used one before). I've been browsing around some but most of them seems kinda complicated, I really liked what I saw about Symfony, but it looks like I will have to spend like a month until I really understand how to use it, and in one month I could code the app I have in mind 5 times without a framework. But I want to use one to "standardize" my code and prevent bugs. So I was wondering if someone could share with me which php frameworks you think are easier to learn how to use. My application will use mysql, and it will have some sort of "search engine" to search data that will be populated on the database using a few "scraper scripts" (that I also wants to code using the framework).

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  • implement string class with custom behavior

    - by truman
    In one of our class sir said that template allows one to customize behavior of class, and then he gave example of string class, that with few lines of code we can customize string class from STL, as in, we can make it to treat 'a' and 'z' same, 'b' and 'y' same, 'c' and 'x' same and so on. Similary 'A' and 'Z' same etc. "abc" == "zyx" is true; "Abc" == "zyx" is false; "Abc == "Zyx" is true; etc I was thinking of implementing such string class, but I am not able to do so. How can we implement such string class using templates?

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  • Reliably detect caller domain over cURL request?

    - by Utkanos
    OK so server-side security is not my forte. Basically, I'm building a service which users may use (via an SDK) only on the domain they stipulated when they signed up. The SDK calls my web service over cURL in PHP. Would I be right in thinking I cannot reliably detect the caller domain, i.e. enforce that it is the same domain they stipulated when signing up? cURL of course sends this over headers, but headers can always (?) be faked. Is there a better course of action to enforce domain for this sort of thing? (NB I'm already using an API key, too - it's just I wanted to restrict domain, too) Thanks in advance

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  • Best direction for displaying game graphics in C# App

    - by Mike Webb
    I am making a small game as sort of a test project, nothing major. I just started and am working on the graphics piece, but I'm not sure the best way to draw the graphics to the screen. It is going to be sort of like the old Zelda, so pretty simple using bitmaps and such. I started thinking that I could just paint to a Picture Box control using Drawing.Graphics with the Handle from the control, but this seems cumbersome. I'm also not sure if I can use double buffering with this method either. I looked at XNA, but for now I wanted to use a simple method to display everything. So, my question. Using the current C# windows controls and framework, what is the best approach to displaying game graphics (i.e. Picture Box, build a custom control, etc.)

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  • Preferred data-format for user-data in java applications?

    - by Frederik Wordenskjold
    I'm currently developing a desktop application in java, which stores user data such as bookmarks for ftp-servers. When deciding how to save these informations, I ended up using xml, simply because I like the way xpath works. I was thinking about json too, which seems more lightweight. What is your preferred way to store data in java desktop applications (in general) and why? What about java-persistence, does that have any advantages worth noting? And how much does the size of user data matter? Its not always possible to store data in a database (or preferable), and in my experience xml does not scale well. Let me know what you think!

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  • How to apply patterns when not all team members can follow them

    - by michael moore
    We're going to start a new huge project and while it's in the process of architecting the system, I have certain doubts whether I can apply patterns and be sure they won't be violated by team members. The problem is, not all team members have enough skills to develop asp.net apps let's say using MVP pattern. So maybe this question is addressed to Team leads, or experienced devs. Did you dealt with this kind of situation, and if so what was your solution. I was thinking to create the core by myself, and let 'em start building upon that core, however I'm not sure it will work out.

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  • Include a unique URL in EXE

    - by John Grey
    Hi :) I want to give users of my site the ability to upload their software/hardware configuration automatically on Windows. So I'm thinking of having an EXE file download, and somehow put in that EXE a unique URL for each user. When the data is collected, the program would just posts some JSON to that URL. How can I do it? I'm most familiar with .NET platform. Tools like this do exist, for example Blizzard uses this approach for their beta test enroll. Each user downloads a slightly different EXE. TIA

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  • How to programmatically generate WSDL from WCF service (Integration Testing)

    - by David Christiansen
    Hi All, I am looking to write some integration tests to compare the WSDL generated by WCF services against previous (and published) versions. This is to ensure the service contracts don't differ from time of release. I would like my tests to be self contained and not rely on any external resources such as hosting on IIS. I am thinking that I could recreate my IIS hosting environment within the test with something like... using (ServiceHost host = new ServiceHost(typeof(NSTest.HelloNS), new Uri("http://localhost:8000/Omega"))) { host.AddServiceEndpoint(typeof(NSTest.IMy_NS), new BasicHttpBinding(), "Primary"); ServiceMetadataBehavior behavior = new ServiceMetadataBehavior(); behavior.HttpGetEnabled = true; host.Description.Behaviors.Add(behavior); host.AddServiceEndpoint(typeof(IMetadataExchange), MetadataExchangeBindings.CreateMexHttpBinding(), "mex"); host.Open(); } Does anyone else have any better ideas?

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  • How to determine Windows Java installation location

    - by Lance May
    I'm trying to dynamically run a .jar from a C# assembly (using Process.Start(info)). Now, from a console application I am able to just run: ProcessStartInfo info = new ProcessStartInfo("java", "-jar somerandom.jar"); In an assembly, however, I keep getting a Win32Exception of "The system cannot find the file specified" and have to change the line to the full path of Java like so: ProcessStartInfo info = new ProcessStartInfo("C:\\Program Files\\Java\\jre6\\bin\\java.exe", "-jar somerandom.jar"); This obviously won't do. I need a way to dynamically (but declaratively) determine the installed location of Java. I started thinking of looking to the registry, but when I go there I noticed that there were specific keys for the versions and that they could not even be guaranteed to be numeric (e.g. "HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment\1.6" and "HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Runtime Environment\1.6.0_20"). What would be the most reliable "long-haul" solution to finding the most up-to-date java.exe path from a C# application? Thanks much in advance.

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