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  • What is the best file format to parse?

    - by anxiety
    Scenario: I'm working on a rails app that will take data entry in the form of uploaded text-based files. I need to parse these files before importing the data. I can choose the file type uploaded to the app; the software used by those uploading has several export options regarding file type. While it may be insignificant, I was wondering if there is a specific file type that is most efficiently parsed. This question can be viewed as language-independent, I believe. (While XML is commonly parsed, it is not a feasible file type for sake of this project.)

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  • Archiving Database Tables using Java

    - by HonorGod
    My application demands archiving database tables between sybase and db2 and vice-a-versa and within(db2 to db2 and sybase to sybase) using java. I am trying to understand the best strategies around in terms performance, implementation, ease of use and scalability. Here is my current process - source and destination tables with the acceptable parameters (from java) are defined within xml. the application reads the source and destination configurations and execute them sequentially. destination is sometime optional when source is just deleting data from a specific table or when the source is just calling a stored procedure. dataset between source and destination is extremely large (in millions) From top of my head, it looks like I can define dependencies between multiple source and destination combination and have them execute in parallel in multiple treads. But will this improve any performance(i hope it will)? Are there any open-source frameworks for data archiving using java? Any other thoughts on the implements side will be really helpful. Thanks

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  • Why There is a difference between assembly languages like Windows, Linux ?

    - by mcaaltuntas
    I am relatively new to all this low level stuff,assembly language.. and want to learn more detail. Why there is a difference between Linux, Windows Assembly languages? As I understand when I compile a C code Operating system does not really produce pure machine or assembly code, it produces OS dependent binary code.But why ? For example when I use a x86 system, CPU only understands x86 ASM am I right?.So Why we dont write pure x86 assembly code and why there are different assembly variations based on Operating system? If we would write pure ASM or OS produce pure ASM there wouldn't be binary compatilibty issues between Operating systems or Not ? I am really wondering all reasons behind them. Any detailed answer, article, book would be great. Thanks.

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  • Implement VOIP in iphone and ipad.

    - by user339994
    Hi, Does anybody is aware of implementing VOIP feature in iphone and ipad. The Things for which i need clarity is, By using which third party library/protocol can i implement this feature? or is der any in built classed available in objective c which i can make use of?? Is there any Apple store accepted iphone application which uses VOIP iplementation?? If so where can i get implementation details of it. This is a generic question. Can we use any third party's in our iphone application or do we need to get any special permission from Apple reg the usage of third party's used. Please let me know if needed more details reg this. Thanks , Santhana

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  • Cheap Wifi enabled Android or other programmable device

    - by Darran
    Does anyone know of a cheap Android or programmable device that has wifi? I need it for a project for a company that needs a wifi handheld device for the shop floor. Im not too fussed about the language the device uses though Im not really interested in the iTouch as theres no intention to release the app in the app store and I don`t really want to jail break everybodys iTouch. Ideally it would be small , iTouch size for example and relatively cheap $100 or less. Nothing fancy just ability to write a simple UI and have wifi. Voice is not needed. Not too fussed about touch or qwerty keyboard either.

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  • Socket left in TIME_WAIT after file transfer via netcat

    - by com
    Using Copying by NetCat I am trying to copy files throught network by NetCat. From console it work pretty well. First I run listening netcat on the destination machine and after I run sending on source machine. The problem is it's doen't work from script from the source machine: ssh -f user@$desthost 'nc -l 1234 | tar xvf - /dev/null &' #listening on destination host tar cv /tmp/file | nc $desthost 1234 #sending to destination host I saw that after running port 1234 is still was open and status of the socket was TIME_WAIT. If you know what's the problem, please, help me out. And by the way, after copying how can I validate that the content is identical? Thanks! Addendum: I found one very strange thing, the same implementation with screen on destination work works, but not stable, sometimes it doesn't copy a file. ssh user@$desthost screen -dm -S test 'nc -l 1234 | tar xvf - ' #listening on destination host Maybe there is an issue with timeout?

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  • Why does initWithFrame have the wrong frame value?

    - by greypoint
    I have a subclass of UIButton called INMenuCard and I am overriding the initWithFrame to include an activity indicator. The menuCard places correctly but any internal reference to "frame" give me "inf,inf,0,0" which means my activityIndicator subview is not placed correctly. What might I be missing? @implementation INMenuCard - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { CGRect innerFrame = CGRectInset(frame, 50.0f, 100.0f); activityIndicator = [[UIActivityIndicatorView alloc] initWithFrame:innerFrame]; activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhite; [self addSubview:activityIndicator]; } return self; } I am instantiating INMenuCard with (debugging shows the CGRect values are correct): CGRect cardFrame = CGRectMake(cardX, cardStartY, cardWidth, cardHeight); INMenuCard *menuCard = [[INMenuCard buttonWithType:UIButtonTypeCustom] initWithFrame:cardFrame]; [theView addSubView:menuCard];

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  • C# 2D Vector Graphics Game using DirectX or OpenGL?

    - by Brian
    Hey Guys, So it has been a while since I have done any game programming in C#, but I have had a recent bug to get back into it, and I wanted some opinions on what configuration I should use. I wanted to use C# as that is what I use for work, and have become vary familiar with. I have worked with both DirectX and OpenGL in the past, but mostly in 3D, but now I am interested in writing a 2D game with all vector graphics, something that resembles the look of Geometry Wars or the old Star Wars arcade game. Key points I am interested in: • Ease of use/implementation. • Easy on memory. (I plan on having a lot going on at once) • Looks good, I don't want curve to look pixelated. • Maybe some nice effects like glow or particle. I am open to any and all suggestions, maybe even something I have not thought of... Thanks in advance!

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  • How to presist the user authentication in SL3 + RIA

    - by Nair
    I am developing SL3 + RIA services with custom authentication. I followed the example in http://code.msdn.microsoft.com/RiaServices/Release/ProjectReleases.aspx?ReleaseId=2661 to implement custom authentication. Based on the implementation, you first do login request from client to service. This request is async process. Since login is async, the control will go back to GUI which then starts to do data bind in SL controls using RIA services, the services happens to requires the authentication to be successful (by adding [RequireAuthentication] attribute). The trouble is, since you requested login might not have completed before the data binding starts t this stage the authentication is false because of that data binding will fail. I would like to know if you require your web services to have 'RequireAuthentication' how would you wait for authentication to complete at the server side or client side. Appriciate the help. Thanks,

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  • Ruby/python Script to convert html text to plain text in csv file

    - by Miau
    Hi all: So i have a large(ish) file in a csv format, that contains a column that has html and i need to transform that to plain text (ie readable by people ,ie with no script tags) I dont have much experience with ruby, but it seems like the perfect language to do this The File should still be in a cv format after the parsing ( ie, other columns should nto be disturbed) Helpz? Fair enough, I thought there might be a library that does that as long as the html was valid. The file looks something liek this "xxxx-15454ss", "xome name", "<div class=""myClass""><strong>The Vintage Junior </strong>offers the same specs as the Vintage Series but only in 3/4 Size ideal for Kids. the 57 Model is great value for a good quality guitar. For more info go to <a href=""www.somehting.com"">something</a> </div> " I m trying to include the common html tags we would be using Thanks

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  • Outlook Mobile Service Configuration Issue

    - by cbeckner
    I am working on writing a OMS implementation. I have verified that service is compliant with the service and schema definitions. When trying to set up the account in Outlook 2007 to test the service, it allows me to use an https address, but not an http address. According to the documentation (http://msdn.microsoft.com/en-us/library/bb277363.aspx) "The URL of the OMS Web service can be either http or https, but it is https if not otherwise specified" I have not been able to find any doucmentation that would explain why Outlook will not even let me try to do anything in the wizard if the service url does not start with https. The error that it returns when a http address is entered is: The web service address is incorrect or corrupted. Check the web service address or contact your administrator I have also tried creating a temporary cert on my local machine to test the service, but outlook is rejecting the cert because it is not valid. Is there any way to test the service or run it over http?

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  • Zend + Wamp = Cant use curl/fput for a url locally

    - by bluedaniel
    Ive got a page in Zend all set up that will for now just echo "Hello", this address is at http://dev.local/hello and works when visiting in the browser. However when I try to use curl or file_get_contents from a script in my zend 'public' folder I get a 500 Internal error message. UPDATE Its failing because my application tries to set the langauge based on the browsers default language, when using headers like I have below, how do I add this locale? "User-Agent: XXXXXXX/2.0\r\n" . "Accept: */*\r\n" . "Accept-Charset: utf-8;\r\n" .

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  • how do I return to the same exact page after posting a form?

    - by William Calleja
    I'm posting data to a page called process.aspx that handles some business logic with the following code: <%@ Page Language="C#" %> <% MyData.process(Request); Response.Redirect("") %> this page I will be calling from a variety of pages. Is there some way of knowing from which page my form was submitted? I was thinking something along the lines of writing: <form id="frmSystem" method="post" action="process.aspx?page=<%= %>"> However I don't know what to write in between the <%= %> to get the current page name. Can anyone help please?

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  • General question: Filesystem or database?

    - by poeschlorn
    Hey guys, i want to create a small document management system. there are several users who store their files. each file which is uploaded contains an info which user uploaded it and the document content itself. In a view there are displayed all files of ONE specific user, ordered by date. What would be better: 1) giving the documents a name or metadata(XML) which contain the date and user (and iterate through them to get the metadata) or 2) giving the files a random/unique name and store metadata in a DB? something like this: date | user | filename What would you say and why? The used programming language is java and the DB is MySQL.

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  • Why is 'virtual' optional for overridden methods in derived classes?

    - by squelart
    When a method is declared as virtual in a class, its overrides in derived classes are automatically considered virtual as well, and the C++ language makes this keyword virtual optional in this case: class Base { virtual void f(); }; class Derived : public Base { void f(); // 'virtual' is optional but implied. }; My question is: What is the rationale for making virtual optional? I know that it is not absolutely necessary for the compiler to be told that, but I would think that developers would benefit if such a constraint was enforced by the compiler. E.g., sometimes when I read others' code I wonder if a method is virtual and I have to track down its superclasses to determine that. And some coding standards (Google) make it a 'must' to put the virtual keyword in all subclasses.

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  • How to parse a string to an integer without library functions?

    - by dack
    Hi, I was recently asked this question in an interview: "How could you parse a string of the form '12345' into its integer representation 12345 without using any library functions, and regardless of language?" I thought of two answers, but the interviewer said there was a third. Here are my two solutions: Solution 1: Keep a dictionary which maps '1' = 1, '2' = 2, etc. Then parse the string one character at a time, look up the character in your dictionary, and multiply by place value. Sum the results. Solution 2: Parse the string one character at a time and subtract '0' from each character. This will give you '1' - '0' = 0x1, '2' - '0' = 0x2, etc. Again, multiply by place value and sum the results. Can anyone think of what a third solution might be? Thanks.

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  • Java Enum Newbie Question

    - by ikurtz
    i have a situation where i need the Checker enum below used in multiple classes: package Sartre.Connect4; public enum Checker { EMPTY, RED, YELLOW } so i put the Checker in a Checker.java file and then from the classes that need it i simply do the following: example: public Cell(){ currentCell = Checker.EMPTY; } example: public Cell(Checker checker){ currentCell = checker; } and the code compiles fine and runs fine also. so what is my question? well being new to Java i am just wondering if the way i use Checker without encapsulating it in a class is a sound implementation? it may be because of The enum declaration defines a class (called an enum type). as noted in Java docs enum tutorial page. thank you for your insight into this matter.

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  • Instance where embedded C++ compilers don't support multiple inheritance?

    - by Nathan
    I read a bit about a previous attempt to make a C++ standard for embedded platforms where they specifically said multiple inheritance was bad and thus not supported. From what I understand, this was never implemented as a mainstream thing and most embedded C++ compilers support most standard C++ constructs. Are there cases where a compiler on a current embedded platform (i.e. something not more than a few years old) absolutely does not support multiple inheritance? I don't really want to do multiple inheritance in a sense where I have a child with two full implementations of a class. What I am most interested in is inheriting from a single implementation of a class and then also inheriting one or more pure virtual classes as interfaces only. This is roughly equivalent to Java/.Net where I can extend only one class but implement as many interfaces as I need. In C++ this is all done through multiple inheritance rather than being able to specifically define an interface and declare a class implements it.

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  • Project hosting on Google Code. Files are cahced?

    - by Frexuz
    I do not really understand how Google Code handles file versioning. I am building a jQuery plugin that anyone can access. Like so: <script type="text/javascript" src="http://jquery-old-browser-warning.googlecode.com/files/jquery.browser-warning.js"></script> This script accesses other files on the same project (via ajax). The problem is, that when I upload a new file, it just seems like there aren't any changed to it. Google recommends that new files should have new names. But then I would have to change the filenames that the script loads. But then I would have to change the script file as well, and that would break everybodys implementation (with the script-tag above) Is there a way to force a file to change when uploading with the same filename? PS: If I go directly to the project page's file list. Then I do get the file with the updated content. But as I said, not when getting it through ajax.

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  • Given a short (2-week) sprint, is it ever acceptable to forgo TDD to "get things done"?

    - by Ben Aston
    Given a short sprint, is it ever acceptable to forgo TDD to "get things done" within the sprint. For example a given piece of work might need say 1/3 of the sprint to design the object model around an existing implementation. Under this scenario you might well end up with implemented code, say half way through the sprint, without any tests (implementing unit tests during this "design" stage would add significant effort and the tests would likely be thrown away a few times until the final "design" is settled upon). You might then spend a day or two in the second week adding in unit / integration tests after the fact. Is this acceptable?

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  • Windows Phone: Updating backend datastore (via web service) while keeping UI very responsive

    - by will
    I am developing a Windows Phone app where users can update a list. Each update, delete, add etc need to be stored in a database that sits behind a web service. As well as ensuring all the operations made on the phone end up in the cloud, I need to make sure the app is really responsive and the user doesn’t feel any lag time whatsoever. What’s the best design to use here? Each check box change, each text box edit fires a new thread to contact the web service? Locally store a list of things that need to be updated then send to the server in batch every so often (what about the back button)? Am I missing another even easier implementation? Thanks in advance,

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  • Parsing adobe Kuler RSS feed

    - by dezkev
    I have been trying to parse the below XML file (kuler rss feed). I have read the various posts on this site but am unable to piece them together. I specifically want to extract the child(or siblings) nodes of the element <kuler:themeItem>. However I am getting an exception : Namespace Manager or XsltContext needed. This query has a prefix, variable, or user-defined function. Pl help : C# 3.0 net framework 3.5 RSS feed snippet: <?xml version="1.0" encoding="UTF-8" ?> - <rss xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:kuler="http://kuler.adobe.com/kuler/API/rss/" xmlns:rss="http://blogs.law.harvard.edu/tech/rss" version="2.0"> - <channel> <title>kuler recent themes</title> <link>http://kuler.adobe.com/</link> <description>most recent themes published on kuler (1 to 20 of 332518)</description> <language>en-us</language> <pubDate>Wed, 07 Apr 2010 08:41:31 PST</pubDate> <lastBuildDate>Wed, 07 Apr 2010 08:41:31 PST</lastBuildDate> <docs>http://blogs.law.harvard.edu/tech/rss</docs> <generator>Kuler Services</generator> <managingEditor>[email protected]</managingEditor> <webMaster>[email protected]</webMaster> <recordCount>332518</recordCount> <startIndex>0</startIndex> <itemsPerPage>20</itemsPerPage> - <item> <title>Theme Title: Muted Graph</title> <link>http://kuler.adobe.com/index.cfm#themeID/856075</link> <guid>http://kuler.adobe.com/index.cfm#themeID/856075</guid> - <enclosure xmlns="http://www.solitude.dk/syndication/enclosures/"> <title>Muted Graph</title> - <link length="1" type="image/png"> <url>http://kuler-api.adobe.com/kuler/themeImages/theme_856075.png</url> </link> </enclosure> <description><img src="http://kuler-api.adobe.com/kuler/themeImages/theme_856075.png" /><br /> Artist: tischt<br /> ThemeID: 856075<br /> Posted: 04/07/2010<br /> Hex: F1E9B2, 3D3606, 2A3231, 4A0A07, 424431</description> - <kuler:themeItem> <kuler:themeID>856075</kuler:themeID> <kuler:themeTitle>Muted Graph</kuler:themeTitle> <kuler:themeImage>http://kuler-api.adobe.com/kuler/themeImages/theme_856075.png</kuler:themeImage> - <kuler:themeAuthor> <kuler:authorID>216099</kuler:authorID> <kuler:authorLabel>tischt</kuler:authorLabel> </kuler:themeAuthor> <kuler:themeTags /> <kuler:themeRating>0</kuler:themeRating> <kuler:themeDownloadCount>0</kuler:themeDownloadCount> <kuler:themeCreatedAt>20100407</kuler:themeCreatedAt> <kuler:themeEditedAt>20100407</kuler:themeEditedAt> - <kuler:themeSwatches> - <kuler:swatch> <kuler:swatchHexColor>F1E9B2</kuler:swatchHexColor> <kuler:swatchColorMode>rgb</kuler:swatchColorMode> <kuler:swatchChannel1>0.945098</kuler:swatchChannel1> <kuler:swatchChannel2>0.913725</kuler:swatchChannel2> <kuler:swatchChannel3>0.698039</kuler:swatchChannel3> <kuler:swatchChannel4>0.0</kuler:swatchChannel4> <kuler:swatchIndex>0</kuler:swatchIndex> </kuler:swatch> My Code so far: static void Main(string[] args) { const string feedUrl = "http://kuler-api.adobe.com/rss/get.cfm?listtype=recent&key=xxxx"; var doc = new XmlDocument(); var request = WebRequest.Create(feedUrl) as HttpWebRequest; using (var response = request.GetResponse() as HttpWebResponse) { var reader = new StreamReader(response.GetResponseStream()); doc.Load(reader); } XmlNodeList rsslist = doc.SelectNodes("//rss/channel/item/kuler:themeItem"); for (int i = 0; i < rsslist.Count; i++) { XmlNode rssdetail = rsslist.Item(i).SelectSingleNode("kuler:themeTitle"); string title = rssdetail.InnerText; Console.WriteLine(title); } } }

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  • Beginner Design pattern question (Web Services involved)

    - by zombie
    Hi all ! I am a noob to web services world. I need to develop a login validator module and expose it as a service. I want it to be service independent, i.e I should have the option of exposing it as a SOAP service or REST service in the future. What pattern should I follow ? Sorry if I am unclear in my requirements, I can clarify as per need. Thanks !! Edit : I am using Eclipse as an IDE and Jersey libraries. I am not into any framework, simply using the MVC pattern. I find a lot of difference between SOAP ann REST methods, so I want my methods to be implementation independent - i.e I should be easily able to use my method through a SOAP or REST service call as per need. What should I do for maximum flexibility ?

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  • T4 Template Interception

    - by JeffN825
    I'm wondering if anyone out there knows of any T4 template based method interception systems? We are beginning to write mobile applications (currently with MonoTouch for IOS). We have a very nice core set of DI/IoC functionality and I'd like to leverage this in development for the new platform. Since runtime code generation Reflection.Emit is not supported, I'm hoping to use T4 templates to implement the dynamic interception functionality (+ TinyIoC as a container for resolution). We are currently using Castle Windsor (and intend to continue doing so for our SL and full .NET development), but all of the Windsor specific ties are completely encapsulated, so given a suitable T4 solution, it shouldn't be hard to implement an adapter that uses a T4 based implementation instead of Windsor.

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  • Why do date manipulation in Java with milliseconds?

    - by staticsan
    I was recently faced with the problem of calculating the number of days from two dates in Java (without using joda, I'm afraid). Searching on the 'net shows most answers to this question say to get the milliseconds of the two days and convert that to days, which I found appalling. However, a scant few show a different approach: use a temporary variable to count how many times it takes adding 1 day to the first date to get to the second. This leaves the conversions to the code that does it best: the library. Why do so many people advocate the first? In another project, I had previously encountered numerous subtle date calculation problems involving time-zones, daylight-saving and once even leap years using seconds to do date comparisions and calculations. All these went away when all the comparison and calculation code was rewitten to use the language libraries. (This was in PHP, though, where the libraries are structured quite differently to Java.) So I'm understandably reluctant to use this "common wisdom" in the world of Java about comparing dates.

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