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Search found 3574 results on 143 pages for 'difficult'.

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• Convert Microsoft Visio Drawing (vsd) to PDF automatically

  - by nhinkle

  An open-source project I am working on uses Visio drawings for documentation, which are checked into source control. For those working on the project who don't own Visio, we have been converting the vsd files to PDFs so that they can still view them. It's not too difficult to save a copy as a PDF when making changes to the documentation, but we…

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• Modifying SQL Server Schema Collection

  - by Mevdiven

  SQL Server XML Schema Collection is an interesting concept and I find it very useful when designing dynamic data content. However as I work my way through implementing Schema Collections, I find it very difficult to maintain them. Schema Collection DDL allows only CREATE and ALTER/ADD nodes to existing schemes. CREATE XML SCHEMA COLLECTION […

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• Is it easier to write a recursive-descent parser using an EBNF or a BNF?

  - by Vivin Paliath

  I've got a BNF and EBNF for a grammar. The BNF is obviously more verbose. I have a fairly good idea as far as using the BNF to build a recursive-descent parser; there are many resources for this. I am having trouble finding resources to convert an EBNF to a recursive-descent parser. Is this because it's more difficult? I recall from my CS…

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• Simple comet example using php and jquery

  - by Ray

  I have searched on google for hours without finding a good and simple example of the comet technique using PHP. I just need an example that uses a persistent HTTP connection or something similar. I dont want to use a polling technique because I have something like that set up and not only is it difficult to work with and manage its a big…

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• Dealing with the lack of closures in Objective-C

  - by Sean Clark Hess

  Maybe it's just the fact that I've been using http://nodejs.org/ lately, but the lack of closures in Objective-C (iphone) has been really hard to work around. For example, I'm creating service classes. Each service class can have several methods, each of which makes a different URL request. I can use the delegate pattern, but that…

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• Code Alignment In SQL SERVER 2005

  - by user294488

  I am using SQL SERVER MANAGEMENT STUDIO. I want to know the shortcuts for easily aligning the T-SQL Queries and codes in a beautiful format for easy readability and understandablility. Please Let me know how to align the code without using any SQL SERVER FORMATTING / ALIGNING Tools. It is Urgent, Waiting for your kind reply at…

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• Lua pattern matching vs. regular expressions

  - by harald

  hello, i'm currently learning lua. regarding pattern-matching in lua i found the following sentence in the lua documentation on lua.org: Nevertheless, pattern matching in Lua is a powerful tool and includes some features that are difficult to match with standard POSIX implementations. as i'm familiar with posix regular…

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• Zedgraph - determine length of tic on an axis ?

  - by southof40

  In Zedgraph building a line chart. I have some requirements for axes labels which can't be produced automatically so inspired by this other Stackoverflow answer I'm building a custom axis. I can draw the Axis OK and I can place the labels but I want to draw my own tics. To do this I'd like to know the colour/pen width/size…

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• Should my connected web parts support IWebPartField, IWebPartRow and IWebPartData?

  - by Javaman59

  I've been writing some simple webparts, and they communicate via a custom interface type. That's working fine. I've got one ConnectionProvider, with a variety of ConnectionConsumers. I see that the OOTB SharePoint webparts provide many standard connections, apparently through IWebPartField and IWebPartRow (IWebPartData…

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• iPhone UIScrollView - How to animate scrolling with steady contents?

  - by timbos

  Hi all, I'm wondering if anyone knows how to prevent the contents of a uiscrollview from moving unsteadily when scrolling manually by setting the content offset. When scrolling by touch the text remains clear and steady. I would like to recreate this by animating with the animated option set to false. I'm using a…

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• Relating NP-Complete problems to real world problems

  - by terru

  I have a decent grasp of NP Complete problems; that's not the issue. What I don't have is a good sense of where they turn up in "real" programming. Some (like knapsack and traveling salesman) are obvious, but others don't seem obviously connected to "real" problems. I've had the experience several times of…

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• mySQL - query to combine two tables

  - by W.Gerick

  Hi there, I have two tables. The first one holds information about cities: Locations: locID | locationID | locationName | countryCode | 1 | 2922239 | Berlin | de | 2 | 291074 | Paris | fr | 3 | …

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• CSS / HTML centering a textbox

  - by Robert

  This should be easy but its proving difficult... My element I want centred is exactly this <input type="text"> I don't want the text centred, just the text box within the outer div. This is my attempt which is not working <div class ="temp123"> <input type="text" /> </div> …

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• Algorithm and data structure learning resources for dynamic programming

  - by Pranav

  Im learning dynamic programming now, and while I know the theory well, designing DP algorithms for new problems is still difficult. This is what i would really like now- A book or a website, which poses a problem which can be solved by dynamic programming. Also there is the solution with an explanation…

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• Adding audio channel using ffmpeg

  - by Raj

  Hi all, I am working on ffmpeg and trying to add a audio stream on the fly. I am using AudioQueues and I get raw audio buffer. I am encoding audio with linear PCM and hence the audio I get will be of raw format, which I know ffmpeg does accept it. But I cannot figure out how. I have looked into…

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• Seed data for grails application

  - by bsreekanth

  Hello, What is the best way to load seed (initial or test) data into grails application. I'm considering 3 options 1. Putting everything in *BootStrap.groovy files. This is tedious if the domain classes and test data are many. 2. Write custom functionality to load it through xml. May not be…

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• Recognizing when to use the mod operator

  - by Will

  I have a quick question about the mod operator. I know what it does; it calculates the remainder of a division. My question is, how can I identify a situation where I would need to use the mod operator? I know I can use the mod operator to see whether a number is even or odd and prime or…

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• Android Emulator starting in Flight-Mode

  - by Andhravaala

  Hi All, I have a small issue. I am running my application in emulator. For that it requires Network to simulate some traffic. But sometimes, on start-up my emulator is starting in Flight Mode. I am did not found any flags or settings to make it not to go to Flight-Mode. Can any one…

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• Problem's running unittest test suite OO

  - by chrissygormley

  Hello, I have a test suite to perform smoke tests. I have all my script stored in various classes but when I try and run the test suite I can't seem to get it working if it is in a class. The code is below: (a class to call the tests) from alltests import SmokeTests class…

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• Tips for resolving Hibernate/JPA EntityNotFoundException

  - by Damo

  I'm running into a problem with Hibernate where when trying to delete a group of Entities I encounter the following error: javax.persistence.EntityNotFoundException: deleted entity passed to persist: [com.locuslive.odyssey.entity.FreightInvoiceLine#<null>] These are…

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• How do I reduce number of redundant requests with mod_perl properly?

  - by rassie

  In a fairly big legacy project, I've refactored several hairy modules into Moose classes. Each of these modules requires database access to (lazy) fetch its attributes. Since those objects are used pretty heavily, I want to reduce the number of redundant requests, for…

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• Perl graph garbage collection usage

  - by Kevin

  Hi, I have built a tiny application in Perl that displays a graph over time. It graphs garbage collection usage over time. I use gnuplot to display the actual graph. This works fine if the time period is short, like a few hours. However, as the time increases (say…

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• iPad leak - NSPushAutoreleasePool

  - by Tim Bowen

  We are getting a sizable leak (16kb) that is proving very difficult to eliminate. The responsible library is Foundation and the Responsible frame is NSPushAutoreleasePool. This leak does not appear on the iPhone, only the iPad. We get the following stack trace: …

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• Best Fit Scheduling Algorithm

  - by Teegijee

  I'm writing a scheduling program with a difficult programming problem. There are several events, each with multiple meeting times. I need to find an arrangement of meeting times such that each schedule contains any given event exactly once, using one of each event's…

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• Is there a JSON parser for VB6 / VBA?

  - by Ben McCormack

  I'm trying to consume a web service in VB6. The service (which I control) currently can return a SOAP/XML message or JSON. I'm having a really difficult time figuring out if VB6's SOAP type (version 1) can handle a returned object (as opposed to simple types like…

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