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  • What is the gstreamer caps syntax?

    - by joeforker
    What is the syntax for caps, specifying media capabilities, in gstreamer? Caps are strings that specify the type of media allowed and look like "audio/x-raw-int,..." but I haven't been able to find good documentation on exactly what is allowed in a caps string.

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  • Lilypond: Customize bar lines, recursively, automatically?

    - by ananth.p
    I'm working on Carnatic music scores that involve complex time signatures, that will require modified bar lines Pattern for barlines for: 8/4 beats: 1 2 3 4 (dashed bar here) 5, 6 (Dotted Bar) 7, 8 (double bar) Here's one bar of actual score g16( f) d8 ees( ees) d16( c d8) bes16[( d c bes \bar "dashed" a g]) a[( bes c] d[ c d]) \bar ":" g8( f16) ees8( d16 c d) \bar "||" Is there a way to automate these barlines?

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  • regex count in single match

    - by 01
    i want to check if string doesnt have more than 5 numbers, i can do it this way Matcher matcher = Pattern.compile("\\d").matcher(val); i = 0; while (matcher.find()) { i++; } However i would like to do it without while(because we are using regex validation framework). I want to be able to match strings like A2sad..3f,3,sdasad2..2

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  • Read only drop down

    - by hakan
    Is there a good way to make an HTML dropdown read only. Using disabled attribute of select seems to work, but the value is not posted. <select disabled="disabled"> I have a complex page with lots of javascript and ajax. Some actions in the form cause to drop down to be read only some actions let user decide the value.

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  • How can I turn a string of text into a BigInteger representation for use in an El Gamal cryptosystem

    - by angstrom91
    I'm playing with the El Gamal cryptosystem, and my goal is to be able to encipher and decipher long sequences of text. I have come up with a method that works for short sequences, but does not work for long sequences, and I cannot figure out why. El Gamal requires the plaintext to be an integer. I have turned my string into a byte[] using the .getBytes() method for Strings, and then created a BigInteger out of the byte[]. After encryption/decryption, I turn the BigInteger into a byte[] using the .toByteArray() method for BigIntegers, and then create a new String object from the byte[]. This works perfectly when i call ElGamalEncipher with strings up to 129 characters. With 130 or more characters, the output produced is garbled. Can someone suggest how to solve this issue? Is this an issue with my method of turning the string into a BigInteger? If so, is there a better way to turn my string of text into a BigInteger and back? Below is my encipher/decipher code. public static BigInteger[] ElGamalEncipher(String plaintext, BigInteger p, BigInteger g, BigInteger r) { // returns a BigInteger[] cipherText // cipherText[0] is c // cipherText[1] is d BigInteger[] cipherText = new BigInteger[2]; BigInteger pText = new BigInteger(plaintext.getBytes()); // 1: select a random integer k such that 1 <= k <= p-2 BigInteger k = new BigInteger(p.bitLength() - 2, sr); // 2: Compute c = g^k(mod p) BigInteger c = g.modPow(k, p); // 3: Compute d= P*r^k = P(g^a)^k(mod p) BigInteger d = pText.multiply(r.modPow(k, p)).mod(p); // C =(c,d) is the ciphertext cipherText[0] = c; cipherText[1] = d; return cipherText; } public static String ElGamalDecipher(BigInteger c, BigInteger d, BigInteger a, BigInteger p) { //returns the plaintext enciphered as (c,d) // 1: use the private key a to compute the least non-negative residue // of an inverse of (c^a)' (mod p) BigInteger z = c.modPow(a, p).modInverse(p); BigInteger P = z.multiply(d).mod(p); byte[] plainTextArray = P.toByteArray(); String output = null; try { output = new String(plainTextArray, "UTF8"); } catch (Exception e) { } return output; }

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  • Can't build gem -- native extension build fails -- can you see why?

    - by marfarma
    I can't figure out what is going wrong here -- any ideas?? I'm running on a Ubuntu 8.04 LTS, and have installed libxml2 and libxslt from these instructions: http://www.techsww.com/tutorials/libraries/libxml/installation/installing_libxml_on_ubuntu_linux.php http://www.techsww.com/tutorials/libraries/libxslt/installation/installing_libxslt_on_ubuntu_linux.php However, I installed the latest versions: libxslt-1.1.24 libxml2-2.7.3 The install was uneventful -------------------- I set LD_LIBRARY_PATH ---------------------------------- echo $LD_LIBRARY_PATH /usr/local/libxslt/lib: ------------- seems like the function is present -- at least based on the output of strings ------------ /usr/local/libxslt/lib$ strings * | grep ParseStylesheetDoc xsltParseStylesheetDoc xsltParseStylesheetDoc xsltParseStylesheetDoc xsltParseStylesheetDoc xsltParseStylesheetDoc xsltParseStylesheetDoc xsltParseStylesheetDoc ----------------------- But the compile still fails ---------------------------------------- sudo gem install webrat Building native extensions. This could take a while... ERROR: Error installing webrat: ERROR: Failed to build gem native extension. /usr/local/bin/ruby extconf.rb install webrat checking for iconv.h in /opt/local/include/,/opt/local/include/libxml2,/opt/local/include,/opt/local/include,/opt/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/include,/usr/include/libxml2... yes checking for libxml/parser.h in /opt/local/include/,/opt/local/include/libxml2,/opt/local/include,/opt/local/include,/opt/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/include,/usr/include/libxml2... yes checking for libxslt/xslt.h in /opt/local/include/,/opt/local/include/libxml2,/opt/local/include,/opt/local/include,/opt/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/include,/usr/include/libxml2... yes checking for libexslt/exslt.h in /opt/local/include/,/opt/local/include/libxml2,/opt/local/include,/opt/local/include,/opt/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/local/include,/usr/local/include/libxml2,/usr/include,/usr/include/libxml2... yes checking for xmlParseDoc() in -lxml2... yes checking for xsltParseStylesheetDoc() in -lxslt... no libxslt is missing. try 'port install libxslt' or 'yum install libxslt-devel' *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/usr/local/bin/ruby --with-iconv-dir --without-iconv-dir --with-iconv-include --without-iconv-include=${iconv-dir}/include --with-iconv-lib --without-iconv-lib=${iconv-dir}/lib --with-xml2-dir --without-xml2-dir --with-xml2-include --without-xml2-include=${xml2-dir}/include --with-xml2-lib --without-xml2-lib=${xml2-dir}/lib --with-xslt-dir --without-xslt-dir --with-xslt-include --without-xslt-include=${xslt-dir}/include --with-xslt-lib --without-xslt-lib=${xslt-dir}/lib --with-xml2lib --without-xml2lib --with-xsltlib --without-xsltlib Gem files will remain installed in /usr/local/lib/ruby/gems/1.8/gems/nokogiri-1.3.3 for inspection. Results logged to /usr/local/lib/ruby/gems/1.8/gems/nokogiri-1.3.3/ext/nokogiri/gem_make.out

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  • Exception Handling in SQl Stored Procedures?

    - by Rishabh Ohri
    Hi All, Adding Exceptional Handling is a good practise, but I have a doubt, In our database we have 10 SPs which are accessed by our data access layer, there is not much logic and the queries are also not big.The purpose of keeping the queries in SPs was to allow paged data to be easily passed to the presentation layer. So, my question is, should error handling be added to the SPs in this scenario when they do not include large complex queries?

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  • String comparison in Objective-C

    - by james.ingham
    Hey, I've currently got a webserver set up which I communicate over SOAP with my iPhone app. I am returning a string containing a GUID and when I attempt to compare this with another string I get some strange results: Why would this not fire? Surely the two strings are a match? Thanks

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  • How could a quine in my programming language look?

    - by ads
    I have created a turing-complete programming language (already proven) so it must be possible to write a quine for it, right? But all quines I know store their source code in a string and then replace a special character in it using something like chr and ord. My language only has the following Basic arithmetics Int and string types Variables == operator Conditional gotos I have no idea how I could write a quine as I have no real string manipulation available, I can only output constant strings. Yet, it is 100% turing-complete.

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  • MEF and Prism integration

    - by Wasim
    Hi all , I need your advice deciding on a new project architecture I'm going to implement. Can I use MEF and Prism side by side? Is it too complex to accomplish this? Can make the same stuff Prism does with MEF? Right now, two features Prism gives, but are not in MEF are Regions and the Event Aggregator. Can I do everything else with MEF, rather than Prism? Thanks in advance ...

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  • What is the best scripting language to embed in a C# desktop application.

    - by Ewan Makepeace
    We are writing a complex rich desktop application and need to offer flexibility in reporting formats so we thought we would just expose our object model to a scripting langauge. Time was when that meant VBA (which is still an option), but the managed code derivative VSTA (I think) seems to have withered on the vine. What is now the best choice for an embedded scripting language on Windows .NET?

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  • C# encrypt whole XML File

    - by René
    I already have a solution for encrypting of several XML nodes or strings. But of course, you can open the local saved XML file and you should see the node tags. For some intelligent people it could be a reference for hidden informations. Is there any way to encrypt and decrypt the whole xml content including all node tags?

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  • WCF Translators

    - by chugh97
    Is there a better way in WCF werein we could avoid the translation betwee business entities and service entities, just to avoid the whole translator logic for complex entities.Any insight on this topic is welcome

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  • Perl String operations

    - by imerez
    I have a string with the following e.g. $workingFile = '/var/tmp/A/B/filename.log.timestamps.etc'; And two strings representing a dirs e.g. $dir = '/var/tmp'; $newDir = '/users/asdf'; I'd like to get the following: '/users/asdf/A/B/filename.log.timestamps.etc' However my Perl isnt up to much .. any pointers ? Thanks W

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  • How to load language file in joomla component

    - by jax
    I am creating a joomla component and want to externalise all my strings. I created the appropriate .ini file in the languages folder but when I rum JText::_('TEST_DATA'); It just prints out nothing (could not find the string). How do I tell Joomla to look in the .ini file I created for the component?

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  • What's the best way to trim std::string

    - by Milan Babuškov
    I'm currently using the following code to right-trim all the std::strings in my programs: std::string s; s.erase(s.find_last_not_of(" \n\r\t")+1); It works fine, but I wonder if there are some end-cases where it might fail? Of course, answers with elegant alternatives and also left-trim solution are welcome.

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  • Loading SQL dump before running Django tests

    - by knutin
    I have a fairly complex Django project which makes it hard/impossible to use fixtures for loading data. What I would like to do is to load a database dump from the production database server after all tables has bene created by the testrunner and before the actual tests start running. I've tried various "magic" in MyTestCase.setUp(), but with no luck. Any suggestions would be most welcome. Thanks.

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  • Regex to check that a character in range doesn't repeat

    - by Aly
    Hi, I want to match against Strings such as AhKs & AdKs (i.e. two cards Ah = Ace of Hearts). I want to match two off-suit cards with a regex, what I currently have is "^[AKQJT2-9][hscd]{2}$", but this could match hands such as AhKh (suited) and AhAh. Is there a way to possibly use backreferences to say the second [hscd] cannot be the same as the firs (similarly for [AKQJT2-9])

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  • WPF Writing custom Control

    - by Petoj
    I wanted to write a Custom Control that would show a family tree... so i looked on FamilyShow.... So their control inherits FrameworkElement but then every thing gets super complex... are there any easy tutorials out there that show how to implement a custom FrameworkElement with children and so on? Basically what i fail to do is this, Add child controls and show them, and when drawing getting the coordinates of the child controls...

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  • How do I compare between ByteString and ByteSymbol in squeak?

    - by Guy
    Hi, I want to execute the following code: methodName := thisContext sender method selector. aClass selectors do: [:current | current == methodName ifTrue: aBlock]. Although the strings are equal, it never steps into the "ifTrue", I've tried converting both of them to ByteArray\String and it steel didn't work. Any ideas of how to compare them so I will get to the "ifTrue"? Thanks in advance

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