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• Learn mp3 format and audio signal processing

  - by Shankhoneer Chakrovarty

  I am trying to learn the following things: How mp3 file looks like internally? I found this: http://mpgedit.org/mpgedit/mpeg_format/MP3Format.html but it seems old. Is there any recent changes to the format? I couldnt find any. How to open a mp3 file in java and look for bytes? I tried using audiostream but I am getting a lot of zeros and signed short integers which nowhere resemble the header/body format as mentioned in the above link. Am I wrong in interpreting the bytes? How to get amplitude, frequency and pitch of a mp3 file? No idea. Can you please suggest some book or tutorial? Can you please help me in getting the solution for the above questions? I am sorry if some questions appear to be naive, I am a just begun to learn mp3. Thanks

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• Dynamic case statement in bash

  - by infra.user

  Hi folks, I'm trying to figure out how to create a dynamic case statement in a bash script. For example, let's say I have the output of an awk statement with the following contents red green blue In this scenario, the output can change at any time. I'm trying to then execute different logic if a value is included in this awk output. So if the data above is in $list, then I'd conceptually like to do something like: case "${my_var}" in $list) ..... something_else) ..... esac I'm trying to use this to build a dynamic custom tab completion function (see http://www.debian-administration.org/article/An_introduction_to_bash_completion_part_2 for some background). Any ideas? Thanks.

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• Box2d Documentation - Outdated, any better api refs?

  - by GONeale

  Hi guys, I am working with cocos2d + box2d and as I look through the 'Hello World' tutorial and attempt others I am finding many constructs which do not seem to be documented in the latest api ref. Would anybody be able to shed some light on what's going on? or point me in the right direction to someone who has covered the new constructs such as b2PolygonDef changing to b2PolygonShape and likewise for circle + who knows what else, seems there has not been any doc updates since August '09. This is the only information I could find on the issue, of another user stating they have found many mismatches also. http://www.cocos2d-iphone.org/forum/topic/1683

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• WebKit and npapi and mingw-w64

  - by rubenvb

  Hi, The problem is the following: On Windows x64, pointers are 64-bit, but type long is 32-bit. MSVC doesn't seem to care, and even omits warnings about pointer truncation on the default warning level. Since recently, there is a GCC that target x86_64-w64-mingw32, or better Windows x64 native. GCC produces errors when pointers are truncated (which is the logical thing to do...), and this is causing trouble in WebKit and more specifically, the Netscape Plugin API: First, there's the files (I can only post one hyperlink...): http://trac.webkit.org/browser/trunk/WebCore/ bridge/npapi.h -- defines uint32 as 32-bit int type (~line 145) plugins/win/PluginViewWin.cpp -- casts Windows window handles to 32-bit int, truncating them (~line 450) My proposed fix was to change the uint32 casts to uintptr_t, which makes GCC happy, but still puts a 64-bit value in a uint32 (=unsigned long). I have no clue how to solve this, because clearly WebKit is happy truncating pointers on Win64... How can I solve this the right way? Thanks!

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• .NET equivalent to Perl regular expressions

  - by r_honey

  I need to convert a Perl script to VB.NET. I have managed almost the entire conversion, but some Perl (seemingly simple) regex are causing an headache. Can someone suggest me .NET equivalent of the following perl regex: 1) $letter =~ s/Users //,; $letter =~ s/Mailboxes //,; if($letter =~ m/$first_char/i){ 2) unless($storegroup =~ /Recovery/ || $storegroup =~ /Users U V W X Y Z/ || $storegroup =~ /Users S T/ || $storegroup =~ /Users Q R/){ The regex look simple to me. I tried to wade through perl.org but understanding a langugae regex takes sometime and I need to complete the conversion quickly.

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• CSS Vertical Spacing Issue (Margin?) - Vertical Space Between Two Divs

  - by Sootah

  I've got the layout of my site mostly done. On the domain I'm testing this layout on - http://networkgenius.org/ - there is a vertical space separating the content-wrapper div and the menu div. I have the margins set to 0px for the vertical spacing, and this is the only area that is separated like it is. I'd like the white content area to be pressed up right against the bottom of the menu, so that none of the body's background shows between them. What am I doing wrong?

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• java OutofMemoryError

  - by dqm

  I am running the following command on unix box. java -Xms3800m -Xmx3800m org.apache.xalan.xslt.Process -out Cust.txt -in test13l.xml -xsl CustDetails.xsl It is a java command, which calls Xalan processor to parse through the xml file (test131.xml) using the xsl stylesheet (CustDetails.xsl) and returns Cust.txt. The command works fine and the output is generated. It takes 12 minutes to process an xml file size of 1.1 GB. It takes 22 minutes to process a file size of 1.44 GB. However, when I try to process a file size of 1.66 GB, it errors out with the following message: (Location of error unknown)XSLT Error (java.lang.OutOfMemoryError): null I have increased the java heap size to 3800 not sure what I can do more. Many thanks for your help.

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• Database of common translated phrases for localization?

  - by richardtallent

  I'd like to localize my app into a few other languages, all of which I can barely order a drink in. Does anyone know of an online resource for translations of common software menu options, messages, etc. into other languages? Given the number of developers (both OSS and closed-source) that deal with localization, and the overlap of resource strings between, it seems like a pretty obvious fit for a wiki or open source package, but I can't seem to find anything like this. I could try to mine the Windows resource files or dig around in resource strings in robust OSS apps like Firefox, but I suspect I'm not the first person to think of this and surely there is a site that I'm just not finding yet. Update: since nothing exists like this that I could find, I started a feeble attempt at an open-source string library. It's just a boilerplate Google spreadsheet now, so if you want to contribute, please go here: http://www.xark.org/

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• Problem with Apache Commons Id UUID Version 1 generation

  - by Pekka Mattila

  My problem is to generate version 1 UUIDs. We use Jetty 6.x, Maven (to start Jetty among other things) and Apache Commons ID (to generate UUID version 1 from the current time). Apache Commons ID requires a configuration file that is told to the JVM, using a parameter, e.g. 'org.apache.commons.id.uuid.config.resource.filename=commons-id-uuid.xml'. I checked the Apache Commons ID code and it tries to find the file from the classpath. Jetty's documentation states that WEB-INF/lib and WEB-INF/classes are in the classpath. The 'commons-id-uuid.xml' can be found from the deployed war file from the root of WEB-INF/classes directory but Jetty cannot load it: Message: java.lang.RuntimeException: java.lang.IllegalStateException: commons-id-uuid.xml loaded as system resource is null Jetty was started using the following command: mvn jetty:run -Dorg.apache.commons.id.uuid.config.resource.filename=commons-id-uuid.xml Any idea what is going wrong? We just need to generate UUID version 1 identifiers. Any suggestions?

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• Error getting SVN repo of Liferay in Eclipse

  - by Tim

  Hello, Im using Eclipse Galileo and have installed Subclipse. I looked at the svn repo url at http://www.liferay.com/web/brian.chan/blog/-/blogs/changes-to-anonymous-access-to-liferay-s-svn and then tried to get Liferay from their SVN repository in Eclipse, using svn://svn.liferay.com/repos/public --username guest,but i get the following error message: Error validating location: "org.tigris.subversion.javahl.ClientException:No connection could be made because the target machine actively refused it. svn: Cant connect to host 'svn.liferay.com':No connection could be made because the target machine actively refused it Any way to fix this ? Thank You

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• How to occupy all the space in a div when working with min-height header / footer

  - by javacoder

  I believe this is a beginner's CSS question. I am utilizing the method described in http://www.xs4all.nl/~peterned/examples/csslayout1.html to fix a header to the top and a footer to the bottom. What I'd like to achieve now is two columns inside the content div. A left one of 200px and a right one that takes up the rest of the width. Unfortunately, I can't get the left and right divs to display correctly: they just don't grow vertically, and if I make the right div "width: 100%" it positions itself underneath the left one. What is the trick to make the left and right div take up all the space within the content div? The layout1.css is the original one. I just added two entries: #left and #right layout1.css: /** * 100% height layout with header and footer * ---------------------------------------------- * Feel free to copy/use/change/improve */ html,body { margin: 0; padding: 0; height: 100%; /* needed for container min-height */ background: gray; font-family: arial, sans-serif; font-size: small; color: #666; } h1 { font: 1.5em georgia, serif; margin: 0.5em 0; } h2 { font: 1.25em georgia, serif; margin: 0 0 0.5em; } h1,h2,a { color: orange; } p { line-height: 1.5; margin: 0 0 1em; } div#container { position: relative; /* needed for footer positioning*/ margin: 0 auto; /* center, not in IE5 */ width: 750px; background: #f0f0f0; height: auto !important; /* real browsers */ height: 100%; /* IE6: treaded as min-height*/ min-height: 100%; /* real browsers */ } div#header { padding: 1em; background: #ddd url("../csslayout.gif") 98% 10px no-repeat; border-bottom: 6px double gray; } div#header p { font-style: italic; font-size: 1.1em; margin: 0; } div#content { padding: 1em 1em 5em; /* bottom padding for footer */ } div#content p { text-align: justify; padding: 0 1em; } div#footer { position: absolute; width: 100%; bottom: 0; /* stick to bottom */ background: #ddd; border-top: 6px double gray; } div#footer p { padding: 1em; margin: 0; } // added the following: div#left { border: 1px solid red; width: 200px; float: left; min-height: 100%; height: 100%; padding-left: 10px; margin-right: 10px; } div#right { border: 1px solid blue; float: left; min-height: 100%; height: 100%; padding-left: 10px; margin-right: 10px; } layout.html: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>CSS Layout - 100% height</title> <link rel="stylesheet" type="text/css" href="layout1.css" /> </head> <body> <div id="container"> <div id="header"> <h1>header</h1> </div> <div id="content"> <div id="left"> left column </div> <div id="right"> right column </div> </div> <div id="footer"> <p> footer </p> </div> </div> </body>

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• implementing SRX Segmentation Rules in JavaScript

  - by Sourabh

  Hello , I want to implement the SRX Segmentation Rules using javascript to extract sentences from text. In order to do this correctly I will have to follow the SRX rules. eg. http://www.lisa.org/fileadmin/standards/srx20.html#refTR29 now there are two types of regular expressions if found sentence should break like ". " if found sentence should not break like abbreviation U.K or Mr. For this again there are two parts before breaking after breaking for example if the rule is <rule break="no"> <beforebreak>\s*[0-9]+\.</beforebreak> <afterbreak>\s</afterbreak> </rule> Which says if the pattern "\s*[0-9]+.\s" is found the segment should not break. how do I implement using javascript, my be split function is not enough ?

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• built-in schema datatype for html / xhtml

  - by John Clements

  Is there a built-in schema datatype for xhtml data? Suppose I want to specify a "boozle" element that contains two "woozles", each of which is arbitrary xhtml. I want to write something like this, using the relax NG compact syntax: namespace nifty = "http://brinckerhoff.org/nifty/" start = element nifty:boozle {woozle, woozle} woozle = element nifty:woozle {xhtml} Unfortunately, xmllint then signals this error: ./lab.rng:43: element ref: Relax-NG parser error : Reference xhtml has no matching definition ./lab.rng:43: element ref: Relax-NG parser error : Internal found no define for ref xhtml So my question is this: is there something sensible that I should put in place of "xhtml" above?

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• XmlSchemaElement type

  - by user305287

  Hi, I'm generating WSDL of my web service dynamically, but when I set the XmlSchemaType of my elements, the ServiceDescriptor writes the element as an element rather than message, as I need. The code looks like this: XmlSchemaElement schemaElement = new XmlSchemaElement(); XmlSchemaComplexType complexType = new XmlSchemaComplexType(); XmlSchemaSequence sequence = new XmlSchemaSequence(); foreach (XmlSchemaComplexElementParameter param in element.Parameters) { XmlSchemaElement paramElement = new XmlSchemaElement(); paramElement.Name = param.ParameterName; paramElement.SchemaTypeName = new XmlQualifiedName(param.ParameterType, "http://www.w3.org/2001/XMLSchema"); paramElement.MaxOccurs = param.MaxOccurs; paramElement.MinOccurs = param.MinOccurs; sequence.Items.Add(paramElement); } complexType.Particle = sequence; schemaElement.Name = element.MessageName; schemaElement.SchemaType = complexType; Any ideas about this?

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• XML Schema: xs:any processcontent="skip" but still returns error

  - by Jane Doe

  I wanted to embed HTML formatting and so I did <xs:element name="boobie"> <xs:complexType mixed="true"> <xs:sequence> <xs:any namespace="http://www.w3.org/1999/xhtml" minOccurs="0" maxOccurs="unbounded" processContent="skip"/> </xs:sequence> </xs:complexType> </xs:element> However, when I put li tag (dot point element for HTML) inside the XML file (inside boobie tag) it generates error that it is unexpected. What is wrong with this? is the only way to put html tag inside XMl file is to use CDATA?

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• Groovy: How to access objects with Id tag?

  - by skifan0

  Hello, I have the following Groovy+SwingBuilder code. In one panel I generate checkboxes and in another panel I want to access the values of the checkboxes. The code looks basically likes this: def optionsmap = [ foo : "value_foo", bar : "value_bar"] SwingBuilder.build() { frame(title:'demo1', size:[400,700], visible:true, defaultCloseOperation:WC.EXIT_ON_CLOSE) { gridLayout(rows: 1, cols: 2) panel(id:'optionPanel', constraints:java.awt.BorderLayout.CENTER) { gridLayout(rows: 5, cols: 1) myGroup = buttonGroup(); for (entry in optionsmap) { checkBox(id: entry.key, text: entry.value ) } } panel(constraints:java.awt.BorderLayout.WEST) { button ('Show values', actionPerformed: { for (entry in optionsmap) { println (entry.key as Class).text } }) } } } optionsmap is a map with (id, text) pairs that can be extended. When I press "show values" I get an error message: org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object 'foo' with class 'java.lang.String' to class 'java.lang.Class' How could I access the checkboxes for my action in the second panel by using the checkbox ids from optionsmap? Thank you if you can help

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• Producer/consumer in Grails?

  - by Mulone

  Hi all, I'm trying to implement a Consumer/Producer app in Grails, after several unsuccessful attempts at implementing concurrent threads. Basically I want to store all the events coming from a clients (through separate AJAX calls) in a single queue and then process such a queue in a linear way as soon as new events are added. This looks like a Producer/Consumer problem: http://en.wikipedia.org/wiki/Producer-consumer_problem How can I implement this in Grails (maybe with a timer or even better by generating an event 'process queue')? Basically I'd like to a have a singleton service waiting for new events in the queue and processing them linearly (even if the queue is loaded by several concurrent processes). Any hints? Cheers!

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• CSS3PIE: Internet Explorer 6 doesn't download PIE.htc

  - by Jonas

  I'm using the very impressive CSS3PIE (http://css3pie.com) library to add support for CSS3 styles in IE6-8. It works fine in versions 7 and 8 and took a lot of pain out of the process. However, in IE6 no CSS3 styles are shown at all. In fact, looking at the server logs, I can see that IE6 doesn't even download the PIE.htc file, which is necessary for the magic to work. The content type for the file is set correctly as text/x-component, it's referenced by absolute URL, and works fine in IE7 and 8. I'm using Compass (www.compass-style.org) and the PIE helper which makes the CSS look like this: #shopping_cart { behavior: url("/media/static/css/PIE.htc"); position: relative; border-radius: 10px; } I can't figure out what the problem is. Does anyone have any ideas what might cause IE6 to skip the behavior definition altogether? Cheers, Jonas

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• Python: Decent config file format

  - by miracle2k

  I'd like to use a configuration file format which supports key value pairs and nestable, repeatable structures, and which is as light on syntax as possible. I'm imagining something along the lines of: cachedir = /var/cache mail_to = me@example.org job { name = my-media frequency = 1 day source { from = /home/michael/Images source { } source { } } job { } I'd be happy with something using significant-whitespace as well. JSON requires too many explicit syntax rules (quoting, commas, etc.). YAML is actually pretty good, but would require the jobs to be defined as a YAML list, which I find slightly awkward to use.

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• Using an XML Catalog with a Java library that uses JAXP internally

  - by Brian Ferris

  I'm using the Apache web service xml rpc library to make requests to an rpc service. Somewhere in that process is a xml document with a DTD reference to http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd, which the library attempts to download when parsing the XML. That download fails with a 503 status code because the w3c is blocking repeated downloads of this largely static document from Java clients. The solution is XML Catalogs to locally cache the DTD. However, while I can find examples of setting an EntityHandler on a JAXP SAXParser instance directly to enable catalog parser support, I don't actually have access to the underlying parser here. It's just being used by the xml rpc library. Is there any way I can set a global property or something that will tell JAXP to use XML catalogs?

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• Gradle java.util.logging.Logger output in unit tests

  - by Misha Koshelev

  Dear All: Sorry this is probably a very simple question. I am using gradle http://www.gradle.org/ for my development environment. It works quite well! I have written a simple unit test that uses HtmlUnit and my own package. For my own package, I use java.util.Logger. HtmlUnit seems to use commons logging: http://htmlunit.sourceforge.net/logging.html I would like to see console output of my logging messages from java.util.Logger However, it seems that even messages at the info level are not displayed in my Unit Test Results GUI (System.err link), although the HtmlUnit messages are all displayed. Please let me know if you have suggestions. Thank you! Misha

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• Embed Javascript Module within Flex application

  - by Crimson

  I have a large module written in JS which uses Canvas to draw and animate trees. This module was written for a product which is now being migrated to flex. Is there a way in flex to embed this JS module as is? Or would I have to rewrite the whole module in AS3 (shudder)? Further, if embedding is possible, would user interactions (mouse clicks) etc. work seamlessly? An example of the tree structure I am talking about can be found here - http://thejit.org

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• HTTP Builder/Groovy - get source text _and_ XmlSlurper output?

  - by Misha Koshelev

  Dear All: I am reading here: http://groovy.codehaus.org/modules/http-builder/doc/get.html I seem to be able to get i) XMLSlurper output as parsed by NekoHTML using: def http = new HTTPBuilder('http://www.google.com') def html = http.get( path : '/search', query : [q:'Groovy'] ) ii) Raw text using: http.get( path : '/search', contentType : TEXT, query : [q:'Groovy'] ) { resp, reader -> println "response status: ${resp.statusLine}" println 'Headers: -----------' resp.headers.each { h -> println " ${h.name} : ${h.value}" } println 'Response data: -----' System.out << reader println '\n--------------------' } I am having some trouble and would like to get BOTH (i) and (ii) to debug my XmlSlurper code on the actual html I am getting. Any suggestions how I might go about doing this? I can easily instantiate an XmlSlurper object with the relevant string using the parseString(string) method or the parse(reader) method, but I cannot seem to get the Neko processing step correct. Any hints? Thank you! Misha

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• What happens when Npgsql connection pool reaches Max

  - by ClearCarbon

  Both the name of the connection string parameter and this blog post - http://fxjr.blogspot.co.uk/2010/04/npgsql-connection-pool-explained.html - lead me to believe that Npgsql wont exceed the MaxPoolSize value set in the connection string. However the docs (http://npgsql.projects.postgresql.org/docs/manual/UserManual.html) say "Max size of connection pool. Pooled connections will be disposed of when returned to the pool if the pool contains more than this number of connections. Default: 20" This suggests that the pool can actually grow larger than MaxPoolSize and it is in fact just a level at which Npgsql starts to aggressively remove connections from the pool as soon as they are returned. I've been searching to try and find an answer but I can find out exactly what happens when you reach MaxPoolSize. Anyone else know? edit: I should add we are using Npgsql 2.0.6.0 due to another dependency being supported only up to that version.

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• WCF Web Service chnage wsdl name and targetNamespace

  - by Graham

  All, I'm a little new to WCF over IIS but have done some ASMX web services before. My WCF service is up and running but the helper page generated by the web service for me has the default names, i.e. the page that says: You have created a service. To test this service, you will need to create a client and use it to call the service. You can do this using the svcutil.exe tool from the command line with the following syntax: svcutil.exe http://localhost:53456/ServicesHost.svc?wsdl In a standard ASMX site I would use method/class attributes to give the web service a name and a namespace. When I click on the link the WSDL has: <wsdl:definitions name="SearchServices" targetNamespace="http://tempuri.org/" i.e. not the WCF Service Contract Name and Namespace from my Interface. I assume the MEX is using some kind of default settings but I'd like to change them to be the correct names. How can I do this?

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