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• Custom certificate as proof of transaction

  - by Andy

  I'm developing a site where a user conducts a given transaction and once completed, the user is issued with a 'secure certificate'. The certificate serves as proof of the transaction and the user is able to upload the certificate at a later stage, to view the details of the transaction. At the moment I'm using a custom XML document with encrypted fields. It works perfect, but I would like a standardized approach, such as an X.509 certificate. I'm no encryption expert, but from what I gather, X.509 is more geared towards SSL issued by a CA. Is it possible to create your own valid valid CRT file? As a test, I created a CRT file with the example provided on WikiPedia. However, when I open the file in Windows I get this warning: Invalid Public Key Security Object File - This file is invalid as the following: Security Certificate. Not having much luck here, so time to ask the experts. What direction should I be heading in? Any guidance would be greatly appreciated.

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• Routinely sync a branch to master using git rebase

  - by m1755

  I have a Git repository with a branch that hardly ever changes (nobody else is contributing to it). It is basically the master branch with some code and files stripped out. Having this branch around makes it easy for me to package up a leaner version of my project without having to strip out the code and files manually every time. I have been using git rebase to keep this branch up to date with the master but I always get this warning when I try to push the branch after rebasing: To prevent you from losing history, non-fast-forward updates were rejected Merge the remote changes before pushing again. See the 'Note about fast-forwards' section of 'git push --help' for details. I then use git push --force and it works but I feel like this is probably bad practice. I want to keep this branch "in sync" with the master quickly and easily. Is there a better way of handling this task?

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• R - Specifying colClasses in the read.csv

  - by Derek

  Hi, I am trying to specify the colClasses options in the read.csv function in R. In my data, the first column "time" is basically a character vector while the rest of the columns are numeric. data<-read.csv("test.csv" , comment.char="" , colClasses=c(time="character","numeric") , strip.white=FALSE) In the above command, I would want R to read in the "time" column as "character" and the as numeric. Although, the "data" variable did have the correct result after the command completed, R returned the following warnings. I am wondering how I could fix these warnings? Warning messages: 1: In read.table(file = file, header = header, sep = sep, quote = quote, : not all columns named in 'colClasses' exist 2: In tmp[i[i > 0L]] <- colClasses : number of items to replace is not a multiple of replacement length Thank in advance Derek

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• Avoiding cookies while requesting static content

  - by Abdel Olakara

  I just did an audit of one of my web application page (built using ASP.Net and running on development server) using Google chrome's developer tool. One particular warning caught my eyes: Serve static content from a cookieless domain (5)! Here is my screen shot (http://yfrog.com/7eauditresultp) as well. I would like to know is it possible to avoid cookies for these kind of requests. I see that there is no cookie requests for javascript files as well. I it possible to avoid cookies in the header for these files as well? and why didn't the browser attach cookies for javascript files and attach for CSS and image? Any thoughts and suggestions are welcome

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• problem with null column

  - by Iulian

  One column in my database (of type double) has some null values. I am executing a sored procedure to get the data in my app wipDBTableAdapters.XLSFacturiTableAdapter TAFacturi = new wipDBTableAdapters.XLSFacturiTableAdapter(); var dtfacturi = TAFacturi.GetData(CodProiect); Then i try to do something like this: if (dtfacturi[i].CANTITATE == null) { //do something } this is giving a warning : The result of the expression is always 'false' since a value of type 'double' is never equal to 'null' of type 'double? However when i run my code i get the following exception: StrongTypingException The value for column 'CANTITATE' in table 'XLSFacturi' is DBNull. How am I supposed to resolve this ?

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• How to ignore CDATA tags?

  - by Petre

  I'm trying to make an html parser, but when I load the html I get warnings like this Warning: DOMDocument::loadHTML() [domdocument.loadhtml]: Invalid char in CDATA 0x1C in Entity, line: 1302 Here is the code I use class Parser { public $url=null; public $html=null; public $tidy=null; public $head=null; public $head_xpath=null; function __construct($url){ $this->url=$url; $this->html=file_get_contents($this->url); $this->tidy=tidy_parse_string($this->html); $this->head=new DOMDocument(); $this->head->loadHTML($this->tidy->head()); $this->head_xpath= new DOMXPath($this->head); } } $x=new Parser("http://www.guardian.co.uk/politics/2012/mar/24/vince-cable-coalition-banking-row"); I searched around and found the LIBXML_NOCDATA constant, but I don't know how to set it. So how could i completely ignore CDATA?

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• jConfirm and onbeforeunload

  - by Dirty Bird Design

  I have a basic function to alert the user upon refresh, browser back button (except the submit button) or when a link is clicked they will lose form data from a form wizard. <script type="text/javascript"> var okToSubmit = false; window.onbeforeunload = function() { document.getElementById('Register').onclick = function() { okToSubmit = true; }; if(!okToSubmit) return "Using the browsers back button will cause you to lose all form data. Please use the Next and Back buttons on the form"; }; </script> Im using jAlert plug in for alerts and would like to use jConfirm for the function above. When I add jConfirm after "return" it works...for a second. it pops the warning and then the page refreshes and the dialog box goes away. Does anyone know how to fix this?

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• php, mySQL - how to create a table?

  - by user296516

  Hi guys, I have written a code that should check weather there is a table called imei.$addimei and, if not, create it... $userdatabase = mysqli_connect('localhost', 'root', 'marina', 'imei'); ... $result = mysqli_query($userdatabase, "SELECT * FROM imei".$addimei."" ); if ( !$result ) { echo('creating table...'); /// if no such table, make one! mysql_query ( $userdatabase, 'CREATE TABLE imei'.$addimei.'( ID int NOT NULL AUTO_INCREMENT, PRIMARY KEY(ID), EVENT varchar(15), TIME varchar(25), FLD1 varchar(35), FLD2 varchar(35), IP varchar(25), )' ); } Yet the CREATE TABLE somehow doesn't seem to work. Warning: mysql_query() expects parameter 1 to be string, object given in C:\xampp\xampp\htdocs\mobi\mainmenu.php on line 564 Any idea's what wrong? Thanks!

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• Can I ask Postgresql to ignore errors within a transaction

  - by fmark

  I use Postgresql with the PostGIS extensions for ad-hoc spatial analysis. I generally construct and issue SQL queries by hand from within psql. I always wrap an analysis session within a transaction, so if I issue a destructive query I can roll it back. However, when I issue a query that contains an error, it cancels the transaction. Any further queries elicit the following warning: ERROR: current transaction is aborted, commands ignored until end of transaction block Is there a way I can turn this behaviour off? It is tiresome to rollback the transaction and rerun previous queries every time I make a typo.

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• Python: override __init__ args in __new__

  - by EoghanM

  I have a __new__ method as follows: class MyClass(object): def __new__(cls, *args): new_args = [] args.sort() prev = args.pop(0) while args: next = args.pop(0) if prev.compare(next): prev = prev.combine(next) else: new_args.append(prev) prev = next if some_check(prev): return SomeOtherClass() new_args.append(prev) return super(MyClass, cls).__new__(cls, new_args) def __init__(self, *args): ... However, this fails with a deprecation warning: DeprecationWarning: object.__new__() takes no parameters SomeOtherClass can optionally get created as the args are processed, that's why they are being processed in __new__ and not in __init__ What is the best way to pass new_args to __init__? Otherwise, I'll have to duplicate the processing of args in __init__ (without some_check)

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• Vim: Delete Buffer When Quitting Split Window

  - by Rafid K. Abdullah

  I have this very useful function in my .vimrc: function! MyGitDiff() !git cat-file blob HEAD:% > temp/compare.tmp diffthis belowright vertical new edit temp/compare.tmp diffthis endfunction What it does is basically opening the file I am currently working on from repository in a vertical split window, then compare with it. This is very handy, as I can easily compare changes to the original file. However, there is a problem. After finishing the compare, I remove the split window by typing :q. This however doesn't remove the buffer from the buffer list and I can still see the compare.tmp file in the buffer list. This is annoying because whenever I make new compare, I get this message: Warning: File "temp/compare.tmp" has changed since editing started. Is there anyway to delete the file from buffers as well as closing the vertical split window?

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• Multiple schema validation in Java

  - by user279554

  Hi, I am trying to do multiple schema validation in Java. I don't understand where I am doing wrong. Any help will be appreciated. abc.xsd <?xml version="1.0" encoding="UTF-8"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xn="project-xml-r4j_another.xsd"> <xsd:import namespace="project-xml-r4j_another.xsd"/> <xsd:element name="abc" type="abc"> </xsd:element> <xsd:complexType name="abc"> <xsd:sequence> <xsd:element name="test" type="test" minOccurs="0" maxOccurs="1"> </xsd:element> <!--<xsd:element name="proj" type="xn:proj"/>--> </xsd:sequence> <xsd:attribute name="id" type="xsd:ID" use="required"/> </xsd:complexType> <xsd:complexType name="test"> <xsd:attribute name="id" type="xsd:ID" use="required"></xsd:attribute> <xsd:attribute name="value" use="required"> <xsd:simpleType> <xsd:restriction base="xsd:string"> <xsd:maxLength value="100" /> </xsd:restriction> </xsd:simpleType> </xsd:attribute> </xsd:complexType> </xsd:schema> project-xml-r4j_another.xsd <?xml version="1.0" encoding="UTF-8"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="project-xml-r4j_another.xsd" xmlns="project-xml-r4j_another.xsd" elementFormDefault="qualified" attributeFormDefault="unqualified"> <xsd:element name="proj" type="proj"> <xsd:annotation> <xsd:documentation> The project is the root tag of a project-xml. </xsd:documentation> </xsd:annotation> </xsd:element> <xsd:complexType name="proj"> <xsd:attribute name="id" type="xsd:ID" use="required"/> </xsd:complexType> </xsd:schema> Test case package test; import java.io.File; import java.io.IOException; import javax.xml.XMLConstants; import javax.xml.transform.Source; import javax.xml.transform.stream.StreamSource; import javax.xml.validation.Schema; import javax.xml.validation.SchemaFactory; import javax.xml.validation.Validator; import org.apache.log4j.Logger; import org.junit.Test; import org.xml.sax.SAXException; import org.xml.sax.SAXParseException; import org.xml.sax.helpers.DefaultHandler; import com.ericsson.ccrtool.core.project.projectxml.InvalidProjectXmlException; public class TestSchema { private static final Logger logger = Logger.getLogger(TestSchema.class); static final String W3C_XML_SCHEMA = XMLConstants.W3C_XML_SCHEMA_NS_URI; @Test public void test() { System.out.println("TestSchema.test()"); try { SchemaFactory schemaFactory = SchemaFactory.newInstance(W3C_XML_SCHEMA); // create a grammar object. Source [] source = { new StreamSource(new File("C:\\jaydeep\\Ericsson\\R5B\\abc.xsd")), new StreamSource(new File("C:\\jaydeep\\Ericsson\\R5B\\project-xml-r4j.xsd"))}; Schema schemaGrammar = schemaFactory.newSchema(source); Validator schemaValidator = schemaGrammar.newValidator(); schemaValidator.setErrorHandler(new MessageHandler()); // validate xml instance against the grammar. schemaValidator.validate(new StreamSource("C:\\jaydeep\\Ericsson\\R5B\\project_tmmk17cells_xnaveen_project-xml.xml")); } catch (SAXException e) { throw new InvalidProjectXmlException("Project-xml validation failed, Exception: " + e.getMessage(), e); } catch (IOException e) { throw new InvalidProjectXmlException("Project-xml validation failed, Exception: " + e.getMessage(), e); } } class MessageHandler extends DefaultHandler { private String errMessage = ""; @Override public void warning(SAXParseException e) { logger.info("Warning Line " + e.getLineNumber() + ": " + e.getMessage()); } @Override public void error(SAXParseException e) { errMessage = new String("Error Line " + e.getLineNumber() + ": " + e.getMessage()); logger.info(errMessage); throw new InvalidProjectXmlException("Project-xml validation failed, Exception: " + errMessage); } @Override public void fatalError(SAXParseException e) { errMessage = new String("Error Line " + e.getLineNumber() + ": " + e.getMessage()); logger.info(errMessage); throw new InvalidProjectXmlException("Project-xml validation failed, Exception: " + errMessage); } } } Thanks, Jaydeep

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• Problems installing rdoc, irb, bluecloth, chronic on fedora 12

  - by Vineeth

  Hello, What do these errors mean? [root@localhost config]# gem install bluecloth Building native extensions. This could take a while... ERROR: Error installing bluecloth: ERROR: Failed to build gem native extension. /usr/bin/ruby extconf.rb can't find header files for ruby. Gem files will remain installed in /usr/lib64/ruby/gems/1.8/gems/bluecloth-2.0.7 for inspection. Results logged to /usr/lib64/ruby/gems/1.8/gems/bluecloth-2.0.7/ext/gem_make.out [root@localhost config]# And this [root@localhost config]# gem install chronic Successfully installed json_pure-1.4.3 Successfully installed rubyforge-2.0.4 Successfully installed hoe-2.6.0 Successfully installed chronic-0.2.3 4 gems installed /usr/lib64/ruby/gems/1.8/gems/rdoc-2.5.8/lib/rdoc/ruby_lex.rb:67: warning: parenthesize argument(s) for future version ERROR: While executing gem ... (Gem::DocumentError) ERROR: RDoc documentation generator not installed: no such file to load -- irb/slex [root@localhost config]# I have installed rdocs using "yum install ruby-rdocs". But I don't understand what this error means

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• Scala - Enumeration vs. Case-Classes

  - by tzofia

  I've created akka actor called LogActor. The LogActors's receive method handling messages from other actors and logging them to the specified log level. I can distinguish between the different levels in 2 ways. The first one: import LogLevel._ object LogLevel extends Enumeration { type LogLevel = Value val Error, Warning, Info, Debug = Value } case class LogMessage(level : LogLevel, msg : String) The second: (EDIT) abstract class LogMessage(msg : String) case class LogMessageError(msg : String) extends LogMessage(msg) case class LogMessageWarning(msg : String) extends LogMessage(msg) case class LogMessageInfo(msg : String) extends LogMessage(msg) case class LogMessageDebug(msg : String) extends LogMessage(msg) Which way is more efficient? does it take less time to match case class or to match enum value? (I read this question but there isn't any answer referring to the runtime issue)

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• Creating a Large Matrix in ff

  - by Ryan Rosario

  I am trying to create a huge matrix in ff, and I know that ff is good for this sort of thing. But, there is a major problem. The dimensions of the matrix exceed .Machine$max_integer! I am running on a 64 bit machine, using 64bit R and 64bit ff. Is there any way to get around this problem? It's been suggested that R is using the MAXINT value from stdint.h. Is there any way to fix this without changing that file and possibly breaking build? > ffMatrix <- ff(vmode="boolean", dim=c(1e10,1e10)) Error in if (length < 0 || length > .Machine$integer.max) stop("length must be between 1 and .Machine$integer.max") : missing value where TRUE/FALSE needed In addition: Warning message: In ff(vmode = "boolean", dim = c(1e+10, 1e+10)) : NAs introduced by coercion > 1e+10 > .Machine$integer.max [1] TRUE

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• php send mail code not working

  - by anand

  php $to = "[email protected]"; $subject = "Hi!"; $body = "Hi,\n\nHow are you?"; if (mail($to, $subject, $body)) { echo("pMessage successfully sent!/p"); } else { echo("pMessage delivery failed.../p"); } wrote a basic php sendmail code that but it gives me the following error Warning: mail() [function.mail]: "sendmail_from" not set in php.ini or custom "From:" header missing in C:\xampp\htdocs\mail.php on line 5 Message delivery failed... i changed the php.ini file and put [email protected] but still the problem persists... writing the mail script for the first time Am i doing something wrong? is there a better code or way to go thru this? Any help will be appreciated Thank you

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• Related objects in reportingviewer 10.0.0.0 give #error

  - by Bart-Jan Poirot

  In my VB.net apps i make use of Linq2SQL and Reportviewer with RDLC reports. With Visual Studio 2010 they upgraded this reportviewer component so you can use the newer RDL specification from 2008. Now I've a problem to show related objects. For example assume you provide an order to the datasource of the report and then you can show something like Fields!Customer.Value.Name where Customer is a related entity. I also got the error in my immediate window: *Warning: The Value expression for the textrun ‘Name_1.Paragraphs[0].TextRuns[0]’ contains an error: The specified operation is not valid. (rsRuntimeErrorInExpression)*

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• Visual Studio Pre build events and batch set

  - by helloworld922

  Hi, I'm trying to create call a batch file which sets a bunch of environment variables prior to building. The batch file looks something like this (it's automatically generated before-hand to detect ATI Stream SDK or NVidia CUDA toolkit): set OCL_LIBS_X86="%ATISTREAMSDKROOT%libs\x86" set OCL_LIBS_X64="%ATISTREAMSDKROOT%libs\x86_64" set OCL_INCLUDE="%ATISTREAMSDKROOT%include" However, the rest of the build doesn't seem to have access to these variables, so when I try to reference $(OCL_INCLUDE) in the C/C++GeneralAdditional include directories, it will first give me warning that environment variable $(OCL_INCLUDE) was not found, and when I try to include CL/cl.hpp the compile will fail with: fatal error C1083: Cannot open include file: 'CL/cl.hpp': No such file or directory I know that I could put these variables into the registry if I wanted to access them from the visual studio GUI, but I would really prefer not to do this. Is there a way to to get these environment variables to stick after the pre-build events? I can't reference $(ATISTREAMSDKROOT) directly because the project must be able to build for both ATI Stream and NVidia Cuda.

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• SqlParameter contructor compiler overload choice

  - by Ash

  When creating a SqlParameter (.NET3.5) or OdbcParameter I often use the SqlParameter(string parameterName, Object value) constructor overload to set the value in one statement. When I tried passing a literal 0 as the value paramter I was initially caught by the C# compiler choosing the (string, OdbcType) overload instead of (string, Object). MSDN actually warns about this gotcha in the remarks section, but the explanation confuses me. Why does the C# compiler decide that a literal 0 parameter should be converted to OdbcType rather than Object? The warning also says to use Convert.ToInt32(0) to force the Object overload to be used. It confusingly says that this converts the 0 to an "Object type". But isn't 0 already an "Object type"? The Types of Literal Values section of this page seems to say literals are always typed and so inherit from System.Object. This behavior doesn't seem very intuitive given my current understanding? Is this something to do with Contra-variance or Co-variance maybe?

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• How to get Resharper to show a Refactoring that it already has.

  - by AngryHacker

  Whenever Resharper encounters code like this: (treeListNode.Tag as GridLine).AdvertiserSeparation = 5; it presents you with a possible fix (since treeListNode.Tag as GridLine might be null). It says: 'Replace with Direct Cast', which turns the code into the following: ((GridLine) treeListNode.Tag).AdvertiserSeparation = 5; This is great. However, when it encounters code like this: GridLine line = treeListNode.Tag as GridLine; line.AdvertiserSeparation = 5; Resharper simply displays a warning 'Possible System.NullReferenceException', but does not offer me to 'Replace with Direct Cast'. Is there a way to make Resharper offer me this refactoring, since it already has it?

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• PHP getimagesize with ampersand in string creates errors

  - by RobHardgood

  I'm using the getimagesize function in PHP, and the path string contains an ampersand, which otherwise is fine. The page gives me errors where getimagesize() is called. Looking at the source code, though, I see the ampersand is being passed through as & rather than just & I presume this is causing errors because PHP doesn't need to convert it to the html tag in order to find the path, right? Here is the error: Warning: getimagesize(image.php?name=username&pic=picture) [function.getimagesize]: failed to open stream: No such file or directory

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• "Socket operation on non-socket" error due to strange syntax

  - by Robert S. Barnes

  I ran across the error Socket operation on non-socket in some of my networking code when calling connect and spent a lot of time trying to figure out what was causing it. I finally figured out that the following line of code was causing the problem: if ((sockfd = socket( ai->ai_family, ai->ai_socktype, ai->ai_protocol) < 0)) { See the problem? Here's what the line should look like: if ((sockfd = socket( ai->ai_family, ai->ai_socktype, ai->ai_protocol)) < 0) { What I don't understand is why the first, incorrect line doesn't produce a warning. To put it another way, shouldn't the general form: if ( foo = bar() < baz ) do_something(); look odd to the compiler, especially running with g++ -Wall -Wextra? If not, shouldn't it at least show up as "bad style" to cppcheck, which I'm also running as part of my compile?

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• Chained inequality notation in programming languages

  - by Davorin

  Is there a programming language that supports chained notation a < b < c to be used instead of a < b and b < c in conditional statements? Example: if ( 2 < x < 5 ) if ( 2 < x && x < 5 ) First statementlooks better to me, it's easier to understand and the compiler could use transitivity property to warn about mistakes (e.g. 5 < x < 2 would give a warning).

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• Error in glmmadmb(.....) The function maximizer failed (couldn't find STD file)

  - by Joe King

  This works fine: fit.mc1 <-MCMCglmm(bull~1,random=~school,data=dt1,family="categorical", prior=list(R=list(V=1, fix=1), G=list(G1=list(V=1, nu=0))), slice=T) So does this: fit.glmer <- glmer(bull~(1|school),data=dt1,family=binomial) But now I am trying to work with the package glmmadmb and this does not work: fit.mc12 <- glmmadmb(bull~1+(1|school), data=dt1, family="binomial", mcmc=TRUE, mcmc.opts=mcmcControl(mcmc=50000)) It generates the error: Error in glmmadmb(bull~ 1 + (1 | school), data = dt1, family = "binomial", : The function maximizer failed (couldn't find STD file) In addition: Warning message: running command '<snip>\cmd.exe <snip>\glmmadmb.exe" -maxfn 500 -maxph 5 -noinit -shess -mcmc 5000 -mcsave 5 -mcmult 1' had status 1

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• Compiling Allegro source code (C#)

  - by 7331

  I am trying to build a C# project (downloaded code) in Visual Studio Express 2008. I get the error (my translation): The type or namespace name "Allegro" couldn't be found. for the line using Allegro; I know the 2D graphics library Allegro, of course, but I can't find much information on how to use it in C#. It is being used for visualization in the project I am trying to compile. I also get the warning This reference couldn't be resolved. The Universal assembly couldn't be found. I haven't been working with C# before and and I barely know Visual Studio Express. These are newbie mistakes - but I just need a fast solution for this problem. Could someone provide me with a short step-by-step solution?

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