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• How to make a reference to a normal java class from GWT server side

  - by mohammed-qumhieh

  hello I building my project using GWT plugin for eclipse Galileo, after i done from RPC between the server and client, i trying to make a reference from gwt server side to normal java class in non-gwt-project, but every time i make an object from the class (which in non-gwt-project) gives me ClassNotFoundException. i did the buildpath for the gwt project, but still gives me the same exception, is there a way to make that from server side (not from client side). i need help please, i spent a lot of time searching for solution but i did not found anything. i appreciate any suggestions...thanks

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• Boost Python : How to only expose the constructor of a class with virtual (pure & impure) methods

  - by fallino

  Hello, I'm a newbie with Boost::Python but I tried to search on the web to do so I want to expose a 3rd party library to Python. One of the class of the library (.hpp) is composed of a public constructor with arguments a protected constructor and functions various regular functions various pure virtual functions various non pure virtual functions First, I did not succeed in building it without having errors about this protected constructor. I finally commented it. A first question would be : Is there a way to exclude these protected functions since I don't want to expose them ? (I know it's possible and easy with Py++, but I started without using it) Then I tried to expose all of my functions, beginning with the pure virtual ones (commenting them all except one), which wasn't a success too So I finally decided not to expose these virtual functions (which in fact seems logical...), but, here again, I didn't manage building it with a simple constructor with arguments (without no_init). So my second question is : Is there a way to exclude these virtual functions since I don't want to expose them ? Sorry if it seems trivial but I didn't find anything explicit on the web and I need something rather explicit :). Thanks in advance

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• Jython project in Eclipse can't find the Jython library, but works in an identical project

  - by Rob Lourens

  I have two projects in Eclipse with Java and Python code, using Jython. Also I'm using PyDev. One project can import and use the xml module just fine, and the other gives the error ImportError: No module named xml. As far as I can tell, all the project properties are set identically. The working project was created from scratch and the other comes from code checked out of an svn repository and put into a new project. What could be the difference?

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• non-class rvalues always have cv-unqualified types

  - by FredOverflow

  §3.10 section 9 says "non-class rvalues always have cv-unqualified types". That made me wonder... int foo() { return 5; } const int bar() { return 5; } void pass_int(int&& i) { std::cout << "rvalue\n"; } void pass_int(const int&& i) { std::cout << "const rvalue\n"; } int main() { pass_int(foo()); // prints "rvalue" pass_int(bar()); // prints "const rvalue" } According to the standard, there is no such thing as a const rvalue for non-class types, yet bar() prefers to bind to const int&&. Is this a compiler bug? EDIT: Apparently, this is also a const rvalue :)

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• Yahoo BOSS Python Library, ExpatError

  - by Wraith

  I tried to install the Yahoo BOSS mashup framework, but am having trouble running the examples provided. Examples 1, 2, 5, and 6 work, but 3 & 4 give Expat errors. Here is the output from ex3.py: gpython examples/ex3.py examples/ex3.py:33: Warning: 'as' will become a reserved keyword in Python 2.6 Traceback (most recent call last): File "examples/ex3.py", line 27, in <module> digg = db.select(name="dg", udf=titlef, url="http://digg.com/rss_search?search=google+android&area=dig&type=both&section=news") File "/usr/lib/python2.5/site-packages/yos/yql/db.py", line 214, in select tb = create(name, data=data, url=url, keep_standards_prefix=keep_standards_prefix) File "/usr/lib/python2.5/site-packages/yos/yql/db.py", line 201, in create return WebTable(name, d=rest.load(url), keep_standards_prefix=keep_standards_prefix) File "/usr/lib/python2.5/site-packages/yos/crawl/rest.py", line 38, in load return xml2dict.fromstring(dl) File "/usr/lib/python2.5/site-packages/yos/crawl/xml2dict.py", line 41, in fromstring t = ET.fromstring(s) File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 963, in XML parser.feed(text) File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 1245, in feed self._parser.Parse(data, 0) xml.parsers.expat.ExpatError: syntax error: line 1, column 0 It looks like both examples are failing when trying to query Digg.com. Here is the query that is constructed in ex3.py's code: diggf = lambda r: {"title": r["title"]["value"], "diggs": int(r["diggCount"]["value"])} digg = db.select(name="dg", udf=diggf, url="http://digg.com/rss_search?search=google+android&area=dig&type=both&section=news") Any help is appreciated. Thanks!

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• Issue with child of custom Decorator class in WPF

  - by galacticgrug

  I need a custom border that renders a little differently than a normal border. I made a class that inherited from Decorator as follows class BetterBorder : Decorator { protected override Size ArrangeOverride(Size arrangeSize) { return arrangeSize; } protected override void OnRender(DrawingContext dc) { //these values are calculated elsewhere dc.DrawGeometry(backgroundBrush, borderPen, pathGeometry); } } //Properties and helper methods below this All of this works fine until I try to add a child to the control, the control can be added but is not visible and seems to be moved off BetterBorders visible client area. If I inherit from Border everything works fine, what am I missing?

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• Is it possible to shorten my main function in this code?

  - by AjiPorter

  Is it possible for me to shorten my main() by creating a class? If so, what part of my code would most likely be inside the class? Thanks again to those who'll answer. :) #include <iostream> #include <fstream> #include <string> #include <ctime> #include <cstdlib> #define SIZE 20 using namespace std; struct textFile { string word; struct textFile *next; }; textFile *head, *body, *tail, *temp; int main() { ifstream wordFile("WORDS.txt", ios::in); // file object constructor /* stores words in the file into an array */ string words[SIZE]; char pointer; int i; for(i = 0; i < SIZE; i++) { while(wordFile >> pointer) { if(!isalpha(pointer)) { pointer++; break; } words[i] = words[i] + pointer; } } /* stores the words in the array to a randomized linked list */ srand(time(NULL)); int index[SIZE] = {0}; // temporary array of index that will contain randomized indexes of array words int j = 0, ctr; // assigns indexes to array index while(j < SIZE) { i = rand() % SIZE; ctr = 0; for(int k = 0; k < SIZE; k++) { if(!i) break; else if(i == index[k]) { // checks if the random number has previously been stored as index ctr = 1; break; } } if(!ctr) { index[j] = i; // assigns the random number to the current index of array index j++; } } /* makes sure that there are no double zeros on the array */ ctr = 0; for(i = 0; i < SIZE; i++) { if(!index[i]) ctr++; } if(ctr > 1) { int temp[ctr-1]; for(j = 0; j < ctr-1; j++) { for(i = 0; i < SIZE; i++) { if(!index[i]) { int ctr2 = 0; for(int k = 0; k < ctr-1; k++) { if(i == temp[k]) ctr2 = 1; } if(!ctr2) temp[j] = i; } } } j = ctr - 1; while(j > 0) { i = rand() % SIZE; ctr = 0; for(int k = 0; k < SIZE; k++) { if(!i || i == index[k]) { ctr = 1; break; } } if(!ctr) { index[temp[j-1]] = i; j--; } } } head = tail = body = temp = NULL; for(j = 0; j < SIZE; j++) { body = (textFile*) malloc (sizeof(textFile)); body->word = words[index[j]]; if(head == NULL) { head = tail = body; } else { tail->next = body; tail = body; cout << tail->word << endl; } } temp = head; while(temp != NULL) { cout << temp->word << endl; temp = temp->next; } return 0; }

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• Unit test class inherited from ContextBoundObject and decorated with ContextAttribute

  - by Joel Cunningham

  I am trying to retrofit unit tests on to some existing code base. Both the class and method I want to unit test is decorated with custom attributes that are inherited from ContextBoundObject and ContextAttribute. I dont want them to run as part of the unit test. The only solution I have come up with is to compile the attribute out when I want to unit test. I dont really like this solution and would prefer to either replace it with a mocked attribute at runtime or prevent the attribute from running in a more elegant way. How do you unit test code that has class and method attributes that inherit from ContextBoundObject and ContextAttribute that you dont want to run as part of a unit test? Thanks in advance.

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• How to write PIL image filter for plain pgm format?

  - by Juha

  How can I write a filter for python imaging library for pgm plain ascii format (P2). Problem here is that basic PIL filter assumes constant number of bytes per pixel. My goal is to open feep.pgm with Image.open(). See http://netpbm.sourceforge.net/doc/pgm.html or below. Alternative solution is that I find other well documented ascii grayscale format that is supported by PIL and all major graphics programs. Any suggestions? br, Juha feep.pgm: P2 # feep.pgm 24 7 15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 3 3 3 0 0 7 7 7 7 0 0 11 11 11 11 0 0 15 15 15 15 0 0 3 0 0 0 0 0 7 0 0 0 0 0 11 0 0 0 0 0 15 0 0 15 0 0 3 3 3 0 0 0 7 7 7 0 0 0 11 11 11 0 0 0 15 15 15 15 0 0 3 0 0 0 0 0 7 0 0 0 0 0 11 0 0 0 0 0 15 0 0 0 0 0 3 0 0 0 0 0 7 7 7 7 0 0 11 11 11 11 0 0 15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 edit: Thanks for the answer, I works... but I need a solution that uses Image.open(). Most of python programs out there use PIL for graphics manipulation (google: python image open). Thus, I need to be able to register a filter to PIL. Then, I can use any software that uses PIL. I now think mostly scipy, pylab, etc. dependent programs.

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• Free POP3 .NET library?

  - by Shawn Simon

  Looking for a POP3 Client for .NET that basically just lets me log into a server and grab all the emails out, and maybe send some. I grabbed Indy.Sockets off of CodePlex and got it running but its throwing errors trying to decode the mail headers. Really anything is fine if it works.

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• Subsume external library into source tree with Autotools.

  - by troutwine

  I am developing a new project, using Autotools for my build infrastructure. I would like to subsume external dependencies into my source tree. These dependencies are using Autotools, as well. How can I configure my project's build scripts to build and link against subsumed dependencies? Though Duret-Lutz's tutorial is excellent, this situation is only briefly addressed in a few slides. I found his explanation deeply confusing. By adding the directory name of subsumed dependencies to the toplevel Makefile.am's SUBDIRS the dependency is being configured and built. It is possible to manually set include paths through CFLAGS, but how do I link against libtool .la files?

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• Rails polymorphic associations, two assoc types in one class

  - by snitko

  Consider a class: class Link < ActiveRecord::Base has_many :link_votes, :as => :vote_subject, :class_name => 'Vote' has_many :spam_votes, :as => :vote_subject, :class_name => 'Vote' end The problem is, when I'm adding a new vote with @link.link_votes << Vote.new the vote_subject_type is 'Link', while I wish it could be 'link_votes' or something like that. Is this an AR limitation or is there a way to workaround this thing? I've actually found one related answer, but I'm not quite sure about what it says: http://stackoverflow.com/questions/1168047/polymorphic-association-with-multiple-associations-on-the-same-model/1764117#1764117

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• Audio fingerprinting library (java)

  - by Claudiu

  Are there any audio fingerprinting libraries written in Java? similar to libofa which was written in C++ or C#. Thanks.

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• How to exclude an HTML element ID or class using HTTrack or bash script

  - by pak memek

  I need to copy a website, but I want to exclude specific HTML element IDs and classes in all pages (using a bash script). I need this because I don't want ads or some other annoying features of some websites.

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• setting library include paths in c++

  - by Drew

  Hi all, I just installed gd2 using mac ports (sudo install gd2), which installed libraries in the following places: /opt/local/include/gd.h /opt/local/lib/libgd.dylib (link) /opt/local/lib/libgd.la /opt/local/lib/libgd.a So when I create my c++ app I add '#include "gd.h"', which throws: main.cpp:4:16: error: gd.h: No such file or directory If I set gd.h as an absolute path (as above)(not a solution, but was curious), I am thrown: g++ -L/opt/local/include -L/opt/local/lib main.o Heatmap_Map.o Heatmap_Point.o -o heatmap Undefined symbols: "_gdImagePng", referenced from: _main in main.o "_gdImageLine", referenced from: _main in main.o "_gdImageColorAllocate", referenced from: _main in main.o _main in main.o "_gdImageDestroy", referenced from: _main in main.o "_gdImageCreate", referenced from: _main in main.o "_gdImageJpeg", referenced from: _main in main.o ld: symbol(s) not found So, I understand this means that ld can not find the libraries it needs (hence trying to give it hints with the "-L" values). So after giving g++ the -L hints and the absolute path in #include, I can get it to work, but I don't think I have to do this, how can I make g++/ld search int eh right places for the libraries? Drew J. Sonne.

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• Serializing Class Derived from Generic Collection yet Deserializing the Generic Collection

  - by Stacey

  I have a Repository Class with the following method... public T Single<T>(Predicate<T> expression) { using (var list = (Models.Collectable<T>)System.Xml.Serializer.Deserialize(typeof(Models.Collectable<T>), FileName)) { return list.Find(expression); } } Where Collectable is defined.. [Serializable] public class Collectable<T> : List<T>, IDisposable { public Collectable() { } public void Dispose() { } } And an Item that uses it is defined.. [Serializable] [System.Xml.Serialization.XmlRoot("Titles")] public partial class Titles : Collectable<Title> { } The problem is when I call the method, it expects "Collectable" to be the XmlRoot, but the XmlRoot is "Titles" (all of object Title). I have several classes that are collected in .xml files like this, but it seems pointless to rewrite the basic methods for loading each up when the generic accessors do it - but how can I enforce the proper root name for each file without hard coding methods for each one? The [System.Xml.Serialization.XmlRoot] seems to be ignored. When called like this... var titles = Repository.List<Models.Title>(); I get the exception <Titlesxmlns=''> was not expected. The XML is formatted such as. .. <?xml version="1.0" encoding="utf-16"?> <Titles xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <Title> <Id>442daf7d-193c-4da8-be0b-417cec9dc1c5</Id> </Title> </Titles> Here is the deserialization code. public static T Deserialize<T>(String xmlString) { System.Xml.Serialization.XmlSerializer XmlFormatSerializer = new System.Xml.Serialization.XmlSerializer(typeof(T)); StreamReader XmlStringReader = new StreamReader(xmlString); //XmlTextReader XmlFormatReader = new XmlTextReader(XmlStringReader); try { return (T)XmlFormatSerializer.Deserialize(XmlStringReader); } catch (Exception e) { throw e; } finally { XmlStringReader.Close(); } }

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• Create a Python User() class that both creates new users and modifies existing users

  - by ensnare

  I'm trying to figure out the best way to create a class that can modify and create new users all in one. This is what I'm thinking: class User(object): def __init__(self,user_id): if user_id == -1 self.new_user = True else: self.new_user = False #fetch all records from db about user_id self._populateUser() def commit(self): if self.new_user: #Do INSERTs else: #Do UPDATEs def delete(self): if self.new_user == False: return False #Delete user code here def _populate(self): #Query self.user_id from database and #set all instance variables, e.g. #self.name = row['name'] def getFullName(self): return self.name #Create a new user >>u = User() >>u.name = 'Jason Martinez' >>u.password = 'linebreak' >>u.commit() >>print u.getFullName() >>Jason Martinez #Update existing user >>u = User(43) >>u.name = 'New Name Here' >>u.commit() >>print u.getFullName() >>New Name Here Is this a logical and clean way to do this? Is there a better way? Thanks.

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• Completely remove Postgres on Mac OSX Lion

  - by Nai

  I'm trying to get postgis running on my machine. Running brew install postgis seems to have installed postgres 9.2.1 on to my machine. I would like to remove my previous version 9.1.2 to keep my environment clean. Running brew uninstall postgres removes 9.2.1. What's the best way to do this? UPDATE nai@nyc ~ $ brew versions postgresql 9.2.1 git checkout ed92469 /usr/local/Library/Formula/postgresql.rb 9.2.0 git checkout 2f6cbc6 /usr/local/Library/Formula/postgresql.rb 9.1.5 git checkout 6b8d25f /usr/local/Library/Formula/postgresql.rb 9.1.4 git checkout c40c7bf /usr/local/Library/Formula/postgresql.rb 9.1.3 git checkout 05c7954 /usr/local/Library/Formula/postgresql.rb 9.1.2 git checkout dfcc838 /usr/local/Library/Formula/postgresql.rb 9.1.1 git checkout 4ef8fb0 /usr/local/Library/Formula/postgresql.rb 9.0.4 git checkout 2accac4 /usr/local/Library/Formula/postgresql.rb 9.0.3 git checkout b782d9d /usr/local/Library/Formula/postgresql.rb 9.0.2 git checkout 2c3b88a /usr/local/Library/Formula/postgresql.rb 9.0.1 git checkout b7fab6c /usr/local/Library/Formula/postgresql.rb 9.0.0 git checkout 1168d8f /usr/local/Library/Formula/postgresql.rb 8.4.4 git checkout c32bea0 /usr/local/Library/Formula/postgresql.rb 8.4.3 git checkout 237d1c5 /usr/local/Library/Formula/postgresql.rb

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• Linking against multiple shared libraries that all linked against a common static library

  - by live2dream95

  Say you have 2 share libraries, lib1.so and lib2.so, that both have libcommon.a statically linked into them. Would the compiler complain about ambiguous symbol reference if you were to dynamically link both lib1.so and lib2.so? Or would be the compiler be smart enough to know libcommon symbols are shared between lib1 and lib2 and allow you to dynamically link against both?

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• 256 color terminal library for Ruby?

  - by brianegge

  Is there a gem like 'Term::ANSIColor' which works with 256 color terminals? The perl script 256colors2.pl works great in my terminal, and I'd like to use some of these colors in my ruby scripts without manually inserting the ANSI codes.

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• A good Design-by-Contract library for Java?

  - by Chris Jones

  A few years ago, I did a survey of DbC packages for Java, and I wasn't wholly satisfied with any of them. Unfortunately I didn't keep good notes on my findings, and I assume things have changed. Would anybody care to compare and contrast different DbC packages for Java?

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• xaml nested class path designer issue

  - by Vlad Bezden

  Hi, I have nested class public class Enums { public enum WindowModeEnum { Edit, New } } In my xaml I reference code: <Style.Triggers> <DataTrigger Binding="{Binding WindowMode}" Value="{x:Static Types1:Enums+WindowModeEnum.Edit}"> <Setter Property="Visibility" Value="Collapsed" /> </DataTrigger> </Style.Triggers> Code compiles and runs properly, however I can't open xaml code in design window. I am getting following error: Type 'Types1:Enums+WindowModeEnum' was not found. at MS.Internal.Metadata.ExposedTypes.ValueSerializers.StaticMemberDocumentValueSerializer.ConvertToDocumentValue(ITypeMetadata type, String value, IServiceProvider documentServices) at MS.Internal.Design.DocumentModel.DocumentTrees.Markup.XamlMarkupExtensionPropertyBase.get_Value() at MS.Internal.Design.DocumentModel.DocumentTrees.DocumentPropertyWrapper.get_Value() at MS.Internal.Design.DocumentModel.DocumentTrees.InMemory.InMemoryDocumentProperty..ctor(DocumentProperty property, InMemoryDocumentItem item) at MS.Internal.Design.DocumentModel.DocumentTrees.InMemory.InMemoryDocumentItem.SetUpItem(DocumentItem item) Same error exist in VS2008, VS2010. Does anybody has any idea, how to deal with it so I can open window in design mode. Thanks a lot. Sincerely, Vlad.

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• autoconf libtool library linker path incorrect (need drive-letter) for MinGW ld.exe in Cygwin

  - by Tam Toucan

  I use autoconf and when the target is mingw I was using the -mno-cygwin flag. This has been removed so I'm trying to using the mingw tool chain. The problem is the linker isn't finding my libraries /bin/sh ../../../libtool --tag=CXX --mode=link mingw32-g++ -g -Wall -pedantic -DNOMINMAX -D_REENTRANT -DWIN32 -I /usr/local/include/w32api -L/usr/local/lib/w32api -o testRandom.exe testRandom.o -L../../../lib/Random -lRandom libtool: link: mingw32-g++ -g -Wall -pedantic -DNOMINMAX -D_REENTRANT -DWIN32 -I /usr/local/include/w32api -o .libs/testRandom.exe testRandom.o -L/usr/local/lib/w32api -L/home/Tam/src/3DS_Games/lib/Random -lRandom D:\cygwin\opt\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\mingw32\bin\ld.exe: cannot find -lRandom To link this from the command line using the mingw linker the -L path needs the drive letter i.e mingw32-ld testRandom.o -LD:/home/Tam/src/3DS_Games/lib/Random -lRandom works. The -L path is generated from the makefile.am's which have LDADD = -L$(top_builddir)/lib/Random -lRandom However I can't find how to set top_builddir to a relative path or to start it with the drive letter (my autoconf skills are weak). As a tempoary "solution" I have removed the use of libtool. I could hack a $(DRIVE_LETTER) infront of every -L option, but I'd like to find something better.

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• Using a member function pointer within a class

  - by neuviemeporte

  Given an example class: class Fred { public: Fred() { func = &Fred::fa; } void run() { int foo, bar; *func(foo,bar); } double fa(int x, int y); double fb(int x, int y); private: double (Fred::*func)(int x, int y); }; I get a compiler error at the line calling the member function through the pointer "*func(foo,bar)", saying: "term does not evaluate to a function taking 2 arguments". What am I doing wrong?

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• .net Value Class sorting with IComparable

  - by greggorob64

  I'm running into an issue using a DataGridView bound to a iBindingListView implementation (third party dll) attached to a large collection. There's a certain property in my collection type, named MyDateTime, which is a value class similar to DateTime, but also with some legacy code. This VALUE CLASS implements iComparable, iComparable<T>, and iEquatable<T>. The issue I'm having is this: When I apply a sort to the iBindingListView, or the Automatic Sorting provided by the DGV on the MyDateTimeColumn, it ALWAYS uses the non-generic iComparer, causing hundreds of thousands of unnecessary boxing and unboxing. When I remove the non-generic iComparer, the generic one is still not used, it just does a string compare on the .ToString(). Am I missing something? Why is my generic comparer not bieng called on a sort?

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