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  • Pathfinding Algorithm For Pacman

    - by user280454
    Hi, I wanted to implement the game Pacman. For the AI, I was thinking of using the A* algorithm, having seen it on numerous forums. However, I implemented the Breadth First Search for some simple pathfinding (going from point a to point b with certain obstacles in between) and found it gave the optimum path always. I guess it might be because in a game like pacman which uses simple pathfinding, there is no notion of costs in the graph. So, will it be OK if I use BFS instead of A* for pathfinding in Pacman?

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  • Force SSRS 2008 to use SSRS 2005 CSV rendering

    - by Kash
    We are upgrading our report server from SSRS 2005 to SSRS 2008 R2. I have an issue with CSV export rendering for SSRS 2008 where the SUM of columns are appearing on the right side of the detail values in 2008 instead of the left side like in 2005 as shown in the below blocks. 117 and 131 are the sums of Column2 and Column3 respectively. SSRS 2005 CSV Output Column2_1,Column3_1,Column2,Column3 117,131,1,2 117,131,1,2 117,131,60,23 117,131,30,15 117,131,25,89 SSRS 2008 CSV Output Column2,Column3,Column2_1,Column3_1 1,2,117,131 1,2,117,131 60,23,117,131 30,15,117,131 25,89,117,131 I understand that the CSV renderer has gone through major changes in SSRS 2008 R2 with the support for charts and gauges and more importantly it provides 2 modes: the default Excel mode and Compliant mode. But neither mode helps fix this issue. The Compliant mode was supposed to be closest to that of 2005 but apparently it is not close enough for my case. My Question: Is there a way to force SSRS 2008 fall back a report to a backward compatibility mode so that it exports into a 2005 CSV format? Solution tried: a) Using 2005-based CRIs Based on this article on ExecutionLog2, if SSRS 2008 R2 encounters a report whose auto-upgrade is not possible (e.g. reports that were built with 2005-based CustomReportItem controls), those particular reports will be processed with the old Yukon engine in a "transparent backwards-compatibility mode". It seems like it falls back to its previous version mode (2005) and attempts to render it. So I tried using a 2005-based barcode CustomReportItem and deployed to a SSRS 2008 R2 report server, but it shows the same result as before though it suppressed the barcode. This would be because SSRS 2008 R2 finds a way to suppress part of the report output and displays the rest. It would be great to find a 2005-based CRI that makes SSRS 2008 R2 process it with its old Yukon engine. Please note that quite possibly, even if it uses the "old Yukon processing engine", it might still use the new CSV renderer hence it shows the same output. If that is true, then this option is moot. b) Using XML renderer We can use a custom XML renderer and then use XSLT to convert the xml to appropriate CSV but this would mean that we need to convert all our 200 reports. Hence this is not feasible. Please note that we do not have the option of having SSRS 2005 and SSRS 2008 R2 deployed side by side.

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  • Failed Castle ActiveRecord TransactionScope causes future queries to be invalid

    - by mbp
    I am trying to solve an issue when using a Castle ActiveRecord TransactionScope which is rolled back. After the rollback, I am unable to query the Dog table. The "Dog.FindFirst()" line fails with "Could not perform SlicedFindAll for Dog", because it cannot insert dogMissingName. using (new SessionScope()) { try { var trans = new TransactionScope(TransactionMode.New, OnDispose.Commit); try { var dog = new Dog { Name = "Snowy" }; dog.Save(); var dogMissingName = new Dog(); dogMissingName.Save(); } catch (Exception) { trans.VoteRollBack(); throw; } finally { trans.Dispose(); } } catch (Exception ex) { var randomDog = Dog.FindFirst() Console.WriteLine("Random dog : " + randomDog.Name); } } Stacktrace is as follows: Castle.ActiveRecord.Framework.ActiveRecordException: Could not perform SlicedFindAll for Dog ---> NHibernate.Exceptions.GenericADOException: could not insert: [Mvno.Dal.Dog#219e86fa-1081-490a-92d1-9d480171fcfd][SQL: INSERT INTO Dog (Name, Id) VALUES (?, ?)] ---> System.Data.SqlClient.SqlException: Cannot insert the value NULL into column 'Name', table 'Dog'; column does not allow nulls. INSERT fails. The statement has been terminated. ved System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) ved System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) ved System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) ved System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) ved System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) ved System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) ved System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) ved System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) ved System.Data.SqlClient.SqlCommand.ExecuteNonQuery() ved NHibernate.AdoNet.AbstractBatcher.ExecuteNonQuery(IDbCommand cmd) ved NHibernate.AdoNet.NonBatchingBatcher.AddToBatch(IExpectation expectation) ved NHibernate.Persister.Entity.AbstractEntityPersister.Insert(Object id, Object[] fields, Boolean[] notNull, Int32 j, SqlCommandInfo sql, Object obj, ISessionImplementor session) --- End of inner exception stack trace --- ved NHibernate.Persister.Entity.AbstractEntityPersister.Insert(Object id, Object[] fields, Boolean[] notNull, Int32 j, SqlCommandInfo sql, Object obj, ISessionImplementor session) ved NHibernate.Persister.Entity.AbstractEntityPersister.Insert(Object id, Object[] fields, Object obj, ISessionImplementor session) ved NHibernate.Action.EntityInsertAction.Execute() ved NHibernate.Engine.ActionQueue.Execute(IExecutable executable) ved NHibernate.Engine.ActionQueue.ExecuteActions(IList list) ved NHibernate.Engine.ActionQueue.ExecuteActions() ved NHibernate.Event.Default.AbstractFlushingEventListener.PerformExecutions(IEventSource session) ved NHibernate.Event.Default.DefaultAutoFlushEventListener.OnAutoFlush(AutoFlushEvent event) ved NHibernate.Impl.SessionImpl.AutoFlushIfRequired(ISet`1 querySpaces) ved NHibernate.Impl.SessionImpl.List(CriteriaImpl criteria, IList results) ved NHibernate.Impl.CriteriaImpl.List(IList results) ved NHibernate.Impl.CriteriaImpl.List() ved Castle.ActiveRecord.ActiveRecordBase.SlicedFindAll(Type targetType, Int32 firstResult, Int32 maxResults, Order[] orders, ICriterion[] criteria) --- End of inner exception stack trace --- ved Castle.ActiveRecord.ActiveRecordBase.SlicedFindAll(Type targetType, Int32 firstResult, Int32 maxResults, Order[] orders, ICriterion[] criteria) ved Castle.ActiveRecord.ActiveRecordBase.FindFirst(Type targetType, Order[] orders, ICriterion[] criteria) ved Castle.ActiveRecord.ActiveRecordBase.FindFirst(Type targetType, ICriterion[] criteria) ved Castle.ActiveRecord.ActiveRecordBase`1.FindFirst(ICriterion[] criteria)

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  • football manager facebook application

    - by jeansymolanza
    hey guys i'm about to begin a football manager inspired facebook application in php/mysql and had a couple of questions: 1) where would be the best place to host the database? any services offered within great britain would be excellent! 2) does anyone have any ideas on how i could use player statistics as part of the in-game match engine? how would php accomodate this? i would like to make the matches as realistic as possible? 3) lastly i wanted to know whether php/mysql would be the best language to code this game in. i am quite confident within this language and can pick up new skills relatively quickly. but i am worried once again (in reference to number 2) about how i would simulate matches using the data from php. i'd appreciate any pointers. thanks for the help guys!

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  • Rspec2, Rails3, Authlogic: Can't run specs

    - by Sam
    When I do rspec spec in my rails project, I get No examples were matched. Perhaps {:if=>#<Proc:0x0000010126e998@/Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/rspec-core-2.3.1/lib/rspec/core/configuration.rb:50 (lambda)>, :unless=>#<Proc:0x0000010126e970@/Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/rspec-core-2.3.1/lib/rspec/core/configuration.rb:51 (lambda)>} is excluding everything? Finished in 0.00004 seconds 0 examples, 0 failures Now, this seems like maybe if I wrote a spec it would work, but as soon as I write a spec (and I do include spec_helper) /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/rspec-core-2.3.1/lib/rspec/core/backward_compatibility.rb:20:in `const_missing': uninitialized constant Authlogic (NameError) from /{myapp}/app/models/user_session.rb:1:in `<top (required)>' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/engine.rb:138:in `block (2 levels) in eager_load!' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/engine.rb:137:in `each' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/engine.rb:137:in `block in eager_load!' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/engine.rb:135:in `each' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/engine.rb:135:in `eager_load!' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/application.rb:108:in `eager_load!' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/application/finisher.rb:41:in `block in <module:Finisher>' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/initializable.rb:25:in `instance_exec' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/initializable.rb:25:in `run' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/initializable.rb:50:in `block in run_initializers' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/initializable.rb:49:in `each' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/initializable.rb:49:in `run_initializers' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/application.rb:134:in `initialize!' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/railties-3.0.3/lib/rails/application.rb:77:in `method_missing' from /{myapp}/config/environment.rb:5:in `<top (required)>' from <internal:lib/rubygems/custom_require>:29:in `require' from <internal:lib/rubygems/custom_require>:29:in `require' from /{myapp}/spec/spec_helper.rb:3:in `<top (required)>' from <internal:lib/rubygems/custom_require>:29:in `require' from <internal:lib/rubygems/custom_require>:29:in `require' from /{myapp}/spec/controllers/pages_controller_spec.rb:1:in `<top (required)>' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/rspec-core-2.3.1/lib/rspec/core/configuration.rb:388:in `load' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/rspec-core-2.3.1/lib/rspec/core/configuration.rb:388:in `block in load_spec_files' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/rspec-core-2.3.1/lib/rspec/core/configuration.rb:388:in `map' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/rspec-core-2.3.1/lib/rspec/core/configuration.rb:388:in `load_spec_files' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/rspec-core-2.3.1/lib/rspec/core/command_line.rb:18:in `run' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/rspec-core-2.3.1/lib/rspec/core/runner.rb:55:in `run_in_process' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/rspec-core-2.3.1/lib/rspec/core/runner.rb:46:in `run' from /Users/samliu/.rvm/gems/ruby-1.9.2-p0@rails3/gems/rspec-core-2.3.1/lib/rspec/core/runner.rb:10:in `block in autorun' The important line here seems to be /core/backward_compatibility.rb:20:in `const_missing': uninitialized constant Authlogic (NameError) Now if this were rails 2.3.8, I'd simply put config.gem "authlogic" into the environment.rb, in the initialization code block. However, the rails 3 environment.rb looks way different (there is no config code block, so putting it in arbitrarily causes an error where config is not defined). So my questions are 1) Do I actually have to put the gem config anywhere? I looked at https://github.com/trevmex/authlogic_rails3_example/ and it seems he didn't put it anywhere. 2) Does anyone know what I'm doing wrong in terms of rspec? My gem list is *** LOCAL GEMS *** abstract (1.0.0) actionmailer (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.4) actionpack (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.4) activemodel (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2) activerecord (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.4) activeresource (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.4) activesupport (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2, 2.3.4) arel (2.0.6, 1.0.1) asdf (0.5.0) authlogic (2.1.6, 2.1.3) autotest (4.4.6, 4.4.1) autotest-fsevent (0.2.4) autotest-growl (0.2.9) autotest-rails (4.1.0) autotest-rails-pure (4.1.2) bluecloth (2.0.9) builder (2.1.2) bundler (1.0.7, 1.0.2) cgi_multipart_eof_fix (2.5.0) commonwatir (1.6.2) couchrest (0.33) cri (1.0.1) cucumber (0.4.4, 0.4.3, 0.3.11) daemons (1.1.0, 1.0.10) dependencies (0.0.7) diff-lcs (1.1.2) erubis (2.6.6) fastercsv (1.5.0) fastthread (1.0.7) firewatir (1.6.2) flay (1.4.0) flog (2.2.0) funfx (0.2.2) gem_plugin (0.2.3) gemsonrails (0.7.2) giraffesoft-resource_controller (0.6.5) haml (2.2.14) hoe (2.3.3) i18n (0.4.1) jscruggs-metric_fu (1.1.5) json_pure (1.1.9) kramdown (0.12.0) mail (2.2.13, 2.2.6.1) memcache-client (1.8.5) mime-types (1.16) mojombo-chronic (0.3.0) mongrel (1.1.5) monk (0.0.7) nanoc (3.1.5) nanoc3 (3.1.5) nokogiri (1.4.3.1, 1.4.0) open4 (0.9.6) polyglot (0.3.1, 0.2.9) rack (1.2.1, 1.0.1) rack-mount (0.6.13) rack-test (0.5.6) rails (3.0.0, 2.3.4) rails3-generators (0.17.0, 0.14.0) railties (3.0.3, 3.0.1, 3.0.0, 3.0.0.rc2) rake (0.8.7) relevance-rcov (0.9.2.1) rest-client (1.0.3) rspec (2.3.0, 2.0.0.rc, 1.2.9) rspec-core (2.3.1, 2.0.0.rc) rspec-expectations (2.3.0, 2.0.0.rc) rspec-mocks (2.3.0, 2.0.0.rc) rspec-rails (2.3.1, 2.0.0.rc, 1.2.9) ruby_parser (2.0.4) rubyforge (2.0.3) rubygems-update (1.3.6, 1.3.5) rvm (1.0.13) s4t-utils (1.0.4) safariwatir (0.3.7) sexp_processor (3.0.3) spork (0.7.3) sqlite3-ruby (1.3.1, 1.2.5) sys-uname (0.8.5) term-ansicolor (1.0.4) text-format (1.0.0) text-hyphen (1.0.0) thor (0.14.6, 0.14.3, 0.12.0) treetop (1.4.8, 1.4.2) tzinfo (0.3.23) user-choices (1.1.6) vlad (2.0.0) vlad-git (2.1.0) webrat (0.7.1, 0.6.0, 0.5.3) xml-simple (1.0.12) ZenTest (4.4.2) I am using ruby 1.9.2 and rails 3.0.3 installed using RVM on OSX 10.6 Snow Leopard. I just want to be able to run my specs like I used to. As a separate issue, autotest yields an error about an include for autotest/growl but I installed autotest-growl. Maybe this is a gem issue? I tried doing the same things and get the same error when it comes to using my ubuntu 10.04 server machine though. Gemfile source 'http://rubygems.org' gem 'rails', '3.0.3' # Bundle edge Rails instead: # gem 'rails', :git => 'git://github.com/rails/rails.git' gem 'sqlite3-ruby', :require => 'sqlite3' group :couch do gem 'couchrest' end group :user_auth do gem 'authlogic' gem "rails3-generators" gem 'facebooker' end group :markup do gem 'haml' gem 'sass' end group :testing do gem 'rspec-rails' gem 'rspec' gem 'webrat' gem 'cucumber' gem 'capybara' gem 'factory_girl' gem 'shoulda' gem 'autotest' end group :server do gem 'unicorn' end # Use unicorn as the web server # gem 'unicorn' # Deploy with Capistrano # gem 'capistrano' # To use debugger # gem 'ruby-debug' # Bundle the extra gems: # gem 'bj' # gem 'nokogiri' # gem 'sqlite3-ruby', :require => 'sqlite3' # gem 'aws-s3', :require => 'aws/s3' # Bundle gems for the local environment. Make sure to # put test-only gems in this group so their generators # and rake tasks are available in development mode: # group :development, :test do # gem 'webrat' # end Gemfile.lock GEM remote: http://rubygems.org/ specs: ZenTest (4.4.2) abstract (1.0.0) actionmailer (3.0.3) actionpack (= 3.0.3) mail (~> 2.2.9) actionpack (3.0.3) activemodel (= 3.0.3) activesupport (= 3.0.3) builder (~> 2.1.2) erubis (~> 2.6.6) i18n (~> 0.4) rack (~> 1.2.1) rack-mount (~> 0.6.13) rack-test (~> 0.5.6) tzinfo (~> 0.3.23) activemodel (3.0.3) activesupport (= 3.0.3) builder (~> 2.1.2) i18n (~> 0.4) activerecord (3.0.3) activemodel (= 3.0.3) activesupport (= 3.0.3) arel (~> 2.0.2) tzinfo (~> 0.3.23) activeresource (3.0.3) activemodel (= 3.0.3) activesupport (= 3.0.3) activesupport (3.0.3) arel (2.0.6) authlogic (2.1.6) activesupport autotest (4.4.6) ZenTest (>= 4.4.1) builder (2.1.2) capybara (0.4.0) celerity (>= 0.7.9) culerity (>= 0.2.4) mime-types (>= 1.16) nokogiri (>= 1.3.3) rack (>= 1.0.0) rack-test (>= 0.5.4) selenium-webdriver (>= 0.0.27) xpath (~> 0.1.2) celerity (0.8.6) childprocess (0.1.6) ffi (~> 0.6.3) couchrest (1.0.1) json (>= 1.4.6) mime-types (>= 1.15) rest-client (>= 1.5.1) cucumber (0.10.0) builder (>= 2.1.2) diff-lcs (~> 1.1.2) gherkin (~> 2.3.2) json (~> 1.4.6) term-ansicolor (~> 1.0.5) culerity (0.2.13) diff-lcs (1.1.2) erubis (2.6.6) abstract (>= 1.0.0) facebooker (1.0.75) json_pure (>= 1.0.0) factory_girl (1.3.2) ffi (0.6.3) rake (>= 0.8.7) gherkin (2.3.2) json (~> 1.4.6) term-ansicolor (~> 1.0.5) haml (3.0.25) i18n (0.5.0) json (1.4.6) json_pure (1.4.6) kgio (2.0.0) mail (2.2.13) activesupport (>= 2.3.6) i18n (>= 0.4.0) mime-types (~> 1.16) treetop (~> 1.4.8) mime-types (1.16) nokogiri (1.4.4) polyglot (0.3.1) rack (1.2.1) rack-mount (0.6.13) rack (>= 1.0.0) rack-test (0.5.6) rack (>= 1.0) rails (3.0.3) actionmailer (= 3.0.3) actionpack (= 3.0.3) activerecord (= 3.0.3) activeresource (= 3.0.3) activesupport (= 3.0.3) bundler (~> 1.0) railties (= 3.0.3) rails3-generators (0.17.0) railties (>= 3.0.0) railties (3.0.3) actionpack (= 3.0.3) activesupport (= 3.0.3) rake (>= 0.8.7) thor (~> 0.14.4) rake (0.8.7) rest-client (1.6.1) mime-types (>= 1.16) rspec (2.3.0) rspec-core (~> 2.3.0) rspec-expectations (~> 2.3.0) rspec-mocks (~> 2.3.0) rspec-core (2.3.1) rspec-expectations (2.3.0) diff-lcs (~> 1.1.2) rspec-mocks (2.3.0) rspec-rails (2.3.1) actionpack (~> 3.0) activesupport (~> 3.0) railties (~> 3.0) rspec (~> 2.3.0) rubyzip (0.9.4) sass (3.1.0.alpha.206) selenium-webdriver (0.1.2) childprocess (~> 0.1.5) ffi (~> 0.6.3) json_pure rubyzip shoulda (2.11.3) sqlite3-ruby (1.3.2) term-ansicolor (1.0.5) thor (0.14.6) treetop (1.4.9) polyglot (>= 0.3.1) tzinfo (0.3.23) unicorn (3.1.0) kgio (~> 2.0.0) rack webrat (0.7.2) nokogiri (>= 1.2.0) rack (>= 1.0) rack-test (>= 0.5.3) xpath (0.1.2) nokogiri (~> 1.3) PLATFORMS ruby DEPENDENCIES authlogic autotest capybara couchrest cucumber facebooker factory_girl haml rails (= 3.0.3) rails3-generators rspec rspec-rails sass shoulda sqlite3-ruby unicorn webrat

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  • 'NoneType' object has no attribute 'get' error using SQLAlchemy

    - by Az
    I've been trying to map an object to a database using SQLAlchemy but have run into a snag. Version info if handy: [OS: Mac OSX 10.5.8 | Python: 2.6.4 | SQLAlchemy: 0.5.8] The class I'm going to map: class Student(object): def __init__(self, name, id): self.id = id self.name = name self.preferences = collections.defaultdict(set) self.allocated_project = None self.allocated_rank = 0 def __repr__(self): return str(self) def __str__(self): return "%s %s" %(self.id, self.name) Background: Now, I've got a function that reads in the necessary information from a text database into these objects. The function more or less works and I can easily access the information from the objects. Before the SQLAlchemy code runs, the function will read in the necessary info and store it into the Class. There is a dictionary called students which stores this as such: students = {} students[id] = Student(<all the info from the various "reader" functions>) Afterwards, there is an "allocation" algorithm that will allocate projects to student. It does that well enough. The allocated_project remains as None if a student is unsuccessful in getting a project. SQLAlchemy bit: So after all this happens, I'd like to map my object to a database table. Using the documentation, I've used the following code to only map certain bits. I also begin to create a Session. from sqlalchemy import * from sqlalchemy.orm import * engine = create_engine('sqlite:///:memory:', echo=False) metadata = MetaData() students_table = Table('studs', metadata, Column('id', Integer, primary_key=True), Column('name', String) ) metadata.create_all(engine) mapper(Student, students_table) Session = sessionmaker(bind=engine) sesh = Session() Now after that, I was curious to see if I could print out all the students from my students dictionary. for student in students.itervalues(): print student What do I get but an error: Traceback (most recent call last): File "~/FYP_Tests/FYP_Tests.py", line 140, in <module> print student File "/~FYP_Tests/Parties.py", line 30, in __str__ return "%s %s" %(self.id, self.name) File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/SQLAlchemy-0.5.8-py2.6.egg/sqlalchemy/orm/attributes.py", line 158, in __get__ return self.impl.get(instance_state(instance), instance_dict(instance)) AttributeError: 'NoneType' object has no attribute 'get' I'm at a loss as to how to resolve this issue, if it is an issue. If more information is required, please ask and I will provide it.

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  • Multiple skins in ASP.NET MVC using StringTemplate

    - by Jamie
    I am considering the StringTemplate view engine for my ASP.NET MVC application. This application will be built with one skin, but I then expect many more, often very similar skins to be developed for it. This is primiarly the reason for my choice of StringTemplate as the view engine, as there will be zero logic in the views. In my head, I envisaged having each skin in a directory under the 'Views' directory in the folder structure, then maintaining a data structure which maps hostnames to skin directories. An obvious disadvantage of this approach is that I will have to explicitly specify my view files - an alternative might be to hack the implementation of the View() method to change the /views/controller/action standard path and insert an extra layer. Is anyone aware of any examples of implementations along these lines using ASP.NET MVC and StringTemplate at present? Can anyone forsee any potential problems with my approach? Thanks in advance.

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  • Object Oriented Design Questions

    - by Robert
    Hello there. I am going to develop a Tic-Tac-Toe game using Java(or maybe other OO Languages).Now I have a picture in my mind about the general design. Interface: Player ,then I will be able to implement a couple of Player classes,based on how I want the opponent to be,for example,random player,intelligent player. Classes: Board class,with a two-dimensional array of integers,0 indicates open,1 indicates me,-1 indicates opponent.The evaluation function will be in here as well,to return the next best move based on the current board arrangement and whose turn it is. Refree class,which will create instance of the Board and two player instances,then get the game begin. This is a rough idea of my OO design,could anybody give me any critiques please,I find this is really beneficial,thank you very much.

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  • From actionscript to google's datastore through java.

    - by Jonathan
    I'm working on a flash game written in pure actionscript 3.0 in Flex. I've just finished implementing replays for the game, but want to store the top 10 hiscores' replay data on my google-app-engine'd website. I'm using Java for the app-engine stuff in Eclipse in java but I have no idea how to deal with communicating to my java code from my actionscript code. I'll need to both read and write from actionscript - java - datastore. Does anyone have any experience with this? For note, I'm horribly noob with anything to do with web development. I hear you can pass arguments to a URL when calling it, comparable to command-line arguments on a desktop executable and if so then sending all the data as a large string would be doable... The question then would be how to call a url from AS3 code with additional data and then how to catch that on the java side. Thanks to anyone who can help. Jono

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  • GameKit and GKPeerPicker on 1st Gen iPhone and iPod Touch

    - by Reese McLean
    This is my current set up for my multiplayer game: A view that gives connection tips and warns the user that multiplayer will not work on the 1st Gen iPhone or ipod Touch. There is a "connect" button that pushes the game view and starts the GKPeerPicker. Unfortunately, I don't have a 1st Gen iPhone or iPod Touch to test what happens if they press the connect button. The view will be pushed, but I don't know what will happen when the PeerPicker tries to show. So the Question(s): Is there anyway to tell if the user will not be able to use GameKit so that I can disable the "connect" button? What will happen if they do press the connect button and GameKit is not available?

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  • NVelocity ASP.NET Examples

    - by Ben
    I'm looking to use NVelocity in my ASP.NET MVC application, not as a view engine, just for rendering some email templates. However, I cannot for the life of me get it to work. I have downloaded it from the castle project and followed the example at http://www.castleproject.org/others/nvelocity/usingit.html#step1 No matter what I try I don't seem to be able to load a template located in my site. The example suggests using the absolute path, which I have tried to no avail: Template t = engine.GetTemplate("/Templates/TestEmail.vm"); So please can someone give me two examples. One of loading a template located in the web site directory and secondly one parsing a string variable (as it is likely that my templates will be stored in a database). Many thanks Ben

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  • Making the domain-model of tic tac toe

    - by devoured elysium
    I am trying to make the domain model of a Tic Tac Toe game. I'll try then to go on through the various steps of the Unified Process and later implement it in some language (C# or Java). I'd like to have some feedback if I'm going on the right path: I've defined the game with two actors, Player O and Player X. I'm not sure about defining both a Tile and a Tile State. Maybe I should only define a Tile and have the 3 possible states specialize from it? I'm not sure what is best: to have both Player O and Player X be associations with Tic Tac Toe or have them inherit from Player that is associated with Tic Tac Toe. Following the design shown on the pic, in theory we could have a Tic Tac Toe concept with 2 Player O's, which wouldn't be correct. What is your opinion on this? Also, am I missing something in the diagram? Although I can't see any other actors for Tic Tac Toe, should I have any other? Thanks

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  • Entrepreneur Needs Programmers, Architects, or Engineers?

    - by brand-newbie
    Hi guys (Ladies included). I posted on a related site, but THIS is the place to be. I want to build a specialized website. I am an entrepreneur and refining valuations now for venture capitalsists: i.e., determining how much cash I will need. I need help in understanding what human resources I need (i.e., Software Programmers, Architects, Engineers, etc.)??? Trust me, I have read most--if not all--of the threads here on the subject, and I can tell you I am no closer to the answer than ever. Here's my technology problem: The website will include (2) main components: a search engine (web crawler)...and a very large database. The search engine will not be a competitor to google, obviously; however, it "will" require bots to scour the web. The website will be, basically, a statistical database....where users should be able to pull up any statistic from "numerous" fields. Like any entrepreneur with a web-based vision, I'm "hoping" to get 100+ million registered users eventually. However, practically, we will start as small as feasible. As regards the technology (database architecture, servers, etc.), I do want quality, quality, quality. My priorities are speed, and the capaility to be scalable...so that if I "did" get globally large, we could do it without having to re-engineer anything. In other words, I want the back-end and the "infrastructure" to be scalable and professional....with emphasis on quality. I am not an IT professional. Although I've built several Joomla-based websites, I'm just a rookie who's only used minor javascript coding to modify a few plug-ins and components. The business I'm trying to create requires specialization and experts. I want to define the problem and let a capable team create the final product, and I will stay totally hands off. So who do you guys suggest I hire to run this thing? A software engineer? I was thinking I would need a "database engineer," a "systems security engineer", and maybe 2 or 3 "programmers" for the search engine. Also a web designer...and maybe a part-time graphic designer...everyone working under a single software engineer. What do you guys think? Who should I hire?...I REALLY need help from some people in the industry (YOU guys) on this. Is this project do-able in 6 months? If so, how many people will I need? Who exactly needs to head up this thing?...Senior software engineer, an embedded engineer, a CC++ engineer, a java engineer, a database engineer? And do I build this thing is Ruby or Java?

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  • CherryPy sessions for same domain, different port

    - by detly
    Consider the script below. It will launch two subprocesses, each one a CherryPy app (hit Ctrl+C or whatever the KeyboardInterrupt combo is on your system to end them both). If you run it with CP 3.0 (taking care to change the 3.0/3.1 specific lines in "StartServer"), then visit: http://localhost:15002/ ...you see an empty dict. Then visit: http://localhost:15002/set?val=10 http://localhost:15002/ ...and you see the newly populated dict. Then visit: http://localhost:15012/ ...and go back to http://localhost:15002/ ...and nothing has changed. If you try the same thing with CP 3.1 (remember the lines in "StartServer"!), when you get to the last step, the dict is now empty. This happens in Windows and Debian, Python 2.5 and 2.6. You can try all sorts of things: changing to file storage, separating the storage paths... the only difference it makes is that the sessions might get merged instead of erased. I've read another post about this as well, and there's a suggestion there to put the session tools config keys in the app config rather than the global config, but I don't think that's relevant to this usage where the apps run independently. What do I do to get independent CherryPy applications to NOT interfere with each other? Note: I originally asked this on the CherryPy mailing list but haven't had a response yet so I'm trying here. I hope that's okay. import os, os.path, socket, sys import subprocess import cgi import cherrypy HTTP_PORT = 15002 HTTP_HOST = "127.0.0.1" site1conf = { 'global' : { 'server.socket_host' : HTTP_HOST, 'server.socket_port' : HTTP_PORT, 'tools.sessions.on' : True, # 'tools.sessions.storage_type': 'file', # 'tools.sessions.storage_path': '1', # 'tools.sessions.storage_path': '.', 'tools.sessions.timeout' : 1440}} site2conf = { 'global' : { 'server.socket_host' : HTTP_HOST, 'server.socket_port' : HTTP_PORT + 10, 'tools.sessions.on' : True, # 'tools.sessions.storage_type': 'file', # 'tools.sessions.storage_path': '2', # 'tools.sessions.storage_path': '.', 'tools.sessions.timeout' : 1440}} class Home(object) : def __init__(self, key): self.key = key @cherrypy.expose def index(self): return """\ <html> <body>Session: <br>%s </body> </html> """ % cgi.escape(str(dict(cherrypy.session))) @cherrypy.expose def set(self, val): cherrypy.session[self.key.upper()] = val return """\ <html> <body>Set %s to %s</body> </html>""" % (cgi.escape(self.key), cgi.escape(val)) def StartServer(conf, key): cherrypy.config.update(conf) print 'Starting server (%s)' % key cherrypy.tree.mount(Home(key), '/', {}) # Start the web server. #### 3.0 # cherrypy.server.quickstart() # cherrypy.engine.start() #### #### 3.1 cherrypy.engine.start() cherrypy.engine.block() #### def Main(): # Start first webserver proc1 = subprocess.Popen( [sys.executable, os.path.abspath(__file__), "1"]) proc2 = subprocess.Popen( [sys.executable, os.path.abspath(__file__), "2"]) proc1.wait() proc2.wait() if __name__ == "__main__": print sys.argv if len(sys.argv) == 1: # Master process Main() elif(int(sys.argv[1]) == 1): StartServer(site1conf, 'magic') elif(int(sys.argv[1]) == 2): StartServer(site2conf, 'science') else: sys.exit(1)

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  • Parsing SGF files in C#

    - by mafutrct
    The text-based Smart Game Format has become the sole file format for exchanging Go game records by now. I stared with disbelieve that there are almost no parsers available. Google yielded a few results in antique Java and Python, but no modern implementations. I am curious if I have to write my own parser. Do you know of a modern implementation in C# or Java? In case there really are no parsers available, how should I implement one? Are there general guidelines or tools (in a C# environment) I should know of? This is an example file: (;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[6.50] PW[White]PB[Black] ;B[pd] ;W[dc] ;B[dq] ;W[pp] ;B[ce] (;W[ed] ;B[ci] ;W[kc]) (;W[do] ;B[dl] ;W[gp] ;B[eo] ;W[en] ;B[fo]))

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  • What AMF Servers Support Remote Shared Objects?

    - by GrayB
    Greetings. I'm planning on building a Flex based multiplayer game, and I'm researching what will be required for the server end. I have PHP experience, so I started looking at ZendAMF. Now in this game, I'll need the concept of rooms, and real time updates to clients in those rooms, so it looks like I'll be using remote shared objects (correct, yes?). I'm not seeing where ZendAMF can support this. So I found this page: http://arunbluebrain.wordpress.com/2009/03/04/flex-frameworks-httpcorlanorg/ It seems to indicate that ZendAMF isn't going to do what I want. WebORB for PHP seems to be the only PHP based solution that does messaging, but on that page it doesn't mention "real-time" next to it like the Java based ones below it do. What should I be looking at for the server piece with my requirements? Do I need to make the jump to something like BlazeDS and try to pick up a bit of Java knowledge? Thanks.

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  • Please help me decide how to figure out XNA's ContentPipeline

    - by DDTmanSP
    I have read this link : http://msdn.microsoft.com/en-us/library/bb464156.aspx They said : "... the XNA Framework Redistributable file does not contain the Content Pipeline Build Runtime. Building content at run time is supported only when XNA Game Studio has been installed on the Windows-based development computer." Actually, before I know of that, I have already used a lot of content pipeline to help me read out my game's assets. And because of that, I am now very headache to confront the publish's problem "The application requires that the assemblies Microsoft.Xna.Framework.Content.Pipeline 3.1.0.0 be installed ....." So I would like to find some ways that can help me solve this without convertion of my pipelines. So that I don't need to rewrite it all in new classes that manually load assets for me. Regard, DDTmanSP

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  • How to Increment Visual Studio build number using C++?

    - by Brock Woolf
    I have a Visual Studio 2008 project that produces a file called: "Game-Release.exe". This was configured under Project Properties - C/C++ - Linker - General: $(OutDir)\$(ProjectName)-Release.exe I would like to take this a bit further by have an incrementing build number so I would have something which says: Game-Release-Build-1002.exe The number on the end should be an incrementing integer. I will be storing the build exe's on subversion so I think i would find this useful (although not necessary). Perhaps there is a built in macro in Visual Studio that could handle this. Quite possibly I was thinking I could have a text file with the build number in it and have the compiler read, use and increment the number in the file each time the project is built. My goal is however to make the process as automated as possible. What is the best way to accomplish this? If you offer an opinion, please also provide the code we can all share. Thnx.

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  • unable to record tests in Jmeter, here is the log file. Can somebody tell me the solution

    - by mrinalini
    2010/06/07 17:36:24 INFO - jmeter.util.JMeterUtils: Setting Locale to en_US 2010/06/07 17:36:25 INFO - jmeter.JMeter: Loading user properties from: E:\mrinalini\jakarta-jmeter-2.3.4\bin\user.properties 2010/06/07 17:36:25 INFO - jmeter.JMeter: Loading system properties from: E:\mrinalini\jakarta-jmeter-2.3.4\bin\system.properties 2010/06/07 17:36:25 INFO - jmeter.JMeter: Copyright (c) 1998-2009 The Apache Software Foundation 2010/06/07 17:36:25 INFO - jmeter.JMeter: Version 2.3.4 r785646 2010/06/07 17:36:25 INFO - jmeter.JMeter: java.version=1.6.0_16 2010/06/07 17:36:25 INFO - jmeter.JMeter: java.vm.name=Java HotSpot(TM) Client VM 2010/06/07 17:36:25 INFO - jmeter.JMeter: os.name=Windows XP 2010/06/07 17:36:25 INFO - jmeter.JMeter: os.arch=x86 2010/06/07 17:36:25 INFO - jmeter.JMeter: os.version=5.1 2010/06/07 17:36:25 INFO - jmeter.JMeter: file.encoding=Cp1252 2010/06/07 17:36:25 INFO - jmeter.JMeter: Default Locale=English (United States) 2010/06/07 17:36:25 INFO - jmeter.JMeter: JMeter Locale=English (United States) 2010/06/07 17:36:25 INFO - jmeter.JMeter: JMeterHome=E:\mrinalini\jakarta-jmeter-2.3.4 2010/06/07 17:36:25 INFO - jmeter.JMeter: user.dir =E:\mrinalini\jakarta-jmeter-2.3.4\bin 2010/06/07 17:36:25 INFO - jmeter.JMeter: PWD =E:\mrinalini\jakarta-jmeter-2.3.4\bin 2010/06/07 17:36:25 INFO - jmeter.JMeter: IP: 10.254.1.127 Name: cura-dws-06 FullName: cura-dws-06.curasoftware.co.in 2010/06/07 17:36:25 INFO - jmeter.JMeter: Loaded icon properties from org/apache/jmeter/images/icon.properties 2010/06/07 17:36:26 INFO - jmeter.engine.util.CompoundVariable: Note: Function class names must contain the string: '.functions.' 2010/06/07 17:36:26 INFO - jmeter.engine.util.CompoundVariable: Note: Function class names must not contain the string: '.gui.' 2010/06/07 17:36:26 INFO - jmeter.util.BSFTestElement: Registering JMeter version of JavaScript engine as work-round for BSF-22 2010/06/07 17:36:26 INFO - jmeter.protocol.http.sampler.HTTPSamplerBase: Cannot find .className property for htmlParser, using default 2010/06/07 17:36:26 INFO - jmeter.protocol.http.sampler.HTTPSamplerBase: Parser for text/html is 2010/06/07 17:36:26 INFO - jmeter.protocol.http.sampler.HTTPSamplerBase: Parser for application/xhtml+xml is 2010/06/07 17:36:26 INFO - jmeter.protocol.http.sampler.HTTPSamplerBase: Parser for application/xml is 2010/06/07 17:36:26 INFO - jmeter.protocol.http.sampler.HTTPSamplerBase: Parser for text/xml is 2010/06/07 17:36:26 INFO - jmeter.protocol.http.sampler.HTTPSamplerBase: Parser for text/vnd.wap.wml is org.apache.jmeter.protocol.http.parser.RegexpHTMLParser 2010/06/07 17:36:27 INFO - jmeter.gui.util.MenuFactory: Skipping org.apache.jmeter.protocol.http.modifier.gui.ParamModifierGui 2010/06/07 17:36:27 INFO - jmeter.gui.util.MenuFactory: Skipping org.apache.jmeter.protocol.http.modifier.gui.UserParameterModifierGui 2010/06/07 17:36:27 INFO - jmeter.protocol.http.sampler.HTTPSampler: Maximum connection retries = 10 2010/06/07 17:36:27 INFO - jmeter.protocol.http.sampler.HTTPSampler: Connection and read timeouts are available on this JVM 2010/06/07 17:36:27 WARN - jmeter.gui.util.MenuFactory: Missing jar? Could not create org.apache.jmeter.visualizers.MailerVisualizer. java.lang.NoClassDefFoundError: javax/mail/MessagingException 2010/06/07 17:36:27 INFO - jmeter.samplers.SampleResult: Note: Sample TimeStamps are START times 2010/06/07 17:36:27 INFO - jmeter.samplers.SampleResult: sampleresult.default.encoding is set to ISO-8859-1 2010/06/07 17:36:38 INFO - jmeter.services.FileServer: Default base=E:\mrinalini\jakarta-jmeter-2.3.4\bin 2010/06/07 17:36:38 INFO - jmeter.services.FileServer: Set new base=E:\mrinalini\jakarta-jmeter-2.3.4\bin 2010/06/07 17:36:38 INFO - jmeter.save.SaveService: Testplan (JMX) version: 2.2. Testlog (JTL) version: 2.2 2010/06/07 17:36:38 INFO - jmeter.save.SaveService: Using SaveService properties file encoding UTF-8 2010/06/07 17:36:38 INFO - jmeter.save.SaveService: Using SaveService properties file version 697317 2010/06/07 17:36:38 INFO - jmeter.save.SaveService: Using SaveService properties version 2.1 2010/06/07 17:36:38 INFO - jmeter.save.SaveService: All converter versions present and correct 2010/06/07 17:36:41 INFO - jmeter.protocol.http.proxy.Proxy: Proxy will remove the headers: If-Modified-Since,If-None-Match,Host 2010/06/07 17:36:41 INFO - jmeter.protocol.http.proxy.Daemon: Creating Daemon Socket on port: 8080 2010/06/07 17:36:41 INFO - jmeter.protocol.http.proxy.Daemon: Proxy up and running! 2010/06/07 17:37:55 INFO - jmeter.protocol.http.proxy.Daemon: Proxy Server stopped

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  • Another design-related C++ question

    - by Kotti
    Hi! I am trying to find some optimal solutions in C++ coding patterns, and this is one of my game engine - related questions. Take a look at the game object declaration (I removed almost everything, that has no connection with the question). // Abstract representation of a game object class Object : public Entity, IRenderable, ISerializable { // Object parameters // Other not really important stuff public: // @note Rendering template will never change while // the object 'lives' Object(RenderTemplate& render_template, /* params */) : /*...*/ { } private: // Object rendering template RenderTemplate render_template; public: /** * Default object render method * Draws rendering template data at (X, Y) with (Width, Height) dimensions * * @note If no appropriate rendering method overload is specified * for any derived class, this method is called * * @param Backend & b * @return void * @see */ virtual void Render(Backend& backend) const { // Render sprite from object's // rendering template structure backend.RenderFromTemplate( render_template, x, y, width, height ); } }; Here is also the IRenderable interface declaration: // Objects that can be rendered interface IRenderable { /** * Abstract method to render current object * * @param Backend & b * @return void * @see */ virtual void Render(Backend& b) const = 0; } and a sample of a real object that is derived from Object (with severe simplifications :) // Ball object class Ball : public Object { // Ball params public: virtual void Render(Backend& b) const { b.RenderEllipse(/*params*/); } }; What I wanted to get is the ability to have some sort of standard function, that would draw sprite for an object (this is Object::Render) if there is no appropriate overload. So, one can have objects without Render(...) method, and if you try to render them, this default sprite-rendering stuff is invoked. And, one can have specialized objects, that define their own way of being rendered. I think, this way of doing things is quite good, but what I can't figure out - is there any way to split the objects' "normal" methods (like Resize(...) or Rotate(...)) implementation from their rendering implementation? Because if everything is done the way described earlier, a common .cpp file, that implements any type of object would generally mix the Resize(...), etc methods implementation and this virtual Render(...) method and this seems to be a mess. I actually want to have rendering procedures for the objects in one place and their "logic implementation" - in another. Is there a way this can be done (maybe alternative pattern or trick or hint) or this is where all this polymorphic and virtual stuff sucks in terms of code placement?

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  • CCSprite following a sequence of CGPoints

    - by pgb
    I'm developing a line drawing game, similar to Flight Control, Harbor Master, and others in the appstore, using Cocos2D. For this game, I need a CCSprite to follow a line that the user has drawn. I'm storing a sequence of CGPoint structs in an NSArray, based on the points I get in the touchesBegin and touchesMoved messages. I now have the problem of how to make my sprite follow them. I have a tick method, that is called at the framerate speed. In that tick method, based on the speed and current position of the sprite, I need to calculate its next position. Is there any standard way to achieve this? My current approach is calculate the line between the last "reference point" and the next one, and calculate the next point in that line. The problem I have is when the sprite "turns" (moves from one segment of the line to another). Any hint will be greatly appreciated.

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  • iPhone: Switching from a map screen to a battle screen without the map progress being reset

    - by user298261
    Hello! I'm trying to make a role-playing game, and I want the game to work so that it transitions to the battle NIB for battles, then returns back to the map NIB afterward, yet still retain all the progress the player has made exploring the dungeon. I've tried proto-typing this with just a view-switcher, where one view creates content, and then switches to the other view, and then coming back from the other view. However, once the view goes back to the original, the original view is reset. How to make the data persistent so that it doesn't reset after every "battle"? Thanks!

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  • Simple way to implement computer-go board in Java

    - by codingbear
    I want to make a simple Go board to design an Computer Go game. In a go game, you lie a "stone" (white or black) on a position where horizontal and vertical lines intersect. What are some simple ways to restrict users from placing their stones in other locations? Maybe I'm just not seeing a simple solution. EDIT I guess I should rephrase my question better: I want to know how to do the background image of Go board, so that I can lie my stones on the intersection of the horizontal and the vertical lines. I was thinking about getting a just regular Go board image, and when I'm actually rendering stones, I find right position of pixels to lie stones. However, that solution did not seem to be the best solution, since I need to worry about size of stone images and think about proportionality when I either expand or shrink the board window.

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  • How to Connect Crystal Reports to MySQL directly by C# code without DSN or a DataSet

    - by Yanko Hernández Alvarez
    How can I connect a Crystal Report (VS 2008 basic) to a MySQL DB without using a DSN or a preload DataSet using C#? I need install the program on several places, so I must change the connection parameters. I don't want to create a DSN on every place, nor do I want to preload a DataSet and pass it to the report engine. I use nhibernate to access the database, so to create and fill the additional DS would take twice the work and additional maintenance later. I think the best option would be to let the crystal reports engine to connect to MySQL server by itself using ODBC. I managed to create the connection in the report designer (VS2008) using the Database Expert, creating an ODBC(RDO) connection and entering this connection string "DRIVER={MySQL ODBC 5.1 Driver};SERVER=myserver.mydomain" and in the "Next" page filling the "User ID", "Password" and "Database" parameters. I didn't fill the "Server" parameter. It worked. As a matter of fact, if you use the former connection string, it doesn't matter what you put on the "Server" parameter, it seems the parameter is unused. On the other hand, if you use "DRIVER={MySQL ODBC 5.1 Driver}" as a connection string and later fill the "Server" parameter with the FQDN of the server, the connection doesn't work. How can I do that by code? All the examples I've seen till now, use a DSN or the DataSet method. I saw the same question posted but for PostgreSQL and tried to adapt it to mysql, but so far, no success. The first method: Rp.Load(); Rp.DataSourceConnections[0].SetConnection("DRIVER={MySQL ODBC 5.1 Driver};SERVER=myserver.mydomain", "database", "user", "pass"); Rp.ExportToDisk(ExportFormatType.PortableDocFormat, "report.pdf"); raise an CrystalDecisions.CrystalReports.Engine.LogOnException during ExportToDisk Message="Logon failed.\nDetails: IM002:[Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified.\rError in File temporal file path.rpt:\nUnable to connect: incorrect log on parameters. the InnerException is an System.Runtime.InteropServices.COMException with the same message and no InnerException The "no default driver specified" makes me wonder if the server parameter is unused here too (see above). In that case: How can I specify the connection string? I haven't tried the second method because it doesn't apply. Does anybody know the solution?

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  • Finding minimum cut-sets between bounded subgraphs

    - by Tore
    If a game map is partitioned into subgraphs, how to minimize edges between subgraphs? I have a problem, Im trying to make A* searches through a grid based game like pacman or sokoban, but i need to find "enclosures". What do i mean by enclosures? subgraphs with as few cut edges as possible given a maximum size and minimum size for number of vertices for each subgraph that act as a soft constraints. Alternatively you could say i am looking to find bridges between subgraphs, but its generally the same problem. Given a game that looks like this, what i want to do is find enclosures so that i can properly find entrances to them and thus get a good heuristic for reaching vertices inside these enclosures. So what i want is to find these colored regions on any given map. My Motivation The reason for me bothering to do this and not just staying content with the performance of a simple manhattan distance heuristic is that an enclosure heuristic can give more optimal results and i would not have to actually do the A* to get some proper distance calculations and also for later adding competitive blocking of opponents within these enclosures when playing sokoban type games. Also the enclosure heuristic can be used for a minimax approach to finding goal vertices more properly. A possible solution to the problem is the Kernighan-Lin algorithm: function Kernighan-Lin(G(V,E)): determine a balanced initial partition of the nodes into sets A and B do A1 := A; B1 := B compute D values for all a in A1 and b in B1 for (i := 1 to |V|/2) find a[i] from A1 and b[i] from B1, such that g[i] = D[a[i]] + D[b[i]] - 2*c[a][b] is maximal move a[i] to B1 and b[i] to A1 remove a[i] and b[i] from further consideration in this pass update D values for the elements of A1 = A1 / a[i] and B1 = B1 / b[i] end for find k which maximizes g_max, the sum of g[1],...,g[k] if (g_max > 0) then Exchange a[1],a[2],...,a[k] with b[1],b[2],...,b[k] until (g_max <= 0) return G(V,E) My problem with this algorithm is its runtime at O(n^2 * lg(n)), i am thinking of limiting the nodes in A1 and B1 to the border of each subgraph to reduce the amount of work done. I also dont understand the c[a][b] cost in the algorithm, if a and b do not have an edge between them is the cost assumed to be 0 or infinity, or should i create an edge based on some heuristic. Do you know what c[a][b] is supposed to be when there is no edge between a and b? Do you think my problem is suitable to use a multi level problem? Why or why not? Do you have a good idea for how to reduce the work done with the kernighan-lin algorithm for my problem?

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