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• What is the proper way to specify a path to 'app' in a Rails plugin?

  - by Brian Deterling

  This question came about because the cells gem specifies template directories using File.join('app','cells'). That works fine until you run Rails as a daemon (scripts/server -d). The daemon switches directories to / which leaves the cells template paths pointing to the wrong absolute path. My solution was to set the default paths to File.join(RAILS_ROOT, 'app', 'cells'). This works in Rails, but the unit tests for the plugin fail because RAILS_ROOT isn't defined. Using File.join(File.dirname(__FILE__),'..' ... also works but requires about 6 levels of '..' which seems wrong. So my question is what is the proper way to specify the path to a directory under 'app' in a Rails plugin? Or is there something else wrong that would cause daemonizing Rails to fail to find the relative paths?

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• How to call the __del__ method?

  - by Verrtex

  I am reading a code. There is a class in which __del__ method is defined. I figured out that this method is used to destroy an instance of the class. However, I cannot find a place where this method is used. The main reason for that is that I do not know how this method is used, probably not like that: obj1.del(). So, my questions is how to call the __del__ method? Thank you for any help.

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• multiple ftp sites on a single iis server with one ip

  - by kacalapy

  can i have multiple iis ftp sites using something similar to web site's unasigned host headers? i have a dedicated server in a hosting facility and want to make a web site for each of my clients. to add/ remove files and content i want ftp access to each of the sites root folders. lets say i have 10 sites set up using unasigned host headers... how can i set up 10 analogous ftp sites on the same server? AND NOT USE A DEFINED IP ADDRESS FOR EACH FTP SITE thanks all

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• My PowerShell functions do not appear to be registered

  - by Frank

  Hi there, I have a script saved in a ps1 file in which I define 2 functions as such: function Invoke-Sql([string]$query) { Invoke-Sqlcmd -ServerInstance $Server -Database $DB -User $User -Password $Password -Query $query } function Get-Queued { Invoke-Sql "Select * From Comment where AwaitsModeration = 1" } In the PowerShell console I then call the ps1 file by typing it in (it's in a folder in the path, and autocompletion works) However, I cannot start using the functions. I am confused, because when I copy / paste the functions into the console, all is fine and they work. I also have a function defined in my profile, and it works. Where am I thinking wrong, why doesn't it work what I'm trying to do?

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• Authorization in a more purely OOP style...

  - by noblethrasher

  I've never seen this done but I had an idea of doing authorization in a more purely OO way. For each method that requires authorization we associate a delegate. During initialization of the class we wire up the delegates so that they point to the appropriate method (based on the user's rights). For example: class User { private deleteMemberDelegate deleteMember; public StatusMessage DeleteMember(Member member) { if(deleteMember != null) { deleteMember(member); } } //other methods defined similarly... User(string name, string password) //cstor. { //wire up delegates based on user's rights. //Thus we handle authentication and authorization in the same method. } } This way the client code never has to explictly check whether or not a user is in a role, it just calls the method. Of course each method should return a status message so that we know if and why it failed. Thoughts?

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• Django: Geocoding an address on form submission?

  - by User

  Trying to wrap my head around django forms and the django way of doing things. I want to create a basic web form that allows a user to input an address and have that address geocoded and saved to a database. I created a Location model: class Location(models.Model): address = models.CharField(max_length=200) city = models.CharField(max_length=100) state = models.CharField(max_length=100, null=True) postal_code = models.CharField(max_length=100, null=True) country = models.CharField(max_length=100) latitude = models.DecimalField(max_digits=18, decimal_places=10, null=True) longitude = models.DecimalField(max_digits=18, decimal_places=10, null=True) And defined a form: class LocationForm(forms.ModelForm): class Meta: model = models.Location exclude = ('latitude','longitude') In my view I'm using form.save() to save the form. This works and saves an address to the database. I created a module to geocode an address. I'm not sure what the django way of doing things is, but I guess in my view, before I save the form, I need to geocode the address and set the lat and long. How do I set the latitude and longitude before saving?

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• C lang. -- Error: Segmentaion fault

  - by user233542

  I don't understand why this would give me a seg fault. Any ideas? this is the function that returns the signal to stop the program: (below is the other function that is called within this) double bisect(double A0,double A1,double Sol[N],double tol,double c) { double Amid,shot; while (A1-A0 tol) { Amid = 0.5*(A0+A1); shot = shoot(Sol, Amid, c); if (shot==2.*Pi) { return Amid; } if (shot > 2.*Pi){ A1 = Amid; } else if (shot < 2.*Pi){ A0 = Amid; } } return 0.5*(A1+A0); } double shoot(double Sol[N],double A,double c) { int i,j; /Initial Conditions/ for (i=0;i for (i=buff+2;i return Sol[i-1]; } buff, l, N are defined using a #deine statement. l = 401, buff = 50, N = 2000 Thanks

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• Microsoft _stprintf warning

  - by mnh

  Why I get the following warning for the following code :) Code: _stprintf(m_szFileNamePath,_T("%s"),strFileName); warning C4996: '_swprintf': swprintf has been changed to conform with the ISO C standard, adding an extra character count parameter. To use traditional Microsoft swprintf, set _CRT_NON_CONFORMING_SWPRINTFS. I know _strprintf is a macro which if _UNICODE is defined will evaluate to _swprintf else it will be sprintf. Now what is this _swprintf. There is a function swprintf, but why is _stprintf evaluating to _swprintf instead of swprintf. What is the difference b/w the _xxx and xxx functions? EDIT: Okay there are two definitions for the UNICODE version of _stprintf, which one is included? The one in tchar.h or strsafe.h?

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• Sharing beans from contextListener -- dispatcher servlet

  - by Ernest

  Hello! ok, i have another question now. I have a bunch of beans loaded succesfully in applicationContext.xml, which loads from web.xml: contextConfigLocation applicationContext.xml org.springframework.web.context.ContextLoaderListener Here are is the bean defined in applicationContext.xml that i want to share: it loads other beans (DAOs) which are initialized with hibernet. I need to acces catalogFacadeTarget from the dispatcherServlet, declared in web.xml: dispatcher org.springframework.web.servlet.DispatcherServlet 1 <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>*.htm</url-pattern> </servlet-mapping> and configured dispatcher-servlet.xml like this: welcome There! in the property called catalogFacadeImpl. If you need the entire applicationCOntext.xml, web.xml, and dispatcher-servlet.xml please let me know. From what i read, i should be able to share beans if i declared them in the contextConfigLocation configuration file. Thank you very much in advance.

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• Assembly not referenced error with Interactive Brokes ActiveX API

  - by Lirik

  I'm attempting to use the Interactive Brokers ActiveX API, but I'm having a little trouble: error CS0012: The type 'System.Windows.Forms.AxHost' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. My code: namespace DataFeed.Gateway { class IBGateway : IGateway { private AxTWSLib.AxTws tws; //<-- the error line //... } } I have a console application, so I'm wondering if that might be the reason why ActiveX is not working... or is there something else going on here? Maybe I should add the AxTWSlib.dll to the GAC, but do I really have to? If I add the dll as a resource, then I thought that I don't need to add it to the GAC. Note: I've dropped the AxTWSlib.dll in my project folder and I've added it to the project references... no problems there.

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• frequency of objects in an array using Ruby

  - by eastafri

  If i had a list of balls each of which has a color property. how can i cleanly get the list of balls with the most frequent color. [m1,m2,m3,m4] say, m1.color = blue m2.color = blue m3.color = red m4.color = blue [m1,m2,m4] is the list of balls with the most frequent color My Approach is to do: [m1,m2,m3,m4].group_by{|ball| ball.color}.each do |samecolor| my_items = samecolor.count end where count is defined as class Array def count k =Hash.new(0) self.each{|x|k[x]+=1} k end end my_items will be a hash of frequencies foreach same color group. My implementation could be buggy and i feel there must be a better and more smarter way. any ideas please?

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• How is includegraphic interfering with tabular?

  - by Charles Stewart

  I'm editing a text provided by my client as a LyX file that includes graphics and other files that I don't have. I've "commented out" the graphics by putting in a custom preamble that substitutes the file-loading definitions with macros that just quote their arguments. However, the \includegraphic macro throws up an error in the two tabular environments where it is used, complaining that \endfirsthead was never defined. What is this macro, and why is it interfering with mine? The preamble: \usepackage{natbib} \def\fileloc{/some/path/stylefile} \newif\iftextproof \IfFileExists\alifefileloc\textproofalse\textprooftrue \iftextproof \usepackage{./stylefile} %natbib subst: \renewcommand\cite[1]{{\tt #1}} %suppress graphics includes: \def\quotearg#1{\expandafter\string\csname #1\endcsname} \newcommand\gobbleIG[2][*void*]{{\footnotesize \quotearg{#2}}} \newcommand\gobbleSF[2][*unnamed*]{{\bf #1}} \let\includegraphics=\gobbleIG \let\subfigure=\gobbleSF \else \usepackage\fileloc \fi

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• change `dest` option on the fly

  - by Rikard

  I have some grunt tasks to compile files and would like to "recicle" them inside different tasks. I am trying to modify the destination directory without success... My idea is something like: grunt.registerTask('bower', ['compile:index', 'compile:core'], function(){ this.options({dest: 'dist/*.js'}); }); The compile:index task runs good by itself (i.e. when called alone) and has dest: 'index.js, other tasks have other filenames. I would like to change these inside the bowertask, adding a new directory but keeping the filename defined in the original task. Is this possible?

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• Can Hibernate default a Null String to Empty String

  - by sliver

  In our application we are pulling data from a DB2 mainframe database. If the database has "low values" in a field, hibernate sends a "null" value in the object. This occurs even if the column is defined as "not null". As we are doing XML parsing on this, Castor is having trouble with it. I would like to fix this in Hibernate. Also, all of the hibernate hbm files are generated, so we can't mess with them (they are regened from time to time.) Any way to intercept all Strings and replace nulls with ""?

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• What is the JavaScript variable scope in a switch / case statment?

  - by Todd Moses

  While creating JavaScript with ASP.NET MVC I noticed several scope warnings and realized that I am missing something with understanding the variable scope inside the switch / case statement. Warning: 'i' is already defined referring to case b and case c My code looks similar to this: switch(element) { case 'a': for(var i=0; i < count; i++){ do something } break; case 'b': for(var i=0; i < count; i++){ do something } break; case 'c': for(var i=0; i < count; i++){ do something } break; } I thought scope ended with each break statement but it seems that scope does not end until the end of the switch/case. Is scope for the entire switch/case?

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• PhysX SDK - error LNK2019: unresolved external symbol when compiling "wavefront.cpp"

  - by user370102

  Hi all, I'm using the PhysX SDK and I'm trying to load an .obj file with the WavefrontObj object which is defined by the files "wavefront.h/.cpp", localized in the samples directory. When I'm compiling my project, I got this error: 1Linking... 1wavefront.obj : error LNK2019: unresolved external symbol "char * __cdecl FindMediaFile(char const *,char *)" (?FindMediaFile@@YAPADPBDPAD@Z) referenced in function "public: void __thiscall WAVEFRONT::InPlaceParser::SetFile(char const *)" (?SetFile@InPlaceParser@WAVEFRONT@@QAEXPBD@Z) 1C:\Users\Nicolas\Documents\GI05\CSED451 - Computer Graphics\ToyFK_Project\Debug\ToyFK_Project.exe : fatal error LNK1120: 1 unresolved externals I guess I forgot to link a library or something but I really can't find what... It's driving me crazy!!! Does somebody have an idea? Thank you

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• object representation and value representation

  - by FredOverflow

  3.9 §4 says: The object representation of an object of type T is the sequence of N unsigned char objects taken up by the object of type T, where N equals sizeof(T). The value representation of an object is the set of bits that hold the value of type T. For trivially copyable types, the value representation is a set of bits in the object representation that determines a value, which is one discrete element of an implementation-defined set of values. Does "The value representation of an object" imply that values are always stored in objects? What is the value representation of non-trivially copyable types?

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• Read xml file and import only one table from multiple tables from xml file in the dataset at a time.

  - by Harikrishna

  I want to store the data in the xml file and retrieve the data from that. I have defined more than table in that xml file.Now to read the tables I am using dataset ds = new dataset(); ds.ReadXml(xmlfilepath); Now this dataset contains all the tables those are in xml file when we read the xml file into dataset. But I want only one specified table at a time in a dataset by condition. Like there are PersonalInfo,OtherInfo,PropertiesInfo tables in the xml file. But I want only OtherInfo table in dataset what I should do ?

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• How can I tell NetBeans to use the latest available version of a JAR for a library?

  - by Freiheit

  I have a Netbeans project with a library defined which includes several JARs. These JARs are versioned like lib\blah\com.blah.wibble.jar_0.6.1.201004161543 . These are nightly builds from another project so that version changes often. I know I can point NetBeans at the specific JARs with the version name, but this means that every time I get a new version I have to update the NetBeans library. I can also strip the version name from the JARs, but this makes it hard to track down bugs. "What version of the blah JARs?" is usually the second thing we ask when we find a bug. Is it possible to tell Netbeans to use included com.blah.wibble.jar_[??????] where ???? is some sort of automatic pointer to use the latest available version?

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• Adding DataAnnontations to Generated Partial Classes

  - by Naz

  Hi I have a Subsonic3 Active Record generated partial User class which I've extended on with some methods in a separate partial class. I would like to know if it is possible to add Data Annotations to the member properties on one partial class where it's declared on the other Subsonic Generated one I tried this. public partial class User { [DataType(DataType.EmailAddress, ErrorMessage = "Please enter an email address")] public string Email { get; set; } ... } That examples gives the "Member is already defined" error. I think I might have seen an example a while ago of what I'm trying to do with Dynamic Data and Linq2Sql.

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• Python nested dict comprehension with sets

  - by Jasie

  Can someone explain how to do nested dict comprehensions? >> l = [set([1, 2, 3]), set([4, 5, 6])] >> j = dict((a, i) for a in s for i, s in enumerate(l)) >> NameError: name 's' is not defined I would have liked: >> j >> {1:0, 2:0, 3:0, 4: 1, 5: 1, 6: 1} I just asked a previous question about a simpler dict comprehension where the parentheses in the generator function were reduced. How come the s in the leftmost comprehension is not recognized?

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• C# implicit conversions

  - by Chris Boden

  Hello, I'm currently working on an application where I need to load data from an SQL database and then assign the retrieved values into the properties of an object. I'm doing this by using reflection since the property names and column names are the same. However, many of the properties are using a custom struct type that is basically a currency wrapper for the decimal type. I have defined an implicit conversion in my struct: public static implicit operator Currency(decimal d) { return new Currency(d); } This works fine when I use it in code. However, when I have this: foreach (PropertyInfo p in props) { p.SetValue(this, table.Rows[0][p.Name], null); } It throws an ArgumentException stating that it cannot convert from System.Decimal to Currency. I'm confused since it works fine in any other circumstance.

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• Ruby on Rails: Unit Testing non activerecord models and still load fixtures

  - by Vaibhav Gumashta

  I may be missing something but I am stuck in this scenario: I have a non activerecord model, which I want to test. I have derived its test case class from: Test::Unit::TestCase. However, the test case class for the model, uses within itself, other activerecord model classes and I want to load fixtures for them. My problem is that the fixtures class method is available only when I subclass the test case class from ActiveSupport::TestCase (it is defined within ActiveRecord::TestFixtures which gets included in ActiveSupport::TestCase). Any help, coz running the tests gives me the error: undefined method "fixtures" (which is understandable) and in case I derive my test case class from ActiveSupport::TestCase it complains that there is no corresponding DB table. Also, I don't want to create a dummy table for backing my model class. Thanks a ton!

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• The reason for MonadState get and put?

  - by CiscoIPPhone

  I'm reading the Monads chapter in Real World Haskell (chapter 14). A function is defined as follows: type RandomState a = State StdGen a getRandom :: Random a => RandomState a getRandom = get >>= \gen -> let (val, gen')= random gen in put gen' >> return val I don't really understand the purpose of the get and put functions here. I rewrote the function as following which seems to do the same thing and is more concise: getRandom2 :: Random a => RandomState a getRandom2= State $ \ s -> random s So my question is: What is the purpose of get and put?

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• Determining whether compiling on Windows or other system

  - by NumberFour

  Hi, Im currently developing a cross-platform C application. Is there any compiler macro which is defined only during compilation on Windows, so I can #ifdef some Windows specific #includes? Typical example is selecting between WinSock and Berkeley sockets headers: #ifdef _WINDOWS #include <winsock.h> #else #include <sys/socket.h> #include <netinet/in.h> #include <sys/un.h> #include <arpa/inet.h> #include <netdb.h> #endif So the thing Im looking for is something like that _WINDOWS macro. Thanks for any tips.

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