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  • Iterator not accessible because of private inheritance

    - by Bo Tian
    I've created a new class that composes std::deque by private inheritance, i.e, class B : private std::deque<A> { ... }; and in my source code I tried to use iterator of B, i.e., B::iterator it The compiler error is error C2247: 'std::deque<_Ty>::iterator' not accessible because 'B' uses 'private' to inherit from 'std::deque<_Ty>' So the question is, how can I make the iterator accessible?

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  • Unit testing installation of services

    - by skiphoppy
    Our installer program is going to be installing a number of system services, under both Windows and UNIX, using JavaServiceWrapper. There will be a class responsible for creating JavaServiceWrapper config files, installing the services, etc. Can I have some suggestions on how to unit-test this class?

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  • mvc create my own html helper, how can i access httpcontext?

    - by rj
    Hi, I've come across two recommendations for creating custom html helpers: either extend an existing one, or write your own class. I'd prefer to keep my custom code separated, it seems a bit sloppy to extend helpers for a decent-size application. But the benefit I see in extending is that 'This HtmlHelper helper' is passed as a parameter, through which I can get ViewContext.HtmlContext. My question is, how can I roll my own helper class and still have ViewContext.HtmlContext available to me? Thanks!

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  • Tomcat Postgres Connection

    - by user191207
    Hi, I'm using a singleton class for a PostgresSQL connection inside a servelet. The problem is that once it is open it works for a while (I guess until some timeout), and then it starts throwing a I/O exception. Any idea what is happening to the singleton class inside Tomcat VM? Thanks

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  • ClassNotFoundException: org.datanucleus.store.appengine.jpa.DatastorePersistenceProvider

    - by Kiva
    I try to start an Google appengine application in my eclipse. I have the Google plugin and I set the sdk for my application. But, when I start this one, I get the following error: java.lang.ClassNotFoundException: org.datanucleus.store.appengine.jpa.DatastorePersistenceProvider However, this class is present in the sdk which is present in my classpath. Why Appengine doesn't find this class ? Thanks.

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  • Unexpected tag T_ECHO in inline if

    - by Lombo
    I have something like this in one of my views <li <?php $isCurrent ? echo 'class="current"' : ''?> > <a href="SOME_LINK" class="SOME_CLASS">SOME_TEXT</a> </li> This causes a syntax error, unexpected T_ECHO. Changing echo for print solves the issue, but I would like to understand why I cannot use echo.

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  • the shema return by the new query differ from the base query

    - by sochandara
    I am working on class project which required to work with Windows Application and this issue occurred to me that i don understand how to solved it can anybody help please? I want to show the NATIONALITYNAME instead of showing NATIONALITYID in the grid view SELECT COACH.COACHID , COACH.COACHFIRSTNAME , COACH.COACHLASTNAME , NATIONALITY.NATIONALITY FROM COACH INNER JOIN NATIONALITY ON COACH.NATIONALITYID = NATIONALITY.NATIONALITYID Error Message: "The Schema returned by the new query differ from the base query"

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  • How can I get rid of the resize-handle in a QDialog?

    - by Georg
    I've got the following class: class SelectDateDialog(QDialog): startDate = date.today() endDate = date.today() def __init__(self, text, isInterval = False): QDialog.__init__(self) uic.loadUi("resources/SelectDate.ui", self) Now, the dialog is resizable on Mac OS X 10.5, but it shouldn't be. It has the resize-handle in the lower right corner. I've already tried the setSizeGripEnabled function, it didn't change anything. How can I make it not resizable?

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  • How to decode "application/x-qabstractitemmodeldatalist" in Qt for drag and drop?

    - by gct
    I've created a child class of QTreeWidget that I want to be able to drag items from another tree widget too (I want to handle the insertion myself though), as well as from a QListWidget. I've overridden the dropEvent method in my class, and it looks like the mimetype of the data I'm getting from my QTreeWidget is application/x-qabstractitemmodeldatalist, how can I decode this to get the items from the tree back out?

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  • how to send some data to the Thread module on python and google-map-engine

    - by zjm1126
    from google.appengine.ext import db class Log(db.Model): content = db.StringProperty(multiline=True) class MyThread(threading.Thread): def run(self,request): #logs_query = Log.all().order('-date') #logs = logs_query.fetch(3) log=Log() log.content=request.POST.get('content',None) log.put() def Log(request): thr = MyThread() thr.start(request) return HttpResponse('') error is : Exception in thread Thread-1: Traceback (most recent call last): File "D:\Python25\lib\threading.py", line 486, in __bootstrap_inner self.run() File "D:\zjm_code\helloworld\views.py", line 33, in run log.content=request.POST.get('content',None) NameError: global name 'request' is not defined

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  • Stepping into Ruby Meta-Programming: Generating proxy methods for multiple internal methods

    - by mstksg
    Hi all; I've multiply heard Ruby touted for its super spectacular meta-programming capabilities, and I was wondering if anyone could help me get started with this problem. I have a class that works as an "archive" of sorts, with internal methods that process and output data based on an input. However, the items in the archive in the class itself are represented and processed with integers, for performance purposes. The actual items outside of the archive are known by their string representation, which is simply number_representation.to_s(36). Because of this, I have hooked up each internal method with a "proxy method" that converts the input into the integer form that the archive recognizes, runs the internal method, and converts the output (either a single other item, or a collection of them) back into strings. The naming convention is this: internal methods are represented by _method_name; their corresponding proxy method is represented by method_name, with no leading underscore. For example: class Archive ## PROXY METHODS ## ## input: string representation of id's ## output: string representation of id's def do_something_with id result = _do_something_with id.to_i(36) return nil if result == nil return result.to_s(36) end def do_something_with_pair id_1,id_2 result = _do_something_with_pair id_1.to_i(36), id_2.to_i(36) return nil if result == nil return result.to_s(36) end def do_something_with_these ids result = _do_something_with_these ids.map { |n| n.to_i(36) } return nil if result == nil return result.to_s(36) end def get_many_from id result = _get_many_from id return nil if result == nil # no sparse arrays returned return result.map { |n| n.to_s(36) } end ## INTERNAL METHODS ## ## input: integer representation of id's ## output: integer representation of id's def _do_something_with id # does something with one integer-represented id, # returning an id represented as an integer end def do_something_with_pair id_1,id_2 # does something with two integer-represented id's, # returning an id represented as an integer end def _do_something_with_these ids # does something with multiple integer ids, # returning an id represented as an integer end def _get_many_from id # does something with one integer-represented id, # returns a collection of id's represented as integers end end There are a couple of reasons why I can't just convert them if id.class == String at the beginning of the internal methods: These internal methods are somewhat computationally-intensive recursive functions, and I don't want the overhead of checking multiple times at every step There is no way, without adding an extra parameter, to tell whether or not to re-convert at the end I want to think of this as an exercise in understanding ruby meta-programming Does anyone have any ideas? edit The solution I'd like would preferably be able to take an array of method names @@PROXY_METHODS = [:do_something_with, :do_something_with_pair, :do_something_with_these, :get_many_from] iterate through them, and in each iteration, put out the proxy method. I'm not sure what would be done with the arguments, but is there a way to test for arguments of a method? If not, then simple duck typing/analogous concept would do as well.

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  • Left Outer Join on Many-to-One Mapping

    - by Colin Bowern
    I have a reference to call that may or may not be there. When I add the nullable option it still doing Inner Join when I want an Outer Left Join (show the left even if the right is null). Is this possible in the NH map? References(x => x.DefaultCategory, "CATEGORY_ID") .Nullable();

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  • How change Castor mapping to remove "xmlns:xsi" and "xsi:type" attributes from element in XML output

    - by Derek Mahar
    How do I change the Castor mapping <?xml version="1.0"?> <!DOCTYPE mapping PUBLIC "-//EXOLAB/Castor Mapping DTD Version 1.0//EN" "http://castor.org/mapping.dtd"> <mapping> <class name="java.util.ArrayList" auto-complete="true"> <map-to xml="ArrayList" /> </class> <class name="com.db.spgit.abstrack.ws.response.UserResponse"> <map-to xml="UserResponse" /> <field name="id" type="java.lang.String"> <bind-xml name="id" node="element" /> </field> <field name="deleted" type="boolean"> <bind-xml name="deleted" node="element" /> </field> <field name="name" type="java.lang.String"> <bind-xml name="name" node="element" /> </field> <field name="typeId" type="java.lang.Integer"> <bind-xml name="typeId" node="element" /> </field> <field name="regionId" type="java.lang.Integer"> <bind-xml name="regionId" node="element" /> </field> <field name="regionName" type="java.lang.String"> <bind-xml name="regionName" node="element" /> </field> </class> </mapping> to suppress the xmlns:xsi and xsi:type attributes in the element of the XML output? For example, instead of the output XML <?xml version="1.0" encoding="UTF-8"?> <ArrayList> <UserResponse xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="UserResponse"> <name>Tester</name> <typeId>1</typeId> <regionId>2</regionId> <regionName>US</regionName> </UserResponse> </ArrayList> I'd prefer <?xml version="1.0" encoding="UTF-8"?> <ArrayList> <UserResponse> <name>Tester</name> <typeId>1</typeId> <regionId>2</regionId> <regionName>US</regionName> </UserResponse> </ArrayList> such that the element name implies the xsi:type.

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  • How to create a subject helper method in Rspec2

    - by Hedgehog
    In rpsec 2.12 I expected this helper method definition to work: module X private def build_them(type) puts 'Catching the star' end end context 'public/private instance methods' do subject{ Class.new { extend(::X) } } def subject.build(type) puts "Throwing a star" build_them(type) end it{ should respond_to :build} end The actual result is a failed spec: expected #<Class:0x00000002ea5f90> to respond to :build I expected the example to pass Any suggestions on how to do this correctly?

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  • Big, Thick Reference Books (PHP / MySQL / Unix) [closed]

    - by Josh K
    I'm looking for in-depth reference books / guides in PHP, MySQL, and Unix. I'm aware there other other questions pertaining to good books for short references of function names, or detailed beginner guides to these systems. I'm looking for something different. I want a book that I can either use as a quick but in-depth (decent write up, not a pocket reference guide) reference to common functions (JOINS, string manipulation, Regular Expressions, etc) while also providing a detailed inner workings explanation on the system itself.

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  • Searching LPSTR string

    - by David21
    I want to find some words after i get the whole file to char*. I know how to do it using the string class functions but i don't want to copy the data again to a string variable. is there any similar functions available to use for char* strings or should i still use string class?

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  • How to implement == or >= operators for generic type

    - by momsd
    I have a generic type Foo which has a internal generic class Boo. Boo class a property Value of type K. In a method inside Foo i want to do a boo.Value >= value Note that second operand value is of type T. while compiling i am getting following error: Operator '=' cannot be applied to operands of type 'T' and 'T' Can anyone please tell me whats the problem here?

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  • Creating a Type object corresponding to a generic type

    - by Alexey Romanov
    In Java, how can I construct a Type object for Map<String, String>? System.out.println(Map<String, String>.class); doesn't compile. One workaround I can think of is private Map<String, String> dummy() { throw new Error(); } Type mapStringString = Class.forName("ThisClass").getMethod("dummy", null).getGenericReturnType(); Is this the correct way?

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  • Django admin's filter_horizontal (& filter_vertical) not working

    - by negus
    I'm trying to use ModelAdmin.filter_horizontal and ModelAdmin.filter_vertical for ManyToMany field instead of select multiple box but all I get is: My model: class Title(models.Model): #... production_companies = models.ManyToManyField(Company, verbose_name="????????-?????????????") #... My admin: class TitleAdmin(admin.ModelAdmin): prepopulated_fields = {"slug": ("original_name",)} filter_horizontal = ("production_companies",) radio_fields = {"state": admin.HORIZONTAL} #... The javascripts are loading OK, I really don't get what happens. Django 1.1.1 stable.

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  • Call a block method on an iterator: each.magic.collect { ... }

    - by blinry
    I have a class with a custom each-method: class CurseArray < Array def each_safe each.do |element| unless element =~ "fuck" yield element end end end end And want to call block methods on those "selected" elements. For example: curse_array.each_safe.magic.collect {|element| "#{element} is a nice sentence."} I know there is a way to do this, but I've forgotten. Please help! :-)

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