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  • How created method with signature as List

    - by London
    Hi all, I'm very new to Java programming language so this is probably dumb question but I have to ask it because I can't figure it out on my own. Here is the deal. I want to create method which extracts certain object type from a list. So the method should receive List as argument, meaning list should contain either Object1 or Object2. I've tried like this : public Object1 extractObject(List<?>){ //some pseudo-code ... loop trough list and check if list item is instance of object one return that instance } The problem with declaring method with List<?> as method argument is that I receive compilation error from eclipse Syntax error on token ">", VariableDeclaratorId expected after this token. How do I set the method signature properly to accept object types either Object1 or Object2 ? Thank you

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  • How do I tell NHibernate to load a component as not null even when all its properties are null?

    - by SharePoint Newbie
    Hi, I have a Date class which wraps over the DateTime? class (aids in mocking DateTime.Now, our domain ,etc). The Date class class only has one protected property : DateTime? date public class Date { protected DateTime? date; } // mapping in hbm <component name="CompletedOn"> <property column="StartedOn" name="date" access="field" not-null="false" /> </component> From the nhibernate docs: Like all value types, components do not support shared references. The null value semantics of a component are ad hoc. When reloading the containing object, NHibernate will assume that if all component columns are null, then the entire component is null. This should be okay for most purposes. Can I override this behaviour? I want my Date class to be instantiated even if date is null. Thanks,

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  • Visual Studio - how to create two projects using the same sources

    - by mack369
    My solution consists of 2 executable projects and a couple dlls. Project1 is a Smart Device Project, Project2 is a Windows Forms Project. Both projects use the same libraries, the reason of that is I want to test my libraries on PC before I deploy it on the device. The problem is that the DLL project type can be Smart Device Class Library or Class Library, not both. I cannot add a reference from SD project to WF and vice versa. I was able to add reference from SD project to a dll file (generated from Class Library project) instead of the project itself, but for some reason I got the message "cannot load XXX type from YYY assembly". It doesn't depend on my code, because when I created separate project for the same sources, everything was fine. The only solution I've found is to create 2 types of projects for each library, but I don't know how to make 2 projects based on the same sources.

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  • C++ Constructor Initializer List - using member functions of initialized members

    - by Andy
    I've run into the following a few times with initializer lists and I've never been able to explain it well. Can anyone explain why exactly the following fails (I don't have a compiler to catch typos, so bear with me): class Foo { public: Foo( int i ) : m_i( i ) {} //works with no problem int getInt() {return m_i;} ~Foo {} private: int m_i; }; class Bar { public: Bar() : m_foo( 5 ), //this is ok m_myInt( m_foo.getInt() ) //runtime error, seg 11 {} ~Bar() {} private: Foo m_foo; int m_myInt; }; When trying to call member functions of members initialized higher up the initializer list, I get seg faults. I seem to recall this is a known problem (or perhaps somehow by design) but I've never seen it well described. The attached example is contrived with plain old data types, but substitute the Bar::m_myInt with another object lacking a default (empty) constructor and the issue is more real. Can anyone enlighten me? Thanks!

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  • How can I consume a WSDL (SOAP) web service in Python?

    - by DavidM
    I want to use a WSDL SOAP based web service in Python. I have looked at the Dive Into Python code but the SOAPpy module does not work under Python 2.5. I have tried using suds which works partly, but breaks with certain types (suds.TypeNotFound: Type not found: 'item'). I have also looked at Client but this does not appear to support WSDL. And I have looked at ZSI but it looks very complex. Does anyone have any sample code for it? The WSDL is https://ws.pingdom.com/soap/PingdomAPI.wsdl and works fine with the PHP 5 SOAP client.

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  • Enumeration classes in Java

    - by Crystal
    I have one class that declares an enumeration type as: public enum HOME_LOAN_TERMS {FIFTEEN_YEAR, THIRTY_YEAR}; Is this type usable in another class? I'm basically trying to complete a homework assignment where we have two types of loans, and one loanManager class. When I try to use the HOME_LOAN_TERMS.THIRTY_YEAR in my loanManager class that does not extend or implement the loan class, I get an error saying it 'cannot find symbol HOME_LOAN_TERMS.' So I did not know if my loanManager class needed to implement the two different loan classes. Thanks.

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  • C# How to create objects without class definitions?

    - by JL
    Is it possible to create objects at designtime without having to have hard coded class definitions, then populate properties with primitives or even strongly typed data types? This might sound confusing, so I will attempt to give you a use case scenario. Use case: You have an XML config file that could hold configuration values for connecting to various systems in an SOA application. In C# the XML file is read, but for each system the configuration properties are different (e.g: SQL might have a connection string, while SharePoint might need a username + password + domain + url, while yet an smtp server would need username + password + port + url) So instead of creating static classes as follows public class SharePointConfiguration or public class SQLConfiguration, then have each class with custom properties (this is cumbersome) or using a 1990's method, an arrayList or some named collection Is there not a more preferred way to achieve this? Taking advantage of new language features, that can still offer design time intellisense, which would make the code easier to maintain and less prone to error. Thanks

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  • Searching algorithmics: Parsing and processing a request

    - by James P.
    Say you were to create a search engine that can accept a query statement under the form of a String. The statement can be used to retrieve different types of objects with a given set of characteristics and possibly linked to other objects. In plain english or pseudo-code using an OOP approach, how would you go about parsing and processing statements as follows to get the series of desired objects ? get fruit with colour green get variety of apples, pears from Andy get strawberry with colour "deep red" and origin not Spain get total of sales of melons between 2010-10-10 and 2010-12-30 get last deliverydate of bananas from "Pete" and state not sold Hope the question is clear. If not I'll be more than happy to reformulate. P.S: This isn't homework ;)

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  • Python - network buffer handling question...

    - by Patrick Moriarty
    Hi, I want to design a game server in python. The game will mostly just be passing small packets filled with ints, strings, and bytes stuffed into one message. As I'm using a different language to write the game, a normal packet would be sent like so: Writebyte(buffer, 5); // Delimit type of message Writestring(buffer, "Hello"); Sendmessage(buffer, socket); As you can see, it writes the bytes to the buffer, and sends the buffer. Is there any way to read something like this in python? I am aware of the struct module, and I've used it to pack things, but I've never used it to actually read something with mixed types stuck into one message. Thanks for the help.

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  • What choices to make for an application backend

    - by Saif Bechan
    I am creating an web application and I at the point that i am starting to make backend choices. Now there are a lot of ways to go with this, so I am looking for some good points and back practices. Some of the question i have involve: Should i make a seperate table in the db for admin users Should i extend make some classes to load the admin data and the normal data, or make seperate classes for the admin section Where can i get some information on making different types of users Just some best practices for a backend My application is written in PHP with an MySQL database.

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  • How do you create a Google Maps-esque drop down dialog?

    - by Daniel Lew
    In the Google Maps application, when you open the menu and click on "Directions", it pops up a dialog that is unique to Google Maps. It keeps the MapView in the background, but displays the search dialog from the top (or bottom, if you're on an old version of Android). I was curious if anyone knew how they achieved this effect. I'm willing to create a custom Dialog, but it seems that Dialogs are designed to pop into the middle of the screen (any other types of dialogs are denied permission as system dialogs). What trick is Google Maps using?

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  • Drupal : Custom views filter

    - by Joseph
    Hi, First thing I would say is that I am a Drupal newbie. So, I would appreciate your answer in a detailed step by step process. I am using Drupal 6 and location module. There are two main content types - user profile (using content profile module) and event content type. Both have one field for location. Now, lets suppose in his profile, user is selecting city as Toronto and province as Ontario. And some events have been added for Toronto city. I need one Views, which will display events from user city. So, if user is from Vancouver, and they click on "my city events", they will see list of events from their city. Someone told me that I can achieve this using arguments/ relationships, but I don't know how to do that. Can someone please help me out? I am not good at PHP either :(

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  • Catching "NullPointerExceptions" in JavaScript

    - by Lenni
    I'm writing quite a bit of code in Prototype.js which returns null if a DOM-id wasn't found. $("someId").show(); If someId doesn't exist, a method will be called on null, which halts the entire program, in effect disabling all JS effects after the error. I could just check for null before executing such a statement, but this is getting tiring. I would like to catch an exception but I'm not sure which one its is. MDC lists the following ECMA Script error types: * Error * EvalError * RangeError * ReferenceError * SyntaxError * TypeError * URIError * DOMException * EventException * RangeException Also, do browsers have a unified way of dealing with a method call on null?

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  • RadioGroup getValue does not return correct slected value

    - by vagabond
    I'm running into a small issue with RadioGroup. My RadioGroup has possible values, true and false. The Radio types I have in my radiogroup use a Model that stores true or false. On an ajax onchange event I want to do some handling, and to do so I need to know the selected radio in my radiogroup and another identical radiogroup. The problem is getValue() only returns the initial value from my Pojo. Whenver I click on a radio button to change the selected Radio getValue() still returns the initial value. When I save my changes, my Pojo gets the correct value. I am finding this bizarre and have spent hours trying to figure our what I'm missing.

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  • Jsp declaration element

    - by Stardust
    <%! class father { static int s = 0; } %> <% father f1 = new father(); father f2 = new father(); f1.s++; out.println(f2.s); // It must print "1" %> When I run the file, I got this error. Can anybody explain? "The field s cannot be declared static; static fields can only be declared in static or top level types"

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  • C#: How to gracefully pass multiple conditions to Equals()

    - by Roy
    I'm new to C#, and I'm trying to write a program that selects file types from a FileInfo list. So far I have something along the lines of: List<FileInfo> files = new List<FileInfo>(); IEnumerable<FileInfo> result = files.Where(f=>f.Extension.Equals(".jpg", StringComparison.InvariantCultureIgnoreCase)|| f.Extension.Equals(".gif", StringComparison.InvariantCultureIgnoreCase) ); etc Obviously I'm not happy with this solution, but I don't know how to do this otherwise in a single call. What's the better way to go about it?

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  • Right rotate of tree in Haskell: how is it work?

    - by Roman
    I don't know haskell syntax, but I know some FP concepts (like algebraic data types, pattern matching, higher-order functions ect). Can someone explain please, what does this code mean: data Tree ? = Leaf ? | Fork ? (Tree ?) (Tree ?) rotateR tree = case tree of Fork q (Fork p a b) c -> Fork p a (Fork q b c) As I understand, first line is something like Tree-type declaration (but I don't understand it exactly). Second line includes pattern matching (I don't understand as well why do we need to use pattern matching here). And third line does something absolutely unreadable for non-haskell developer. I've found definition of Fork as fork (f,g) x = (f x, g x) but I can't move further anymore.

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  • Help System.Web.Compilation.BuildManager find a type in a non-referenced assembly

    - by asbjornu
    I'm trying to write a plug-in system where assemblies can be dropped in a folder that ASP.NET has no knowledge about. This plug-in system works fine for ASP.NET MVC based assemblies, but for old-school WebForm assemblies (where the .aspx files Inherits the System.Web.UI.Page derived classes) System.Web.Compilation.BuildManager is responsible for compiling the .aspx file into a dynamic assembly. My problem is that the BuildManager knows nothing about the assemblies within my plug-in folder and it seems to be absolutely nothing I can do to help it. If I do: BuildManager.GetType("Type.Defined.In.Plugin.Assembly", true, true) it throws. If I first get a reference to the Type and then try: var instance = BuildManager.CreateInstanceFromVirtualPath(path, type); it still throws, even though I've now passed in the specific type it needs to compile the .aspx file. Is there anything I can do to help BuildManager find the types it needs to compile the .aspx file?

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  • Inheritance in tables - structure problem

    - by Naor
    I have 3 types of users in my system. each type has different information I created the following tables: BaseUser(base_user_id, username, password, additional common data) base_user_id is PK and Identity UserType1(user_id, data related to type1 only) user_id is PK and FK to base_user_id UserType2(user_id, data related to type2 only) user_id is PK and FK to base_user_id UserType3(user_id, data related to type3 only) user_id is PK and FK to base_user_id Now I have relation from each type of user to warehouses table. Users from type1 and type2 should have only warehouse_id and users from type3 should have warehouse_id and customer_id. I thought about this structure: WarehouseOfUser(base_user_id,warehouse_id) base_user_id is FK to base_user_id in BaseUser WarehouseOfTyp3User(base_user_id,warehouse_id, customer_id) base_user_id is FK to base_user_id in BaseUser The problem is that such structure allows 2 things I want to prevent: 1. add to WarehouseOfTyp3User data of user from type2 or type1. 2. add to WarehouseOfUser data of user from type3. what is the best structure for such case?

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  • Javascript: variable scope & the evils of globals

    - by Nick
    I'm trying to be good, I really am, but I can't see how to do it :) Any advice on how to not use a global here would be greatly appreciated. Let's call the global G. Function A Builds G by AJAX Function B Uses G Function C Calls B Called by numerous event handlers attached to DOM elements (type 1) Function D Calls B Called by numerous event handlers attached to DOM elements (type 2) I can't see how I can get around using a global here. The DOM elements (types 1 & 2) are created in other functions (E&F) which are unconnected with A. I don't want to add G to each event handler (because it's large and there's lots of these event handlers), and doing so would require the same kind of solution as I'm seeking here (i.e., getting G to E&F). The global G, BTW, is an array that is necessary to build other elements as they, in turn, are built by AJAX. I'm not convinced that a singleton is real solution, either. Thanks.

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  • Prevent backspace button from navigating back in Sharepoint 2010 and IE

    - by Machinegon
    as a user requirement I have to disable the backspace button from navigating back in the history. I made the following piece of code //Bind back nutton to prevent escaping the page with backspace $j(document).unbind('keydown').bind('keydown', function (event) { var doPrevent = false; if (event.keyCode === 8) { if(event.target == document.body){ if(event.preventDefault()){ event.preventDefault(); } event.stopEvent(); event.returnValue = false; } } }); This is working perfectly in all the browsers except IE8/7. I cannot bind the input types as exceptions because the content editor in sharepoint allows to modify the text in div or paragraph elements etc. The solution is not working in IE8 because the event.target returns the element that is on mouseover when there's no controls that has the focus. All tips will be appreciated. Thanks!!

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  • How to pass or display mySQL data based on subscription or billing

    - by spm
    I want to build a PHP based site where, the user can view data based on the types of data they've paid for. Allow me to use something simple for an example. Let's say historical data for basketball was not readily available but could be purchased. Simple information such as the Winner, Loser, Final score and date are all stored in a mySQL table. What would be involved so that, when the user logs in, they can only see the historical data they have paid for. My theories so far about the architecture: I imagined a mySQL table storing True or False values for all historical game data they have paid for. Based on this, a 'data chart' object enables the user to view all data within their mySQL row which has a value of 'true.' Follow ups: Assuming I am correct, what methods are popular or practical for this type of service.

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  • number of months between two dates - using boost's date

    - by MartinP
    I've used boost::gregorian::date a bit now. I can see that there are the related months & years & weeks duration types. I can see how to use known durations to advance a given date. Qu: But how can I get the difference between two dates in months (or years or weeks) ? I was hoping to find a function like: template<typename DURATION> DURATION date_diff<DURATION>(const date& d1,const date& d2); There would need to be some handling of rounding too.

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  • PHP Script for redirecting to url

    - by Aruna
    hi, i am having a 2 Urls like http://www.abc.com and http://www.xyz.com. I am trying to redirect to http://www.xyz.com whenever i type http://www.abc.com in the browser. And also when the user types http://www.abc.com/index.php?option=com_content&view=article&id=46&Itemid=55 something like this ie. any query next to abc.com then i am trying to redirect to http://www.xyz.com/index.php?option=com_content&view=article&id=46&Itemid=55. how to do this in Php... Please help me..

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  • JQuery drag and Drop

    - by dremay
    I wish to create an Interface to choose Multiple answers using Drag & Drop rather than CheckBox near to the answers. User can choose two types of answers (Real Answer and a Fake Answer). The User has Two Images (for Real & Fake) on the answer page. User can drag an Image and drop near to the selected answer. It is possible to change the selection by moving the "image and drop over some other answer". I have used a "div formatted with an image" near to all answers, so user can drop the image (ie fake or real image) over this "div". I have used JQuery to move the "image" and drop over the "div". Now I need add the code to the "div" (ie container used to hold the image) to identify which "image is placed over it" ie either "fake or real".

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