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  • How to know when my control changes size?

    - by Mason Wheeler
    I'm building a custom control, and I need it to be able to respond when it gets resized. I need the old dimensions and the new dimensions available in order to do some calculations. Unfortunately, the SetWidth and SetHeight methods are private to TControl, not protected, and so I can't override them. Is there any other way to know that my control's about to be resized, and to have the old size and the new size both available?

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  • Overriding an abstract method of base class

    - by jess
    Hi, I have an abstract class with some methods,including an abstract method(Execute()).This method is overridden in child class.Now, an event is raised(somewhere in application),and for this event there is a handler in base class.And,in this handler,I call Execute. Now, the method of chilobject is executed.I am bit confused,how this works under the hood?

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  • Why Directly Accesing property is not recommended in OOPs PHP?

    - by Parth
    If I have a class "person" with a property $name and its getter(get_name()) and setter(set_name()) methods, then after instantiating the objects and setting the property i.e. $paddy = new person(); $paddy->set_name("Padyster Dave"); echo "Paddy's full name: ".$paddy->name; //WHY THIS IS NOT RECOMMENDED... In the above code $paddy->name;WHY THIS IS NOT RECOMMENDED?

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  • Setting property of objects in datacontext

    - by ryudice
    Hi, all my entities have a common property which specifies the company they belong to, I would like to set this property in a method in my datacontext but I do not want to use the partial methods for each of the entity types that the datacontext provides, is there a method that receives any entity that is inserted throught the datacontext so that I can hook to it or override it and set the property using reflection? thanks.

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  • iPhone init method return type

    - by William Jockusch
    Suppose we are writing a class (let's call it Class) in an iPhone program. In all the samples out there, the init methods are typically declared like this: -(id) initWithFoo: (Foo *) foo My question is: would it be more logical to do the following? Why or why not? -(Class *) initWithFoo: (Foo *) foo

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  • Can you reverse order a string in one line with LINQ or a LAMBDA expression

    - by Student for Life
    Not that I would want to use this practically (for many reasons) but out of strict curiousity I would like to know if there is a way to reverse order a string using LINQ and/or LAMBDA expressions in one line of code, without utilising any framework "Reverse" methods. e.g. string value = "reverse me"; string reversedValue = (....); and reversedValue will result in "em esrever" EDIT Clearly an impractical problem/solution I know this, so don't worry it's strictly a curiosity question around the LINQ/LAMBDA construct.

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  • In what situation should the built-in 'operator' module be used in python?

    - by apphacker
    I'm speaking of this module: http://docs.python.org/library/operator.html From the article: The operator module exports a set of functions implemented in C corresponding to the intrinsic operators of Python. For example, operator.add(x, y) is equivalent to the expression x+y. The function names are those used for special class methods; variants without leading and trailing __ are also provided for convenience. I'm not sure I understand the benefit or purpose of this module.

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  • Example of standalone Apache Qpid (amqp) Junit Test

    - by Wiretap
    Does anyone have an example of using Apache Qpid within a standalone junit test. Ideally I want to be able to create a queue on the fly which I can put/get msgs within my test. So I'm not testing QPid within my test, I'll use integration tests for that, however be very useful to test methods handling msgs with having to mock out a load of services.

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  • Bind multiple events to jQuery 'live' method

    - by Will Peavy
    jQuery's 'live' method is unable to handle multiple events. Does anyone know of a good workaround to attach multiple events to a function that polls current and future elements? Or am I stuck using duplicate live methods for each event handler I need? Example - I am trying to do something like: $('.myclass').live('change keypress blur', function(){ // do stuff });

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  • AJAX modalpopupextender pressing enter when cancel is focused doesn't trigger cancel

    - by Jonn
    Been using the Ajax modalpopupextender. I used a script to set focus on the cancel button when it gets showed on the page but when I press enter (expecting that cancel would've been triggered since it was focused) it went ahead and triggered the event for the OK button (which, unfortunately was a delete event). I've tried using various methods for focusing on the Cancel button and trying to make it work. Anyone know how to make this work?

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  • Good suggestions for learning OOP PHP

    - by Doug
    I've been trying to learn PHP OOP and have looked at multiple articles, but have yet to find a good resource for learning. I want to learn from the user of setters and getters, $this-, constructors, and so on...! Can anyone please suggest me something? I noticed MOST teachings leave out the explanation of $this-. I want to learn magic methods, decorators, encapsulation, etc... Feel free to suggest something that I haven't explicitly listed.

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  • Is portobuf-net generated binary compatible with Google specs

    - by cornerback84
    Actually I want to serialize my data using Google's java implementation and then deserialize using C# implementation? I have chosen portobuf-net as it seems to be more stable (porto# is still v0.9 or I would have gone for it). Before I start working on it I wanted to be sure that I can achieve this (serializing data using java implementation and deserializing it using potobuf-net). Or is there any list of methods that are specific to portobuf-net implementation?

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  • QT:QString to char conversion

    - by mawia
    hi! all, I was tryin to convert a QSting to char* type but by following methods,but those does'nt seem to work. // QLineEdit *line=new QLineEdit();{just to describe what is line here} QString temp=line->text(); char *str=(char *)malloc(10); QByteArray ba=temp.toLatin1(); strcpy(str,ba.data()); can you elobrate the possible flaw with this method ,or tell alternative method.

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  • How can I prevent users from overriding the total cost in a shopping cart, when submitted as a hidde

    - by Gobi
    I'm having serious problems with accepting payments. I'm passing the total amount in a hidden field <input type="hidden" name="checkout-flow-support.merchant-checkout-flow-support.shipping-methods.flat-rate-shipping-1.price" value="129.00"/> Some of the users changed this value to 2 using firebug and submitted the form. Instead of getting $129, we only received $2. I have no idea how to proceed this anyone help me quick .

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  • Creating base class for Entities in Entity Framework

    - by Thomas
    I would like to create a base class that is somewhat generic for all of my entities. The class would have methods like Save(), Delete(), GetByID() and some other basic functionality and properties. I have more experience with Linq to SQL and was hoping to get some good examples for something similar in the EF. Thank you.

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  • Are Maybes a good pattern for scala?

    - by Fred Haslam
    For a while I have been struggling to integrate scala with java methods that might return null. I came up with the following utility which helps a lot: // produce an Option, nulls become None object Maybe { def apply[T](t:T) = if (t==null) None else Some(t) } Maybe(javaClass.getResultCouldBeNull()).map( result => doSomeWork(result) ) I have a few questions about this solution: Is there a better or more standard pattern to use? Am I duplicating something that already exists? Does this functionality have hidden gotchas?

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  • Python thinks I'm a different IP

    - by Yongho
    I'm trying to set a page that displays the visitor's IP. All the methods I have tried show an IP different from the IP my computer has. I've tried: Looking up http://www.whatismyip.com/automation/n09230945.asp Using socket.getaddrinfo(socket.gethostname(), None)[0][4][0] How can I find the real IP of the visitor?

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  • How do I tell ReSharper that an attribute means that a method is used?

    - by Roger Lipscombe
    I'm playing with SpecFlow, and ReSharper thinks that my step definitions are unused (I guess because they're used via reflection): [Binding] public class StepDefinitions { // ... [When(@"I press add")] public void WhenIPressAdd() // R# thinks this is unused { _calculator.PressAdd(); } // ... } How can I tell ReSharper that methods with [Given], [When], [Then] attributes (etc.) are actually used? I don't want to use // ReSharper disable UnusedMember.Global comments.

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  • iPhone App is leaking memory; Instruments and Clang cannot find the leak

    - by Norbert
    Hi, i've developed an iPhone program which is kind of an image manipulation program: The user get an UIImagePickerController and selects an image. Then the program does some heavy calculating in a new thread (for responsiveness of the application). The thread has, of course, its own autorelease pool. When calculation is done, the seperated thread signals the main thread that the result can be presented. The app creates a new view controller, pushes it onto the navigation controller. In short: UIImagePickerController new thread (autorelease pool) does some heavy calculation with image data signal to main thread that it's done main thread creates view controller and pushes it onto navigation controller view controller presents image result My program works well, but if I dismiss the navigation controller's top view controller by tapping on the back button and repeat the whole process several times, my app crashes. But only on the device! Instruments cannot find any leaks (except for some minor ones which I don't feel responsible for: thread creation, NSCFString; overall about 10 kB). Even Clang static analyzer tells me that my could seems to be all right. I know that the UIImage class can cache images and objects returned from convenience methods get freed only whet their autorelease pool gets drained. But most of the time I work with CGImageRef and I use UIImage' alloc, init & release methods to free memory as soon as possible. Currently, I don't know how to isolate the problem. How would you approach this problem? Crash Log: Incident Identifier: F4C202C9-1338-48FC-80AD-46248E6C7154 CrashReporter Key: bb6f526d8b9bb680f25ea8e93bb071566ccf1776 OS Version: iPhone OS 3.1.1 (7C145) Date: 2009-09-26 14:18:57 +0200 Free pages: 372 Wired pages: 7754 Purgeable pages: 0 Largest process: _MY_APP_ Processes Name UUID Count resident pages _MY_APP_ <032690e5a9b396058418d183480a9ab3> 17766 (jettisoned) (active) debugserver <ec29691560aa0e2994f82f822181bffd> 107 syslog_relay <21e13fa2b777218bdb93982e23fb65d3> 62 notification_pro <8a7725017106a28b545fd13ed58bf98c> 64 notification_pro <8a7725017106a28b545fd13ed58bf98c> 64 afcd <98b45027fbb1350977bf1ca313dee527> 65 mediaserverd <eb8fe997a752407bea573cd3adf568d3> 319 ptpd <b17af9cf6c4ad16a557d6377378e8a1e> 142 syslogd <ec8a5bc4483638539fa1266363dee8b8> 68 BTServer <1bb74831f93b1d07c48fb46cc31c15da> 119 apsd <a639ba83e666cc1d539223923ce59581> 165 notifyd <2ed3a1166da84d8d8868e64d549cae9d> 101 CommCenter <f4239480a623fb1c35fa6c725f75b166> 161 SpringBoard <8919df8091fdfab94d9ae05f513c0ce5> 2681 (active) accessoryd <b66bcf6e77c3ee740c6a017f54226200> 90 configd <41e9d763e71dc0eda19b0afec1daee1d> 275 fairplayd <cdce5393153c3d69d23c05de1d492bd4> 108 mDNSResponder <f3ef7a6b24d4f203ed147f476385ec53> 103 lockdownd <6543492543ad16ff0707a46e512944ff> 297 launchd <73ce695fee09fc37dd70b1378af1c818> 71 **End**

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