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• C++: Is windows.h generally an efficient code library?

  - by Alerty

  I heard some people complaining about including the windows header file in a C++ application. They mentioned that it is inefficient. Is this just some urban legend or are there really some real hard facts behind it? In other words, if you believe it is efficient or inefficient please explain how this can be with facts. I am no C++ Windows programmer guru. It would really be appreciated to have detailed explanations.

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• Why is Visual Basic used?

  - by Arrieta

  I don't mean to start a holy war here, but I cannot fathom why would anybody use Visual Basic for a new project. Can you explain me why is it used? What new applications (which a lay person may be familiar with) have been developed in it? Why is it chosen over other languages? Thanks.

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• Confusing of TTimeSpan usage in Delphi 2010

  - by stanleyxu2005

  Hi All, I tried the new Record type TTimeSpan in Delphi 2010. But I encourage a very strange problem. assert(TTimeSpan.FromMilliseconds(5000).Milliseconds == 5000); This assertion does not pass. The value of 'TTimeSpan.FromMilliseconds(5000).Milliseconds' is always 0. I really cannot explain.

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• What one unknown/uncommon knowledge greatly helps you in _____ language?

  - by Kerry

  I seem to keep running into little tidbits that help drastically in different areas of different languages. For instance, a few days ago I learned about EXPLAIN SELECT... for any MySQL query that seems to be going slow. It took my 196 second query to 0.0084 seconds.

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• I know I can't say myView.frame.origin.x = val - But why ?

  - by Allisone

  I know that I can't use that myView.frame.origin.x = 25.0; that I have to use instead CGRect myFrame = myView.frame; myFrame.origin.x = 25.0; myView.frame = myFrame; And I'm doing it all the time (f.e. in animations), but I don't know why I must do it that way. I would like to fill that gap in my understanding. Can someone explain ?

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• What does "Controller Key" mean in Interface Builder > Inspector > Bindings?

  - by Thanks

  I can't find in the Docs where they explain all those fields and what they mean. Especially "Controller Key" is not clear to me.

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• Oracle multiset, collection and records

  - by Atul

  Can anybody Explain me why records are required. Can't we perform the same operation in pl/sql using loop and all. Also when multiset, records query can be used i.e. in which type of situation and which one will be the preference.

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• How are delegates in C# better than function pointers in C/C++?

  - by pecker

  The delegates in C# offer similar functionality as function pointers in C. I heard someone saying "C# delegates are actually better than function pointers in C". How come? Please explain with an example.

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• Inserting a line break from a variable objective c

  - by user337174

  I am pulling data into my iphone application using xml. The xml value is then placed in a variable. example variable: 123 London road \n London \n England The variable is then set as a label. I want the line breaks to appear in the label, instead it is printing \n. If i manually set the label value locationLabel.text = @"123 London road \n London \n England" It works as i want it to. Can anyone explain this?

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• How to get the time on the point that you click on the clock?

  - by Jeff

  For instance, when you click the clock on the screen, there will pop up a notification/dialog which displays the exact time point. Anyone can tell me how to achieve this function? Thanks in advance! Maybe I should explain the "exact time point" . For example, there is a big analog clock on the screen. When you click around the dial, it will pop up a dialog box to display the exact time.

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• Tkinter layout question

  - by directx

  Tricky to explain with words so I'll use a picture. A: row 0, column 0 B: row 0, column 1 C: row 1, column 0, span 2

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• Javascript: 'this' changes when assigning a property?

  - by Pickels

  I know 'this' can be a problem when you don't understand Javascript well but this one got me a little puzzled. var ControlTypes = { TextBox: function () { console.log(this); this.Name = "TextBox"; console.log(this); } } ControlTypes.TextBox(); Firebug gives the following result: Object {} Object { Name="TextBox"} The first object is ControlTypes and the second one is Textbox. Could anybody explain the behavior behind this?

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• Android String.equals doesn't work when I trying to match from httpresponse

  - by user469652

  RestClient.post("auth/login/", loginparam, new AsyncHttpResponseHandler() { @Override public void onSuccess(String s) { Toast.makeText(getApplicationContext(), String.valueOf(s.toLowerCase().equals("ok")), Toast.LENGTH_LONG).show(); if (s.equals("ok")) { startActivity(new Intent(getApplication(), HomeActivity.class)); } } }); This is the code I used for login in android app, In the Toast text, I can see the server did returned "ok", but s.equals always failed in my case, can someone explain that? Thank you.

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• IndexOf method returns 0 when it should had return -1 in C# / Java

  - by jcgarciam

  A friend of mine came to me with this strange behavior which i can't explain, any insight view would be appreciated. Im running VS 2005 (C# 2.0), the following code show the behavior int rr = "test".IndexOf(""); Console.WriteLine(rr.ToString()); the above code, print "0" which clearly show it should have return -1 This also happen in Java where the following Class show the behavior: public class Test{ public static void main(String[] args){ System.out.println("Result->"+("test".indexOf(""))); } } Im running Java 1.6.0_17

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• How can i get the source of a 777 - CHMOD php file?

  - by cedivad

  A moderator of a forum i own did so. I still can't belive on it, and i can't understand how he did it. Can someone explain me? He said he used only HTTP GET requests. Thanks

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• Why does trying to understand delegates feel like trying to understand the nature of the universe?

  - by Kin

  I've read two books, tons of examples. They still make next to no sense to me. I could probably write some code that uses delegates, but I have no idea why. Am I the only one with this problem, or am I just an idiot? If anyone can actually explain to me when, where, and why I would actually use a delegate, I'll love you forever.

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• Python regular expressions with more than 100 groups?

  - by Evan Fosmark

  Is there any way to beat the 100-group limit for regular expressions in Python? Also, could someone explain why there is a limit. Thanks.

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• Biztalk - how do I set up MSMQ load balancing and high availability ?

  - by FullOfQuestions

  Hi, From what I understand, in order to achieve MSMQ load-balancing, one must use a technology such as NLB. And in order to achieve MSMQ high-availability, one must cluster the related Biztalk Host (and hence the underlying servers have to be in a cluster themselves). Yet, according to Microsoft Documentation, NLB and FailOver Clustering technologies are not compatible. See this link for reference: http://support.microsoft.com/kb/235305 Can anyone PLEASE explain to me how MSMQ load-balancing and high-availability can be achieved? thank you in advance, M

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• How do I load an image from a DB inside a JSF page using managed beans?

  - by RhigoHR

  I have a database with some images. Could anyone explain me how I could load an image in a JSF page? I already have a managed bean that converts an Image object into a streamcontent. This streamcontent is called from the page in a tag <h:graphicImage>, but when I check the source code of the page, there's no src where the image could be loaded.

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• MVC deciding a View

  - by roneden

  I am deciding upon a view in my ASP.NET MVC scenario. How can Silverlight fit here? Please can you explain in detail and point to some examples.

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• i = true and false in Ruby is true?

  - by alex

  Am I fundamentally misunderstanding Ruby here? I've been writing Ruby code for about 2 years now and just today stumbled on this... ruby-1.8.7-p249 > i = true and false => false ruby-1.8.7-p249 > i => true Could somebody explain what's going on here please? I'm sure it's to spec, but it just seems counter intuitive to me...

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• Java Build Path - Add External JARs' and Add Variable

  - by Lakshman

  What is the difference between Java Build Path - Add External JARs Button and Add Variable Button Functionality, Why its required. Please explain in detail.

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• Nth Largest element from a table sql Query

  - by Binu

  can any one explain hiow this query works..It's for getting the Nth largest elemet from a table.here it's 4 th largest SELECT a.ID FROM tblitem a WHERE (4) = (select count(*) from tblItem b where b.id < a.id) Thanks in advance

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• When use GWT ensureInjected()

  - by user198313

  Hello there, I created a few styles into a CSSResource and it works well whether I use GWT.<MyResources>create(MyResources.class).myStyles().ensureInjected(); or not. Could anyone shed a light on this and explain when to use ensureInjected or not? Thank you! Daniel

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• stackoverflow : Adding image in question

  - by pavun_cool

  Hi All, I want to know , how to place the image in the stactoverflow question posting. Actually I have screenshot file which is output of my code. So I want show that image in my question from local file system. I tried with tag option , but it is asking me url of the image . Any one explain me.....

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