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• iPhone keyboard, Done button and resignFirstResponder

  - by nevan

  This is probably a dumb question, but I can't find the answer in the docs. Did the "Done" button on the pop-up keyboard always cause the keyboard to disappear? I see a lot of code around the web like this: - (BOOL)textFieldShouldReturn:(UITextField *)theTextField { [theTextField resignFirstResponder]; return YES; } When I press the "Done" button, the keyboard pops down and the UITextField resigns first responder. I'm presuming that pressing the "Done" button didn't used to cause a UITextField to resignFirstResponder, but that behavior changed at some time. I'm debugging on OS 3.0 - 3.1.3

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• Is it advisable to have non-ascii characters in the URL?

  - by Ravi Gummadi

  We are currently working on a I18N project. I was just wondering what are the complications of having the non-ascii characters in the URL. If its not, what are the alternatives to deal with this problem? EDIT (in response to Maxym's answer): The site is going to be local to specific country and I need not worry about the world wide public accessing this site. I understand that from usability point of view, It is really annoying. What are the other technical problem associated with this?

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• How does windows differentiate between regular exe and a .Net exe?

  - by Yogendra

  Hi All, This might be a duplicate entry. Excuse me if it is. I was asked in an interview as to how does Windows OS differentiate between regular exe and .Net exe. My reply was, when .Net exe is build, the compiler emits some information into the header. The information is PE32 or PE32+. windows verifies the header to determine if it needs to load the MSCOREE.dll which loads the CLR and executes the exe. I am not sure if my answer is correct ? Your inputs is appreciated.

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• Is the ruby operator ||= intelligent?

  - by brad

  I have a question regarding the ||= statement in ruby and this is of particular interest to me as I'm using it to write to memcache. What I'm wondering is, does ||= check the receiver first to see if it's set before calling that setter, or is it literally an alias to x = x || y This wouldn't really matter in the case of a normal variable but using something like: CACHE[:some_key] ||= "Some String" could possibly do a memcache write which is more expensive than a simple variable set. I couldn't find anything about ||= in the ruby api oddly enough so I haven't been able to answer this myself. Of course I know that: CACHE[:some_key] = "Some String" if CACHE[:some_key].nil? would achieve this, I'm just looking for the most terse syntax.

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• How to expose a constructor variable(sic!) as read-only?

  - by Malax

  Hi StackOverflow! I have this rather simple question about Scala. Given that i have to following class definition: class Foo(var bar: Int) The code which is able to construct an instance of Foo must be able to pass the initial value for bar. But if I define bar as var the User is also able to change its value at runtime which is not what I want. The User should only be able to read bar. bar itself is modified internally so a val is not an option. I think I might be getting an answer very soon as this question is so simple. :-) Cheers, Malax

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• How to stream a WAV file?

  - by jonasb

  I'm writing an app where I record audio and upload the audio file over the web. In order to speed up the upload I want to start uploading before I've finished recording. The file I'm creating is a WAV file. My plan was to use multiple data chunks. So instead of the normal encoding (RIFF, fmt , data) I’m using (RIFF, fmt , data, data, ..., data). The first issue is that the RIFF header wants the total length of the whole file, but that is of course not known when streaming the audio (I’m now using an arbitrary number). The other problem is that I'm not sure if it's valid since Audacity doesn't recognise the file, and Windows Media Player opens the file but plays only a very small part. I've been reading WAV specs but haven’t found an answer. Any suggestions?

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• Android Shopping App And SQLite

  - by Melih Mucuk

  I want to develop shopping app for android and it should works like tinypay.me Users can sign up and they sell items or buy items immediately. I need to database. I want to use SQLite but I don't find any answer to these questions: SQLite database files are stored on the user's phone, isn't it ? If it's true, here is the scenario: User logged in, then he/she wants to sells something on app. He/she creates ad and he/she published it on the app. These variables writing their database. When other users logged in, will they see this ad? If it's possible, how can sync database between users ? Thanks for attention.

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• Grabbing Data From Controls In Code Behind

  - by MKell43

  Hopefully this is a pretty simple question for someone to answer. I have a drop down list control that I need to pull the value from in the code behind of the page, modify it and redisplay it. The modifying and redisplaying I've got no problem with, it's grabing the value from the drop down control. Examples in C# would be appreciated as this web app I've been handed is already coded that way. I'm pretty new to .Net so be gentle and I already did some searching via Google and a little bit on the site here, but couldn't find anything that stood out as being the direction to go in to do this.

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• A 4-byte Unsigned Int for Sql Server 2008?

  - by Jeff Meatball Yang

  I understand there are multiple questions about this on SO, but I have yet to find a definitive answer of "yes, here's how..." So here it is again: What are the possible ways to store an unsigned integer value (32-bit value or 32-bit bitmap) into a 4-byte field in SQL Server? Here are ideas I have seen: 1) Use a -1*2^31 offset for all values Disadvantages: need to perform math on the values before reading/writing/aggregating. 2) Use 4 tinyint fields Disadvantages: need to concatenate values to perform any operations 3) Use binary(4) Disadvantages: actually uses 4 + 2 bytes of space

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• Unable to bind with any property of UserControl

  - by Agha Khan

  I looked your answer where I was also using this.DataContext=this. I am unable to convince myself why I have to remove it? But I did In my UserControl control I have 6 int properties (RedCount, GreenCount …) I am using .NET 3.5 and basically I wanted to use StringFormat with Binding. In my xaml file I have 6 Labels with I would like to bind, and I did what exactly you told in last reply. For some strange reasons it didn’t work. I don't know why it does not work. I placed break point in converter where I never hit it. This imples Binding failed.

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• Get controller method caller (3rd party webservice)

  - by bastijn

  Is it possible to retrieve the URL of a 3rd party webservice calling my controller method? Things like Request.Current.Url refer to my own URL (/someController/someAction/). The 3rd party webservice is sending HTTP POST data to my /someController/someAction and I wish to send back a HTTP POST message to the caller of the method, the 3rd party webservice, without using return Content["some response"] which will force me to exit the method. Since the answer is plain text I would like to send it using HTTP Post. What I actually try to do is respond to the calling webservice without exiting my method (return Content() will exit) so I can call other methods to process the data send to me by the webservice. I want to first tell the webservice I received their stuff and than process, in this way when a processing error occurs the webservice at least will not resend old data. Is there another way to do this than building your own HTTP post?

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• What is the precision of the priority field in sitemap.xml?

  - by Christoph

  Unfortunately the specification does not tell anything about precision. The xml scheme definition states that it is of the type xsd:decimal: <xsd:restriction base="xsd:decimal"> <xsd:minInclusive value="0.0"/> <xsd:maxInclusive value="1.0"/> </xsd:restriction> I have a sitemap generator that uses up to 10 positions after decimal point. Where often only the last few positions differ. These numbers are perfectly right according to the xsd, but yet i found some pages(3,4) that state that only 0.0, 0.1, 0.2, .., 1.0 are valid values. How will the search engines react to such a sitemap? Will some just round the value? I know that it is unlikely that someone can provide an answer to that question, unless he works for that search engine, but i think experiences will also do.

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• Adding and altering multiple text items to a Canvas -- what approach?

  - by philologon

  I am attempting to use a Canvas to create a simple Cad application. I have been able to get lines to draw as I want. For now the only other thing I need is text. The user should be able to edit the text in place. ?Is one of these better to use for this over the others? Rich Text TextBlock TextBox Label A more important question, though, is once I have chosen which class to use for implementation, how do I set and get the text value in code? Since the app is in essence a cad application, text will be added, deleted, and altered often, so I am not attempting to put these in XAML, but code-behind. That is why I am asking about how to do this in code. If the answer is "use X.SetValue()" (or that family of methods), then please tell me what I am supposed to do with the required DependencyProperty reference? TIA. Paul

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• calling a service from an activity

  - by newbie

  Hi,I have been stuck on this issue for quite some time now.Have read the documentation and many tutorials and they just confuse me more.I hope someone will provide me a straightforward answer.It's really important.Thank you.. Ok ..so i want an activity to get some input from the user as and then send that string to a service.Then i want my service to run in a way so that i can use other applications while this one keeps running in the background.Also i don't want the service to keep running every second.What i want is for the service to get updated location of my current position every 10 minutes so i was thinkin if there could be a way to make my service to go to sleep n wake up evry 10 mins n check for updates.I don't want to show the update on the UI so i dont think i need to use an AIDL approach and also dont need to bind to the service.I js simply want to start the service as soon as the user enters the string and keep the service runing every 10 mins.I think it is really simple but m very confused.Please help.

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• A good class structure for cleaning and using input?

  - by ciscoheat

  I want to be helpful to the users of a system, so I'll clean up the input a bit before testing if it can be used. So I have a flow like this: Input: aa12345b Clean input somehow: 12345 Test if clean input is valid Use input if valid Now I want to do this in a beautiful OO-fashion (IoC, interfaces, testable, no statics, you know). Any ideas how to organize a class structure for this? Is it good to have a Cleaner and a Parser/Validator class separately, or put them as methods in the data class itself? Thanks for any help or discussion about this, and extra thanks if the answer is in C#!

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• C optimization breaks algorithm

  - by Halpo

  I am programming an algorithm that contains 4 nested for loops. The problem is at at each level a pointer is updated. The innermost loop only uses 1 of the pointers. The algorithm does a complicated count. When I include a debugging statement that logs the combination of the indexes and the results of the count I get the correct answer. When the debugging statement is omitted, the count is incorrect. The program is compiled with the -O3 option on gcc. Why would this happen?

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• find a duplicate entry in an array in constant space and O(n) time [closed]

  - by Anubhav Agarwal

  Possible Duplicate: Algorithm to find a duplicate entry in constant space and O(n) time Given an array of N integer such that only one integer is repeated. Find the repeated integer in O(n) time and constant space. There is no range for the value of integers or the value of N For example given an array of 6 integers as 23 45 67 87 23 47. The answer is 23 (I hope this covers ambiguous and vague part) I searched on the net but was unable to find any such question in which range of integers was not fixed. Also here is an example that answers a similar question to mine but here he created a hash table with the highest integer value in C++.But the cpp does not allow such to create an array with 2^64 element(on a 64-bit computer).

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• Puzzle: find the minimum number of weights

  - by avd

  I came across this question: say given two weights 1 and 3, u can weigh 1,2 (by 3-1),3,4 (by 3+1). Now find the minimum number of weights so that you can measure 1 to 1000. So the answer was 1,3,9,27... I want to know how do you arrive at such a solution means powers of 3. What is the thought process? Source: http://classic-puzzles.blogspot.com/search/label/Google%20Interview%20Puzzles Solution: http://classic-puzzles.blogspot.com/2006/12/solution-to-shopkeeper-problem.html

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• Comparing Page.User.Identity.Name to value in sql Table

  - by Peggy Fusselman

  First, I am SO sorry if the answer is out there. I've looked and looked and feel this is such a simple thing that it should be obvious. I'm wanting to make sure only the person who added an event can modify it. Simple! I already have a datasource that has event_added_by as a data point. It is populating a FormView. SelectCommand="SELECT * FROM [tbl_events] WHERE ([event_ID] = @event_ID)" And I have Page.User.Identity.Name. How do I compare the two? I can't pull the value from the label in the FormView so I need to find another way. if (!IsPostBack) { string uname = Page.User.Identity.Name; string owner = ""// this is where I need to grab the value from dsEvents; if (uname != owner) { //Send them somewhere saying they're not allowed to be here } } TIA for any help!

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• How to create following table using MDX Scripting in Sql Server 2005?

  - by Itsgkiran

  Hi! I have the following table , Database Table: BatchID BatchName Chemical Value ---------------------------------------------- BI-1 BN-1 CH-1 1 BI-2 BN-2 CH-2 2 ---------------------------------------------- I need to display the following table. BI-1 BI-2 BN-1 BN-2 ----------------------------------------- CH-1 1 null ------------------------------------------ CH-2 null 2 ------------------------------------------ Here BI-1,BN-1 are two rows in a single columns i need to display chemical value as row of that.Could Please help me to solve this problem. I tried it in Pivot table but i unable to get this. So is there any chance in Reporting Server MDX. Could you please Answer this question. This is high priority to me . Thank You in advance.

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• How does the VS XAML designer know what to auto-populate certain values with?

  - by Pwninstein

  <Button Name="MyButton" Content="Test" FontStyle="Italic" /> In the above XAML definition of a button, the FontStyle property is set to Italic. The designer is somehow able to populate a list for me to choose from when I hit the = sign. How is this achieved? Before you answer, consider that the FontStyle property is, appropriately enough, of type FontStyle (which is a struct). It's not an enumeration, which would be trivial for VS to list out at design time, so how are the valid list of options chosen to be displayed? There is also a completely separate FontStyles class which contains three static fields, Italic, Normal, and Oblique which just so happen to be the three items VS provides in the drop down list. Is there some mapping going on behind the scenes between the FontStyle struct and FontStyles class, because I've looked in many places in both the object browser and in .NET Reflector and couldn't determine anything from either. Thanks!! I NEED to know!* *Not really, but it would be nice to :)

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• how to load a module within python debugger

  - by MK

  This looks like something simple but I could not find the answer so far - I have just learnt python and need to start learning pdb. In my module I have the usual if __name__ == __main_ trick to execute some code when the module is run as a program. So far I have been running it via python -m mymod arg1 arg2 syntax Now I want to do exactly the same thing from inside pdb. Normally in C, I would just do gdb mybinary followed by run arg1 arg2 But I cannot figure out how to achieve the same thing in pdb. I am sure there has to be a simple way to achieve this but it is taking me too long to search for it.. Thanks for your help!

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• Define a class dynamically?

  - by Pekka

  Is there a way to dynamically and conditionally create a class definition in PHP, i.e. if (condition matches) include file containing class definition else class myclass extends ancestor_class { .................... } without eval()? My background is the accepted answer to this question. I am looking for the best way to build a untouchable core library, with user-defined empty classes extending the core library if necessary. I want to create the final class definition "on the fly" if there is no user-defined empty class for a certain ancestor class.

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• Problem with Google AJAX Search API RESTful interface

  - by robert_d

  When I send the following query http://ajax.googleapis.com/ajax/services/search/local?v=1.0&q=coffee%20New%20York%20NY using c# WebClient.DownloadString function or ordinary web browser I get JSON data which is different from data for the same query using JavaScript and Google AJAX Search API. From REST service I get the following url field http://www.google.com/maps/place?source003duds0026q003dcoffee0026cid003d13245583795745066822 but from JavaScript query I get this url field http://www.google.com/maps/place?source=uds&q=coffee&cid=13245583795745066822 The problem with REST service answer is that the url it gives points to a web page with error message "We currently do not support the location". What am I doing wrong?

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• Why does it not allowed to use try-catch statement without {} ?

  - by alex

  Why can't I use code like this ? 1 int i = 0; try i = int.Parse("qwerty"); catch throw; 2 try i = int.Parse("qwerty"); catch; finally Log.Write("error"); And should write like this 1 int i = 0; try { i = int.Parse("qwerty"); } catch { throw; } 2 try { i = int.Parse("qwerty");} catch {} finally {Log.Write("error");} PS: I can use if-else statement without {}. Why should I use them with try-catch(-finally) statement ? Is there any meaningful reason ? Is it only because that some people think that code is hard to read ? Several months ago I asked that question on russian programming forum but I got no satisfactory answer ...

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