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• Date range advanced count calculation in TSQL

  - by cihata87

  I am working on call center project and I have to calculate the call arrivals at the same time between specific time ranges. I have to write a procedure which has parameters StartTime, EndTime and Interval For Example: Start Time: 11:00 End Time: 12:00 Interval: 20 minutes so program should divide the 1-hour time range into 3 parts and each part should count the arrivals which started and finished in this range OR arrivals which started and haven't finished yet Should be like this: 11:00 - 11:20 15 calls at the same time(TimePeaks) 11:20 - 11:40 21 calls ... 11:40 - 12:00 8 calls ... Any suggestions how to calculate them?

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• Print the next X number of lines in Scala

  - by soulesschild

  Trying to learn Scala using the Programming in Scala book and they have a very basic example for reading lines from a file. I'm trying to expand on it and read a file line by line, look for a certain phrase, then print the next 6 lines following that line if it finds the line. I can write the script easily enough in something like java or Perl but I have no idea how to do it in Scala (probably because I'm not very familiar with the language yet...) Here's the semi adapted sample code from the Programming in Scala book, import scala.io.Source if(args.length>0) { val lines = Source.fromFile(args(0)).getLines().toList for(line<-lines) { if(line.contains("secretPhrase")) { println(line) //How to get the next lines here? } } } else Console.err.println("Pleaseenterfilename")

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• using Eval in vb.net

  - by Bin_Zain

  hiii evryone.... i have small problem with my code in vb.net that i want to use (Eval) in my project so i write this code : <asp:Label ID="Label1" runat="server" Text='<%#Eval("PAG_PAGES") == null ? "" : ((PostAgenciesModel.PAG_PAGES)(Eval("PAG_PAGES"))).PAGE_TITLE_AR %>'></asp:Label> and this code i used in my C# project .... all want to show the (Label1) in insied my GridView.... ("PAG_PAGES") is the name of table.. PostAgenciesModel is the edmx... PAGE_TITLE_AR is the colum in ("PAG_PAGES") that i want to show it can anyone help plzzz thanxx

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• What would be my best MySQL Synchronization method?

  - by Kerry

  We're moving a social media service to be on separate data centers with global load balancing, as our other hosting provider's entire data center went down. Twice. This means that both websites need to be synchronized in some sense -- I'm less worried about the code of the pages, that's easy enough to sync, but they need to have the same database data. From my research on SO, it seems MySQL Replication is a good option, but the MySQL manual, for scaling out, says that its best when there are far more reads then there are writes/updates: http://dev.mysql.com/doc/refman/5.0/en/replication-solutions-scaleout.html In our case, it's about equal. We're getting around 200-300 thousand requests a day right now, and we can grow rapidly. Every request is both a read and write request. What would be the best method or tool to handle this?

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• Generic object load function for scala

  - by Isaac Oates

  I'm starting on a Scala application which uses Hibernate (JPA) on the back end. In order to load an object, I use this line of code: val addr = s.load(classOf[Address], addr_id).asInstanceOf[Address]; Needless to say, that's a little painful. I wrote a helper class which looks like this: import org.hibernate.Session class DataLoader(s: Session) { def loadAddress(id: Long): Address = { return s.load(classOf[Address], id).asInstanceOf[Address]; } ... } So, now I can do this: val dl = new DataLoader(s) val addr = dl loadAddress(addr_id) Here's the question: How do I write a generic parametrized method which can load any object using this same pattern? i.e val addr = dl load[Address](addr_id) (or something along those lines.) I'm new to Scala so please forgive anything here that's especially hideous.

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• How to safely remove a USB drive on Windows CE 5.0?

  - by Radu C

  Until today, I assumed that Windows CE was writing everything to disk and I wouldn't end up with a broken FAT16 when I removed the USB stick. Today, I was proven wrong. I use a USB stick to test things on a WinCE 5.0 device. I don't write anything from the app or WinCE to the stick. I just execute my app, and my app reads its settings and pictures from the stick. Today, just this order of operations broke my stick filesystem (and I have to fix it). Is there a way to tell WinCE 5.0 to unmount the stick before I remove it? It sees it as a "Hard Drive", and the tap-and-hold menu has nothing along the lines of "safely remove drive". I'm happy with both code to do this operation and some trick that I didn't find in Windows CE yet. Thank you.

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• connecting to multiple resources

  - by Dudu

  I would like to know if there is a way to connect to multiple resources: Specifically I have the following problem abstact class BaseClass { ObservableCollection<BaseClass>; } class GrandSonClass:BaseClass{} class SonClass:BaseClass{} class FatherClass:BaseClass { CollectionViewSource col = new CollectionViewSource ; col.Source = Items.SelectMany(p => p.Items); } FatherClass's Items are of ChildrenClass type, and ChildrenClass's Items are of GrandSonClass type; I want FatherClass to bind to all the GrandSonClass's items it possesses. The solution of using SelectMany is not good as I need this to be dynamically updated whenever FatherClass adds more Items and whenever its Items(SonClasses) add more Items. Now I could go on and write notifiaction events but I was wondering if there is a smarter way to do it -i.e. simply define the sources as the Items of each Item FatherClass posses

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• Questions Regarding Handling of Received SMS

  - by Edwin

  Hi, i have managed to successfully write a little test app that can receive and send SMS, but got a couple of questions. (That's 'cos part of the code i copied from elsewhere and i would like to understand better). In my AndroidManifest as well as the sub-class of BroadcastReceiver, there is reference to the string literal "android.provider.Telephony.SMS_RECEIVED". However, i couldn't find any reference in the API that mentions this. Could someone point me to some reference that lists/explains these? As part of getting the message from the Intent, i did this: Object[] pdus = (Object[]) intent.getExtras().get("pdus"); Again this question is related to the use of hardcoded string literal. Where is the string "pdus" listed and described? Thanks in advance!

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• Extract data from uint8 to double

  - by HADJ AMOR HASSEN

  I have a C function receiving a uint8 pointer with another parameter which is its size (number of bytes). I want to extract double data from this buffer. Here is my code: Write(uint8* data, uint8 size) /* data and size are given by a callback to my function)*/ { double d; for (i = 0; i < size; i++) { d = ((double*)&data)[i]; printf(" d = %d\n"); } } The problem is that I am not receiving what I am sending within an external hardware. I guess that my cast is wrong. I tried other methods but without any good result. I am still not able to get what I send.

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• How to find hidden properties/methods in Javascript objects?

  - by ramanujan

  I would like to automatically determine all of the properties (including the hidden ones) in a given Javascript object, via a generalization of this function: function keys(obj) { var ll = []; for(var pp in obj) { ll.push(pp); } return ll; } This works for user defined objects but fails for many builtins: repl> keys({"a":10,"b":2}); // ["a","b"] repl> keys(Math) // returns nothing! Basically, I'd like to write equivalents of Python's dir() and help(), which are really useful in exploring new objects. My understanding is that only the builtin objects have hidden properties (user code evidently can't set the "enumerable" property till HTML5), so one possibility is to simply hardcode the properties of Math, String, etc. into a dir() equivalent (using the lists such as those here). But is there a better way?

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• LINQ query with specified number of rows in a subquery problem

  - by John

  I'm trying to write the following query in LINQ, but can't seem to get it correct. select p.* from Person p inner join PersoniPhones i ON p.PersonID = i.PersonID where p.PersonID in ( SELECT PersonID FROM ( SELECT Top 10 PersonID, iPhoneID FROM iPhone ORDER BY LastPlayedDate DESC ) as t ) I've tried the following, but it doesn't return correctly var tenIPhones = from i in context.PersonIPhones .OrderByDescending(i => i.LastPlayedDate) .Take(minNumQuestions) select new { i.PersonID, i.IPHoneID}; var people = from p in context.Person join t in tenIPhones on p.PersonID equals t.PersonID select p; Any ideas?

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• if then endif , other smart solution in place of if then ....

  - by yael

  I have the following VB script How to write this VB script with case syntax? In order to perform professional writing in place if then…. yael Set fso = CreateObject("Scripting.FileSystemObject") If (fso.FileExists("C:\file1 ")) Then Verification=ok Else WScript.Echo("file1") Wscript.Quit(100) End If If (fso.FileExists("C:\file2 ")) Then Verification=ok Else WScript.Echo("file2") Wscript.Quit(100) End If If (fso.FileExists("C:\file3 ")) Then Verification=ok Else WScript.Echo("file3") Wscript.Quit(100) End If . . . .

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• Haskell, list of natural number

  - by Hellnar

  Hello, I am an absolute newbie in Haskell yet trying to understand how it works. I want to write my own lazy list of integers such as [1,2,3,4,5...]. For list of ones I have written ones = 1 : ones and when tried, works fine: *Main> take 10 ones [1,1,1,1,1,1,1,1,1,1] How can I do the same for increasing integers ? I have tried this but it indeed fails: int = 1 : head[ int + 1] And after that how can I make a method that multiplies two streams? such as: mulstream s1 s2 = head[s1] * head[s2] : mulstream [tail s1] [tail s2]

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• Python read files in directory and concatenate

  - by JJ Beck

  I want to write a Python script that searches all folders in the current directory, looks for all .txt files, and creates a file that is a concatenation of all those files (in any order) in the current directory. If folders have subfolders, it should not search those subfolders. An example is main_folder folder_1 sub_folder file1.txt file2.txt folder_2 file3.txt The script is placed inside main_folder. It should create a file that is a concatenation of file2.txt and file3.txt (in any order) inside main_folder. My question is: How can I tell Python to traverse through the folders, look for .txt files, without going into the subfolders?

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• Get file size of BufferedImage before writing the data

  - by David

  I'm working on a Java program that needs to send an image (preferably in PNG format, though I could perhaps use another format if necessary) over the network. The logical way to do this is, of course, to first send the length of the PNG image data, then the data itself. Problem: I don't see any method in ImageIO or anywhere else that will give me the length of the image data. Does this exist somewhere in the Java 1.6 standard library? I know I could just write it to a ByteArrayOutputStream and get the length of the resulting array, but before resorting that I wanted to make sure I'm not missing something built in. And besides, that makes an extra copy of the image data, which I'd rather not do if it's not necessary.

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• MVC 2 ViewContenxt. Writer doesn't exist in MVC 1?

  - by DaveDev

  I had the following code in an ASP.NET MVC 2 application. internal TextWriter _writer; // some stuff _writer = _viewContext.Writer; _writer.Write(_tag.ToString(TagRenderMode.EndTag)); I tried to move it to MVC 1 & now it doesn't build any more. I'm getting this error: 'System.Web.Mvc.ViewContext' does not contain a definition for 'Writer' Can someone point out how I can resolve this? Thanks.

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• How to print size_t variable portably?

  - by ArunSaha

  I have a variable of type size_t, and I want to print it using printf(). What format specifier do I use to print it portably? In 32-bit machine, %u seems right. I compiled with g++ -g -W -Wall -Werror -ansi -pedantic, and there was no warning. But when I compile that code in 64-bit machine, it produces warning. size_t x = <something>; printf( "size = %u\n", x ); warning: format '%u' expects type 'unsigned int', but argument 2 has type 'long unsigned int' The warning goes away, as expected, if I change that to %lu. The question is, how can I write the code, so that it compiles warning free on both 32- and 64- bit machines? Edit: I guess one answer might be to "cast" the variable into an unsigned long, and print using %lu. That would work in both cases. I am looking if there is any other idea. (C, C++)

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• Why does this Javascript work in FF3.6? new Date("2010-06-09T19:20:30+01:00");

  - by thegaw

  Here's the sample code: var d = new Date("2010-06-09T19:20:30+01:00"); document.write(d); On FF3.6 this will give you: Wed Jun 09 2010 14:20:30 GMT-0400 (EST) Other browers tested; Chrome 5, Safari 4, IE7 give: Invalid Date I know there is limited to no support for ISO8601 dates, but does anyone know what and/or where the difference is in FF3.6 that allows this to work? My thought is that FF is just stripping out what it doesn't understand while the others are not. Has anyone else seen this and/or getting different results from the test script?

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• Constructors with inheritance in c++

  - by Crystal

  If you have 3 classes, with the parent class listed first shape- 2d shapes, 3d shapes - circle, sphere When you write your constructor for the circle class, would you ever just initialize the parent Shape object and then your current object, skipping the middle class. It seems to me you could have x,y coordinates for Shape and initialize those in the constructor, and initialize a radius in the circle or sphere class, but in 2d or 3d shape classes, I wouldn't know what to put in the constructor since it seems like it would be identical to shape. So is something like this valid Circle::Circle(int x, int y, int r) : Shape(x, y), r(r) {} I get a compile error of: illegal member initialization: 'Shape' is not a base or member So I wasn't sure if my code was legal or best practice even. Or if instead you'd have the middle class just do what the top level Shape class does TwoDimensionalShape::TwoDimensionalShape(int x, int y) : Shape (x, y) {} and then in the Circle class Circle::Circle(int x, int y, int r) : TwoDimensionalShape(x, y), r(r) {}

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• getting the names of elements in JS/jQuery

  - by Mala

  I have some checkbox inputs like so: <input type="checkbox" name="1" class="filter"/> <input type="checkbox" name="2" class="filter"/> ...etc... I'm trying to write a function where any time a checkbox is selected, it generates a string with all the names concatenated. Here's what I have so far: $('.filter').click(function(event){ var filters = $('.filter').toArray(); var fstr = ""; for (f in filters) { fstr = fstr+","+f.name; } alert(fstr); }); The names keep coming up as 'undefined', though (i.e. the alert returns ,undefined,undefined,undefined,undefined,undefined,undefined). How do I access the names?

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• How can I use a pre-populated core data DB on my device.

  - by KingAndrew

  Hi all, I have developed my app using core data. It works fine in the simulator. When I deploy it to the device the DB is empty. It is 49k where it should be 484k. Basically it is not populated. Since I don't write to the DB when the app is running I need to provide a populated DB to the App. So I copied the populated DB from the simulator to resources and then deploy. Still no luck. the populated DB is in MyApp.app and the AppDelegate is reading from the Documents directory. How do I either get it in the documents directory or get the app delegate to look in the app? Thanks in advance, Andrew

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• What's the syntax to import a class in a default package in Java?

  - by Lord Torgamus

  Possible Duplicate: How to access java-classes in the default-package? Is it possible to import a class in Java which is in the default package? If so, what is the syntax? For example, if you have package foo.bar; public class SomeClass { // ... in one file, you can write package baz.fonz; import foo.bar.SomeClass; public class AnotherClass { SomeClass sc = new SomeClass(); // ... in another file. But what if SomeClass.java does not contain a package declaration? How would you refer to SomeClass in AnotherClass?

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• Possible to convert list of #defines into strings (C++)

  - by brandonC

  Suppose I have a list of #defines in a header file for an external library. These #defines represent error codes returned from functions. I want to write a conversion function that can take as an input an error code and return as an output a string literal representing the actual #define name. As an example, if I have #define NO_ERROR 0 #define ONE_KIND_OF_ERROR 1 #define ANOTHER_KIND_OF_ERROR 2 I would like a function to be able to called like int errorCode = doSomeLibraryFunction(); if (errorCode) writeToLog(convertToString(errorCode)); And have convertToString() be able to auto-convert that error code without being a giant switch-case looking like const char* convertToString(int errorCode) { switch (errorCode) { case NO_ERROR: return "NO_ERROR"; case ONE_KIND_OF_ERROR: return "ONE_KIND_OF_ERROR"; ... ... ... I have a feeling that if this is possible, it would be possible using templates and metaprogramming, but that would only work the error codes were actually a type and not a bunch of processor macros. Thanks

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• List filtering: list comprehension vs. lambda + filter

  - by Agos

  I happened to find myself having a basic filtering need: I have a list and I have to filter it by an attribute of the items. My code looked like this: list = [i for i in list if i.attribute == value] But then i thought, wouldn't it be better to write it like this? filter(lambda x: x.attribute == value, list) It's more readable, and if needed for performance the lambda could be taken out to gain something. Question is: are there any caveats in using the second way? Any performance difference? Am I missing the Pythonic Way™ entirely and should do it in yet another way (such as using itemgetter instead of the lambda)? Thanks in advance

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• isAlive problem..Help to understand how it works

  - by max

  I get this error: "non-static method isAlive() cannot be referenced from a static context" what's wrong with this code..please. I'd like to detect if the thread is alive... Any help in terms of code will be highly appreciated..thanks max class RecThread extends Thread { public void run() { recFile = new File("recorded_track.wav"); // Output file type AudioFileFormat.Type fileType = null; fileType = AudioFileFormat.Type.WAVE; // if rcOn =1 thread is alive int rcOn; try { // starts recording targetDataLine.open(audioFormat); targetDataLine.start(); AudioSystem.write(new AudioInputStream(targetDataLine), fileType, recFile); if (RecThread.isAlive() == true) { rcOn =1; } else { rcOn =0; } } catch (Exception e) { showException(e); } // update actions recAction.setEnabled(true); stopRecAction.setEnabled(false); } }

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