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  • How to find the largest power of 2 less than the given number

    - by nazar_art
    I need to find the largest power of 2 less than the given number. And I stuck and can't find any solution. Code: public class MathPow { public int largestPowerOf2 (int n) { int res = 2; while (res < n) { res =(int)Math.pow(res, 2); } return res; } } This doesn't work correctly. Testing output: Arguments Actual Expected ------------------------- 9 16 8 100 256 64 1000 65536 512 64 256 32 How to solve this issue?

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  • updating a properties file in a web application

    - by AmiraGL
    i have a properties file (under rsources folder) in which i'm stocking a variable (key=value), i need to update it when a user insert a new value or update the older one , so can i do it ? i have doubts because it's a web application so it' simply a war deployed in the server so how it is possible to access the .properties file and change it directly from the code . if it's not possible is there another solution ? Any Help will be apprecited Many thanks

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  • argument promotions in C function calls

    - by HaoCheng
    I learned from ----As to when default promotions kick in: default argument promotions are used exactly when the expected type of the argument is unknown, which is to say when there's no prototype or when the argument is variadic. But an example confusing me is: void func(char a, char b) { printf("a=%p,b=%p\n",&a,&b); } int main(void) { char a=0x11,b=0x22; func(a,b); return 0; } It is cleard in the above example: when calling func in main, there is no need to promote the arguments a and b, but the output shows &a = &b +4 not &a = &b+1. If no promotion occured, why 4 bytes between two CHAR argument?

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  • How can I ensure that nested transactions are committed independently of each other?

    - by Caldera
    If I have a stored procedure that executes another stored procedure several times with different arguments, is it possible to have each of these calls commit independently of the others? In other words, if the first two executions of the nested procedure succeed, but the third one fails, is it possible to preserve the results of the first two executions (and not roll them back)? I have a stored procedure defined something like this in SQL Server 2000: CREATE PROCEDURE toplevel_proc .. AS BEGIN ... while @row_count <= @max_rows begin select @parameter ... where rownum = @row_count exec nested_proc @parameter select @row_count = @row_count + 1 end END

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  • What is the most robust way of determining the current codepage from a shell script?

    - by rewbs
    Hi all, I'd like to determine the environment's current codepage at runtime from a Unix shell script. What's the most reliable way of doing this? I'm looking into parsing environment variable $LC_ALL, but it isn't always set to a useful value, and its format seems to vary (can be <locale, or <locale.<code page, or <locale.<code page@<modifier etc...). Is there a better way? I'm essentially after a shell equivalent of what I'd get if I called nl_langinfo(CODESET) from C.

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  • Perl Substitution

    - by Marlin
    hi, I have a variable which stores the path on Windows. I want to replace all the \ with / in the path. for eg. $path = C:\Users\scripts.ps1 Am new to Perl and tried something like $path = s/\//// But it didnt work. can you please help me out....

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  • Do you know of some performances test of the different ways to get thread local storage in C++?

    - by Vicente Botet Escriba
    I'm doing a library that makes extensive use of a thread local variable. Can you point to some benchmarks that test the performances of the different ways to get thread local variables in C++: C++0x thread_local variables compiler extension (Gcc __thread, ...) boost::threads_specific_ptr pthread Windows ... Does C++0x thread_local performs much better on the compilers providing it?

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  • Extract dates from filename(C#3.0)

    - by Newbie
    I have a situation where I need to extract dates from the file names whose general pattern is [filename_]YYYYMMDD[.fileExtension] e.g. "xxx_20100326.xls" or x2v_20100326.csv The below program does the work //Number of charecter in the substring is set to 8 //since the length of YYYYMMDD is 8 public static string ExtractDatesFromFileNames(string fileName) { return fileName.Substring(fileName.IndexOf("_") + 1, 8); } Is there any better option of achieving the same? I am basically looking for standard practice. I am using C#3.0 and dotnet framework 3.5 Thanks

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  • sending data from appcontroller to default.ctp - CakePHP

    - by Astral Projection Forum
    I want to send the below data to default.ctp, I want to display menus in all the pages, I'm using Auth, The problem is if I'm logged in I get the Menus correctly, but if I logout, I'm getting error saying variable'$topMenu' not found. The MenuController can be accessed only if logged in. $this->loadModel('Menu'); $this->set('topMenu',$this->Menu->find('all')); Any help on how to solve this?

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  • Cannot send e-mail with rails 2.3.4(I could with 2.3.2)

    - by Brian Roisentul
    I'm working with ruby on rails 2.3.4 and I yesterday I found out I cannot send emails any more. The email-related credentials are ok because I could send emails until I upgraded my rails version about two weeks ago. The error message I get is the following: ArgumentError in UsersController#create wrong # of arguments(3 for 2) D:/Proyectos/Cursometro/www/vendor/plugins/action_mailer_tls/lib/smtp_tls.rb:8:in `check_auth_args' D:/Proyectos/Cursometro/www/vendor/plugins/action_mailer_tls/lib/smtp_tls.rb:8:in `do_start' C:/Program Files (x86)/NetBeans 6.8/ruby2/jruby-1.4.0/lib/ruby/1.8/net/smtp.rb:525:in `start' C:/Program Files (x86)/NetBeans 6.8/ruby2/jruby-1.4.0/lib/ruby/gems/1.8/gems/actionmailer-2.3.4/lib/action_mailer/base.rb:682:in `perform_delivery_smtp' C:/Program Files (x86)/NetBeans 6.8/ruby2/jruby-1.4.0/lib/ruby/gems/1.8/gems/actionmailer-2.3.4/lib/action_mailer/base.rb:523:in `deliver!' C:/Program Files (x86)/NetBeans 6.8/ruby2/jruby-1.4.0/lib/ruby/gems/1.8/gems/actionmailer-2.3.4/lib/action_mailer/base.rb:395:in `method_missing' D:/Proyectos/Cursometro/www/app/models/user_observer.rb:3:in `after_create' D:/Proyectos/Cursometro/www/app/controllers/users_controller.rb:221:in `create_new_user' D:/Proyectos/Cursometro/www/app/controllers/users_controller.rb:101:in `create' Please, help!

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  • Why the generated key size is not constant?

    - by Tom Brito
    The following code prints randomly 634, 635, 636, each time I run it. Why its not constant? public static void main(String[] args) throws Exception { KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA", "BC"); keyPairGen.initialize(1024); RsaKeyPair keyPair = new RsaKeyPair(keyPairGen.generateKeyPair()); System.out.println(keyPair.getPrivate().getEncoded().length); }

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  • Xml with spaces as InnerText

    - by David Rutten
    I'm parsing Xml data which has entries like this: <item name="UserText" type_name="gh_string" type_code="10"> </item> I'm supposed to read the 6 spaces as a String, but both the InnerText and InnerXml values of the System.Xml.XmlNode are zero length Strings. Is there any way I can get at this whitespace data in existing files and what do I need to do in the future to prevent this sort of screw up?

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  • & symbol problem in htaccess

    - by muralikalpana
    hello.... my current url is categories_name.php?cname=at&t rewritten url like this. carriers/at&t this is htaccess url. RewriteRule ^carriers/(.*)$ categories_name.php?cname=$1 [L] above url is working for all like categories_name.php?cname=all-tel when variable(at&t) has '&' symbol then problem occuring. so how to write htaccess url?

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  • Weird constants

    - by Quassnoi
    I've seen these in real code: #define SCREEN_DIMENSIONS 2 #define THREE_THOUSAND_FIVE_HUNDRED_TWENTY_TWO 3522 What is the weirdest constant you've ever seen? P. S. And of course my favorite in JScript: bool b; switch (b.ToString().length) { case 4: // true ... break; case 5: // false ... break; )

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  • Is it safe to modify CCK tables by hand?

    - by LanguaFlash
    I'm not intimately familiar with CCK but I have a one-time custom setup and know that I could get some performance gains if I created indexes and changed the field type and length of some of the fields in my CCK table. Is it save to modify this table at all or will I end up destroying something in the process? Thanks

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  • Printing values of all fields in C++ structure

    - by Zhinkaas
    Say a simple structure struct abc { int a; char b; } I got some value in a variable defined as its structure and now I want to print below a = [some value] b = [some character] What is the best way to achieve this for an arbitrary structure without having to write a dump...(...) function for each of the structure I encounter?

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  • Workflow for reading and writing files

    - by AIR_PhillipSenn
    In Workflow for reading and writing files the authors use these two lines of code: var file = air.File.documentsDirectory; file = file.resolvePath("AIR Test/testFile.txt"); But I think that it's using one variable for two different meanings, isn't it? Wouldn't it be better to write them as: var myDocumentsDirectory = air.File.documentsDirectory; var myTestFile = myDocumentsDirectory.resolvePath("AIR Test/testFile.txt");

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  • Creating an instance within the Class itself

    - by didxga
    What's going on when the assignment statement executed at Line 4, does compiler ignore the new operator and keep the foo variable being null or something else happen to handle this awkward moment? public class Foo { // creating an instance before its constructor has been invoked, suppose the "initializing" // gets printed in constructor as a result of the next line, of course it will not print it private Foo foo = new Foo();//Line 4 public Foo() { System.out.println("initializing"); } }

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  • Answered: Selecting even table rows from a table element

    - by mvrak
    The issue I am having is: How do I go from a variable pointing at an element to using CSS selectors? I want to make this work: function highlight(table) {$(table " > :even").toggleClass('highlight');} where table is a reference to a table element. I don't want answers that tell me to use $('#table') because that defeats the point of the generality I am trying to make. Thanks

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  • string and z-depth animation, as3

    - by VideoDnd
    How do I pass this string to my children? formatCount(fcount) is the value I'm trying to pass to children timer is the value the children are recieving now Timer that loops through an array of displayObjects var timer:Timer = new Timer(100); var count:int = 0; var fcount:int = 0; timer.addEventListener(TimerEvent.TIMER, countdown); function countdown(event:TimerEvent) { count++; fcount=int(count*count/1000); //myText.text = formatCount(fcount); //LOOPS THROUGH MY LIST ITEMS 'see array at bottom' var currentFrame:int = timer.currentCount % frames.length; for (var i:int = 0; i < frames.length; ++i) { frames[i].visible = (i == currentFrame); } } timer.start(); //SUBSTRING AND ZERO PLACEHOLDER function formatCount(i:int):String { var fraction:int = i % 100; var whole:int = i / 100; return ("0000000" + whole).substr(-7, 7) + "." + (fraction < 10 ? "0" + fraction : fraction); } //PASS MATH TO SPRITE HANDLER function spriteHandler(e:Event):void { numbers.setTime(formatCount(fcount)); } //LOST ARGUMENT==>GOES TO NUMBERSVIEW //var numbers:NumbersView; var numbers:*; //MY ARRAY 'list of numbers, one-to-zero' var frames:Array = [new Frame1(),new Frame2(),new Frame3(), new Frame4(),new Frame5(),new Frame6(),new Frame7(),new Frame8(),new Frame9(), new Frame0()]; for each (var frame:Sprite in frames) { addChild(frame); } Example of NumbersView 'increment and place display objects across the stage' function NumbersView() { _listItems = new Array(); previousNums = new Array(); var item:NumberImage; for (var i:Number = 0; i <= 9; i++) { item = new NumberImage(); addChild(item); item.x = i * item.width; _listItems.push(item); } }

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  • Using MCPKit framework in Cocoa app.

    - by pawz
    I'm trying to integrate the MCPKit MySQL framework available at http://mysql-cocoa.sourceforge.net/ into my cocoa application. I've added the framework and included the header file but when I try to define my first MCPConnection variable it says "MCPConnection undeclared". Is anyone successfully using MCPKit on leopard ? Or is there another framework that people use to access MySQL ?

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  • How to project an ASP Classic Page?

    - by SH
    How to project an ASP Classic page with either HTTP AUTH (you must provide a username and password to OrderGroove) or a randomly generated access key that will be included as one of the parameters of the HTTP POST using the variable name access_key. Can anybody provide asp classic code in this regard? Quick help will be appreciated...

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