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• How to view the GDTR's value ?

  - by Mehdi Asgari

  Hi In the book "Rootkit Arsenal" page 84 (Chapter 3) mentions: ..., we can view the contents of the target machine's descriptor registers using the command with the 0x100 mask: kd rM 0x100 and a paragraph below: Note that the same task can be accomplished by specifying the GDTR components explicitly: kd r gdtr .... I run Windbg on my Win XP (inside VMWare) and choose the Kernel Debug - Local. My problem is in case of first command, windbg errors with: lkd rM 0x100 ^ Operation not supported in current debug session 'rM 0x100' and in the second command: lkd r gdtr ^ Bad register error in 'r gdtr' Can anyone guide me ?

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• Rotating Viewbox contents smoothly

  - by user204562

  I'm looking to teach myself better methods of doing things in WPF that I would normally do manually. In this case, I have a ViewBox with an image in it. I also have a button that uses a DoubleAnimation to rotate the image 90 to the right. This animation works fine, but obviously because it's square as it turns, the image does a "best fit" to the ViewBox which makes the rotation look quite bad, as it gets larger and smaller as its longest edge shrinks or grows to fit to that particular rotation angle. I am looking for any advice on the best way to handle this using appropriate WPF methods. Obviously I could do all the calculations manually, but I would be more interested in finding a way to use the controls and methods built into the .NET architecture. Thanks for your help.

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• Error in PHP with Mysql

  - by maltad

  Hello, Im starting to learn PHP. When I run the script it had an error that said: "Assigned Employee:resource(6) of type (mysql result)" . Please help me and sorry for my bad English Here is the code: include_once 'rnheader.php'; include_once 'rnfunctions.php'; echo ''; echo ' Assigned Employee:'; $query = "SELECT UserName FROM employee where Classification_ClassificationID = '2'"; $result = queryMysql($query); if (!queryMysql($query)) { echo "Query fail: $query" . mysql_error() . ""; } else { var_dump($result); exit; echo ''; // or name="toinsert[]" while ($row = mysqli_fetch_array($result)) { echo '' . htmlspecialchars($row['UserName']) . ''; } } echo ''; ?

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• Setting an empty default value for a char-column in MySQL?

  - by user281434

  Hi In phpMyAdmin I have a char(32) column that has no default value(ie. Default: None). When I try to insert data through a SQL query, it throws out an error saying that the column "doesn't have a default value". I need it to be empty, so instead I've just set it's default value as "As defined: " and then nothing in the value field. Is this a bad idea? And is it any better than simply throwing in an empty value for the column in the SQL query? Thanks for your time.

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• Safe way of iterating over an array or dictionary and deleting entries?

  - by mystify

  I've heard that it is a bad idea to do something like this. But I am sure there is some rule of thumb which can help to get that right. When I iterate over an NSMutableDictionary or NSMutableArray often I need to get rid of entries. Typical case: You iterate over it, and compare the entry against something. Sometimes the result is "don't need anymore" and you have to remove it. But doing so affects the index of all the rows, doesn't it? So how could I safely iterate over it without accidently exceeding bounds or jumping over an element that hasn't been checked?

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• If you had to work with horrible HTML, what would you do?

  - by Doug

  I was looking over some of my friend's HTML and CSS, and I was speechless (in a bad way). If I had to work with that, such as putting AJAX into it, then it would have been a lot of work. I would have to rebuild a lot of the HTML aspects, otherwise it wouldn't work well with the AJAX. What would you do in a situation like so? Would you just edit at the minimum? Would you do a overhaul and redo the whole HTML aspect? Would you go back to the client and ask for more money because it was a lot more work than expected? I'm interested in strategies and approaches and how it's done out in the field.

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• How can I create a single HTTP Get request for iPhone?

  - by Mph2

  Hi guys! First of all, sorry for my posibly bad english... I got a surely big stupid question... In my enterprise have an automatic door system, that is opened with a HTTP GET request to a file. Example: http://ipaddress/rc.cgi?o=1,50 Where the o=number indicates the amount of seconds that the automatic door will run. The is no need for authentification or nothing (that is made by LAN Radius). So, the question is... How can I make a single button (for example in the springboard) that when you touch it, runs the GET request? You thing that it should be possible with NSURLConection ? Thanks for all

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• Putting logic in ViewModel get'ers

  - by Yngvebn

  What do you think about putting Get-logic in the getters of a ViewModel? Something like: public class DummyViewModel { public int Id { get; set; } private DummyObject myObject; public DummyObject MyObject { get { if (MyObject == null) { DummyRepository repo = new DummyRepository(); myObject = repo.Get(Id); } return myObject; } } } Is this bad practice, or totally fine? I find my controllers getting really bloated by doing all the get-logic there, but I'm really torn as to where I should put it... My reason for doing it this way, is that I can pass the ViewModel to different types of view, and only the neccessary DB-lookup will be performed based on what property is requested.

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• Should I convert overly-long UTF-8 strings to their shortest normal form?

  - by Grant McLean

  I've just been reworking my Encoding::FixLatin Perl module to handle overly-long UTF-8 byte sequences and convert them to the shortest normal form. My question is quite simply "is this a bad idea"? A number of sources (including this RFC) suggest that any over-long UTF-8 should be treated as an error and rejected. They caution against "naive implementations" and leave me with the impression that these things are inherently unsafe. Since the whole purpose of my module is to clean up messy data files with mixed encodings and convert them to nice clean utf8, this seems like just one more thing I can clean up so the application layer doesn't have to deal with it. My code does not concern itself with any semantic meaning the resulting characters might have, it simply converts them into a normalised form. Am I missing something. Is there a hidden danger I haven't considered?

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• AS3: Performance question calling an event function with null param

  - by adehaas

  Lately I needed to call a listener function without an actual listener like so: foo(null); private function foo(event:Event):void { //do something } So I was wondering if there is a significant difference regarding performance between this and using the following, in which I can prevent the null in calling the function without the listener, but am still able to call it with a listener as well: foo(); private function foo(event:Event = null):void { } I am not sure wether it is just a question of style, or actually bad practice and I should write two similar functions, one with and one without the event param (which seems cumbersome to me). Looking forward to your opinions, thx.

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• crash happens when NSMutableArray is returned?

  - by senthilmuthu

  Hi, I have coded like that(that function will be called again and again), but the returned object gives "BAD ACCESS", the NSLog prints correct string, but toReturn sometimes(i called again and again) gives crashes..any help to alter this code - (NSMutableArray *)getAll:(NSString *)type { NSLog(@"Type: %@", type); NSMutableArray *toReturn = [[NSMutableArray alloc] initWithCapacity:0] ; rs = [db executeQuery:Query1]; while ([rs next]) { [toReturn addObject:[rs stringForColumn:@"Name"]]; NSLog(@"name: %@", [rs stringForColumn:@"Name"]); } [rs close]; return toReturn; }

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• How to remove seprator in tableView?

  - by AJPatel

  i make one tableview in which i add button type cell using custom cell.....looks good but when their is less cell in tableview at that time seprator looks very bad...... in design so thier is any solution than tell me............ i try to remove seprator from design but it not work.... Thanks in advance.......... - (void)viewDidLoad { self.navigationItem.title = @"My List"; self.tblView.separatorStyle = UITableViewCellSeparatorStyleNone; [[self tableView] setRowHeight:70]; [[self tableView] setBackgroundColor:[UIColor blackColor]]; Helath_ndroidAppDelegate *appDeleg = (Helath_ndroidAppDelegate *)[[UIApplication sharedApplication] delegate]; NSMutableArray *temp1 =[[NSMutableArray alloc] init]; appDeleg.recipCategoryFromDatabase = temp1; [temp1 release]; dataBase *objData = [[[dataBase alloc] init] autorelease]; [objData selectrecepFromDatabase]; [[self tableView] setSeparatorStyle:UITableViewCellSeparatorStyleSingleLineEtched]; [super viewDidLoad]; }

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• Functions without arguments, with unit as argument in scala

  - by scout

  def foo(x:Int, f:Unit=>Int) = println(f()) foo(2, {Unit => 3+4} //case1 def loop:Int = 7 foo(2, loop) //does not compile changing loop to //case 2 def loop():Int = 7 foo(2, loop) // does not compile changing loop to //case 3 def loop(x:Unit): Int = 7 //changing according to Don's Comments foo(2,loop) // compiles and works fine should'nt case 1 and case 2 also work? why are they not working? defining foo as def foo(x:Int, y:()=>Int) then case 2 works but not case 1. Arent they all supposed to work, defining the functions either way. //also i think ()=Int in foo is a bad style, y:=Int does not work, comments??

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• Actionscript 3.0 Get all instances of a class?

  - by Windbrand

  I got a ton of movieclips in a class. Is there a more efficient way to apply a function to every instance in the class other than this? var textArray:Array = [ interludes.interludeIntro.interludeBegin1, interludes.interludeIntro.interludeBegin2, interludes.interludeIntro.interludeBegin3, interludes.interludeIntro.interludeBegin4, interludes.interludeIntro.interludeBegin5, interludes.interludeIntro.interludeBegin6, interludes.interludeIntro.interludeBegin7, //... ... ... interludes.interludeIntro.interludeBegin15 ]; for each (var interludeText:MovieClip in interludeBeginText) { interludeText.alpha = 0 //clear all text first } Also for some reason this doesn't work: interludes.interludeIntro.alpha = 0; It permanently turns that class invisible, even if I try to make specific instances visible later with: interludes.interludeIntro.interludeBegin1.alpha = 1; I have NO idea why the above doesn't work. I want to turn every single instance in the class interludeIntro invisible, but I want to turn specific instances visible later. (btw I have no idea how to insert code on this website, pressing "code" doesn't do anything, so pardon the bad formatting)

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• Why i get this following error when using dir in Matlab?

  - by nata

  Matlab keep give me following error message : ??? Error using == dir Argument must contain a string. Error in == Awal at 15 x = dir(subDirs) Below is my codes : %MY PROGRAM clear all; clc; close all; %-----Create Database----- TrainDB = uigetdir('','Select Database Directory'); TrainFiles = dir(TrainDB); dirIndex = [TrainFiles.isdir]; [s subDirNumber] = size(dirIndex); for i = 3:subDirNumber subDirs = {TrainFiles(i).name}; subDirs = strcat(TrainDB,'\',subDirs); x = dir(subDirs) %<-------Error Here end Is something wrong with the codes? Your help will be appreciated. I'm sorry for my bad English.

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• What is an alternative to eval in this situation?

  - by CppLearner

  Many of my view functions do similar things. For the most part, they reverse to a different views upon clicking a button / a text link. So I wrote a helper function render_reverse def render_reverse(f, args): # args are all string type return eval('reverse(' + f + ', ' + args + ')' ) eval is a bad practice, and is pretty slow. It takes 3 seconds to start redirecting, whereas calling reverse directly takes less than 1 second to start redirecting. What alternative do I have? By the way, the function above doesn't work properly. I was modelling after this line (which works) eval('reverse("homepage", args=["abcdefg"])') Thanks.

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• How to rotate MXML component round its center like a wheel respectfully to mouse?

  - by Ole Jak

  So I have that panel or any other mxml component. I want somehow to rotate it around like a wheel of a car with which you drive it... loke a Racing wheel... sow like when mousebutton is down it captures pont of component... when you move mouse component rotates (not moves) according to new mouse position... How to rotate MXML component round its center like a wheel respectfully to mouse? welll feel free to edit this question because I know Ive formulated it in a bad way...

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• Searching in a TreeMap (Java)

  - by Kronen

  I need to do a search in a map of maps and return the keys this element belong. I think this implementation is very slow, can you help me to optimize it?. I need to use TreeSet and I can't use contains because they use compareTo, and equals/compareTo pair are implemented in an incompatible way and I can't change that. (sorry my bad english) Map m = new TreeSet(); public String getKeys(Element element) { for(Entry e : m.entrySet()) { mapSubKey = e.getValue(); for(Entry e2 : mapSubKey.entrySet()) { setElements = e2.getValue(); for(Element elem : setElements) if(elem.equals(element)) return "Key: " + e.getKey() + " SubKey: " + e2.getKey(); } } }

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• c++ - FIFO implementation

  - by Narek

  While implementing a FIFO I have used the following structure: struct Node { T info_; Node* link_; Node(T info, Node* link=0): info_(info), link_(link) {} }; I think this a well known trick for lots of STL containers (for example for List). Is this a good practice? What it means for compiler when you say that Node has a member with a type of it's pointer? Is this a kind of infinite loop? And finally, if this is a bad practice, how I could implement a better FIFO.

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• Is it a good design to return value by parameter?

  - by aztack

  bool is_something_ok(int param,SomeStruct* p) { bool is_ok = false; // check if is_ok if(is_ok) // set p to some valid value else // set p to NULL return is_ok; } this function return true and set p to a valid value if "something is ok" otherwise return false and set p to NULL Is that a good or bad design? personally, i feel uncomfortable when i use it. If there is no document and comment, i really don know how to use it. BTW:Is there some authoritative book/article about API design?

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• mysql_num_rows(): supplied argument is not a valid MySQL result resource

  - by php-b-grader

  I am getting this error when I pass an invalid SQL string... I spent the last hour trying to find the problem assuming - It's not my SQL it must be the db handle... ANyway, I've now figured out that it was bad SQL... What I want to do is test the result of the mysql_query() for a valid resultset. I am simply using empty($result)... Is this the most effective test? Is there a more widely accepted method of testing a resultset for a valid result?

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• AJAX Panel not throwing exceptions

  - by Grant

  Hi, i have just noticed something strange in some asp.net markup. I have a standard form with a couple of textboxes and a submit button. When clicked the code behind will attempt to perform some logic and then return. If the input values are not valid it used to throw an exception. The moment i wrapped the controls in an AJAX update panel and try to submit bad data, no exception is thrown and the panel returns like nothing was wrong. Does anyone know how to return this to the previous behavior whilst keeping the update panel?

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• what is the purpose of numeric/boolean/string objects as opposed to primitive values?

  - by zespri

  In javascript you can call a function as a function or as a constructor. For example you can do : myObject = new Number(13); myPrimitiveValue = Number(13); or simply myPrimitiveValue = 13; I understand the difference between the results. Can you explain me under which reasonable circumstances creating a number, a boolean or a string as an object is desirable? For example, ability to set new properties (this is something you can do on objects but can't really do on primitive values) is almost always a bad idea for objects containing number/boolean/string. Why would I want a numeric/boolean/string object?

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• The right way to setup VisualStudio 2010 for OpenCL

  - by LonliLokli

  what is the right way to setup VisualStuio 2010 for working with *.cl files? I have added *.cl under Tool/Text editor/File extensions and copied usertype.dat into the common7/ide folder, but VS underlines keywords like float4 or cross. Is it necessary to add some key in registry or can somebody propose a tutorial? Thanks in advance. PS i have already asked similar question old one question, but now i am looking explicit for a solution with vs2010. It is not bad, but really nerves and deflects me from programming tasks.

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• What is the best instance type to use for hosting a website on ec2?

  - by Josh

  Amazon offers two instance types on EC2: 1) On-Demand and 2) Reserved. After reading the docs on these, I don't really understand the difference from an end-user perspective. More specifically, I'd like to know the answer to this question: is one or the other better for web applications? Based on their names and descriptions, it seems as though on-demand instances may get wiped away from the server altogether if they're not in use which means that they need to be restarted when a request finally does come in. That seems like a pretty bad thing for a website. Am I just misinterpreting the docs? Thanks!

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