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• How do I limit the posible options to be assign to a .net property

  - by carlos

  Hello how can I have like a catalog for a property in .net VB .. I mean if i have Property funcion(ByVal _funcion As Int16) As Int16 Get Return _funcion End Get Set(ByVal value As Int16) _funcion = value End Set End Property I want to be able to assign to this property a limited number of options. Example .. Dim a as trick (the class ) a.funcion = (and get a list of possible attributes) ... Thanks !!!

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• (PHP) 1)How to genrate Secreate key on User & Client Side ? 3) How to Compare Server side MD5 and Client side Md5 ?

  - by user557994

  /* In Below Code .. My problem is that 1) How to genrate Secreate key on User Side ? 2) How to genrate Secreate key on Client Side ? 3) How to Compare Server side MD5 and Client side Md5 ? Can you solve my problem ? */ $gid = $_GET['id']; if($gid=="") { $filename = "counter.txt"; $fp = fopen( $filename, "r" ) or die("Couldn't Generate Whiteboard"); while ( ! feof( $fp ) ) { $countfile = fgets( $fp); $countfile++; } fclose( $fp ); $fp = fopen( $filename, "w" ) or die("Couldn't generate whiteboard"); fwrite( $fp, $countfile ); fclose( $fp ); $doc = new DOMDocument('1.0', 'UTF-8'); $ele = $doc-createElement( 'root' ); $ele-nodeValue = $uvar; $doc-appendChild( $ele ); $test = $doc-save("$countfile.xml"); genkey($id); echo ""; $uvar=$_POST['msgval']; exit; } else { if($uvar == "") { $xdoc = new DOMDocument( '1.0', 'UTF-8' ); $xdoc-Load("$gid.xml"); $candidate = $xdoc-getElementsByTagName('root')-item(0); $newElement = $xdoc -createElement('root'); $txtNode = $xdoc -createTextNode ($root); $newElement - appendChild($txtNode); $candidate - appendChild($newElement); $msg = $candidate-nodeValue; } } function genkey($id) { $encrypt_key = "GJHsahakst1468464a"; $key = MD5("$id","$$encrypt_key"); return $key; } ? function sendRequest() { var uvar = document.getElementById('txtHint').value; var xmlhttp = new XMLHttpRequest(); xmlhttp.onreadystatechange = function() { if(xmlhttp.readyState == 4 && xmlhttp.status==200) { document.getElementById('txtHint').value = ""; } } xmlhttp.open("POST","post.php?id=",true); xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded"); xmlhttp.send("umsg="+uvar); return; } Msg " /

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• navigation controller upon a view in iPhone

  - by suse

  hello, I would create a view programitically , then Can i place the navigation controller upon a view by making the view as rootview? and then return the rootview to the window object in Objective-C for iPhone programming. Is this possible?

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• linq subquery child collection to string

  - by bill

  Hi All, i am trying to figure out how to write a linq query that will return a child collections "name" property as a string. I have a BO that has a "options" property where the options are the "name" property of each option in an "order" object. I would like the result to look something like order.id = 12312 order.date = 12/03/10 order.options = "Option 1 Name, Option 2 Name, Option 3 Name" I hope this makes sense. thanks for any and all help!

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• how to make a thread of never stop, and write something to database every 10 second..

  - by zjm1126

  i using gae and django this is my code: class LogText(db.Model): content = db.StringProperty(multiline=True) class MyThread(threading.Thread): def __init__(self,threadname): threading.Thread.__init__(self, name=threadname) def run(self,request): log=LogText() log.content=request.POST.get('content',None) log.put() def Log(request): thr = MyThread('haha') thr.run(request) return HttpResponse('')

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• [solved] call_user_func_array problems

  - by Knarf

  I have a class with this in self::$DB = new PDO("mysql:dbname=$dbname;host:=127.0.0.1" , 'root' , ''); and then this public static function __callStatic($name, $arguments) { return call_user_func_array(array('self::$DB', $name), $arguments); } How does I make it right/work?

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• Rewriting simple C# nested class

  - by Daniel

  What would be an elegant way to implement the functionality of this nested class in F#? private class Aliaser { private int _count; internal Aliaser() { } internal string GetNextAlias() { return "t" + (_count++).ToString(); } } This was my first attempt, but it feels like there should be a sexy one-liner for this: let aliases = (Seq.initInfinite (sprintf "t%d")).GetEnumerator() let getNextAlias() = aliases.MoveNext() |> ignore aliases.Current

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• [php] call_user_func_array problems

  - by Knarf

  I have a class with this in self::$DB = new PDO("mysql:dbname=$dbname;host:=127.0.0.1" , 'root' , ''); and then this public static function __callStatic($name, $arguments) { return call_user_func_array(array('self::$DB', $name), $arguments); } How does I make it right/work? Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'self::$DB' not found in D:\Mine Dokumenter\My Dropbox\www\Framework 3\database.class.php on line 19

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• C# BestPractice: Private var and Public Getter/Setter or Public Var

  - by Desiny

  What are the advantages and differences between the below two coding styles... public void HelloWorld () { private string _hello; public string Hello { get { return _hello; } set { _hello = value; } } } or public void HelloWorld () { public string Hello { get; set; } } My preference is for short simple code, but interested to hear opinions as I see many developers who insist on the long route.

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• Need advice about pointers and time elapsed program. How to fix invalid operands and cannot convert errors?

  - by user1781382

  I am trying to write a program that tells the difference between the two times the user inputs. I am not sure how to go about this. I get the errors : Line 27|error: invalid operands of types 'int' and 'const MyTime*' to binary 'operator-'| Line |39|error: cannot convert 'MyTime' to 'const MyTime*' for argument '1' to 'int DetermineElapsedTime(const MyTime*, const MyTime*)'| I also need a lot of help in this problem. I don't have a good curriculum, and my class textbook is like cliffnotes for programming. This will be my last class at this university. The C++ teztbook I use(my own not for class) is Sam's C++ One hour a day. #include <iostream> #include<cstdlib> #include<cstring> using namespace std; struct MyTime { int hours, minutes, seconds; }; int DetermineElapsedTime(const MyTime *t1, const MyTime *t2); long t1, t2; int DetermineElapsedTime(const MyTime *t1, const MyTime *t2) { return((int)t2-t1); } int main(void) { char delim1, delim2; MyTime tm, tm2; cout << "Input two formats for the time. Separate each with a space. Ex: hr:min:sec\n"; cin >> tm.hours >> delim1 >> tm.minutes >> delim2 >> tm.seconds; cin >> tm2.hours >> delim1 >> tm2.minutes >> delim2 >> tm2.seconds; DetermineElapsedTime(tm, tm2); return 0; } I have to fix the errors first. Anyone have any ideas??

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• JavaScript 1.6 Array.map() and Array.filter() not working with built in functions as arguments

  - by bucabay

  This works fine: ["655971", "2343", "343"].map(function(x) { return parseInt(x) }) // [655971, 2343, 343] But this doesnt: ["655971", "2343", "343"].map(parseInt) // [655971, NaN, NaN] The same happens for Array.filter() What am I missing here?

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• What's a good equivalent to python's subprocess.check_call that returns the contents of stdout?

  - by Chris R

  I'd like a good method that matches the interface of subprocess.check_call -- ie, it throws CalledProcessError when it fails, is synchronous, &c -- but instead of returning the return code of the command (if it even does that) returns the program's output, either only stdout, or a tuple of (stdout, stderr). Does somebody have a method that does this?

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• How to overwrite a convenience constructor the proper way?

  - by mystify

  For example I want to overwrite from UIButton: + (id)buttonWithType:(UIButtonType)buttonType So I would do: + (id)buttonWithType:(UIButtonType)buttonType { UIButton *button = [UIButton buttonWithType:buttonType]; if (button != nil) { // do own config stuff ... } return button; } is that the right way? Or did I miss something? (yeah, I have been overwriting thousands of instance methods, but never class methods ;) )

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• Can I safely use CGFloat to hold Float64 or Float32 values?

  - by mystify

  I have an CGFloat property and sometimes I get a return value of type Float64 or also of type Float32. Could I store both safely to CGFloat?

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• .NET Results Class

  - by pm_2

  I have a C# function that does some processing and needs to return figures about what it has processed, success, failure, etc. Can anyone tell me if there are any standard framework classes that will handle this (for example, number of records processed, number successful, failed, etc) ? Alternatively, can anyone say how they usually handle this? Is the best way to create a class, or to use out parameters?

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• How can I animate DIVs moving from a central point to off-screen?

  - by Aramael Pena-Alcantara

  Is it possible to have divs located around a central point and then on hover for them to whisk off screen and return when the mouse is gone? This what the layout is looking like, the idea is for the green "leaves" to whisk off to show the branches and the menus. Would this be possible with JavaScript and PHP?

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• Using RedirectToAction with custom type parameter

  - by user170497

  Hi asp.net mvc 2 I have this action in Identity controller public ActionResult Details(string id, MessageUi message) { And I'm trying to redirect to this action from another controller, but I don't know how should I pass the message parameter I was trying with var id = "someidvalue" var message = new MessageUi("somevalue"); return RedirectToAction("Details", "Identity", new { id, message}); } but message parameter is null

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• LAbeling with Percentage in R plot

  - by Libo Cannici

  Hi I have made this function that takes a table and prepare the label for a barplot prepare_labels <- function(ft){ labs <- ft labs <- paste(labs, "\n", sep="") labs <- paste(labs, round(prop.table(ft)*100,2), sep="") labs <- paste(labs, "%", sep="") return(labs) } It actually works fine, but is there any better way to write that function, the above code looks ugly and I want to write beautiful code :-) ex: ft <- table(mydata$phone_partner_products) prepare_labels(ft) [1] "3752\n34.09%" "226\n2.05%" "2907\n26.41%" "1404\n12.76%" "1653\n15.02%" [6] "1065\n9.68%"

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• Create a new instance in a static function of an abstract class

  - by arno

  abstract class db_table { static function get_all_rows() { ... while(...) { $rows[] = new self(); ... } return $rows; } } class user extends db_table { } $rows = user::get_all_rows(); I want to create instances of a class from a static method defined in the abstract parent class but PHP tells me "Fatal error: Cannot instantiate abstract class ..." How should I implement it correctly?

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• How would you calculate all possible permutations of 0 through N iteratively?

  - by Bob Aman

  I need to calculate permutations iteratively. The method signature looks like: int[][] permute(int n) For n = 3 for example, the return value would be: [[0,1,2], [0,2,1], [1,0,2], [1,2,0], [2,0,1], [2,1,0]] How would you go about doing this iteratively in the most efficient way possible? I can do this recursively, but I'm interested in seeing lots of alternate ways to doing it iteratively.

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• get average color of image via javascript

  - by Ben4Himv

  Not sure this is possible, but Looking to write a script that would return the average hex or rgb value for an image. I know it can be done in AS but looking to do it in JavaScript.

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• form validation without reset

  - by Paulo Bueno

  Hi guys Is there a way to check the data sent by a form to a PHP page return to the form page WITHOUT resetting the data sent and show a error? The form has 20 fields and I need to check one of them on a bd. If it fails the user may be redirected to the form page with the form populated and displaying a error message on the field which is 'wrong'. I would like any advice of a technique instead of populating each field using PHP.

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• What's the PHP equivalent of ASP.NET ashx handlers ?

  - by Quandary

  I need to return a JSON encoded response to a flash http get request. In ASP.NET, I do this with a ASHX handler. What's the PHP equivalent ? I mean in order that I only get JSON back, and not the <html> etc.

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• Speeding up Math calculations in Java

  - by Simon

  I have a neural network written in Java which uses a sigmoid transfer function defined as follows: private static double sigmoid(double x) { return 1 / (1 + Math.exp(-x)); } and this is called many times during training and computation using the network. Is there any way of speeding this up? It's not that it's slow, it's just that it is used a lot, so a small optimisation here would be a big overall gain.

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• Which is preferred: new Nullable<int> or (int?)null ?

  - by abatishchev

  Which way is preferred in expressions like this: int? Id { get { int i; return Int32.TryParse(Request["id"], out i) ? i : (int?)null; } } is it better to cast on null or create a new Nullable<T> ?

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