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  • How does SET works with property in C#?

    - by Richard77
    Hello, I'd like to know how set works in a property when it does more than just setting the value of a private member variable. Let's say I've a private member in my class (private int myInt). For instance, I can make sure that the the value returned is not negative get { if(myInt < 0) myInt = 0; return myInt; } With SET, all I can do is affecting the private variable like so set { myInt = value; } I didn't see in any book how I can do more than that. How about if I wan't to do some operation before affecting the value to myInt? Let's say: If the value is negative, affect 0 to myInt. set { //Check if the value is non-negative, otherwise affect the 0 to myInt } Thanks for helping

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  • Delegate Method only Firing after 5 or so Button Presses?

    - by CoDEFRo
    I'm having the most bizarre problem which I'm not even close to figuring out. I have a button which fires a delegate method. Once upon a time it was working fine, but after making some changes to my code, now the delegate method only fires after I push the button x amount of times (the changes I made to the code had nothing to do with the infrastructure that connects the delegate together). It varies, it can be 5 times to 10 times. I used the analyzer to check for memory leaks and there aren't any. There is too much code for me to paste here (I don't even know where to start or where the problem could be), but I'm wondering if anyone has experienced this problem before, or what could be causing it? This is very odd and have no clue what could be causing it.

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  • javascript regular expressions

    - by Zhasulan Berdybekov
    Help me with regular expressions. I need to check the text on the hour and minute. That is the first case, the text can be from 0 to 12. In the second case, the text can be from 1 to 60. this is my code: var hourRegEx = /^([0-9]{2})$/; //You can fix this line of code? $(document).ready( function(){ $('form.form').submit(function(){ if( $('input.hour').val().match(hourRegEx) ){ return true; } return false; }); }); In my case, the code says that, for example 52, too, the correct answer

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  • Insert a row and avoiding race condition (PHP/MySQL)

    - by justkevin
    I'm working on a multiplayer game which has a lobby-like area where players select "sectors" to enter. The lobby gateway is powered by PHP, while actual gameplay is handled by one or more Java servers. The datastore is MySQL. The happy path: A player chooses a sector and tells the lobby he'd like to enter. The lobby checks whether this is okay, including checking whether there are too many players in the sector (compares the entry count in sector assignments for that sector against the sector's max_players value). The player is added to the sector_assignments table pairing him with the sector. The player client receives a passkey that will let him connect to the appropriate game server. The race condition: If two players request access to the same sector at close to same time, I can envision a case where they are both added because there was one space free when their check was started and max players gets exceeded. Is the best solution LOCK TABLE on sector_assignments? Is there another option?

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  • Using a method defined in appliciaton_controller.rb in application_controller.rb

    - by E.E.33
    I want to change my layout based on whether or not the current user is an admin. So I made a simple method to check if current user is admin, I then call that method in application controller. I keep getting the following error: undefined method `is_admin?' for ApplicationController:Class My code looks like this: class ApplicationController < ActionController::Base protect_from_forgery helper_method :current_user, :is_admin? if is_admin? layout 'admin' end ..... protected ..... def is_admin? if current_user.user_role == 'admin' return true end end end How should I be doing this? Thanks

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  • Error while trying to reverse a char array in C++

    - by mpminnich
    Hi, I'm trying to get better at C++ (I know a little). I'm working on character arrays. I found an exercise where the objective is to reverse a character array (after I convert it from an integer). I'm getting the following error (using VS2005): Run-Time Check Failure #2 - Stack around the variable 'revBuffer' was corrupted. When I step through the code, I notice the following: revBuffer = 0x0012fe40 "100899ÌÌÌÌÌÌÌÌÌÌ998001" The relevant code is below. char buffer[5]; char revBuffer[5]; int i; int j=5; long number = 998001; itoa(number, buffer, 10); for(i=0; i<strlen(buffer);i++) { revBuffer[j] = buffer[i]; j--; } Any help would be great. TIA!

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  • Return from jQuery Ajax Method

    - by Lijo
    I have a button named searchReportButton. On this button click, I need to check session value from server using a ajax web method "Error.aspx/CheckSessionExpiry".This is done in checkSession javascript function. The checkSession is not returning anything now - instead it is handling the required operation based on the result (redirecting to error page). I need to return the result of ajax web method to the Main Caller. How can we do this return? Main Caller searchReportButton.click(function () { checkSession(); //Remainging Code }); Helper function checkSession() { var win = 101; $.ajax( { type: "POST", url: "Error.aspx/CheckSessionExpiry", data: '{"winNumber": "' + win + '"}', contentType: "application/json; charset=utf-8", dataType: "json", success: handleSessionResult } ); } Result Helper function handleSessionResult(result) { if (result.hasOwnProperty("d")) { result = result.d } if (result == "ACTIVE") { window.location.href("Error.aspx"); return false; } //alert(result); }

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  • [VC++ 2010] Stack around the variable 'xyz' was corrupted.

    - by tirolerhut
    hi, I'm trying to get some simple piece of code I found on a website to work in VC++ 2010 on windows vista 64: #include "stdafx.h" #include <windows.h> int _tmain(int argc, _TCHAR* argv[]) { DWORD dResult; BOOL result; char oldWallPaper[MAX_PATH]; result = SystemParametersInfo(SPI_GETDESKWALLPAPER, sizeof(oldWallPaper)-1, oldWallPaper, 0); fprintf(stderr, "Current desktop background is %s\n", oldWallPaper); return 0; } it does compile, but when I run it, I always get this error: Run-Time Check Failure #2 - Stack around the variable 'oldWallPaper' was corrupted. I'm not sure what is going wrong, but I noticed, that the value of oldWallPaper looks something like "C\0\:\0\0U\0s\0e\0r\0s[...]" -- I'm wondering where all the \0s come from. A friend of mine compiled it on windows xp 32 (also VC++ 2010) and is able to run it without problems any clues/hints/opinions? thanks

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  • Is there a circular hash function?

    - by Phil H
    Thinking about this question on testing string rotation, I wondered: Is there was such thing as a circular/cyclic hash function? E.g. h(abcdef) = h(bcdefa) = h(cdefab) etc Uses for this include scalable algorithms which can check n strings against each other to see where some are rotations of others. I suppose the essence of the hash is to extract information which is order-specific but not position-specific. Maybe something that finds a deterministic 'first position', rotates to it and hashes the result? It all seems plausible, but slightly beyond my grasp at the moment; it must be out there already...

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  • Create xml file based on xPath from Excel with VBA

    - by user1626236
    I've found some items that seem to dance around what I'm looking to do. I'm not a full-fledged programmer, but have been creating my own macros in Excel. I'm trying to create one now that will help me create the structure of an XML file. I want to go down the list of XPaths, and for each one create any parents in the path as needed as well as the child and its value. I'll be adding another aspect to filter it to the fields I want, but the part I'm struggling with is the logic to check if each parent node exists, create it if needed, then add the child and its value. Bonus would be if the output file were formatted with each node on a new line, and more so if it child nodes were indented from parent, but just creating it is my primary concern. Any help would be much appreciated, this has to potential to save me a lot of time.

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  • iPhone App on iPad - What is the extra effort?

    - by hol
    I started to develop an iPhone App for a client but the binary not yet submitted to Apple. My client asked me whether they can run the iPhone App also on the iPad. I am not sure what to answer. I am away from home and cannot even check how this all works in XCode. I wonder whether I have to submit two binaries two Apple - one for iPhone and one for iPad - or how this all works? If somebody with experience can explain me. Basically I need to figure out how much more effort I have to consider if it is only making the app work on the iPad. I do not mean the effort to redesign the whole app being a real "iPad app". Just to make it work and when somebody downloads the app and it can be for an iPhone and for an iPad and it does not matter.

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  • [PHP] What exactly does it mean when $_FILES is empty?

    - by Mike
    I am working on a PHP upload script and when testing my error checks, I attempted to upload a 17MB TIFF file. When I do this the $_FILES array is empty. The script works fine for what I need it to do, which is to upload JPEG files. My solution is to test if $_FILES is empty or not before continuing with the upload script. Can anybody explain why $_FILES is empty when a TIFF is attempted to be uploaded? Is my solution, to check if $_FILES is empty or not, an okay one? Does this have something to do with settings in php.ini?

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  • Make array from $_POST values

    - by cbarg
    Let's start telling that I'm passing an x amount of variables via post from a form. Let's name them menu_category_1, menu_category_2, ..., menu_category_x, plus, maybe, menu_category_new (I'm using an if empty to check this last one variable). To make things easier I'm also sending the parameter $key (amount of variables starting from 0). Now I need to set them into a new variable $menu_category (array), which is going to be imploded and then update my database. How do I set up that new $menu_category variable to be an array containing all my variables named in the beginning? I was thinking of using a for loop but I can't come up with something useful. Thanks!!!

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  • removing image tag from memory

    - by Chapsterj
    I have seen some code to check if a background image on a div is loaded. What they are doing is adding a img tag to memory but storing it in a variable and using that to see if the image is loaded with the load event. My question is does the $img tag stay in memory and how would I be able to remove that tag when the load event has been called. var $div = $('div'), bg = $div.css('background-image'); if (bg) { var src = bg.replace(/(^url\()|(\)$|[\"\'])/g, ''), $img = $('<img>').attr('src', src).on('load', function() { // do something, maybe: $div.fadeIn(); }); } }); I got this code above from this post

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  • Where does the 'method' implementation go? (I'm a newbie)

    - by Spokane-Dude
    I have this code: #import "SQLiteDB.h" @implementation SQLiteDB @synthesize db, dbPath, databaseKey; @end //-------------- check for database or create it ----------------| - (void)checkForDatabase { NSFileManager *filemanager = [NSFileManager defaultManager]; NSString *databasePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingString:@"/ppcipher.s3db"]; if(![filemanager fileExistsAtPath:databasePath]) { //Database doesn't exist yet, so we create it... NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingString:@"/ppcipher.s3db"]; sqlite3 *db; if(sqlite3_open(databasePath, db) == SQLITE_OK) { } } } It's complaining that "method definition not in @implementation context". So where does it go? (I tried in the .h file, but still get the error)

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  • Mysql Constraint problem

    - by Bramjam
    this is my table /* oefenreeks leerplan */ CREATE TABLE leerplan_oefenreeks ( leerplan_oefenreeks_id INT PRIMARY KEY AUTO_INCREMENT NOT NULL, leerplan_id INT NOT NULL, oefenreeks_id INT NOT NULL, plaats INT NOT NULL ); /* fk */ ALTER TABLE leerplan_oefenreeks ADD CONSTRAINT fk_leerp_oefenr_leerplan FOREIGN KEY(leerplan_id) REFERENCES leerplan (leerplan_id) ON DELETE CASCADE; ALTER TABLE leerplan_oefenreeks ADD CONSTRAINT fk_leerp_oefenr_oefenreeks FOREIGN KEY(oefenreeks_id) REFERENCES oefenreeks (oefenreeks_id) ON DELETE CASCADE; /* unique s *//*when I execute the nexline, my fk_leerp_oefenr_leerplan constraint vanishes/disappears*/ ALTER TABLE leerplan_oefenreeks ADD CONSTRAINT un_leerp_oefenr UNIQUE(leerplan_id, oefenreeks_id); ALTER TABLE leerplan_oefenreeks ADD CONSTRAINT un_leerp_oefenr_plaats UNIQUE(leerplan_id, plaats); when I go and check only 3 constraints exist (fk_leerp_oefenr_leerplan is gone) I don't understand why this happens, plz tell me (if you need more info just ask ;)

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  • Regular expression problem

    - by sYl3r
    Hi, How can I search a whole string for a specific match. It'll contain both characters with int or decimal numbers eg A12B32.25C-456D-75.E75 I'll know that this will start with A and ends with E I think I can use "^" and "$" right? but i'm bit lost in other parts to check for character and int or decimal. I'll be glad if you can give the regex and explain it a bit :). PS. D-75. is not mistyped... Thanks in advance.

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  • convert char[] to String in btrace

    - by usovmv
    Hi folks! I'm profiling application with btrace (https://btrace.dev.java.net) and faced with limitation. I try to get a name of current java.lang.Thread. Normaly you can call getName() but it's forbidden in btrace-scripts (any calls exception BTraceUtils). Is there any idea how to get String from char[]. The original task is check if name of thread contains sub-string and only then log out tracing info (reducing output). thanks, Max.

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  • need the right way to setcookie in wordpress

    - by jq beginner
    i've been looking the whole day how to setcookies in wordpress. in my way i found out (using the developer toolbar) that the cookie is set but still not working. i have 2 files the first contains the login form redirecting to another page to set the cookie and return to another page to check if it's working. domain which is tested on is like this : blog.mydomain.com. here's the setcookie file : <?php setcookie("user_name","test",time()+3600); ?> and chcking the cookie like this : if(isset($_COOKIE["user_name"])){ echo "cookie exists"; } else{ echo "cookie doesn't exist"; } i've read many topics about this issue but there was no clear answer. Thanks in advance

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  • Array to string conversion in (cant get it to work)

    - by user2966551
    ok I am trying to pull a a specific row of data that corresponds to the username logged in. on my page I have started my session but for some reason I cant get the code to work.i keep getting a "Array to string conversion in " on the line " WHERE username = '$_SESSION[user]'");" what am I doing wrong? if I set username = a set username it works but I need it to draw from the session id so it will display different values based on whos logged in. <?php $con=mysqli_connect("localhost","root","xxx","xxxx"); // Check connection if (mysqli_connect_errno()) { echo "Failed to connect to MySQL: " . mysqli_connect_error(); } $result = mysqli_query($con,"SELECT * FROM users WHERE username = '$_SESSION[user]'"); while($row = mysqli_fetch_array($result)) { echo $row['username'] . " " . $row['att']; echo "<br>"; } ?>

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  • How to make shell output redirect (>) write while script is still running?

    - by Noio
    I wrote a short script that never terminates. This script continuously generates output that I have to check on every now and then. I'm running it on a lab computer through SSH, and redirecting the output to a file in my public_html folder on that machine. python script.py > ~/public_html/results.txt However, the results don't show up immediately when I refresh the address. The results show up when I terminate the program, but as I said, it doesn't halt by itself. Is that redirect (>) being lazy with with writing? Is there a way to continuously (or with an interval) update the results in the file? Or is it the webserver that doesn't update the file while it is still being written?

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  • why does the data property in an jquery ajax call override my return false?

    - by user315709
    hi, i have the following block of code: $("#contact_container form, #contact_details form").live( "submit", function(event) { $.ajax({ type: this.method, url: this.action, data: this.serialize(), success: function(data) { data = $(data).find("#content"); $("#contact_details").html(data); }, }); return false; } ; when i leave out the data: this.serialize(), it behaves properly and displays the response within the #contact_details div. however, when i leave it in, it submits the form, causing the page to navigate away. why does the presence of the data attribute negates the return false? (probably due to a bug that i can't spot...) also, is the syntax to my find statement correct? it comes back as "undefined" even though i use a debugger to check the ajax response and that id does exists. thanks, steve

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  • MySql. What is there error on this insert+select+where statement?

    - by acidzombie24
    What is wrong with this statement? It works with sqlite and MS sql (last time i tested it) I would like a select unless there is no match with name or email. Then i would like to insert. I have it as one statement because its easy to keep concurrent safe as one statement. (its not that complex of a statement). INSERT INTO `user_data` ( `last_login_ip`, `login_date`, ...) SELECT @0, @14 WHERE not exists (SELECT * FROM `user_data` WHERE `name` = @15 OR `unconfirmed_email` = @16 LIMIT 1); Exception You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE not exists (SELECT * FROM `user_data` WHERE `name` = 'thename' OR `unconfirmed' at line 31

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  • e-library system development

    - by mmcc
    I want to develop an web based library system, and it may feature a "add this book to cart" function, and in its cart page, user can set the book reservation date and click 'Ok' button to finish the reservation process. On the backend side, the admin management page can check that reservation request information. To achieve this function, which way can do so? 1. Asp.net MVC + C# + MSSQL 2. Dotnetnuke (i don't know if this CMS can help) or any idea ?

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  • rewrite condition for directory along with file

    - by RHR
    Any one please help me.I am new to .htaccess I want to check the following condition RewriteCond : IF !index.html AND !app/facebookapp/{[a-zA-Z0-9-/]}.html RewriteRule : ..... My code is RewriteCond %{REQUEST_URI} !index\.html RewriteCond %{REQUEST_URI} app/facebookapp/^([a-zA-Z0-9-/]+).html$ RewriteRule ...... its not working And one more question if the request url is header.html RewriteCond %{REQUEST_URI} header.html$ RewriteRule ^([a-zA-Z0-9-/]+).html$ position.php?position=$1 [L] $l will return header. if the request url is app/facebookapp/header.html we write the same above condition $l will return app/facebookapp/header.my question is how to get only the filename ?? thanks

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