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  • How do Arrays work in C#?

    - by Slateboard
    I know that they are used to store data, but I have a difficult time understanding exactly how to use them in a program. In addition, I found this site with a tetris clone tutorial (the actual tutorial is missing). It uses arrays, but I can't really make sense of how it works. Here's an example of the code - public int[, ,] TShape = new int[4, 4, 2] { {{1, 0}, {0, 1}, {1, 1}, {2, 1}}, {{1, 0}, {0, 1}, {1, 1}, {1, 2}}, {{0, 0}, {1, 0}, {2, 0}, {1, 1}}, {{0, 0}, {0, 1}, {1, 1}, {0, 2}}}; Could it be that I'm looking too hard into this, or perhaps there's something I'm not grasping about it?

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  • Script to create a table and fields in SQL wont work

    - by Jacksta
    Warning this is lenghty! attack if you knowledagble. well at least more then a newb beginner like me. This script uses three files as detailed below. It is suppoed to create the database and fields from the form input. It gets to the end and shows my_contacts has been created!. But when i go into phpMyadmin the table has not been created. I have a file named show_createtable.html which is used to create a table in MySQL <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Untitled Document</title> </head> <body> <h1>Step 1: Name and Number</h1> <form method="post" action="do_showfielddef.php" /> <p><strong>Table Name:</strong><br /> <input type="text" name="table_name" size="30" /></p> <p><strong>Number of fields:</strong><br /> <input type="text" name="num_fields" size="30" /></p> <p><input type="submit" name="submit" value="go to step2" /></p> </form> </body> </html> This Form Posts to do_showfielddef.php <?php //validate important input if ((!$_POST[table_name]) || (!$_POST[num_fields])) { header( "location: show_createtable.html"); exit; } //begin creating form for display $form_block = " <form action=\"do_createtable.php\" method=\"post\"> <input name=\"table_name\" type=\"hidden\" value=\"$_POST[table_name]\"> <table cellspacing=\"5\" cellpadding=\"5\"> <tr> <th>Field Name</th><th>Field Type</th><th>Table Length</th><th>Primary Key?</th><th>Auto-Increment?</th> </tr>"; //count from 0 until you reach the number fo fields for ($i = 0; $i <$_POST[num_fields]; $i++) { $form_block .=" <tr> <td align=center><input type=\"texr\" name=\"field name[]\" size=\"30\"></td> <td align=center> <select name=\"field_type[]\"> <option value=\"char\">char</option> <option value=\"date\">date</option> <option value=\"float\">float</option> <option value=\"int\">int</option> <option value=\"text\">text</option> <option value=\"varchar\">varchar</option> </select> </td> <td align=center><input type=\"text\" name=\"field_length[]\" size=\"5\"></td> <td aligh=center><input type=\"checkbox\" name=\"primary[]\" value=\"Y\"></td> <td aligh=center><input type=\"checkbox\" name=\"auto_increment[]\" value=\"Y\"></td> </tr>"; } //finish up the form $form_block .= " <tr> <td align=center colspan=3><input type =\"submit\" value=\"create table\"> </td> </tr> </table> </form>"; ?> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Create a database table: Step 2</title> </head> <body> <h1>defnie fields for <? echo "$_POST[table_name]"; ?> </h1> <? echo "$form_block"; ?> </body> </html> Which in turn creates the table and fields with this file do_showfielddef.php //connect to database $connection = @mysql_connect("localhost", "user", "pass") or die(mysql_error()); $db = @mysql_select_db($db_name, $connection) or die(mysql_error()); //start creating the SQL statement $sql = "CREATE TABLE $_POST[table_name]("; //continue the SQL statement for each new field for ($i = 0; $i < count($_POST[field_name]); $i++) { $sql .= $_POST[field_name][$i]." ".$_POST[field_type][$i]; if ($_POST[auto_increment][$i] =="Y") { $additional = "NOT NULL auto_increment"; } else { $additional = ""; } if ($_POST[primary][$i] =="Y") { $additional .= ", primary key (".$_POST[field_name][$i].")"; } else { $additional = ""; } if ($_POST[field_length][$i] !="") { $sql .= " (".$_POST[field_length][$i].") $additional ,"; } else { $sql .=" $additional ,"; } } //clean up the end of the string $sql = substr($sql, 0, -1); $sql .= ")"; //execute the query $result = mysql_query($sql, $connection) or die(mysql_error()); //get a giid message for display upon success if ($result) { $msg = "<p>" .$_POST[table_name]." has been created!</p>"; } ?> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Create A Database Table: Step 3</title> </head> <body> <h1>Adding table to <? echo "$db_name"; ?>...</h1> <? echo "$msg"; ?> </body> </html>

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  • i don't know how to work with command argument in asp.net

    - by Depozitul de Chestii
    hey, i'm tryng to pass a parameter with command argument with a link button but the result i get is always "". this is in my aspx page: <% LinkButton1.CommandArgument = "abcdef"; %> <asp:LinkButton ID="LinkButton1" runat="server" OnCommand= "LinkButton1_Click"> and in my aspx.cs i have: protected void LinkButton1_Click(object sender,CommandEventArgs ee) { String id = ee.CommandName.ToString(); } the id is always "" after i press the linkbutton. would appreciate if someone could help me. thanks

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  • setTimeout doesn't work with window.location?

    - by Syom
    i try to rich flash like effect when changing window location, but there is a small problem, i can't solve. look at the script please $(document).ready(function(){ $('a.flash').click(function(e) { e.preventDefault(); $('body').fadeOut(1500); setTimeout("", 1500); window.location=this.href; }); }); window.location=this.href must be done after 1500ms, but it doesn't happen. could you explain why? what is strange, when i try to write alert("something"); instead of window.location=this.href, it works fine. Could you explain why? Thanks

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  • Centering of a div, but the normal CSS does not work

    - by Jean
    Hello, I want to center a div, but the general way is #selector{position:relative;margin:0px auto;} What exactly is wrong below #crp{top:40%; position:absolute; margin:auto;} The Div below is not nested but a standalone. The #crp is going to the extreme right. <div id="crp">...something goes here....</div> Thanks Jean

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  • Why does "non exists" SQL query work and "not in" doesn't

    - by Josh
    I spent some time trying to figure out why this query isn't pulling the results i expected: SELECT * FROM NGS WHERE ESPSSN NOT IN (SELECT SSN FROM CENSUS) finally i tried writing the query another way and this ended up getting the expected results: SELECT * FROM NGS n WHERE NOT EXISTS (SELECT * FROM CENSUS WHERE SSN = n.ESPSSN) The first query seems more appropriate and "correct". I use "in" and "not in" all the time for similar selects and have never had a problem that i know of.

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  • Porting a web application to work in IE7

    - by Bears will eat you
    I'm developing a web application that uses lots of Javascript and CSS, both of my own creation and through third-party libraries. These include jQuery and Google Maps & Visualization JS APIs. I've been testing everything in Firefox 3. Things are peachy until it turns out the main target of this webapp is (cue sad trombone) IE7. I'm looking for caveats, advice, libraries, or other references to help make this transition as easy as possible (not that it's actually going to be easy). I've already tried IE7.js though it hasn't yet shown itself to be the silver bullet I was hoping for. I'm sure that it works as advertised, I think it's just not as all-encompassing as I'd like (example: colors like #4684EE and #DC3912, which are correctly rendered in FF3, are rendered as black in IE7, with or without IE7.js). Are there other libraries out there to help bring IE7 (more) in line with FF3? A corollary question: what debugger would you recommend for IE7? I'm currently using Firebug Lite, but it runs painfully slowly. Is there anything out there with similar features that I might have missed?

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  • javascript __doPostBack doesn't seem to work for me...

    - by Pandiya Chendur
    I use yui datatable in my asp.net application... I have a link button in one of my columns and it works fine but doesn't do a postback of a hidden button... myDataTable.subscribe("linkClickEvent", function(oArgs) { javascript: __doPostBack('ctl00_ContentPlaceHolder1_Button1', ''); YAHOO.util.Event.stopEvent(oArgs.event); }); and in my page <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" style="display:none;" /> protected void Button1_Click(object sender, EventArgs e) { DownloadFile(Hfhref.Value, true); } I used break point but it doesn't seem to get the __dopostback.. Any suggestion...

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  • PHP include doesn't work

    - by Chris
    I'm not sure how simple is this to solve, but I assume I'm doing something wrong. I'm new to PHP, so bear with me, please. When I started learning PHP, I always placed all my project files into the same folder along with index.php and thus included everything like this: <?php include('./translation.php'); ?> Later on in the process of learning as I gained experience and my skill increased, I had to start using folders and place my files into sub folders. I ended up successfully including my files with the following: <?php include('../translation.php'); ?> My trouble-free coding took an unexpected turn when I decided to start using sub-sub folders. After placing all the files even deeper into the file structure I was shocked to find out that I cannot include them anymore, using: <?php include('.../translation.php'); ?> Now I'm lost. What did I do wrong? Am I to understand that I cannot include files deeper than 2 directories in the project? Should I start using a different file system?

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  • Why this cache doesn't work using final as modifier

    - by Pentium10
    I have this code to get the Cursor once for this instance, and the Log shows it is called many times although I marked as final. What I am missing? private Cursor getAllContactsCached() { final Cursor c=this.getList(); return c; } getAllContactsCached method should retrieve list once, and the 2nd time it should reuse the final object for return

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  • DRUPAL: JQuery Media module: flash video player doesn't work

    - by Patrick
    hi, I'm using JQuery Media module to integrate my own flash video player with Drupal website. I've tested everything on a local drupal installation and it works great. However I've updated an online drupal website and the player is not used. I can only see this message: "Use SwfTools Module to play FLV files if you only convert/upload FLV videos or FlowPlayer Module must be enabled in order to play FLV videos with other types." thanks

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  • How does Windows' 'Open with' work?

    - by Frederick
    I was under the impression that when you double click a file (or choose 'Open With' from the right click menu), Windows simply calls the application with the filename as the parameter. Something like this: C: App.exe file.abc However, I just double clicked an .xls file and then checked the PEB of the Excel instance that sprang up. To my surprise the commandline did not contain the filename as a parameter. So that set me wondering. What exactly is mechanism Windows uses to have a file opened by a relevant application? Is there a special API that each application that supports such facility must expose?

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  • asp:calendar not work correctly in MVC

    - by TStamper
    I have an asp:calendar on my view page and as I hover over it..it shows a javascript postback status bar. but I have an asp:button also on the same page and when I hover over it. The action from the controller is in the status bar..because I have an onClick attribute for the button that triggers an action on the server side. and in the asp:calendar I also have a trigger event OnSelectionChanged the has a method on the server side...but as I said when I hover over the calendar to pick a date in the status bar it shows:javascript:_doPostBack($ct100ContentPlaceHolder?mycalendar',''3270) and when I click a date I receive an error that says object doesnt support this method..Also mycalendar is the id name of the asp:calendar

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  • How exactly does fopen(), fclose() work?

    - by user625672
    Hi, I was just wondering about the functions fopen, fclose, socket and closesocket. When calling fopen or opening a socket, what exactly is happening (especially memory wise)? Can opening files/sockets without closing them cause memory leaks? And third, how are sockets created and what do they look like memory wise? I'm also interrested in the role of the operating system (Windows) in reading the sockets and sending the data.

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  • how do i use htaccess to make http requests work properly

    - by Gabriel
    I currently have css and javascript file calls (amongst other things) like the following: href="/css/default.css" src="/js/ui_control.js" putting the preceding / in to make the files relative to the root. This works great when my page is in the root of the domain. However, I'm currently in the middle of transferring my site to a new hosting provider and as such have a temporary URL which is: HOST-IP/~username As such, all file calls are trying to be called from HOST-IP/css/default.css etc instead of within the ~username sub-folder. Of course I can wait until the domain name servers propagate but that's beside the point. How would I go about writing a rule in the .htaccess file that would redirect all file calls that start with a /, from going to HOST-IP/FILE-CALL, and instead to go to HOST-IP/~USERNAME/FILE-CALL. ? Any ideas?

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  • Union All Won't work in stored procedure

    - by MyHeadHurts
    ALTER PROCEDURE [dbo].[MyStoredProcedure1] @YearToGet int AS Select Division, SDESCR, DYYYY, Sum(APRICE) ASofSales, Sum(PARTY) AS ASofPAX, Sum(NetAmount) ASofNetSales, Sum(InsAmount) ASofInsSales, Sum(CancelRevenue) ASofCXSales, Sum(OtherAmount) ASofOtherSales, Sum(CXVALUE) ASofCXValue From dbo.B101BookingsDetails Where Booked <= CONVERT(int,DateAdd(year, @YearToGet - Year(getdate()), DateAdd(day, DateDiff(day, 1, getdate()), 0) ) ) and (DYYYY = @YearToGet) Group By SDESCR, DYYYY, Division Having (DYYYY = @YearToGet) Order By Division, SDESCR, DYYYY union all SELECT DIVISION, SDESCR, DYYYY, SUM(APRICE) AS YESales, SUM(PARTY) AS YEPAX, SUM(NetAmount) AS YENetSales, SUM(InsAmount) AS YEInsSales, SUM(CancelRevenue) AS YECXSales, SUM(OtherAmount) AS YEOtherSales, SUM(CXVALUE) AS YECXValue FROM dbo.B101BookingsDetails Where (DYYYY=@YearToGet) GROUP BY SDESCR, DYYYY, DIVISION ORDER BY DIVISION, SDESCR, DYYYY The error I am getting is Msg 156, Level 15, State 1, Procedure MyStoredProcedure1, Line 36 Incorrect syntax near the keyword 'union'. But my goal here is the user inputs a year for example 2009, my first query will get all the sales made in 2009 to the same date it is was yesterday 12/23/2009, while the second query is getting 2009 totals up to dec 31 2009. I want the columns to be side by side not in one column

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  • Excel workbooks produced by POI don't work when linked

    - by Eric Nicolas
    Here is what I'm doing : Create a workbook in memory (book = new HSSFWorkbook(), ...) Save it to disk (book.write(...)) Open in Excel (ok) Create another workbook in Excel, which links to the first one (=PoiWorkbook?xls!A1) Close Excel Then everytime I open the second workbook again, all the links are #N/A, unless I also open the POI-generated workbook at the same time. I never saw this behaviour with standard workbooks created in Excel. Anyone has seen this and found a workaround ? Thanks.

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  • "select * into table" Will it work for inserting data into existing table

    - by Shantanu Gupta
    I am trying to insert data from one of my existing table into another existing table. Is it possible to insert data into any existing table using select * into query. I think it can be done using union but in that case i need to record all data of my existing table into temporary table, then drop that table and finally than apply union to insert all records into same table eg. select * into #tblExisting from tblExisting drop table tblExisting select * into tblExisting from #tblExisting union tblActualData Here tblExisting is the table where I actually want to store all data tblActualData is the table from where data is to be appended to tblExisting. Is it right method. Do we have some other alternative ?

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  • How does Cell Minute Tracker work?

    - by embedded
    It's been a mystery how does Cell Minute Tracker manage to fetch AT&T users data. Maybe someone here has the long waited answer. I'm really curious rather they got a confirmation to scrape user’s cellular report And how they can fire up multiple requests to AT&T site without being banned? I'm waiting for someone who could shed some light on this mystery Thanks link: http://www.uquery.com/apps/311637771-cell-minute-tracker-for-att

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  • Why does this threading approach not work?

    - by Tomas Lycken
    I have a wierd problem with threading in an ASP.NET application. For some reason, when I run the code in the request thread, everything works as expected. But when I run it in a separate thread, nothing happens. This is verified by calling the below handler with the three flags "on", "off" and "larma" respectively - in the two first cases everything works, but in the latter nothing happens. What am I doing wrong here? In the web project I have a generic handler with the following code: If task = "on" Then Alarm.StartaLarm(personId) context.Response.Write("Larmet är PÅ") ElseIf task = "off" Then Alarm.StoppaLarm(personId) context.Response.Write("Larmet är AV") ElseIf task = "larma" Then Alarm.Larma(personId) context.Response.Write("Larmar... (stängs av automagiskt)") Else context.Response.Write("inget hände - task: " & task) End If The Alarm class has the following methods: Private Shared Sub Larma_Thread(ByVal personId As Integer) StartaLarm(personId) Thread.Sleep(1000 * 30) StoppaLarm(personId) End Sub Public Shared Sub StartaLarm(ByVal personId As Integer) SandSMS(True, personId) End Sub Public Shared Sub StoppaLarm(ByVal personId As Integer) SandSMS(False, personId) End Sub Public Shared Sub SandSMS(ByVal setOn As Boolean, ByVal personId As Integer) ... End Sub

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  • :order does not work on :include

    - by SpyrosP
    Hello there, i'm wondering why this gives me an error : DiscoveredLocation.find_all_by_user_id(user.id, :include => [:boss_location, :monsters], :order => 'boss_location.location_index ASC') It seems as if it's trying to execute a really long query and i get an error like : Mysql::Error: Unknown column 'monsters_discovered_locations_join.boss_location_id' in 'on clause': SELECT `discovered_locations`.`id` AS t0_r0, `discovered_locations`.`user_id` AS t0_r1, `discovered_locations`.`boss_location_id` AS t0_r2, `discovered_locations`.`created_at` AS t0_r3, `discovered_locations`.`updated_at` AS t0_r4, `boss_locations`.`id` AS t1_r0, `boss_locations`.`name` AS t1_r1, `boss_locations`.`location_index` AS t1_r2, `boss_locations`.`min_level` AS t1_r3, `boss_locations`.`needed_gold_to_open` AS t1_r4, `boss_locations`.`created_at` AS t1_r5, `boss_locations`.`updated_at` AS t1_r6, `monsters`.`id` AS t2_r0, `monsters`.`name` AS t2_r1, `monsters`.`strength` AS t2_r2, `monsters`.`dexterity` AS t2_r3, `monsters`.`magic` AS t2_r4, `monsters`.`accuracy` AS t2_r5, `monsters`.`minGold` AS t2_r6, `monsters`.`maxGold` AS t2_r7, `monsters`.`hp` AS t2_r8, `monsters`.`level` AS t2_r9, `monsters`.`armor` AS t2_r10, `monsters`.`first_class` AS t2_r11, `monsters`.`weapon_id` AS t2_r12, `monsters`.`imageName` AS t2_r13, `monsters`.`monster_type` AS t2_r14, `monsters`.`boss_location_index` AS t2_r15, `monsters`.`boss_location_id` AS t2_r16, `monsters`.`created_at` AS t2_r17, `monsters`.`updated_at` AS t2_r18 FROM `discovered_locations` LEFT OUTER JOIN `boss_locations` ON `boss_locations`.id = `discovered_locations`.boss_location_id LEFT OUTER JOIN `boss_locations` monsters_discovered_locations_join ON (`discovered_locations`.`id` = `monsters_discovered_locations_join`.`boss_location_id`) LEFT OUTER JOIN `monsters` ON (`monsters`.`boss_location_id` = `monsters_discovered_locations_join`.`id`) WHERE (`discovered_locations`.`user_id` = 986759322) ORDER BY boss_location.location_index ASC The models associations are : class BossKill < ActiveRecord::Base belongs_to :user belongs_to :monster class DiscoveredLocation < ActiveRecord::Base belongs_to :user belongs_to :boss_location has_many :monsters, :through => :boss_location has_many :boss_kills, :through => :monsters class BossLocation < ActiveRecord::Base has_many :discovered_locations has_many :users, :through => :discovered_locations has_many :monsters Any ideas ?

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  • Why does this TableView code work?

    - by nevan
    I made a typo when creating a UITableViewCell with this code: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"CellIdentifier"; UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { NSLog(@"Creating cell"); cell = [[[UITableViewCell alloc] initWithStyle:UITableViewStylePlain reuseIdentifier:CellIdentifier] autorelease]; } cell.textLabel.text = @"Hello"; return cell; } The typo is in using UITableViewStylePlain instead of UITableViewCellStyleDefault. The code worked fine, creating new cells. Why?

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  • AIR File.resolvePath won't work anymore

    - by Palleas
    Hi all, I'm having a very strange issue, it looks like my application can't create file anymore. It works w/ directories, but the so-many-times-used resolvePath() methods doesn't. Here is what I do : var databaseFileContent : File = new File(File.desktopDirectory.nativePath + "/testing"); databaseFileContent.createDirectory(); databaseFileContent.resolvePath("test"); (Here I'm trying on desktop but that's the same w/ applicationStorageDirectory) When I execute this, it works only for the "testing" folder which is actually created, but my file isn't. I tried to create another application, doing this : trace(File.desktopDirectory.resolvePath("maiswtf.db").exists); trace(File.applicationStorageDirectory.resolvePath("wtf.db").exists); Both are displaying "false". Am I missing something here? I have another application with this code : var databaseFileContent : File = File.applicationStorageDirectory.resolvePath(File.separator + "sitra.db"); When I run this one, it works perfectly! My file is created at /sitra.db! Any hints? I thinks I'm going mad :/ Thanks!

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