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  • C# convert binary data to string?

    - by Tom
    Hi, just going through the registry retrieving values and binary is making my file outputer fall. I was wondering how could I convert Subkey.getValue(value[i]) into a String if the Value type is binary? Thank you in advance

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  • Need help with 2 MySql Queries. Join vs Subqueries.

    - by BugBusterX
    I have 2 tables: user: id, name message: sender_id, receiver_id, message, read_at, created_at There are 2 results I need to retrieve and I'm trying to find the best solution. I have included queries that I'm using in the very end. I need to retrieve a list of users, and also with each user have information available whether there are any unread messages from each user (them as sender, me as receiver) and whether or not there are any read messages between us ( they send I'm receiver or I send they are receivers) I need Same as above, but only those members where there has been any messaging between us, sorted by unread first, then by last message received. Can you advise please? Should this be done with joins or subqueries? In first case I do not need the count, I just need to know whether or not there is at least one unread message. I'm posting code and my current queries, please have a look when you get a chance: BTW, everything is the way I want in fist query. My concern is: In second query I would like to order by messages.created_at, but I dont think I can do that with grouping? And also I dont know if this approach is the most optimized and fast. CREATE TABLE `user` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `name` varchar(255) NOT NULL, PRIMARY KEY (`id`) ) INSERT INTO `user` VALUES (1,'User 1'),(2,'User 2'),(3,'User 3'),(4,'User 4'),(5,'User 5'); CREATE TABLE `message` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `sender_id` bigint(20) DEFAULT NULL, `receiver_id` bigint(20) DEFAULT NULL, `message` text, `read_at` datetime DEFAULT NULL, `created_at` datetime NOT NULL, PRIMARY KEY (`id`) ) INSERT INTO `message` VALUES (1,3,1,'Messge',NULL,'2010-10-10 10:10:10'),(2,1,4,'Hey','2010-10-10 10:10:12','2010-10-10 10:10:11'),(3,4,1,'Hello','2010-10-10 10:10:19','2010-10-10 10:10:15'),(4,1,4,'Again','2010-10-10 10:10:25','2010-10-10 10:10:21'),(5,3,1,'Hiii',NULL,'2010-10-10 10:10:21'); SELECT u.*, m_new.id as have_new, m.id as have_any FROM user u LEFT JOIN message m_new ON (u.id = m_new.sender_id AND m_new.receiver_id = 1 AND m_new.read_at IS NULL) LEFT JOIN message m ON ((u.id = m.sender_id AND m.receiver_id = 1) OR (u.id = m.receiver_id AND m.sender_id = 1)) GROUP BY u.id SELECT u.*, m_new.id as have_new, m.id as have_any FROM user u LEFT JOIN message m_new ON (u.id = m_new.sender_id AND m_new.receiver_id = 1 AND m_new.read_at IS NULL) LEFT JOIN message m ON ((u.id = m.sender_id AND m.receiver_id = 1) OR (u.id = m.receiver_id AND m.sender_id = 1)) where m.id IS NOT NULL GROUP BY u.id

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  • Parallel computation of the median of a large array

    - by recipriversexclusion
    I got asked this question once and still haven't been able to figure it out: You have an array of N integers, where N is large, say, a billion. You want to calculate the median value of this array. Assume you have m+1 machines (m workers, one master) to distribute the job to. How would you go about doing this? Since the median is a nonlinear operator, you can't just find the median in each machine and then take the median of those values.

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  • php validation code format

    - by user2970887
    Okay I have this MySQL database form and am trying to add validation to it. After 2 days of fighting with it, I thought I would get some advice. Would like that the selected item from dropdown and Firstname, Phone, Email, are all required. Then I want to verify that the data in the Firstname, Lastname, Phone (doesn't have to be any special format), Email and Comments are all acceptable formats before putting in database. Here is what I have so far: <?php include('inc_header.php'); if(isset($_POST['add'])) { require('dbcon.php'); if(! get_magic_quotes_gpc() ) { $Id = addslashes ($_POST['Id']); $List = addslashes ($_POST['List']); $Firstname = addslashes ($_POST['Firstname']); $Lastname = addslashes ($_POST['Lastname']); $Phone = addslashes ($_POST['Phone']); $Email= addslashes ($_POST['Email']); $Calltime = addslashes ($_POST['Calltime']); $Comment = addslashes ($_POST['Comment']); } else { $Id = $_POST['Id']; $Date = $_POST['Date']; $List = $_POST['List']; $Firstname = $_POST['Firstname']; $Lastname = $_POST['Lastname']; $Phone = $_POST['Phone']; $Email = $_POST['Email']; $Calltime = $_POST['Calltime']; $Comment = $_POST['Comment']; } $error = ''; //put chosen function here function validate_Firstname($input, $pattern = "/([A-Za-z0-9])") { return !preg_match($pattern, $input); } function validate_Phone($input, $pattern = "/([A-Za-z0-9])") { return !preg_match($pattern, $input); } function isValidEmail( $Email ){ return filter_var( $Email, FILTER_VALIDATE_EMAIL ); } //get values and validate each one as required $List = mysql_real_escape_string($_POST['List']); if(!$List){ $error .= "Please choose one<br />"; } $Firstname = mysql_real_escape_string($_POST['Firstname']); if(!$Firstname){ $error .= "First name is required<br />"; } //get values and validate each one as required $Lastname = mysql_real_escape_string($_POST['Lastname']); if(!$Lastname){ $error .= "Last name is required<br />"; } //repeat for each field $Email = mysql_real_escape_string($_POST['Email']); if(!isValidEmail($Email)){ $error .= "The email entered is invalid<br />"; } //and so on... if(!$error){ //add insert into database code here $sql = "INSERT INTO contacts ". "(`Id`,`Date`,`List`,`Firstname`,`Lastname`,`Phone`,`Email`,`Calltime`,`Comment`)". "VALUES'$Id,','$Date','$List','$Firstname','$Lastname','$Phone','$Email','$Calltime','$Comment') "; mysql_select_db('hmintcwa_contacts'); $retval = mysql_query( $sql, $conn ); if(! $retval ) { die('Could not enter data: ' . mysql_error()); } echo "Entered data successfully<br /><br /><a href=contactsadd.php><font color=#000000>Back</font></a>\n"; mysql_close($conn); } else { ?> <form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" name="ContactForm"> <table bgcolor="#000000" width="500" cellpadding="5" cellspacing="1" border="0"> <input type="hidden" name="Id" id="Id"> <tr> <td bgcolor="#e9e9e9" align="right">Requested Info</td> <td bgcolor="#ffffff" align="left"><select name="List"> <option value="0" > Please Choose One </option> <option value="Market Analysis" > Market Analysis </option> <option value="Consultation" > Consultation </option></select></td></tr> <tr> <td bgcolor="#e9e9e9" align="right">Date</td> <input name="Date" type="hidden" id="Date" value="<? print(Date("l F d, Y")); ?>" /> <td bgcolor="#ffffff" align="left"><? print(Date("l F d, Y")); ?></td> </tr> <tr> <td bgcolor="#e9e9e9" align="right">Firstname</td> <td bgcolor="#ffffff" align="left"><input name="Firstname" type="text" size="20" id="Firstname"></td></tr> <tr> <td bgcolor="#e9e9e9" align="right">Lastname</td> <td bgcolor="#ffffff" align="left"><input type="text" name="Lastname" size="20" id="Lastname"></td> </tr> <tr> <td bgcolor="#e9e9e9" align="right">Phone</td> <td bgcolor="#ffffff" align="left"><input type="text" name="Phone" size="20" id="Phone"></td></tr> <tr> <td bgcolor="#e9e9e9" align="right">Email</td> <td bgcolor="#ffffff" align="left"><input type="text" name="Email" size="20" id="Email"></td></tr> <tr> <td bgcolor="#e9e9e9" align="right">Preferred Calltime</td> <td bgcolor="#ffffff" align="left"><input type="text" name="Calltime" size="20" id="Calltime"> &nbsp;&nbsp; If none put N/A</td></tr> <tr> <td bgcolor="#e9e9e9" align="right">Comment</td> <td bgcolor="#ffffff" align="left"><textarea name="Comment" cols="40" rows="8" id="Comment"></textarea></td></tr> <tr> <td bgcolor="#e9e9e9" align="right">&nbsp;</td> <td bgcolor="#ffffff" align="center"><br> <input name="add" type="submit" id="add" value="Add Contact"><input type="reset" name="Reset" value="Clear Form"><input type=button value="Cancel" onClick="history.go(-1)"><br>&nbsp; </td> </tr> </table> </form> <br>&nbsp;</center> <?php } ?> </body> </html> So far I just keep chasing error message. Please forgive formatting I am trying to learn be gentle.

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  • Outputcache - how to determine optimal value for duration?

    - by Steve
    I read somewhere that for a high traffic site (I guess that is a murky term as well), 30 - 60 seconds is a good value. Obviously I could do a load test and vary the values, but I couldn't find any kind of documentation on this. Most samples have a minute, a couple of minutes. There's no recommended range. Is there something on msdn or anywhere that talks about this?

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  • How can i use a variable created in a objective c Void function?

    - by James
    Im trying to get the lat and long values generated in a void function and use them within another function. Any help grateful. (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { float latDeg = newLocation.coordinate.latitude; NSLog(@"Lat: %g", latDeg); float longDeg = newLocation.coordinate.longitude; NSLog(@"Lat: %g", longDeg); } I want to use the latDeg and longDeg variables.

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  • Trouble editing Word document with PHP

    - by bhoomi-nature
    I want to open a word document and edit it I am opening the word document from the server and at that time it's opening with garbage values (perhaps it's not being properly converted to UTF-8). When I delete those garbage values and insert something from a textarea to that file it is going to insert and from then on it opens properly. I would like the document to open with the English words in the document instead of garbage value - it's only the first opening that's broken at present. <? $filename = 'test.doc'; if(isset($_REQUEST['Submit'])){ $somecontent = stripslashes($_POST['somecontent']); // Let's make sure the file exists and is writable first. if (is_writable($filename)) { // In our example we're opening $filename in append mode. // The file pointer is at the bottom of the file hence // that's where $somecontent will go when we fwrite() it. if (!$handle = fopen($filename, 'w')) { echo "Cannot open file ($filename)"; exit; } // Write $somecontent to our opened fi<form action="" method="get"></form>le. if (fwrite($handle, $somecontent) === FALSE) { echo "Cannot write to file ($filename)"; exit; } echo "Success, wrote ($somecontent) to file ($filename) <a href=".$_SERVER['PHP_SELF']."> - Continue - "; fclose($handle); } else { echo "The file $filename is not writable"; } } else { // get contents of a file into a string $handle = fopen($filename, 'r'); $somecontent = fread($handle, filesize($filename)); ?> <h1>Edit file <? echo $filename ;?></h1> <form name="form1" method="post" action=""> <p> <textarea name="somecontent" cols="80" rows="10"><? echo $somecontent ;?></textarea> </p> <p> <input type="submit" name="Submit" value="Submit"> </p> </form> <? fclose($handle); } ?>

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  • How can I implement a 'select all' check-box on my CRM 4 custom form?

    - by Gryphoenix
    I am working on a custom CRM form with numerous checkboxes, organized by sections. I would like to implement a 'select all' feature to the form and am trying to understand how to format the JavaScript. My research thus far has pointed me to the possibility of using a FOR statement to iterate through all of the elements in the section I want to process, setting their values accordingly, but am unsure of which document.getElements ... method to utilize.

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  • Regular expression matching in php

    - by user1836428
    I have this regexp: /(.*)(([0-9]([^a-zA-Z])*){7,}[0-9])(.*)/. Given the following values 0654535263 065453-.-5263 065asd4535263 Expected Results 06**** 06**** 06**** Actual Results 0654535263 06**** 065asd4535263 It does not match the last row because of the letters (I want to match from 0-3 letters) and it matches only last occurence (in the second row in example, it skips first row).

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  • Textbox not updating in UI screen

    - by subash
    i have a page consisting of devexpress gridview control with 4 columns and 4 asp.net text boxes. on selecting a row in gridview ,it should update the 4 textboxes with the values of the row selected. so i was assigning the value of the rows of the grid to the text box in the custom callback event of the grid and also the value gets assigned to the all textboxes's text property but it doesn't updates the textbox value in the UI screen.

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  • Help to comment a simple statement

    - by Woppie the Russian
    How does you call this statement?: $arr = array(); initialize an array or declare an array? In brief, how would you comment such a statement? (P.S. That array would then hold a bunch of values.) EDIT: I doubt because what I basically do is declare a variable of a particular type, don't I?

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  • my sql insert query not working

    - by Piyush
    I am inserting userId.It is displaying correct but inserting 0 in spite of actual userId. mycode- If(! empty($userIDToCheck) || $userIDToCheck != '' ) { echo $userIDToCheck; $sql = "INSERT INTOpnpdb.ruser(userid) VALUES ('$userIDToCheck');"; mysql_query($sql)or die(mysql_error()); echo "Done"; } Output : pi203713 Done But is database it is inserting "0"???

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  • Security Resources Defining, Static/Dynamic

    - by mmontalvo
    I am implementing a simple(hopefully) security manager within an application. Is it better to have predefined(static) roles, custom roles(dynamic)? I am leaning more towards dynamic groups or roles only because then it would not require a redeploy to update the system. Also, what would be the best approach to define resources in general? The application has a database that can hold either the static or dynamic values.

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  • How to write this kind of INI file

    - by menok
    I want to write a ini. file in MFC ,and I know those typical methods with section names, key names and key values. I`m wondering how to write a ini file which contains only a section name. a ini file like below ... [section] ... I have tried the function writeprivateprofilestring() with two NULL parameters but it failed.

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  • String literals and escape characters in postgresql

    - by rjohnston
    Attempting to insert an escape character into a table results in a warning. For example: create table EscapeTest (text varchar(50)); insert into EscapeTest (text) values ('This is the first part \n And this is the second'); Produces the warning: WARNING: nonstandard use of escape in a string literal (Using PSQL 8.2) Anyone know how to get around this?

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  • Preview for create/edit content doesn't work

    - by Snazzy
    Hi! I'm configuring a DRUPAL site web (that it was previously created) and I'm testing the diferent options. When I create a new content or edit a old content and change anything and then I click on 'Preview' doesn't appear the recent changes (just appear the old values), I have to save it before. NOTE: I do the accions as ROOT (it not a privilege problem). Anyone knows what is happened?

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  • Increasing JRE Memory Usage in Eclipse

    - by gMcizzLe
    I read in another question that you can increase the JRE memory allowance for an app through Window - Preferences in Eclipse, but I can't seem to find anything related to heap memory allocation. Editing -xms/xmx values in eclipse.ini doesn't help since those are for Eclipse itself.

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  • How to understand such C macro expansion

    - by upton
    A macro definition: #define HTTP_ERRNO_MAP(XX) \ /* No error */ \ XX(OK, "success") \ \ /* Callback-related errors */ \ XX(CB_message_begin, "the on_message_begin callback failed") \ XX(CB_url, "the on_url callback failed") \ /* Define HPE_* values for each errno value above */ #define HTTP_ERRNO_GEN(n, s) HPE_##n, enum http_errno { HTTP_ERRNO_MAP(HTTP_ERRNO_GEN) }; #undef HTTP_ERRNO_GEN After expand it by "gcc -E", enum http_errno { HPE_OK, HPE_CB_message_begin, HPE_CB_url,}; How does the macro expand to the result?

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