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• How does the dataset determine the return type of a scalar query?

  - by Tobias Funke

  I am attempting to add a scalar query to a dataset. The query is pretty straight forward, it's just adding up some decimal values in a few columns and returning them. I am 100% confident that only one row and one column is returned, and that it is of decimal type (SQL money type). The problem is that for some reason, the generated method (in the .designer.cs code file) is returning a value of type object, when it should be decimal. What's strange is that there's another scalar query that has the exact same SQL but is returning decimal like it should. How does the dataset designer determine the data type, and how can I tell it to return decimal?

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• Silverlight Windows Phone 7: Load Images From URL

  - by Lennie De Villiers

  Hi, I got the code below that is trying to load an image from the web into an Image control, when I run it I get an error on the given line that no network access is allowed: private void button1_Click(object sender, RoutedEventArgs e) { WebClient webClientImgDownloader = new WebClient(); webClientImgDownloader.OpenReadCompleted += new OpenReadCompletedEventHandler(webClientImgDownloader_OpenReadCompleted); webClientImgDownloader.OpenReadAsync(new Uri("http://dilbert.com/dyn/str_strip/000000000/00000000/0000000/000000/80000/5000/100/85108/85108.strip.print.gif", UriKind.Absolute)); } void webClientImgDownloader_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e) { BitmapImage bitmap = new BitmapImage(); bitmap.SetSource(e.Result); // ERROR HERE! image1.Source = bitmap; } Silverlight for Windows Phone 7

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• What does it mean when a Perl method returns a "hashref"?

  - by Uri

  I'm trying to decrypt a Perl code which I'm not familiar with, somehow related to HashRef. I'm using Amazon::S3, but my question is a general Perl question. See the code below: use Amazon::S3; my $s3 = Amazon::S3->new( ... ); my $response = $s3->buckets; Documentation (here) sais, about s3-buckets: Returns undef on error, else HASHREF of results The following line is working for me, but I don't understand why: for $b in ( @ { $response->{buckets} } ) { print "bucket: " . $b->bucket . "\n"; } I'm Puzzled by each operator on the first line. What type exactly are $response, $respone->{bucket}. Looks like the expression within the for is an array, but I don't understand this syntax: @{ ... }?

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• Accessing Variables in Javascript using .length

  - by CoV

  Hey all, I'm pretty new to Javascript, so forgive me if this is a simple question. I'm trying to access the length of a set of checkboxes in a form using Javascript. However, I need to be able to change the "name" field of the checkboxes to check several different sets of them. Right now, my sample code looks like: var set = "set" + x; totalLength = optionBoxes.set.length; The variable x is being incremented by a for loop that wraps the whole thing and the name of the checkbox sets that I'm trying to access are set0, set1, set2, etc. Thanks. Edit: small typo fixes

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• Small questions on data structure

  - by John Graveston

  Hi, I'm trying to search the parent of a node with Kruskal's algorithm. My program works just fine, but I think I have heard of a method to improve the speed of the algorithm by reconstructing the tree while searching for the parent node and connecting it to the parent node. I'm pretty sure that I've heard of this somewhere, maybe in a lecture. Can anyone refresh my memory? And also, given a number of arrays, when searching for the minimum and the maximum value from a certain section of an array, what is the name of the tree that can calculate the minimum/maximum value from the array by making a binary tree that has the minimum/maximum value of each array in O(log N)?

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• How to pass multiple params to function in python?

  - by user1322731

  I am implementing 8bit adder in python. Here is the adder function definition: def add8(a0,a1,a2,a3,a4,a5,a6,a7,b0,b1,b2,b3,b4,b5,b6,b7,c0): All function parameters are boolean. I have implemented function that converts int into binary: def intTObin8(num): bits = [False]*8 i = 7 while num >= 1: if num % 2 == 1: bits[i] = True else: bits[i] = False i = i - 1 num /= 2 print bits return [bits[x] for x in range(0,8)] I want this function to return 8 bits. And to use this two functions as follows: add8(intTObin8(1),intTObin8(1),0) So the question is: How to pass 8 parameters using one function?

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• Wordpress & Vanity User URLs

  - by st4ck0v3rfl0w

  Hi All, Was wondering if anyone had any smart approaches to creating dynamic vanity user urls upon user registration. My site basically uses emails as usernames. I have the regex to strip the text before the "@" symbol (e.g. "[email protected]" becomes "name") I would then like to take the "name" and create a vanity url (e.g. domain.com/name or name.domain.com) Any thoughts on how to accomplish this with Wordpress? I'm a pretty advanced Wordpress user and my first thoughts were to do the following Verify user registration Upon successful user registration create page name with username as the title (this would help me achieve the www.domain.com/username) Apply preset template to that page with the desired view Any and all thoughts are welcome.

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• Rails: Link changes one attribute and then goes back

  - by James

  Rails newbie here. I have a list of items which can have a status represented by an integer (right now its just 1=active 0=inactive). What I want is next to each item a link to change the status of that item. So it might look like this: A nice item - Enable Another pretty item - Disable I can't think of how to make the link work. I just want a user to click the link and then the page refreshes and the item get updated. This doesn't work: <%= link_to "Enable", :controller => "items", :action => "update", :status => 1 %>

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• php/mysql question, retrieving information

  - by chance

  Hey SO, I have a question, pretty new at PHP and MySql but was curious is it possible to display only the most recent column to a table, from a database? I know it is possible to display a list of all information, or if you have just one column of information in your table to display that using the Here is my code for my basic script (just loads 1 column of information) I would like it to only print out the recent column i added to the table $con = mysql_connect ("localhost","username","password"); if (!$con) { die ('Could not connect:' . mysql_error()0; } mysql_select_db("db_name", $con); $result = mysql_query(Select column FROM table"); while($row = mysql_fetch_array($result)) { echo $row['column']; } mysql_close($con); * keep in mind, im not looking for someone to shoot me my code with it completed, though it would be handy, however just giving me the options of what I have to do, or what the script is called would be plentiful enough for my research, thanks!

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• Can entities be attached to an ISession that weren't previously attached?

  - by TheCloudlessSky

  I'm playing around with NHibernate 3.0. So far things are pretty cool. I'm trying to attach an entity that wasn't detached previously: var post = new Post(){ Id = 2 } session.Update(post); // Thought this would work but it doesn't. post.Title = "New Title After Update"; session.Flush(); Is this possible so that only Title gets updated? This is currently possible in EntityFramework. I'd like to not have to load Post from the database when I just need to update a few properties.

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• Can somebody tell me why this Jquery tooltip is not showing up?

  - by alex

  <link rel="stylesheet" type="text/css" href="jquery-tooltip/jquery.tooltip.css"/> <script type="text/javascript" src="jquery-tooltip/jquery.tooltip.js"></script> <div id="baby" title="My tootip">The text</div> <script type="text/javascript"> $(function(){ $('#baby').tooltip({ track: true, delay: 0, showURL: false, showBody: " - ", extraClass: "pretty", fixPNG: true, opacity: 0.95, left: -120 }); }); </script> The files are found, and they are not 404.

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• Ruby Hash.merge with specified keys only

  - by ba

  I'm pretty sure I saw on a Rails related site something along the lines of: def my_function(*opts) opts.require_keys(:first, :second, :third) end And if one of the keys in require_keys weren't specified, or if there were keys that weren't specified, an exception was raised. I've been looking through ActiveSupport and I guess I might be looking for something like the inverse of except. I like to try and use as much of the framework as possible compared to writing my own code, that's the reason I'm asking when I know how to make the same functionality on my own. :) At the moment I'm doing it through the normal merge routine and making sure that I have what I need with some IFs.

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• How to perform dynamic formatting with perl during write?

  - by Bee

  I have a format which is defined like below: format STDOUT = ------------------------------------ |Field1 | Field2 | Field3 | ------------------------------------ |@<<<<<<<<<<| @<<<<<<<<<<<| @<<<<< |~~ shift(@list1),shift(@list2),shift(@list3) ------------------------------------ . write STDOUT; So the questions are as below: Is it possible to make the list of values printed dynamic? e.g. If list 1 contains 12 elements, and if $flag1 is defined, then print only elements 0..10 instead of all 12. I tried doing this by passing $flag as a parameter to the sub which generates the report. However, the last defined FORMAT seems to always take precedence and the final write when it happens, applies the last format no matter what the condition is. Is it possible to also add/hide fields using the same process. e.g. If $flag2 is defined, then add an additional field Field4 to the list?

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• Hardcoding the resources in application

  - by HardCoder1986

  Hello! I have some code which shows a simple dialog box and handles user action (written using plain WinAPI). // Display dialog and handle user action LRESULT choice = DialogBoxParam(NULL, MAKEINTRESOURCE(AP_IDD_DIALOG), NULL, (DLGPROC)DialogCallback, NULL); Is there any way to hardcode the resource file dialog.rc, which is used to build the dialog ?(I would like to get rid of .rc files and I'm pretty sure there is a way, yet I don't know what it is :) Edit Also, does someone have any ideas on converting existing .rc files into hardcoded resources? Is this possible?

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• What is the Quicker / More Efficient CSS styling

  - by Sessa

  I have been curious as to which method of CSS styling is quicker (rendering wise) and then from simply a best practices perspective which method makes more sense (pretty subjective I would say?). I can create base classes like: .rounded-corners-5 { -moz-border-radius: 5px; -webkit-border-radius: 5px; border-radius: 5px; } OR I can do the other method of applying styles to multiple IDs/Classes: #box1, #header, #container, .titles { -moz-border-radius: 5px; -webkit-border-radius: 5px; border-radius: 5px; }

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• How set default opened JQuery UI tab another than first

  - by user568920

  I have big web application using JQuery UI Tabs. In central JS file I have setted all tabs. Using $("#tabs").tabs; But on one page I need to have selected another tab than first. If I use $("#tabs").{ selected: add }); (name of tab is #add) Its not running, probably because Tabs are already set up. Does anyone know how to set opened another than first tab (in default state - after loading page) if tabs are already turned on? I hope, you will understand, my English is pretty terrible.

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• Accessing Java Connector Architecture (JCA) from a Non-Managed environment

  - by Paul Kuykendall

  Hi, We have been using a JCA to interface with a low-level network resource from within WebSphere, however we have a requirement to be able to access the same network resource externally from Tomcat (i.e. not in a managed environment). The network communication and protocol layouts is very verbose, so we would rather not copy/paste several thousand lines of code (and then have to maintain them separately). From reading the JCA spec, there is supposedly some support to execute the code in a non-managed environment (such as Tomcat). Unfortunately, I have no idea what the interfaces are supposed to do, or how to call them from outside a managed environment (the spec is pretty vague). Are there any implementation examples out there that show how to modify a JCA to be usable in a non-managed environment? Thanks!

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• Rails - set POST request limit (file upload)

  - by Fabiano PS

  I am building a file uploader for Rails, using CarrierWave. I am pretty happy about it's API, except that I don't seem to be able to cut file uploads that exceed a limit on the fly. I found this plugin for validation, but the problem is that it happens after the upload is completed. It is completely unacceptable in my case, as any user could take the site down by uploading a huge file. So, I figure that the way would be to use some Rack configuration or middleware that will limit POST body size as it receives. I am hosting on Heroku, as context. *I am aware of https://github.com/dwilkie/carrierwave_direct but it doesn't solve my issue as I have to resize first and discard the original large image.

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• Can single-buffer blocking WSASend deliver partial data?

  - by CodeAngry

  I've pretty much always used send() with sockets and now I'm moving onto the WSA functions. With send(), I have a sendall() helper that ensured all data is delivered even if it didn't happen in one try and a partial send occurred on first call. So, instead of learning the hard way or over-complicating code when I don't have to, decided to ask you: Can a blocking WSASend() send partial data or does it send everything before it returns or fails? Or should I check the bytes sent vs. expected to send and keep at it until everything is delivered? ANSWER: Overlapped WSASend() does not send partial data but if it does, it means the connection has terminated. I've never encountered the case yet.

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• Django Project Done and Working. Now What?

  - by Rodrogo

  Hi, I just finished what I would call a small django project and pretty soon it's going live. It's only 6 models but a fairly complex view layer and a lot of records saving and retrieving. Of course, forgetting the obvious huge amount of bugs that will, probably, fill my inbox to the top, what would it be the next step towards a website with best performance. What could be tweaked? I'm using jmeter a lot recently and feel confident that I have a good baseline for future performance comparisons, but the thing is: I'm not sure what is the best start, since I'm a greedy bastard that wants to work the least possible and gather the best results. For instance, should I try an approach towards infrastructure, like a distributed database, or should I go with the code itself and in that case, is there something that specifically results in better performance? In your experience, whats pays off more? Personal anecdotes are welcome, but some fact based opinions are even more. :) Thanks very much.

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• Ignore document style rules in one element.

  - by panzi

  I write a greasemonkey script that adds sticky notes to websites. Because there sometimes are pretty strange style rules used in some websites the sticky notes sometimes turn up messed up (or at least not looking like I want them to look). Is there a way to say "under this element do not apply any generic stylerules"? So that rules associated with tag names are not applied, but rules associated with certain classes and ids still are. Or does anyone have a better idea on how to ensure that only my styles are applied to the sticky notes?

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• PHP: question about passing parameters in URL's

  - by user248959

  Hi, i have this two lines: var_dump($parametros_post_signin); $this->redirect('prueba/aux?email='.$parametros_post_signin['signin']); the first one prints this: array 'signin' => array 'email_address' => string '' (length=0) 'password' => string '' (length=0) the second one takes to another action where i have this code: var_dump($request->getParameter('email')); that prints this: string 'password' (length=8) I expected it to print something like this: string '' (length=0) What should i do to the get value of the 'email_address' field ? Regards Javi

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• Why doesn't the C++ default destructor destroy my objects?

  - by Oszkar

  The C++ specification says the default destructor deletes all non-static members. Nevertheless, I can't manage to achieve that. I have this: class N { public: ~N() { std::cout << "Destroying object of type N"; } }; class M { public: M() { n = new N; } // ~M() { //this should happen by default // delete n; // } private: N* n; }; Then this should print the given message, but it doesn't: M* m = new M(); delete m; //this should invoke the default destructor

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• validate XML with XSD in c++

  - by katl

  Hi! Im pretty new to both XML validation and C++ (more familiar with Java..) so I guess this is a trivial question. If I have a XML file and a XSD schema, how is the best way to validate them? Id like to to this in c++ without using external libraries, or as little libraries as possible, is it possible? Other ideas of how this can be done? I want a simple solution, the output needed is just if the validation i successful or not. Any help is appreciated // Katarina

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• log (1-var) operation in C

  - by heike

  I am trying to code this algorithm. I am stuck in the part of log((1.0-u)/u))/beta; As I understand, I can not get the result of this in C, as it will always return me with negative value log (returning imaginary value). Tried to print the result of log(1-5) for instance, it gives me with Nan. How can I get the result of double x = (alpha - log((1.0-u)/u))/beta then? Would appreciate for any pointers to solve this problem. Thank you

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