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  • Project Euler 79: what am I missing?

    - by Evert
    Hi Guys, I'm not interested in the answer, but I need to be pointed in the right direction Here's problem 79 I first try to analyze the file myself. I've noticed that the number 7 only ever appears as the first digit. This immediately implies that all the numbers containing 7 never overlaps with under numbers (on the left side). Since the questions in project euler always have 1 answer, I believe I'm misunderstanding the question. Do I not have to use all numbers? If I do have to use all numbers, there's many different possible numbers. Where am I going wrong?

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  • Which method of creating javascript objects is better?

    - by Germaine
    I've seen objects defined in two different ways, which function similarly, but are, of course, fundamentally different. You can do it either like this: var myobject = {property: 'hello', act: function() { this.property += ' world'; }}; and like this: function myobject() { this.property = 'hello'; this.act = function() { this.property += 'world'; } } The second method could create objects like so var newobj = new myobject(); but you could do something similar using the first notation by making the object the return value of a function. The new keyword has the advantage of being able to pass parameters that can be used to initialize the properties of the object, but you could just as easily add an init function to the first kind of object. Just wondering if besides these two differences, if there was a fundamental difference that made one method definitely better than the other method.

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  • Handling update errors in multiple records in the TClientDataset's ReconcileError method

    - by Fabio Gomes
    I'm trying to use the ReconcileError event to allow the user to correct the data after an update error which occurred in a specific record among others. Example: I have a dataset with one field and 3 records, this field have a unique constraint on the database, then I change one value to conflict when it reaches the database, then I call ApplyUpdates on the Dataset. This will generate an error (violation of unique constraint) in the provider and abort the applyupdates process, returning raAbort in the Action var of the ReconcileError method. In the ReconcileError method I tryied to use: Action := HandleReconcileError(aDataSet, UpdateKind, E); ** EDIT ** After debugging and dumping the DataSet records which were returned from the server, I noticed that there are 2 records in this Dataset, the first is the Old record and the second have all the changes I made to the first record. I'm a bit confused, will I always get this DataSet with 2 records? I thought that it should have only one record with the Old/New values. Thanks.

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  • Calling one DAO from another DAO?

    - by es11
    Can this ever make sense? Say I need to fetch an object from the DB which has a relation to another object (represented by a foreign key in the DB, and by a composition in my domain object). If in my first DAO I fetch the data for object 1, then call the dao for object 2, and finally (from within the first DAO, call the setter in object 1 and give it the previously fetched object 2). I know I could do a join instead, but it just seems more logical to me to decouple the functionality (which is why I am skeptical about calling one dao from another). Or should I move some of the logic to the service layer? Thanks Update: I think I solved the problem with help from the answers: all I needed to do was add the following to my mapping of Object 1: <one-to-one name="Object2" fetch="join" class="com...Object2"></one-to-one> I didn't have to change anything else. Thanks for the help!

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  • Casting To The Correct Subclass

    - by kap
    Hi Guys I hava a supeclass called Car with 3 subclasses. class Ford extends Car{ } class Chevrolet extends Car{ } class Audi extends Car{ } Now i have a function called printMessge(Car car) which will print a message of a particular car type. In the implementation i use if statements to test the instance of the classes like this. public int printMessge(Car car){ if((Ford)car instanceof Ford){ // print ford }else if((Chevrolet)car instanceof Chevrolet){ // print chevrolet }else if((Audi)car instanceof Audi){ // print Audi } } for instance if i call it for the first time with Ford printMessge(new Ford()), it prints the ford message but when i call it with printMessge(new Chevrolet()), i get EXCEPTION from the first if statement that Chevrolet cannot be cast to Ford. What am i doing wrong and what is the best way. thanks

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  • Module import error using IDLE

    - by Nimbuz
    I'm an absolute beginner using IDLE (Python 2.6.4) to learn the basics. I recently found a Python program that I want to run but it throws an error although the code looks fine (i.e all modules exist): from css.parse import parse data = """ em { padding: 2px; margin: 1em; border-width: medium; border-style: dashed; line-height: 2.4em; } p { color: red; font-size: 12pt } p:first-letter { color: green; font-size: 200% } p:first-line { color: blue }""" for rule in parse(data): print rule for decl in parse(data)[0]: print decl Error: ImportError: No module named parse How do I fix this? I'm using Snow Leopard. Edit: I guess its a PATH issue, where should I place the modules, which directory?

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  • iPhone - how to find a parent View

    - by Oscar Peli
    Hi there, I need some help to find a View inside a hierarchy. Here is how I build up the View stack. Inside my first UITableViewController I push an UIViewController that contains an UITabBarController: [[self navigationController] pushViewController:itemVC animated:YES]; Inside the UITabBarController I add an UITableViewController: ISSTableViewController *graphics = (ISSTableViewController *)[tabBarController.viewControllers objectAtIndex:3]; Inside the didSelectRowAtIndexPath I present a Modal View Controller using a UINavigationController: GraficoViewController *graph = [[GraficoViewController alloc] initWithNibName:@"GraficoViewController" bundle:nil]; UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:graph]; [self presentModalViewController:navigationController animated:YES]; [navigationController release]; Now the (BIG) question is: I have to hide the NagivationBar of my first UITableViewController inside my last view. I tried with this: [[[[[self parentViewController] parentViewController] parentViewController] navigationController] setNavigationBarHidden:YES]; but it doesn't work. Can someone tell me how I can find my ancestor View??? Thanks.

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  • Splitting a string according to a delimiter when elements in the string can contain the delimiter

    - by Vivin Paliath
    I have a string that looks like this: "#Text() #SomeMoreText() #TextThatContainsDelimiter(#blah) #SomethingElse()" I'd like to get back [#Text(), #SomeMoreText(), #TextThatContainsDelimiter(#blah), #SomethingElse()] One way I thought about doing this was to require that the # to be escaped into \#, which makes the input string: "#Text() #SomeMoreText() #TextThatContainsDelimiter(\#blah) #SomethingElse()" I can then split it using /[^\\]#/ which gives me: [#Text(), SomeMoreText, TextThatContainsDelimiter(\#blah), SomethingElse()] The first element will contain # but I can strip it out. However, is there a cleaner way to do this without having to escape the #, and which ensures that the first element will not contain a #? Basically I'd like it to split by # only if the # is not enclosed by parentheses. My hunch is that since the # is context-sensitive and and regular expressions are only suited for context-free strings, this may not be the right tool. If so, would I have to write a grammar for this and roll my own parser/lexer?

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  • Racket list in struct

    - by Tim
    I just started programming with Racket and now I have the following problem. I have a struct with a list and I have to add up all prices in the list. (define-struct item (name category price)) (define some-items (list (make-item "Book1" 'Book 40.97) (make-item "Book2" 'Book 5.99) (make-item "Book3" 'Book 20.60) (make-item "Item" 'KitchenAccessory 2669.90))) I know that I can return the price with: (item-price (first some-items)) or (item-price (car some-items)). The problem is, that I dont know how I can add up all Items prices with this. Answer to Óscar López: May i filled the blanks not correctly, but Racket mark the code black when I press start and don't return anything. (define (add-prices items) (if (null? items) (+ 0 items) ; Here I don't really know what to write for a 0. ; I tried differnt thnigs like null and this version. (+ (item-price (first some-items)) (add-prices (item-price (rest some-items))))))

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  • Modify on-the-fly verbose_name in a model field on django admin

    - by PerroVerd
    Hi I have this sample model working with the admin class Author(models.Model): name = models.CharField(_('Text in here'), max_length=100) with verbose_name set as ugettext_lazy 'Text in here', but sometimes, depending on the site_id i want to present a diferent verbose name, so I modified the init in this way def __init__(self, *args, **kwargs): super(Author, self).__init__(*args, **kwargs) #some logic in here self._meta.get_field('name').verbose_name = _('Other text') It works, displaying the 'Other text' instead the 'Text in here'... except for the very first time the author/add view is used. ¿Is it the right way to do it? ¿How can i fix the first time problem? Thanks in advance

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  • detachEvent not working with named inline functions

    - by Polshgiant
    I ran into a problem in IE8 today (Note that I only need to support IE) that I can't seem to explain: detachEvent wouldn't work when using a named anonymous function handler. document.getElementById('iframeid').attachEvent("onreadystatechange", function onIframeReadyStateChange() { if (event.srcElement.readyState != "complete") { return; } event.srcElement.detachEvent("onreadystatechange", onIframeReadyStateChange); // code here was running every time my iframe's readyState // changed to "complete" instead of only the first time }); I eventually figured out that changing onIframeReadyStateChange to use arguments.callee (which I normally avoid) instead solved the issue: document.getElementById('iframeid').attachEvent("onreadystatechange", function () { if (event.srcElement.readyState != "complete") { return; } event.srcElement.detachEvent("onreadystatechange", arguments.callee); // code here now runs only once no matter how many times the // iframe's readyState changes to "complete" }); What gives?! Shouldn't the first snippet work fine?

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  • Safari Back button not honouring PHP logout session

    - by Steve Kemp
    I've got a logout.php page which ends a user's session and works well and does the following: session_start(); session_unset(); session_destroy(); I've just noticed when testing with Safari that when you logout you can click the back button to return to the previous page which requires authentication but are not prompted. You cannot navigate away from this page without entering the navigation but it should not be displaying the previous page in the first place. So far in my testing this is only an issue with Safari on Mac OS X and there are a number of other reports about this but with no resolution that I could find: http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/Q_23702691.html I would love to be able to disable this behaviour with Safari's back button - surprised that this is happening in the first place. Thanks, Steve

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  • Windows API - Beginner help

    - by nXqd
    I try to create a very simple app using windows API. I've done some small apps in console. This is the first time I do with Win32 apps. I've searched and found a document from forgers which is recommended in this site. But I try to write very first line: #include <stdafx.h> #include <windows.h> int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { MessageBoxW (NULL, "Good bye Cruel World", "Note", MB_OK ); return 0; } But it doesn't work ( erased lines from default project created by VS 2008 and write these lines ) Waiting for your answers :)

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  • Which offer to pick?

    - by Shawn
    OK. This is kinda silly, but I'd really like to hear what you guys say. Here is the thing: I used to be an php developer and started looking for jobs 3 weeks ago and now I got 2 offers at hand. If I took the first one what I do would be 100% in PHP - simply dev works on a ecommerce project. If I go with the second one, the projects would be in python which I didn't have too much experiences on and is kinda exited about the new stuff I'm going to learn. But wait, the first offer gives more money(1k plus) and that's why I'm still hesitating and troubling you guys.) If you were me, which one would you pick? I know there could be other factors to be considered like 'which position is closer to your home so you could take good care of your dog', well let's forget about those things for now.

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  • Decoding a compressed short string; uncertain on compression used - Updated

    - by James
    Hi, I have a program that is compressing a string in an unknown way. I know a few inputs and the output produced, but I am not sure what is being used to compress the string. Here are my examples. (just 38 x a, no spaces or anything else) In: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" Out: "026900211AA63000026900"   (just 32 x a) In: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" Out: "0209001c1aa7a000020900" (31 x a, then 1 b) In: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab" Out: "0209000177c553c000020900" (31 x b, then 1 a) In: "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbba" Out: "0209001e7754f38000020900" In: "Hey wot u doing 2day u wanna do something" Out: "02990011C7C62E78CE6B8E3ACD83E81B37C5C5A6B9D1E1B06963DB5E71155C1000029900" (same as previous string, but with a space at the end) In: "Hey wot u doing 2day u wanna do something " Out: "02A90012C7718B9E339AE2EB360FA02CDF17177A674786DF4B1EDAF388AAE08000000002A90000" The only definite thing I can see so far is digit 2 and 3 are the amount of characters (hex value), ie first one is 26 = 38 Also the first 6 digits are repeated at the end Any help / advice would be great, thanks!

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  • Eager loading vs. many queries with PHP, SQLite

    - by Mike
    I have an application that has an n+1 query problem, but when I implemented a way to load the data eagerly, I found absolutely no performance gain. I do use an identity map, so objects are only created once. Here's a benchmark of ~3000 objects. first query + first object creation: 0.00636100769043 sec. memory usage: 190008 bytes iterate through all objects (queries + objects creation): 1.98003697395 sec. memory usage: 7717116 bytes And here's one when I use eager loading. query: 0.0881109237671 sec. memory usage: 6948004 bytes object creation: 1.91053009033 sec. memory usage: 12650368 bytes iterate through all objects: 1.96605396271 sec. memory usage: 12686836 bytes So my questions are Is SQLite just magically lightning fast when it comes to small queries? (I'm used to working with MySQL.) Does this just seem wrong to anyone? Shouldn't eager loading have given much better performance?

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  • Replace use of explode() with str_split()

    - by user289346
    $transData = fgets($fp); while (!feof ($fp)) { $transArry = explode(" ", $transData); $first = $transArry[0]; $last = $transArry[1]; $Sub = $transArry[2]; $Grade= $transArry[3]; echo "<table width='400' ><colgroup span='1' width='35%' /><colgroup span='2' width='20%' /> <tr><td> ".$first." ".$last." </td><td> ".$Sub." </td><td> ".$Grade." </td></tr></table>"; $transData = fgets($fp); } My teacher wants me to change this use of explode() to str_split() while keeping the same output. How do I do this?

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  • how to use found_rows in oracle package to avoid two queries

    - by Omnipresent
    I made a package which I can use like this: select * from table(my_package.my_function(99, 'something, something2', 1, 50)) I make use of the package in a stored procedure. Sample stored procedure looks like: insert into something values(...) from (select * from table(my_package.my_function(99, 'something, something2', 1, 50))) a other_table b where b.something1 = a.something1; open cv_1 for select count(*) from table(my_package.my_function(99, 'something, something2', 1, 50)) So I am calling the same package twice. first time to match records with other tables and other stuff and second time to get the count. Is there a way to get the count first time around and put it into a variable and second time around I just pick that variable rather than calling the whole query again? Hope it makes sense.

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  • Python TKinter connect variable to entry widget

    - by Sano98
    Hi everyone, I'm trying to associate a variable with a Tkinter entry widget, in a way that: Whenever I change the value (the "content") of the entry, mainly by typing something into it, the variable automatically gets assigned the value of what I've typed. Without me having to push a button "Update value " or something like that first. Whenever the variable gets changed (by some other part of the programm), I want the entry value displayed to be adjusted automatically. I believe that this could work via the textvariable. I read the example on http://effbot.org/tkinterbook/entry.htm, but it is not exactly helping me for what I have in mind. I have a feeling that there is a way of ensuring the first condition with using entry's "validate". Any ideas? Thank you for your input! Sano

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  • Font Times New Roman 11,25 Regular is not supported in telerik reporting.

    - by Tio
    Hi all.. I'm having some trouble exporting to PDF in Telerik Reporting Q2 2008. It seems that for some reason, exporting to PDF ( or printing, which is the same, it first exports to PDF, and then prints ), is giving me this error. First it started with Arial, I found the bug with the font Arial, replaced the textbox with Times New Roman, and it keeps on giving me this error. The strange thing, is that this only happens on the production server ( Windows Server 2008 ), on my development machine, this works flawlessly, I even tried to copy the fonts from my windows font folder, to my production server, but that didn't help anything... Does someone know what is happening? EDIT: Problem solved...a server reboot solved the problem instantly, unfortunately at the time I posted this question I couldn't do a server restart, later that day ( at night ) my boss restarted the server and all was good again.. Thanks all..

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  • UIViewController not oreintating. Methods not called

    - by capple
    Greetings, This question does seem to be an ongoing saga in the world of iphone SDK... so heres my contribution... Had two separate projects from the same template... one semi-works, the other not at all... Please let me explain my steps... used this basic GL ES template //iphonedevelopment.blogspot.com/2008/12/opengl-project-template-for-xcode.html had to sort out some of the 'Release' configuration but otherwises has eveything I need to add orientation to a GL ES project. One my first project, did my stuff, then added these methods.... -(BOOL)shouldAutoRotateToInterfaceOrientation ..... -(void)willRotateToInterfaceOrientation .... -(void)didRotateFromInterfaceOrientation .... -(void)willAnimateRotationToInterfaceOrientation .... And understand what they do (or are trying to do in my case), the (BOOL)should... gets called once when the view controller is created, and returns 'YES'. But after that none of the other methods are called! So I started from scratch with a blank template (GL ES one from above)...and added minimum to support auto rotation. But this time none of the methods get called! So I investigated .... //developer.apple.com/iphone/library/qa/qa2010/qa1688.html as it said, I added the GLViewController.view first, then added the GLview as subviews of the application delegate. Nothing! Then found this //www.iphonedevsdk.com/forum/iphone-sdk-development/44993-how-determine-ipad-launch-orientation.html which states to enable orientation notifications [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications]; and then subsequently disable them in the view controller... makes sense...did it, nothing... I think the notifications might be on by default though, since I didn't need to enable them in the first project, yet it still try to verify a orientation (i.e (BOOL)shouldAutoRotate... )... If any one could help me out it would be greatly appreciated as this issue is driving me insane. Thanks in advance. The code can be found here ... http://rapidshare.com/files/392053688/autoRotation.zip N.B These projects avoid nib/xib resources, would like to keep it that way if possible. P.S iPad device not out where I am so I cannot test on a device yet. Would be nice for it to work on the simulator.

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  • Wondering how Facebook does the "Mutual friends" feature

    - by Pierre
    Hello, I'm currently developing an application to allow students to manage their courses, and I don't really know how to design the database for a specific feature. The client wants, a lot like Facebook, that when a student displays the list of people currently in a specific course, the people with the most mutual courses are displayed first. As an additional feature, I would like to add a search feature to allow students to search for another one, and displaying first in the search results the people with most mutual courses. I currently use MySQL, I plan to use Cassandra for some other features, and I also use Memcached for result caching. Thanks.

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  • if_attribute syntax problem on declarative_authorization

    - by Victor Martins
    I have an Organization that has_many Affiliations And a mission that has_one Organization So i can do this: m = Mission.first m.organization.affiliations A user also has_many affiliations so I can do: u = User.first u.affiliations In declarative_authorization I want a user to be able to manage a mission if he is affiliated to the organization of the mission. I'm trying this: has_permission_on :missions, :to => [:manage] do if_attribute [:affiliations, {:mission => :organization} ] => intersects_with { user.affiliations.type_admin } end But I get the error: [:affiliations, {:mission=>:organization}] is not a symbol What's wrong with the syntax?

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  • jQuery Validate() special function

    - by kevin
    I'm using the jQuery validate() plugin for some forms and it goes great. The only thing is that I have an input field that requires a special validation process. Here is how it goes: The jQuery validate plugin is called in the domready for all the required fields. Here is an example for an input: <li> <label for="nome">Nome completo*</label> <input name="nome" type="text" id="nome" class="required"/> </li> And here is how I call my special function: <li> <span id="sprytextfield1"> <label for="cpf">CPF* (xxxxxxxxxxx)</label> <input name="cpf" type="text" id="cpf" maxlength="15" class="required" /> <span class="textfieldInvalidFormatMsg">CPF Inv&aacute;lido.</span> </span> </li> And at the bottom of the file I call the Spry function: <script type="text/javascript"> <!-- var sprytextfield1 = new Spry.Widget.ValidationTextField("sprytextfield1","cpf"); //--> </script> Of course I call the Spry CSS and JavaScript files in the head section as well as my special-validate.js. When I just use the jQuery validate() plugin and click on the send button, the page goes automatically back to the first mistaken input field and shows the error type (not a number, not a valid email etc.). But with this new function, this "going-back-to-the-first-mistake" feature doesn't work, of course, because the validate() function sees it all good. I already added a rule for another form (about pictures upload) and it goes like this: $("#commentForm").validate({ rules: { foto34: { required: true, accept: "jpg|png|gif" } } }); Now my question is, how can I add the special validation function as a rule of the whole validation process? Here is the page to understand it better: link text and the special field is the first one: CPF. I hope I was clear explaining my problem.

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  • jQuery CSS Custom Flyout Menu Styling Issue

    - by aherrick
    I'm close to nailing this flyout menu I have been working on, just have a couple of current pain points. I'm trying to get left/right padding on my submenu items, as you can see I am not quite there. Also when the first submenu is displayed, I want to create a bit of a gap between the first row of list items and the child. Below is my current code and a screen shot displaying what I want. Based on my current CSS, any thoughts on how to get this done in a clean way? <!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></title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script> <script type="text/javascript"> function mainmenu() { $("#nav ul").css({ display: "none" }); // Opera Fix $("#nav li").hover(function() { $(this).find('ul:first').css({ visibility: "visible", display: "none" }).show(400); }, function() { $(this).find('ul:first').css({ visibility: "hidden" }); }); } $(document).ready(function() { mainmenu(); }); </script> <style type="text/css"> * { padding: 0px; margin: 0px; } body { font-size: 0.85em; font-family: Verdana, Arial, Helvetica, sans-serif; } #nav, #nav ul { margin: 0; padding: 0; list-style-type: none; list-style-position: outside; position: relative; } #nav a { display: block; padding: 4px 0px 4px 0px; color: #dfca90; text-decoration: none; background-color: #ECE9D8; font-size: 9px; font-weight: bold; font: bold 15px Palatino, 'Palatino Linotype' , Georgia, serif; } #nav > li > a { font-size: 16px; font-variant: small-caps; border-right: 1px solid #dfca90; padding-right: 10px; padding-left: 10px; padding-bottom: 6px; padding-top: 6px; background-color: #fff; color: #dfca90; } #nav li ul li a:hover { color: #999; } #nav li { float: left; position: relative; } #nav ul { position: absolute; display: none; width: 170px; border: 2px solid #dfca90; } #nav ul li { } #nav li ul a { width: 170px; height: auto; float: left; } #nav ul ul { top: -2px; } #nav li ul ul { left: 170px; background-color: #ECE9D8; } #nav li:hover ul ul, #nav li:hover ul ul ul, #nav li:hover ul ul ul ul { display: none; } #nav li:hover ul, #nav li li:hover ul, #nav li li li:hover ul, #nav li li li li:hover ul { display: block; } </style> </head> <body> <ul id="nav"> <li><a href="#">1 HTML</a></li> <li><a href="#">2 CSS</a></li> <li><a href="#">3 Javascript </a> <ul> <li><a href="#">3.1 jQuery</a> <ul> <li><a href="#">3.1.1 Download</a> </li> <li><a href="#">3.1.2 Tutorial</a> </li> </ul> </li> <li><a href="#">3.2 Mootools</a></li> <li><a href="#">3.3 Prototype</a></li> </ul> </li> </ul> </body> </html>

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