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  • Mutable objects and hashCode

    - by robert
    Have the following class: public class Member { private int x; private long y; private double d; public Member(int x, long y, double d) { this.x = x; this.y = y; this.d = d; } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + x; result = (int) (prime * result + y); result = (int) (prime * result + Double.doubleToLongBits(d)); return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj instanceof Member) { Member other = (Member) obj; return other.x == x && other.y == y && Double.compare(d, other.d) == 0; } return false; } public static void main(String[] args) { Set<Member> test = new HashSet<Member>(); Member b = new Member(1, 2, 3); test.add(b); System.out.println(b.hashCode()); b.x = 0; System.out.println(b.hashCode()); Member first = test.iterator().next(); System.out.println(test.contains(first)); System.out.println(b.equals(first)); System.out.println(test.add(first)); } } It produces the following results: 30814 29853 false true true Because the hashCode depends of the state of the object it can no longer by retrieved properly, so the check for containment fails. The HashSet in no longer working properly. A solution would be to make Member immutable, but is that the only solution? Should all classes added to HashSets be immutable? Is there any other way to handle the situation? Regards.

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  • jquery; django; parsing httpresponse

    - by Grinart
    hi_all() I have a problem with parsing http response.. I try send some values to client >>>>return HttpResponse(first=True,second=True) when parsing: $.post('get_values',"",function(data){ alert(data['first']); //The alert isn't shown!!! }); what is the right way to extract values from httpresponse maybe I make a mistake when create my response..

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  • How to implement this UI

    - by Michael
    Just curious if the tab bar UI element in screenshots is some built in class or customized. If it is customized, then please give me a hint on what classes I might check to have something like that. The first screenshot is initial tab bar. When I tap on the last icon the tab bar smoothly(animated) resize itself as on second screenshot. If I press the edit button the icons are shaking(as on iPhone home) and I'm able to arrange them. first second

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  • Get the subdomain from a URL

    - by jb
    Getting the subdomain from a URL sounds easy at first. http://www.domain.example Scan for the first period then return whatever came after the "http://" ... Then you remember http://super.duper.domain.example Oh. So then you think, okay, find the last period, go back a word and get everything before! Then you remember http://super.duper.domain.co.uk And you're back to square one. Anyone have any great ideas besides storing a list of all TLDs? John

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  • back button not leading to the respective tabs

    - by unni
    i have a ui jquery tabs and some listings under each tabs .on clicking the back button of these listings the first tab is always selected,not the respective tabs.the javascript history back is being used with the back button but it leads to the first tab always.please give a solution

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  • Cocoa's newbie question: is it possible to bind a NSTableView's selection to another tableview's selection?

    - by cocoaOverloaded
    http://img651.imageshack.us/img651/6999/modelsf.jpg Let'say, I've 2 entities in the Core Data's Model file, one being all "transactions" ever done by X company. The "transactions" entity has among other properties, a "DATE" property and a to-one relationship "COMPANY"(specifying the company with which X company has done that particular transaction). The other entity:"companies" of course contains all the companies' info ,with which X company has done transaction. The "companies" entity has a to-many relationships "TRANSACTIONS" which is an inverse relationship to "transactions" entity's "COMPANY" relationship. So within IB, I created a NSTableView(with its own NSArrayController) showing all the transactions on a particular Date (with the help of NSPredicate). Then I create another table view showing the to-many relationship "TRANSACTIONS" of the company of the selected transaction in the first table view(which shows transactions on a particular date). The 2nd table view's NSArrayController binding is like this: ** bind to: "name of the first tableview's controller", Controller Key: selection, Model Key Path:COMPANY.TRANSACTIONS(the to-many relationship in the "companies" entity)** Everythings work fine up to this moment, the 2nd tableview shows all the transactions X company has done with the company of the selected transactions in the 1st table view. But I have a group of textfields showing details of a particular transactions. Binding the these textfields with the controller of the 1st table view(the one showing transactions on a particular date) is pretty straightforward. But what I want to do are: 1/ Look up the transactions on a particular date in the first table view, select any one of them 2/ Then, check all previous transactions of the company of that transaction( selected in the first table view) from the 2nd table view 3/ Select any previous transactions and check the details of the transaction from that group of textfields So naturally I should have bind the textfields' gp to the 2nd table view's controller. But I found the default selected row in the 2nd table view(the one show all previous transactions of a company) wasn't the transaction I've selected in the 1st tableView for a particular date. Of course, i can manually select that transaction in the 2nd table view again.... So I just want to know if it's possible to have the 2nd table view automatically select the transaction according to the transaction I've selected in the 1st table view thr binding?? After hours of googling, I solved the problem by implementing the tableview Delegate protocol: - (void)tableViewSelectionDidChange:(NSNotification *)aNotification { if (["nameOf1stTableView" selectedRow] > -1) { NSArray *objsArray = ["nameOf2ndTableView'sController" arrangedObjects]; for (id obj in objsArray) { if ([[obj valueForKey:@"DATE"] isEqualToDate: ["nameOf1stTableView'sController".selection valueForKey:@"DATE"]]) { ["nameOf2ndTableView" selectRowIndexes:[NSIndexSet indexSetWithIndex:[objsArray indexOfObject:obj]] byExtendingSelection:NO]; } } } } But,this just look too cumbersome... can it be done with binding alone? Thanks in Advance,

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  • I want to learn programming. How should I start?

    - by metal-gear-solid
    If I'm going to learn programming first time, How i should start? I don't know programming yet but I'm good at XHTML and CSS. my main aim is to learn first Javascript than second PHP. after having good command in Javascript I'll move to PHP. Although i can use basic javascript, jquery, PHP scripts in my projects but know i want to learn programming concept and want to get good knowledge.

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  • Keep data with specific value on top when sorting a gridview

    - by aspNetAficionado
    Hi i have a gridview with information about documents: name, document type (policy, guidelines, forms, etc), category, etc. I want to sort the gridview alphabetically (name) and by document type, but always having the 'policy' above the other document types when document name is the same. How do I do that? eg If I do sort by DocumentName, DocumentType ('policy' maybe not be the first one in the list) but if I do sort by DocumentType , DocumentName (I would get for example all guidelines first in alphabetical order, then procedures, then policies, etc)

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  • All is working except if($_POST['submit']=='Update')

    - by user1319909
    I have a working registration and login system. I am trying to create a form where a user can add product registration info (via mysql update). I can't seem to get the db to actually update the fields. What am I missing here?!? <?php define('INCLUDE_CHECK',true); require 'connect.php'; require 'functions.php'; // Those two files can be included only if INCLUDE_CHECK is defined session_name('tzLogin'); // Starting the session session_set_cookie_params(2*7*24*60*60); // Making the cookie live for 2 weeks session_start(); if($_SESSION['id'] && !isset($_COOKIE['tzRemember']) && !$_SESSION['rememberMe']) { // If you are logged in, but you don't have the tzRemember cookie (browser restart) // and you have not checked the rememberMe checkbox: $_SESSION = array(); session_destroy(); // Destroy the session } if(isset($_GET['logoff'])) { $_SESSION = array(); session_destroy(); header("Location: index_login3.php"); exit; } if($_POST['submit']=='Login') { // Checking whether the Login form has been submitted $err = array(); // Will hold our errors if(!$_POST['username'] || !$_POST['password']) $err[] = 'All the fields must be filled in!'; if(!count($err)) { $_POST['username'] = mysql_real_escape_string($_POST['username']); $_POST['password'] = mysql_real_escape_string($_POST['password']); $_POST['rememberMe'] = (int)$_POST['rememberMe']; // Escaping all input data $row = mysql_fetch_assoc(mysql_query("SELECT * FROM electrix_users WHERE usr='{$_POST['username']}' AND pass='".md5($_POST['password'])."'")); if($row['usr']) { // If everything is OK login $_SESSION['usr']=$row['usr']; $_SESSION['id'] = $row['id']; $_SESSION['email'] = $row['email']; $_SESSION['first'] = $row['first']; $_SESSION['last'] = $row['last']; $_SESSION['address1'] = $row['address1']; $_SESSION['address2'] = $row['address2']; $_SESSION['city'] = $row['city']; $_SESSION['state'] = $row['state']; $_SESSION['zip'] = $row['zip']; $_SESSION['country'] = $row['country']; $_SESSION['product1'] = $row['product1']; $_SESSION['serial1'] = $row['serial1']; $_SESSION['product2'] = $row['product2']; $_SESSION['serial2'] = $row['serial2']; $_SESSION['product3'] = $row['product3']; $_SESSION['serial3'] = $row['serial3']; $_SESSION['rememberMe'] = $_POST['rememberMe']; // Store some data in the session setcookie('tzRemember',$_POST['rememberMe']); } else $err[]='Wrong username and/or password!'; } if($err) $_SESSION['msg']['login-err'] = implode('<br />',$err); // Save the error messages in the session header("Location: index_login3.php"); exit; } else if($_POST['submit']=='Register') { // If the Register form has been submitted $err = array(); if(strlen($_POST['username'])<4 || strlen($_POST['username'])>32) { $err[]='Your username must be between 3 and 32 characters!'; } if(preg_match('/[^a-z0-9\-\_\.]+/i',$_POST['username'])) { $err[]='Your username contains invalid characters!'; } if(!checkEmail($_POST['email'])) { $err[]='Your email is not valid!'; } if(!count($err)) { // If there are no errors $pass = substr(md5($_SERVER['REMOTE_ADDR'].microtime().rand(1,100000)),0,6); // Generate a random password $_POST['email'] = mysql_real_escape_string($_POST['email']); $_POST['username'] = mysql_real_escape_string($_POST['username']); $_POST['first'] = mysql_real_escape_string($_POST['first']); $_POST['last'] = mysql_real_escape_string($_POST['last']); $_POST['address1'] = mysql_real_escape_string($_POST['address1']); $_POST['address2'] = mysql_real_escape_string($_POST['address2']); $_POST['city'] = mysql_real_escape_string($_POST['city']); $_POST['state'] = mysql_real_escape_string($_POST['state']); $_POST['zip'] = mysql_real_escape_string($_POST['zip']); $_POST['country'] = mysql_real_escape_string($_POST['country']); // Escape the input data mysql_query(" INSERT INTO electrix_users(usr,pass,email,first,last,address1,address2,city,state,zip,country,regIP,dt) VALUES( '".$_POST['username']."', '".md5($pass)."', '".$_POST['email']."', '".$_POST['first']."', '".$_POST['last']."', '".$_POST['address1']."', '".$_POST['address2']."', '".$_POST['city']."', '".$_POST['state']."', '".$_POST['zip']."', '".$_POST['country']."', '".$_SERVER['REMOTE_ADDR']."', NOW() )"); if(mysql_affected_rows($link)==1) { send_mail( '[email protected]', $_POST['email'], 'Your New Electrix User Password', 'Thank you for registering at www.electrixpro.com. Your password is: '.$pass); $_SESSION['msg']['reg-success']='We sent you an email with your new password!'; } else $err[]='This username is already taken!'; } if(count($err)) { $_SESSION['msg']['reg-err'] = implode('<br />',$err); } header("Location: index_login3.php"); exit; } if($_POST['submit']=='Update') { { mysql_query(" UPDATE electrix_users(product1,serial1,product2,serial2,product3,serial3) WHERE usr='{$_POST['username']}' VALUES( '".$_POST['product1']."', '".$_POST['serial1']."', '".$_POST['product2']."', '".$_POST['serial2']."', '".$_POST['product3']."', '".$_POST['serial3']."', )"); if(mysql_affected_rows($link)==1) { $_SESSION['msg']['upd-success']='Thank you for registering your Electrix product'; } else $err[]='So Sad!'; } if(count($err)) { $_SESSION['msg']['upd-err'] = implode('<br />',$err); } header("Location: index_login3.php"); exit; } if($_SESSION['msg']) { // The script below shows the sliding panel on page load $script = ' <script type="text/javascript"> $(function(){ $("div#panel").show(); $("#toggle a").toggle(); }); </script>'; } ?>

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  • question related to UITextView

    - by user177893
    I have n number of UITextview and that are added to UIScrollview.and uiscrollview is added to self.view.Now,I want that 1If user enter text in first UITextview ,then as lenth increase os UITextview ,another UITextviews which are below it also reinitialize and maintain properly according to the size of first UITextView.inshort another UITextviews go more below then it was. 2It should work in any of the case ,wether user presses return key after entering text into UITextView or may be not till end

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  • how to add a "Please select" to a dropdown box

    - by oo
    i have the following code in an asp.net mvc view. <% = Html.DropDownList("Filter", new SelectList(Model.Items, "Id", "Name", 0), new { @id = "Filter", @class = "autoComplete1" })%> i want to add an element at the top of the dropdown as the first item that says, "Please select". do i have to add that into my Model.Items or is there a way i can add that element into the view and ignore the selection of that first element ??

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  • proper way to hide dynamic elements with jQuery

    - by GrandVizier
    I have a div element which my code will fill with a dynamic amount of links. Using jquery, I want to hide all the links except the first one. This is what I came up with and it works, I was just wondering if this is the best way to do it: $("#panelContainer").each(function(n) { $(this).children().hide(); $("#panelContainer a:first").show(); });

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  • Find all occurrences of a substring in Python

    - by cru3l
    Python has string.find() and string.rfind() to get the index of a substring in string. I wonder, maybe there is something like string.find_all() which can return all founded indexes (not only first from beginning or first from end)? For example: string = "test test test test" print string.find('test') # 0 print string.rfind('test') # 15 #that's the goal print string.find_all('test') # [0,5,10,15]

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  • Jquery get links where id is empty

    - by gulbaek
    Hi I need to change the font color on the first link. <a href="/default.aspx" class="content">Frontpage</a> <a href="/default.aspx" class="content" id="product_randomnumber_link">Frontpage</a> But I just can't figure out a way to only select the first a.

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  • Jquery : Do a function only once in ajax load

    - by thundercat
    Hi! Im trying to do a simple fadeIn ONCE for the first div , but the problem is that this is a ajax load inside a everyTime(xxx sec), so it does the same thing everytime it loads again. anyone got any ideas on how i can prevent the first div to fadeIn over and over again, but still do this function on the new div? Not very familiar with Jquery.. so feed me with a spoon :)

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  • C#: Installing a new version over old version

    - by sbenderli
    I have a deployment project which will not let me install over an older version. The msi file says to uninstall the program first from Add/Remove programs. This is not a good user experience. How can I do it so that the installer will simply remove the software first and then install the new version?

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  • Focus problem with multiple EditText's.

    - by Ashish
    I have an activity with two edittext controls. I am calling the requestFocus on the second edittext field since by default the focus goes to the first edittext control. The focus appears to be in the second edittext field (the second one gets the highlighted border), but if we try to enter any characters using the hardware keyboard the text appears in the first edittext control. Any ideas why it would be happening?

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  • Entering to index page?

    - by FullmetalBoy
    // // Post: /Search/Alternativ1/txtBoxTitle) [HttpPost] public ActionResult Alternativ1(int txtBoxTitle) { SokningMedAlternativ1 test= new SokningMedAlternativ1(); if (txtBoxTitel != null) { var codeModel = test.FilteraBokLista(txtBoxTitel); } return View(codeModel); } Problem: I have problem to find a solution to go back to my index page (first page when entering a website for the first time) view if txtBoxTitle has null. My request: How shall I enter to my index page view automatically if txtBoxTitle contains null? // Fullmetalboy

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  • zebra stripes over riding my highlighting color

    - by pfaaf
    I am using this code to navigate through keyboard in table grid.In my code i have not added this zebra stripes coding.If i add this zebra stripes is overriding my highlighting. eg:first row dark color and second row white color.I can see highlight through keyboard in first row but i can see in second row. [http://jsfiddle.net/hKZqS/15/] This coding for zebra stripes $("#myTable").tablesorter({ widgets: ['zebra']} ); I have an alternate solution is using border but how do i apply it here in my css.

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  • Whats the difference between theese two java code snippets?

    - by Joe Hopfgartner
    I have this code i am doing for university. The first code works as expected, the second one provides different results. I can not see what they are doing differently?? first: public Mat3 getNormalMatrix() { return new Mat3(this.getInverseMatrix()).transpose(); } second: public Mat3 getNormalMatrix() { Mat4 mat = this.getInverseMatrix(); Mat3 bla = new Mat3(mat); bla.transpose(); return bla; }

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  • MySQL very slow compared to MS Access when inserting hundred of thousands of rows ! So is there a my

    - by asksuperuser
    I am currently adding hundred of thousands of rows of data to a table first on a MS Access Table then on a MySQL Table. I first tried with MS Access, it tooks less than 40 seconds. Then I tried exactly with the same source and with the same table structure to MySQL and it took 6 min and 40 seconds that is 1000% slower !!! So is there a myth that a database server is more performant ?

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  • observing multiple select menus with prototype

    - by snaken
    Hi, I want to observe multiple select menus and respond to their changes using prototype but only the first menu seems to be observed. This is my code: $('product_options').select('select').invoke("observe","change",optchange); If there are - for example - 3 selects within product_options then it only observes the first, i thought it might be because of invoke so i then tried this: $('product_options').select('select').each(function(sel){ $(sel).observe("change",optchange); }); Still doesnt work though, any ideas whats wrong?

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  • JQueryLightbox plugin (0.5)

    - by Janine
    I have inlcuded a JQuery Lightbox plugin on my first site and for some reason it is not showing the gallery images on click. the first one works but the others are blank. I built the site in Dreamweaver and it worked fine in testing on Safari and Firefox but the live version isn't playing ball. Any suggestions.

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