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• When should I observe javascript events on window vs. document vs. document.body?

  - by brahn

  I'm using prototype.js for my web app, and I have everything running on chrome, safari, and firefox. I am now working on IE8 compatibility. As I've been debugging in IE, I've noticed that there are javascript events for which I have previously set an observer on the window, e.g. Event.observe(window, eventType, function () {...}); (where eventType might be "dom:loaded", "keypress", etc.) and it works just fine in Chrome/Safari/Firefox. However, in IE the observer never fires. In at least some cases I could get this to work on IE by instead placing the observer on something other than window, e.g. document (in the case of "dom:loaded") or document.body (in the case of "keypress"). However, this is all trial-and-error. Is there some more systematic way to determine where to place these observers such that the results will be cross-browser compatible? Thanks!

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• Resize image while rotating image in android

  - by dhams

  Hi every one ,,m working with android project in which i want to rotate image along with touch to some fix pivot point ,,,i have completed all the things but i have facing one problem ,,,while m trying to rotate image the image bitmap is resize....i dont have any idea why it occur ....if somebody have den please give me idea to come over this problem.... my code is below ..... package com.demo.rotation; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Matrix; import android.os.Bundle; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.widget.ImageView; import android.widget.ImageView.ScaleType; public class temp extends Activity{ ImageView img1; float startX; float startX2 ; Bitmap source; Bitmap bitmap1 = null; double r; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); img1 = (ImageView) findViewById(R.id.img1); img1.setOnTouchListener(img1TouchListener); bitmap1 = BitmapFactory.decodeResource(getResources(), R.drawable.orsl_circle_transparent); } private OnTouchListener img1TouchListener = new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_MOVE: Log.d("MOVE", "1"); if(source!=null) r = Math.atan2(event.getX() - source.getWidth(), (source.getHeight() / 2) - event.getY()); Log.i("startX" + event.getX(), "startY" + event.getY()); rotate(r,bitmap1, img1); img1.setScaleType(ScaleType.CENTER); break; case MotionEvent.ACTION_DOWN: break; case MotionEvent.ACTION_UP: break; default : break; } return true; } }; private void rotate(double r , Bitmap currentBitmap ,ImageView imageView ) { int rotation = (int) Math.toDegrees(r); Matrix matrix = new Matrix(); matrix.setRotate(rotation, currentBitmap.getWidth()/2, currentBitmap.getHeight()/2); source = Bitmap.createBitmap(currentBitmap, 0, 0, currentBitmap.getWidth(), currentBitmap.getHeight(), matrix, false); imageView.setImageBitmap(source); Log.i("HIGHT OF CURRENT BITMAP", ""+source.getHeight()); } }

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• Changing Base Path In PHP

  - by Joshua

  I need to change the folder that "relative include paths" are based on. I might currently be "in" this folder: C:\ABC\XYZ\123\ZZZ And in this case, the path "../../Source/SomeCode.php" would actually be in this folder: C:\ABC\XYZ\Source And realpath('.') would = 'C:\ABC\XYZ\123\ZZZ'; If however, realpath('.') were "C:\Some\Other\Folder" Then in this case, the path "../../Source/SomeCode.php" would actually be in this folder: C:\Some\Source How do I change what folder is represented by '.' in realpath()? Like this: echo ('BEFORE = '.realpath('.')); // BEFORE = C:\ABC\XYZ\123\ZZZ // Some PHP code here... echo ('AFTER = '.realpath('.')); // AFTER = C:\Some\Other\Folder How can I change the folder represented by '.', as seen by realpath()?

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• quantity of measurable units design pattern

  - by Berryl

  Hello I am thinking through a nice pattern to be useful across domains of measurable units (ie, Length, Time) and came up with the following use case and initial classes, and of course, questions! 1) Does a Composite pattern help or complicate? 2) Should the Convert method(s) in the ComposityNode be a separate converter class? All comments appreciated. Cheers, Berryl Example Use Case: var inch = new ConvertableUnit("inch", 1) var foot = new ConvertableUnit("foot", 12) var imperialUnits = new CompositeConvertableUnit("imperial units", .024) imperialUnits.AddChild(inch) imperialUnits.AddChild(foot) var meter = new ConvertableUnit("meter", 1) var millimeter = new ConvertableUnit("millimeter ", .001) var imperialUnits = new CompositeConvertableUnit("metric units", 1) imperialUnits.AddChild(meter) imperialUnits.AddChild(millimeter) var oneInch = new Quantity(1, inch); var oneFoot = new Quantity(1, foot); oneFoot.ToBase() // "12 inches" var oneMeter = new Quantity(1, meter); oneInch.ToBase() // .024 meters Possible Solution ConvertableUnit : Node double Rate string Name Quantity ConvertableUnit Unit double Amount CompositeConvertableUnit : Node ISet<ConvertableUnit> _children ConvertableUnit BaseUnit {get{ return _children.Where(c=>c.Rate == 1).First() } } Quantity ConvertTo(Quantity from, Quantity to) Quantity ToBase(Quantity from);

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• Running Script before/after Variables declared?

  - by Sam

  Hi folks. As i understand javascript .js files are best to put all the way at the bottom of html pages, to speed up loading of rest of page. Advised by Yslow(Yahoo) and Page Speed(google). Now, when in the middle of page some thing RUNS a javascript script, in Internet Explorer, i see a small warning message saying that the element is: Uncaught ReferenceError: SWFObject is not defined When i put my all.js file in the had, the error goes away but page load slows doen. What to do? Actually, i remember it was the same with php variables. If i RUN php but the variable comes later, then it just doesnt work. must define the variable first, for it to run. How to make this workflow better, in case of php scripts? and in case of javsscripts? Thanks!

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• How to use a separate class to validate credit card numbers in C#

  - by EvanRyan

  I have set up a class to validate credit card numbers. The credit card type and number are selected on a form in a separate class. I'm trying to figure out how to get the credit card type and number that are selected in the other class (frmPayment) in to my credit card class algorithm: public enum CardType { MasterCard, Visa, AmericanExpress } public sealed class CardValidator { public static string SelectedCardType { get; private set; } public static string CardNumber { get; private set; } private CardValidator(string selectedCardType, string cardNumber) { SelectedCardType = selectedCardType; CardNumber = cardNumber; } public static bool Validate(CardType cardType, string cardNumber) { byte[] number = new byte[16]; int length = 0; for (int i = 0; i < cardNumber.Length; i++) { if (char.IsDigit(cardNumber, i)) { if (length == 16) return false; number[length++] = byte.Parse(cardNumber[i]); //not working. find different way to parse } } switch(cardType) { case CardType.MasterCard: if(length != 16) return false; if(number[0] != 5 || number[1] == 0 || number[1] > 5) return false; break; case CardType.Visa: if(length != 16 & length != 13) return false; if(number[0] != 4) return false; break; case CardType.AmericanExpress: if(length != 15) return false; if(number[0] != 3 || (number[1] != 4 & number[1] != 7)) return false; break; } // Use Luhn Algorithm to validate int sum = 0; for(int i = length - 1; i >= 0; i--) { if(i % 2 == length % 2) { int n = number[i] * 2; sum += (n / 10) + (n % 10); } else sum += number[i]; } return (sum % 10 == 0); } }

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• Anyone up to creating a tomcat based alternative for GAE?

  - by bach

  Hi, If we had the possibility to run GAE app without any code change on our servlet engine that would be great because: in case that google changes their billing policy we can just jump to our own server or in case their current policy doesn't fit our app needs we can do stuff which is not allowed in the GAE, compromising a 1 JVM, 1 DB We don't actually need a distributed system but more of a realtime system with synchronize, true locking mechanisms, other servers/software installed on the server machine, socket interface etc... Such a package should include at least: TomCat (or equivalent) DataNucleus Access Platform (Task Queue service) Any idea if it's easy to get such a thing or if it's already exist somewhere? Thanks

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• Dynamic expansion of a Crystal report...

  - by Chathuranga Chandrasekara

  I have a crystal report consisting of several pages. Each page consists of a several fields that are populated from database. Suppose the following example : Name : aaaaaa Education Background:bbbbbbb Age:cc In my case the Education Background's details (bbbbbbb here) may consist of several words or several pages. If I set a large space for it, it will waste a big space on report (Yes. May be a paper) in a case of short answer. How can I eliminate this problem? Does crystal reports provide a way to dynamically expand the space?

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• Spring bean's DESTROY-METHOD attribute [does not work for me]

  - by EugeneP

  Can get work the attribute "destroy-method". First, even if I type non-existing method name into "destroy-method" attribute, Spring initialization completes fine (already strange!). Next, when a bean has a "prototype" scope, then I suppose it must be destroyed before the application is closed. That not happens, it is simply never called in my case. Though, after extracting this bean I can call this method explicitly and it does its job. Could you explain why this method is never called in my Spring 2.5 case? p.s. The method exists, it is public and has no arguments.

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• the markup document following the root element must be well formed

  - by Sunny Mate

  hi i am getting the following error while saving my faces-config.xml the markup document following the root element must be well formed and my xml is UserBean com.jsfcompref.register.UserBean session <from-view-id>/register.jsp</from-view-id> <navigation-case> <from-outcome>register</from-outcome> <to-view-id>/confirm.jsp</to-view-id> </navigation-case> i have closed all the tags proerly still i am getting this error any help pls thanks in advance Sunny Mate

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• If you have an application localized in pt-br and pt-pt, what language you should choose if the syst

  - by Sorin Sbarnea

  If you have an application localized in pt-br and pt-pt, what language you should choose if the system is reporting only pt code (generic Portuguese)? This question is independent of the nature of the application, desktop, mobile or browser based. Let's assume you are not able to get region information from another source and you have to choose one language as the default one. The question does apply as well for more case including: * pt-pt and pt-br * en-us and en-gb * fr-fr and fr-CA * zh-cn, zh-tw, .... - in fact in this case I know that zh can be used as predominant language for Simplified Chinese where full code is zh-hans. For zh-tw, zh-hant-tw, zh-hk, zh-mo the proper code (canonical) should be zh-hant. In fact the question can be extended to: How to I determine the predominant languages for a specified meta-language? I need a solution that will include at least Portuguese, English and French.

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• Redundancy algorithm for reading noisy bitstream

  - by Tedd Hansen

  I'm reading a lossy bit stream and I need a way to recover as much usable data as possible. There can be 1's in place of 0's and 0's in palce of 1's, but accuracy is probably over 80%. A bonus would be if the algorithm could compensate for missing/too many bits as well. The source I'm reading from is analogue with noise (microphone via FFT), and the read timing could vary depending on computer speed. I remember reading about algorithms used in CD-ROM's doing this in 3? layers, so I'm guessing using several layers is a good option. I don't remember the details though, so if anyone can share some ideas that would be great! :) Edit: Added sample data Best case data: in: 0000010101000010110100101101100111000000100100101101100111000000100100001100000010000101110101001101100111000101110000001001111011001100110000001001100111011110110101011100111011000100110000001000010111 out: 0010101000010110100101101100111000000100100101101100111000000100100001100000010000101110101001101100111000101110000001001111011001100110000001001100111011110110101011100111011000100110000001000010111011 Bade case (timing is off, samples are missing): out: 00101010000101101001011011001110000001001001011011001110000001001000011000000100001011101010011011001 in: 00111101001011111110010010111111011110000010010000111000011101001101111110000110111011110111111111101 Edit2: I am able to controll the data being sent. Currently attempting to implement simple XOR checking (though it won't be enough).

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• how to avoid returning mocks from a mocked object list

  - by koen

  I'm trying out mock/responsibility driven design. I seem to have problems to avoid returning mocks from mocks in the case of finder objects. An example could be an object that checks whether the bills from last month are paid. It needs a service that retrieves a list of bills for that. So I need to mock that service that retrieves the bills. At the same time I need that mock to return mocked Bills (since I don't want my test to rely on the correctness bill implementation). Is my design flawed? Is there a better way to test this? Or is this the way it will need to be when using finder objects (the finding of the bills in this case)?

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• Using .htaccess to replace backslash in URL with forward-slash

  - by DamienL

  I realise that a backslash should never appear in a URL in a form other than a URL escape code, however in this case the URL's are being generated by a .NET application for generating flashbooks. I have contacted the developer of this application with a bug report. In the interim i would like to use .htaccess to rewrite the offending backslashes. This is how the URLs appear in fiddler debugging proxy. www.example.com/folder/folder/thumbs%5C1.jpg I am using Firefox and it looks as though Firefox is translating them into the URL encoded equivalent ( \ == %5C1 ). Interestingly IE translates the backslash into a forward-slash automatically (not adhering to standards but convenient in this case). Is there a way to use .htaccess to rewrite all \ to /?

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• Partition of tables in MySQL

  - by Joel

  Hello, I have read that in a case where a table has many columns, but most of the time only one of them is used (say a title column in a forum post), a way to increase performance would be a partition to two tables, where one will contain only the title and the other one will contain the other columns (such as the forum post body). However, in case I use select ForumTitle from Forum; won't that be good enough to prevent the load of all columns (such as the forum post's body) to the memory, and eliminate the need of partition? Thanks, Joel

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• implicit parameter definition in class

  - by coubeatczech

  implicit val odkaz = head; def vypis(implicit odkaz:Prvek):String = { odkaz match{ case null => "" case e => e.cislo + " " + e.pocet + "\n" + vypis(e.dalsi) } } ... def main(args:Array[String]){ val q = new MyQueue() // insert some values println(q.vypis) } This method(vypis) is a member of an queue-class so I'll always want to implicity start the recursion from the start of the queue, when calling the method from outside. Is there a way how to write it, that the method from outside calling, there's no paramter, but in inside, there's a parameter - for recursion...? The compiler complains that the parameter is not defined when called from outside

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• How to close an oracle db connection from php on an apache server? I mean close instantly.

  - by Valentin Jacquemin

  Usually closing a connection is simply done by oci_clone($connection); or in a worse case when the php script ends the connection pass away. In my case however, I face a different behavior. If I access my application which uses PHP 5.2.8, Apache 2.2.11 and oci8 1.2.5, the connection is kept during several minutes. Actually it seems to: if I launch netstat -b I see that the process httpd.exe remains with the ESTABLISHED status on the database's URL during a while (a few minutes). Could someone enlighten me on that behavior? P.S. I do not use persistent connections.

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• How to shrink-to-fit an std::vector in a memory-efficient way?

  - by dehmann

  I would like to 'shrink-to-fit' an std::vector, to reduce its capacity to its exact size, so that additional memory is freed. The standard trick seems to be the one described here: template< typename T, class Allocator > void shrink_capacity(std::vector<T,Allocator>& v) { std::vector<T,Allocator>(v.begin(),v.end()).swap(v); } The whole point of shrink-to-fit is to save memory, but doesn't this method first create a deep copy and then swaps the instances? So at some point -- when the copy is constructed -- the memory usage is doubled? If that is the case, is there a more memory-friendly method of shrink-to-fit? (In my case the vector is really big and I cannot afford to have both the original plus a copy of it in memory at any time.)

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• How can web form content be preserved for the back button

  - by Peter Howe

  When a web form is submitted and takes the user to another page, it is quite often the case that the user will click the Back button in order to submit the form again (the form is an advanced search in my case.) How can I reliably preserve the form options selected by the user when they click Back (so they don't have to start from scratch with filling the form in again if they are only changing one of many form elements?) Do I have to go down the route of storing the form options in session data (cookies or server-side) or is there a way to get the browser to handle this for me? (Environment is PHP/JavaScript - and the site must work on IE6+ and Firefox2+)

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• Squeak - SUnit Testing for Errors

  - by Artium

  I have been suggested to use should:rise in my test case to test for errors that a method might raise. For some reason it does not work as axpected, so I want to verify that I'm doing it right. Here is the code in the test case: self should: [aMyClass compareTo: 'This is a string'] raise: 'invalid input'. My compareTo/1 method looks like this: (aMyClass isKindOf: MyClass) ifFalse: [self error: 'invalid input'.]. The test runner output is that there is "1 errors". Thank you.

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• wp_redirect acting weird. requires die() afterward?

  - by Joseph Carrington

  I am writing a wordpress plugin that redirects the user. for some reason, wp_redirect does not work as think it should, namely: it seems not to redirect the user at all, unless I put a die command in directly after. here is some code: switch($_GET['wp_favorites_tax']) { case 'post_tag': wp_redirect(add_query_arg('tag', $_GET['wp_favorites_term'], get_bloginfo('url'))); die(); break; case 'category': wp_redirect(add_query_arg('cat', $_GET['wp_favorites_term'], get_bloginfo('url'))); die(); break; default: wp_redirect(get_bloginfo('url')); die(); } It seems really strange to me that I should have to tell my script to die so that the redirect can work. I have also tried a basic header("Location: $location); to similar ends, ie: it still requires the die() in order to work. really perplexing me. Thanks.

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• Best practice Unit testing abstract classes?

  - by Paul Whelan

  Hello I was wondering what the best practice is for unit testing abstract classes and classes that extend abstract classes. Should I test the abstract class by extending it and stubbing out the abstract methods and then test all the concrete methods? Then only test the methods I override and the abstract methods in the unit tests for objects that extend my abstract class. Should I have an abstract test case that can be used to test the methods of the abstract class and extend this class in my test case for objects that extend the abstract class? EDIT: My abstract class has some concrete methods. I would be interested to see what people are using. Thanks Paul

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• I dont understand how Westpac Payway API and NET works

  - by spirytus

  Been googling all day, reading numerous pdf's and still getting confused with the concepts of sending data to Payway system from Westpac (bank in Australia, link text). They offer access via API but also give access via what they call NET. The way I understand is that when client want to pay on my website, in case of NET, client gets to the page (hosted by a bank or hosted by me) where is provided with form to enter credit card info details. Then this form is submitted via normal POST call to Payway's specific https address. It is processed then and browser returns to url I specified as one of the parameters I sent in hidden field. In case of API story is similar, so user receives form, fills in the data and then data is send to my backend (not Payway's). My backend then calls payway API with data provided and once answer received returns confirmation page to the client. Is my understanding right? Please explain as I have a feeling I am missing something basic here.

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• Display value of a django form field in a template?

  - by Eran Kampf

  I have a form with an email property. When using {{ form.email }} in case of some validation error, django still renders the previous value in the input tag's value attribute: <input type="text" id="id_email" maxlength="75" class="required" value="[email protected]" name="email"> I want to render the input tag myself (to add some javascript code and an error class in case of an error). For example this is my template instead of {{ form.email }}: <input type="text" autocomplete="on" id="id_email" name="email" class="email {% if form.email.errors %}error{% endif %}"> However this does not display the errorneous value ("[email protected]" in this example) to the user. How do I get the field's value in the template?

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• Hibernate can't load Custom SQL collection

  - by Geln Yang

  Hi, There is a table Item like, code,name 01,parent1 02,parent2 0101,child11 0102,child12 0201,child21 0202,child22 Create a java object and hbm xml to map the table.The Item.parent is a Item whose code is equal to the first two characters of its code : class Item{ String code; String name; Item parent; List<Item> children; .... setter/getter.... } <hibernate-mapping> <class name="Item" table="Item"> <id name="code" length="4" type="string"> <generator class="assigned" /> </id> <property name="name" column="name" length="50" not-null="true" /> <many-to-one name="parent" class="Item" not-found="ignore"> <formula> <![CDATA[ (select i.code,r.name from Item i where (case length(code) when 4 then i.code=SUBSTRING(code,1,2) else false end)) ]]> </formula> </many-to-one> <bag name="children"></bag> </class> </hibernate-mapping> I try to use formula to define the many-to-one relationship,but it doesn't work!Is there something wrong?Or is there other method? Thanks! ps,I use mysql database. add 2010/05/23 Pascal's answer is right,but the "false" value must be replaced with other expression,like "1=2".Because the "false" value would be considered to be a column of the table. select i.code from Item i where ( case length(code) when 4 then i.code=SUBSTRING(code,1,2) else 1=2 end) And I have another question about the children "bag" mapping.There isn't formula configuration option for "bag",but we can use "loader" to load a sql-query.I configure the "bag" as following.But it get a list whose size is 0.What's wrong with it? <class> ... ... <bag name="children"> <key /> <one-to-many class="Item"></one-to-many> <loader query-ref="getChildren"></loader> </bag> </class> <sql-query name="getChildren"> <load-collection alias="r" role="Item.children" /> <![CDATA[(select {r.*} from Item r join Item o where o.code=:code and ( case length(o.code) when 2 then (length(r.code)=4 and SUBSTRING(r.code,1,2)=o.code) else 1=2 end ))]]> </sql-query>

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