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  • C++ and Dependency Injection in unit testing

    - by lhumongous
    Suppose I have a C++ class like so: class A { public: A() { } void SetNewB( const B& _b ) { m_B = _b; } private: B m_B; } In order to unit test something like this, I would have to break A's dependency on B. Since class A holds onto an actual object and not a pointer, I would have to refactor this code to take a pointer. Additionally, I would need to create a parent interface class for B so I can pass in my own fake of B when I test SetNewB. In this case, doesn't unit testing with dependency injection further complicate the existing code? If I make B a pointer, I'm now introducing heap allocation, and some piece of code is now responsible for cleaning it up (unless I use ref counted pointers). Additionally, if B is a rather trivial class with only a couple of member variables and functions, why introduce a whole new interface for it instead of just testing with an instance of B? I suppose you could make the argument that it would be easier to refactor A by using an interface. But are there some cases where two classes might need to be tightly coupled?

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  • allocator with no template

    - by Merni
    Every stl container take an allocator as a second object, template < class T, class Allocator = allocator<T> > class vector; If you write your own class It is possible to use your own allocator. But is it possible to write your own allocator without using templates? For example, writing this function is not easy if you are not allowed to use templates pointer allocate(size_type n, const_pointer = 0) { void* p = std::malloc(n * sizeof(T)); if (!p) throw std::bad_alloc(); return static_cast<pointer>(p); } Because how could you know the size of T?

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  • How to get Ponter/Reference semantics in Scala.

    - by Lukasz Lew
    In C++ I would just take a pointer (or reference) to arr[idx]. In Scala I find myself creating this class to emulate a pointer semantic. class SetTo (val arr : Array[Double], val idx : Int) { def apply (d : Double) { arr(idx) = d } } Isn't there a simpler way? Doesn't Array class have a method to return some kind of reference to a particular field?

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  • Find the right value in recursive array

    - by fire
    I have an array with multiple sub-arrays like this: Array ( [0] => Array ( [Page_ID] => 1 [Page_Parent_ID] => 0 [Page_Title] => Overview [Page_URL] => overview [Page_Type] => content [Page_Order] => 1 ) [1] => Array ( [0] => Array ( [Page_ID] => 2 [Page_Parent_ID] => 1 [Page_Title] => Team [Page_URL] => overview/team [Page_Type] => content [Page_Order] => 1 ) ) [2] => Array ( [Page_ID] => 3 [Page_Parent_ID] => 0 [Page_Title] => Funds [Page_URL] => funds [Page_Type] => content [Page_Order] => 2 ) [3] => Array ( [0] => Array ( [Page_ID] => 4 [Page_Parent_ID] => 3 [Page_Title] => Strategy [Page_URL] => funds/strategy [Page_Type] => content [Page_Order] => 1 ) [1] => Array ( [0] => Array ( [Page_ID] => 7 [Page_Parent_ID] => 4 [Page_Title] => A Class Fund [Page_URL] => funds/strategy/a-class-fund [Page_Type] => content [Page_Order] => 1 ) [1] => Array ( [0] => Array ( [Page_ID] => 10 [Page_Parent_ID] => 7 [Page_Title] => Information [Page_URL] => funds/strategy/a-class-fund/information [Page_Type] => content [Page_Order] => 1 ) [1] => Array ( [Page_ID] => 11 [Page_Parent_ID] => 7 [Page_Title] => Fund Data [Page_URL] => funds/strategy/a-class-fund/fund-data [Page_Type] => content [Page_Order] => 2 ) ) [2] => Array ( [Page_ID] => 8 [Page_Parent_ID] => 4 [Page_Title] => B Class Fund [Page_URL] => funds/strategy/b-class-fund [Page_Type] => content [Page_Order] => 2 ) I need a function to find the right Page_URL so if you know the $url is "funds/strategy/a-class-fund" I need to pass that to a function that returns a single array result (which would be the Page_ID = 7 array in this example). Having a bit of a stupid day, any help would be appreciated!

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  • Is it good practise to blank out inherited functionality that will not be used?

    - by Timo Kosig
    I'm wondering if I should change the software architecture of one of my projects. I'm developing software for a project where two sides (in fact a host and a device) use shared code. That helps because shared data, e.g. enums can be stored in one central place. I'm working with what we call a "channel" to transfer data between device and host. Each channel has to be implemented on device and host side. We have different kinds of channels, ordinary ones and special channels which transfer measurement data. My current solution has the shared code in an abstract base class. From there on code is split between the two sides. As it has turned out there are a few cases when we would have shared code but we can't share it, we have to implement it on each side. The principle of DRY (don't repeat yourself) says that you shouldn't have code twice. My thought was now to concatenate the functionality of e.g. the abstract measurement channel on the device side and the host side in an abstract class with shared code. That means though that once we create an actual class for either the device or the host side for that channel we have to hide the functionality that is used by the other side. Is this an acceptable thing to do: public abstract class MeasurementChannelAbstract { protected void MethodUsedByDeviceSide() { } protected void MethodUsedByHostSide() { } } public class DeviceMeasurementChannel : MeasurementChannelAbstract { public new void MethodUsedByDeviceSide() { base.MethodUsedByDeviceSide(); } } Now, DeviceMeasurementChannel is only using the functionality for the device side from MeasurementChannelAbstract. By declaring all methods/members of MeasurementChannelAbstract protected you have to use the new keyword to enable that functionality to be accessed from the outside. Is that acceptable or are there any pitfalls, caveats, etc. that could arise later when using the code?

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  • jQuery 1.5.1 vs 1.4.4 weirdness

    - by zobgib
    I have been getting some weird errors when I upgrade jQuery from 1.4.4 to 1.5.1. Maybe you guys can explain what I need to change or why the new version is not working. In 1.4.4 I have the following code <div class="navlink home" data-link="home"> <span class="top">Home</span> </div> <div id="index-03"> </div> <div class="navlink resume" data-link="resume"> <span class="top">Resume</span> </div> <div id="index-05"> </div> <div id="index-06"> </div> <div class="navlink portfolio" data-link="portfolio"> <span class="bottom">Portfolio</span> </div> JS: $(".navlink").hover( function () { $(this).delay(100).animate({backgroundPosition: "-100% 0"}, 400); $(this).find("span").css("textDecoration","underline"); }, function () { $(this).queue("fx", []); $(this).animate({backgroundPosition: "0% 0%"}, 400); $(this).find("span").css("textDecoration","none"); } ); Which works just fine. but when I switch jQuery versions by changing this line in my header from <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script> to <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script> The above code quits animating and the background image just disappears. Here is a jsFiddle that shows what's happening just change the jQuery version on the side between 1.4.4 and 1.5.1 http://jsfiddle.net/fUXZ4/ -- 1.4.4 http://jsfiddle.net/3APCd/ -- 1.5.1 Here is a video of exactly what is happening to me: http://img.zobgib.com/2011-03-07_1905.swf

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  • Creating a library of classes in php - how to handle the library root location?

    - by jax
    I am about to create a collection of classes in php which are interrelated. Now I would like to include files using their absolute path, ie If I were in '/com/mysite/licences/Generator.class.php' I would like to include files like this: include '/com/mysite/lib/Utils.class.php' I don't want to include like this, I think it is confusing and ugly include '../licenses/Utils.class.php' This works ok, unless 'com' is not in the root of public_html. I assume I will need some sort of prefix to append to each file LIBRARY_ROOT that hold the location of 'com' in the current filesystem. So it might look like this include LIBRARY_ROOT.'com/mysite/lib/Utils.class.php' What is the best way to do this?

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  • Icon placement relative to list items

    - by Ronedog
    When I show a hidden div that is stored inside an <li> tag the icons are pushing down to the bottom of the <li>. How can I prevent this? Here's the HTML: <ul> <li>Utah <ul> <li>Park City <ul> <li>Park Cat 1 <div><img class="portf_edit" /></div> <div><img class="portf_archive" /></div> <div><img class="portf_delete" /></div> </li> <li>Skiing <div><img class="portf_edit" /></div> <div><img class="portf_archive" /></div> <div><img class="portf_delete" /></div> </li> </ul> </li> </ul> </li> </ul> Here's the li css: li { list-style-type:none; vertical-align: top; list-style-image: none; left:0px; text-align:left; clear: both; } .portf_edit{ float:right; position: relative; right:50px; display:block; } .portf_archive{ float:right; position: relative; right:-5px; display:block; } .portf_delete{ float:right; position: relative; right: -60px; display:block; } Here's a screen shot prior to expanding which shows the icons how I want them to line up: Here's the screen shot prior to expanding which shows where the icons are being pushed to:

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  • Tab Index on div

    - by Mithun P
    Please see the form HTML code below <form method="post" action="register"> <div class="email"> Email <input type="text" tabindex="1" id="email" value="" name="email"> </div> </div> <div class="agreement"> <div tabindex="2" class="terms_radio"> <div onclick="changeTerm(this);" class="radio" id="terms_radio_wrapper" style="background-position: left 0pt;"> <input type="radio" id="terms" value="1" name="terms"><label for="terms">I have read and understood the ZapAV</label> </div> </div> </div> <div class="form_submit"> <input type="button" tabindex="3" value="Cancel" name="cancel"> <input type="submit" tabindex="4" value="Submit" name="submit"> </div> </form> Here I syled teh agreement check box insuch a way that radio input is completly hidden and background image is applied to the wrapper div, and onclick of the wrapper div will toggle the backgroud image as well as the checked status of teh radio input. I need to set the tabindex index on the 'terms_radio' DIV, simply tabindex="2" attribute on div is not working, Is it possible to bring the dotted border on the label for the radio input up on pressing the TAB when the cursor is at email input field?

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  • Java access the caller variable, is it possible? how?

    - by lacas
    i have a class main { Class1 class1=new Class1(); class1.function1(); } class Class1 { int abc=1; ArrayList<Class2> class2s=new ArrayList<Class2>(); int function1() { class2s.add(new Class2(asd)); abc=555; } } class Class2 { int functionx() { Log.e("abc?", ""+PARENT???.abc); } } How can I get the caller Class's variable, say abc?

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  • Multiple instance_of?

    - by c00lryguy
    How would I make Object#instance_of? accept multiple arguments so that something like the below example would work? class Foo; end class Bar; end class Baz; end my_foo = Foo.new my_bar = Bar.new my_baz = Baz.new my_foo.instance_of?(Foo, Bar) # => true my_bar.instance_of?(Foo, Bar) # => true my_baz.instance_of?(Foo, Bar) # => false

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  • Multiple datepicker problem with same ID

    - by namezero
    hi, here is my problem: <input type="text" class="datepick1" id="date" /> <input type="text" class="datepick2" id="date" /> <input type="text" class="datepick3" id="date" /> then i apply datepicker on dom (by classname) $('.datepick1').datepicker(); $('.datepick2').datepicker(); $('.datepick3').datepicker(); = the three dom have datepicker but, onselect date, it change automatically the first one (datepick1) HELP

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  • Java Generics error when implementing Hibernate message interpolator

    - by Jayaprakash
    Framework: Spring, Hibernate. O/S: Windows I am trying to implement hibernate's Custom message interpolator following the direction of this Link. When implementing the below class, it gives an error "Cannot make a static reference to the non-static type Locale". public class ClientLocaleThreadLocal<Locale> { private static ThreadLocal tLocal = new ThreadLocal(); public static void set(Locale locale) { tLocal.set(locale); } public static Locale get() { return tLocal.get(); } public static void remove() { tLocal.remove(); } } As I do not know generics enough, not sure how is being used by TimeFilter class below and the purpose of definition in the above class. public class TimerFilter implements Filter { public void destroy() { } public void doFilter(ServletRequest req, ServletResponse res, FilterChain filterChain) throws IOException, ServletException { try { ClientLocaleThreadLocal.set(req.getLocale()); filterChain.doFilter(req, res); }finally { ClientLocaleThreadLocal.remove(); } } public void init(FilterConfig arg0) throws ServletException { } } Will doing the following be okay? Change static method/field in ClientLocaleThreadLocal to non-static method/fields In TimeFilter, set locale by instantiating new object as below. new ClientLocaleThreadLocal().set(req.getLocale()) Thanks for your help in advance

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  • Zend Framework Handle One to Many

    - by user192344
    I have 2 tables "user", "contact", the relation between two tables is one user has many contact Table member m_id name ------------ Table Contact c_id c_m_id value in zend model class, i do it in this way /* Member.php */ class Default_Model_DbTable_Member extends Zend_Db_Table_Abstract { protected $_name = 'member'; protected $_dependentTables = array('Default_Model_DbTable_Contact'); } /* Contact.php */ class Default_Model_DbTable_Contact extends Zend_Db_Table_Abstract { protected $_name = 'contact'; protected $_referenceMap = array( 'Member' => array( 'columns'=> array('c_id'), 'refTableClass'=> 'Default_Model_DbTable_Member', 'refColumns'=> array('c_m_id') ) ); /* IndexController.php */ class IndexController extends Zend_Controller_Action { public function indexAction() { $m= new Default_Model_DbTable_Member(); $row = $m->find(1); $data = $row->current(); $data = $data->findDependentRowset('Default_Model_DbTable_Contact'); print_r($data->toArray()); } } But i just get Invalid parameter number: no parameters were bound , my goal is to search a member detail record, and it also contains a array which store all contact info (i can use join method to do that, but i just want to try zend feature)

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  • MVC + Repository Pattern - Still depends on Data Model?

    - by Jack
    I've started a project for school in which I am using ASP.NET MVC 2 + LINQ2SQL, and a business layer so my UI doesnt interact with the DB directly. My question is this: In my MVC project, when bringing up views and passing around data, I still have to include my Data project for access to the classes in my Linq2Sql project. Is this correct? Example: Controller: ClassesRepository cr = new ClassesRepository(); // this is from my Business project Class classToEdit = cr.GetByClassId(id); // "Class" is from my data project I still have to reference the Class class in my linq2sql data project - shouldn't my UI be completely independent of my data layer? Or maybe I'm going about this all wrong.

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  • css displaying divs inside a Tr fine in FireFox, but IE increases the width of the row...

    - by Ronedog
    I'm having some difficulty figuring out what is going on and how to fix it. I have some divs that contain some icons that are causing a width problem when displaying tabular data. If I remove the div's that contain the icons, the row width ends up the way I want it (See the firefox example below). Here's the view in Firefox which is what I want (notice the positioning of the icons circled in red, which is aligned on the same y coordinate, or thereabouts): Here's the view in IE7 (Notice what happens to the icons and the width of the grey line, which is the table row): Here's the HTML: <table> <tbody> <tr> <td> <span>stuff 1</span> <span>stuff 2</span> <div class="prop_edit"><img class="img_height14" src="edit.jpg"></div> <div class="prop_archive"><img class="img_height14" src="archive.jpg"></div> <div class="prop_delete"><img class="img_height14" src="delete.jpg"></div> <div style="display:none;"> <div>Links Here</div> </div> </td> </tr> </tbody> Heres the CSS: .prop_edit{ float:right; position: relative; top: 0px; right:50px; } .prop_archive{ float:right; position: relative; top: 0px; right:10px; } .prop_delete{ float:right; position: relative; top: 0px; right: -30px; } .img_height14{ height:14px; vertical-align:top; position:relative; } I've tried a bunch of different css things, but really am just hacking away hoping to figure something out. Anyone got some tips that could help me? Thanks in advance.

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  • Testing local scoped object with mockito without refactoring

    - by supertonsky
    Say I have the following code: public class ClassToTest { AnotherClass anotherClass; public void methodToTest( int x, int y ) { int z = x + y anotherClass.receiveSomething( z ); } } public class AnotherClass { public void receiveSomething( int z ) {.. do something.. } } I want to make assertion on the value of the variable z. How do I do this? Variables x, y, and z could be some other Java class types, and I just used "int" for simplicity.

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  • How can I get model names from inside my app?

    - by Cameron
    I have a bunch of models in a sub-directory that inherit from a model in the models root directory. I want to be able to set a class variable in another model that lists each inherited model class. i.e @@groups = sub_models.map do { |model| model.class.to_s } Not sure how to get at this info though...

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  • Easiest way to submit data via PHP?

    - by Abijah
    I'm new to PHP, and have spent 10 hours trying to figure this problem out. The goal is to take all data entered into this order form, and send it to my email via PHP. I have 2 questions: 1. I can get PHP to send data from a single menu item (example: Mexican Tortas), but how do I get PHP to send data from multiple items (example: Mexican Tortas, Fish Sandwich and Hamburger)? 2. How do I tell PHP to not send data from menu items that don't have the "How Many?" or "Customize It?" text fields filled out? If you could provide a super simple example (or a link to a learning resource) I would really appreciate it. Thank you, Abijah PHP <?php if(isset($_POST['submit'])) { $to = "[email protected]"; $subject = "New Order"; $name_field = $_POST['name']; $phone_field = $_POST['phone']; $item = $_POST['item']; $quantity = $_POST['quantity']; $customize = $_POST['customize']; } $body = "Name: $name_field\nPhone: $phone_field\n\nItem: $item\nQuantity: $quantity\nCustomize: $customize"; echo "Data has been submitted to $to!"; mail($to, $subject, $body); ?> HTML <form action="neworder.php" method="POST"> <div class ="item"> <img style="float:left; margin-right:15px; border:1px Solid #000; width:200px; height:155px;" src="images/mexicantortas.jpg"> <h1>Mexican Torta - $8.50</h1> <input name="item" type="hidden" value="Mexican Torta"/> <h2>How Many? <font color="#999999">Ex: 1, 2, 3...?</font></h2> <input name="quantity" type="text"/> <h3>Customize It? <font color="#999999">Ex: No Lettuce, Extra Cheese...</font></h3> <textarea name="customize"/></textarea> </div><!-- ITEM_LEFT --> <div class ="item"> <img style="float:left; margin-right:15px; border:1px Solid #000; width:200px; height:155px;" src="images/fishsandwich.jpg"> <h1>Fish Sandwich - $8.50</h1> <input name="item" type="hidden" value="Fish Sandwich"/> <h2>How Many? <font color="#999999">Ex: 1, 2, 3...?</font></h2> <input name="quantity" type="text"/> <h3>Customize It? <font color="#999999">Ex: No Lettuce, Extra Cheese...</font></h3> <textarea name="customize"/></textarea> </div><!-- ITEM_LEFT --> <div class ="item"> <img style="float:left; margin-right:15px; border:1px Solid #000; width:200px; height:155px;" src="images/hamburgers.jpg"> <h1>Hamburger w/ Fries - $7.00</h1> <input name="item" type="hidden" value="Fish Sandwich"/> <h2>How Many? <font color="#999999">Ex: 1, 2, 3...?</font></h2> <input name="quantity" type="text"/> <h3>Customize It? <font color="#999999">Ex: No Lettuce, Extra Cheese...</font></h3> <textarea name="customize"/></textarea> </div><!-- ITEM_LEFT --> <div class="horizontal_form"> <div class="form"> <h2>Place Your Order Now: <font size="3"><font color="#037B41">Fill in the form below, and we'll call you when your food is ready to be picked up...</font></font></h2> <p class="name"> <input type="text" name="name" id="name" style="text-align:center;" onClick="this.value='';" value="Enter your name"/> </p> <p class="phone"> <input type="text" name="phone" id="phone" style="text-align:center;" onClick="this.value='';" value="Enter your phone #"/> </p> <p class="submit"> <input type="submit" value="Place Order" name="submit"/> </p> </div><!-- FORM --> </div><!-- HORIZONTAL_FORM --> </form>

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  • How can I map a String to a function in Java?

    - by Bears will eat you
    Currently, I have a bunch of Java classes that implement a Processor interface, meaning they all have a processRequest(String key) method. The idea is that each class has a few (say, <10) member Strings, and each of those maps to a method in that class via the processRequest method, like so: class FooProcessor implements Processor { String key1 = "abc"; String key2 = "def"; String key3 = "ghi"; // and so on... String processRequest(String key) { String toReturn = null; if (key1.equals(key)) toReturn = method1(); else if (key2.equals(key)) toReturn = method2(); else if (key3.equals(key)) toReturn = method3(); // and so on... return toReturn; } String method1() { // do stuff } String method2() { // do other stuff } String method3() { // do other other stuff } // and so on... } You get the idea. This was working fine for me, but now I need a runtime-accessible mapping from key to function; not every function actually returns a String (some return void) and I need to dynamically access the return type (using reflection) of each function in each class that there's a key for. I already have a manager that knows about all the keys, but not the mapping from key to function. My first instinct was to replace this mapping using if-else statements with a Map<String, Function>, like I could do in Javascript. But, Java doesn't support first-class functions so I'm out of luck there. I could probably dig up a third-party library that lets me work with first-class functions, but I haven't seen any yet, and I doubt that I need an entire new library. I also thought of putting these String keys into an array and using reflection to invoke the methods by name, but I see two downsides to this method: My keys would have to be named the same as the method - or be named in a particular, consistent way so that it's easy to map them to the method name. This seems WAY slower than the if-else statements I have right now. Efficiency is something of a concern because these methods will tend to get called pretty frequently, and I want to minimize unnecessary overhead. TL; DR: I'm looking for a clean, minimal-overhead way to map a String to some sort of a Function object that I can invoke and call (something like) getReturnType() on. I don't especially mind using a 3rd-party library if it really fits my needs. I also don't mind using reflection, though I would strongly prefer to avoid using reflection every single time I do a method lookup - maybe using some caching strategy that combines the Map with reflection. Thoughts on a good way to get what I want? Cheers!

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  • Alternate colors on click with jQuery

    - by Jace Cotton
    I'm sure there is a simple solution to this, and I'm sure this is a duplicate question, though I have been unable to solve my solution particularly because I don't really know how to phrase it in order to search for other questions/solutions, so I'm coming here hoping for some help. Basically, I have spans with classes that assigns a background-color property, and inside those spans are words. I have three of these spans, and each time a user clicks on a span I want the class to change (thus changing the background color and inner text). HTML: <span class="alternate"> <span class="blue showing">Lorem</span> <span class="green">Ipsum</span> <span class="red">Dolor</span> </span> CSS: .alternate span { display : none } .alternate .showing { display : inline } .blue { background : blue } .green { background : green } .red { background : red } jQuery: $(".alternate span").each(function() { $(this).on("click", function() { $(this).removeClass("showing"); $(this).next().addClass("showing"); }); }); This solution works great using $.next until I get to the third click, whereafter .showing is removed, and is not added since there are no more $.next options. How do I, after getting to the last-child, add .showing to the first-child and then start over? I have tried various options including if($(".alternate span:last-child").hasClass("showing")) { etc. etc. }, and I attempted to use an array and for loop though I failed to make it work. Newb question, I know, but I can't seem to solve this so as a last resort I'm coming here.

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  • LINQ - joining multiple lists

    - by kristian
    I've looked at the 101 Linq Samples here but I can't see anything like this in that list. If I'm just not seeing a relevant example there, please link to it. If I have these 3 classes: class Student { int id; string name } class Course { int id, string name } class Enrolment { int studentId; int courseId; } How would I use LINQ to get a list of courses a student is enrolled on? (assume I have an IList of all three classes)

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