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  • design function: underlying structure to store list of results for print to file

    - by forest.peterson
    is this a good approach to print a list of items to csv file with a sublist attached to each item. The gist of the function is when an item is found that does not exactly macth then a list of close matches is generated - this works now writing out one list at a time to a command window. For export to a csv file I think all the lists must be generated, stored and then written at once. Right now I use a struct to store the attributes printed, each struct is an item on the list - these structs are then added to a sorted stack and when printed they pop off into write out. Is a stack of stacks of structs a good design?

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  • Is directly executing SQL bad app design?

    - by Michael Lowman
    I'm developing an iOS application that's a manager/viewer for another project. The idea is the app will be able to process the data stored in a database into a number of visualizations-- the overall effect being similar to cacti. I'm making the visualizations fully user-configurable: the user defines what she wants to see and adds restrictions. She might specify, for instance, to graph a metric over the last three weeks with user accounts that are currently active and aren't based in the United States. My problem is that the only design I can think of is more or less passing direct SQL from the iOS app to the backend server to be executed against the database. I know it's bad practice and everything should be written in terms of stored procedures. But how else do I maintain enough flexiblity to keep fully user-defined queries? While the application does compose the SQL, direct SQL is never visible or injectable by the user. That's all abstracted away in UIDateTimeChoosers, UIPickerViews, and the like.

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  • When does logic belong in the Business Object/Entity, and when does it belong in a Service?

    - by Casey
    In trying to understand Domain Driven Design I keep returning to a question that I can't seem to definitively answer. How do you determine what logic belongs to a Domain entity, and what logic belongs to a Domain Service? Example: We have an Order class for an online store. This class is an entity and an aggregate root (it contains OrderItems). Public Class Order:IOrder { Private List<IOrderItem> OrderItems Public Order(List<IOrderItem>) { OrderItems = List<IOrderItem> } Public Decimal CalculateTotalItemWeight() //This logic seems to belong in the entity. { Decimal TotalWeight = 0 foreach(IOrderItem OrderItem in OrderItems) { TotalWeight += OrderItem.Weight } return TotalWeight } } I think most people would agree that CalculateTotalItemWeight belongs on the entity. However, at some point we have to ship this order to the customer. To accomplish this we need to do two things: 1) Determine the postage rate necessary to ship this order. 2) Print a shipping label after determining the postage rate. Both of these actions will require dependencies that are outside the Order entity, such as an external webservice to retrieve postage rates. How should we accomplish these two things? I see a few options: 1) Code the logic directly in the domain entity, like CalculateTotalItemWeight. We then call: Order.GetPostageRate Order.PrintLabel 2) Put the logic in a service that accepts IOrder. We then call: PostageService.GetPostageRate(Order) PrintService.PrintLabel(Order) 3) Create a class for each action that operates on an Order, and pass an instance of that class to the Order through Constructor Injection (this is a variation of option 1 but allows reuse of the RateRetriever and LabelPrinter classes): Public Class Order:IOrder { Private List<IOrderItem> OrderItems Private RateRetriever _Retriever Private LabelPrinter _Printer Public Order(List<IOrderItem>, RateRetriever Retriever, LabelPrinter Printer) { OrderItems = List<IOrderItem> _Retriever = Retriever _Printer = Printer } Public Decimal GetPostageRate { _Retriever.GetPostageRate(this) } Public void PrintLabel { _Printer.PrintLabel(this) } } Which one of these methods do you choose for this logic, if any? What is the reasoning behind your choice? Most importantly, is there a set of guidelines that led you to your choice?

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  • C#, Generic Lists and Inheritance

    - by Andy
    I have a class called Foo that defines a list of objects of type A: class Foo { List<A> Items = new List<A>(); } I have a class called Bar that can save and load lists of objects of type B: class Bar { void Save(List<B> ComplexItems); List<B> Load(); } B is a child of A. Foo, Bar, A and B are in a library and the user can create children of any of the classes. What I would like to do is something like the following: Foo MyFoo = new Foo(); Bar MyBar = new Bar(); MyFoo.Items = MyBar.Load(); MyBar.Save(MyFoo.Items); Obviously this won't work. Is there a clever way to do this that avoids creating intermediate lists? thanks, Andy

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  • What is the sense of "Feature Oriented Programming" (FOP) in C++, and would it make sense in Java an

    - by ivan_ivanovich_ivanoff
    Hello! Sadly, I can't remember where I read it, but... ...in C++ you can derive a class from a template parameter. Im pretty sure it was called Feature Oriented Programming (FOP) and meant to be somehow useful. It was something like: template <class T> class my_class : T { // some very useful stuff goes here ;) } My questions about this: What is the sense of such pattern? Since this it not possible in Java / C#, how this pattern is achieved in these languages? Can it be expected to be implemented in Java / C# one day? (Well, first Java would need to get rid of type erasure) EDIT: I'm really not talking about generics in Java / C# (where you can't derive a class from a generic type parameter)

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  • Downsides to immutable objects in Java?

    - by parkr
    The advantages of immutable objects in Java seem clear: consistent state automatic thread safety simplicity You can favour immutability by using private final fields and constructor injection. But, what are the downsides to favouring immutable objects in Java? i.e. incompatibility with ORM or web presentation tools? Inflexible design? Implementation complexities? Is it possible to design a large-scale system (deep object graph) that predominately uses immutable objects?

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  • Can't declare an abstract method private....

    - by Zombies
    I want to do this, yet I can't. Here is my scenario and rational. I have an abstract class for test cases that has an abstract method called test(). The test() method is to be defined by the subclass; it is to be implemented with logic for a certain application, such as CRMAppTestCase extends CompanyTestCase. I don't want the test() method to be invoked directly, I want the super class to call the test() method while the sub class can call a method which calls this (and does other work too, such as setting a current date-time right before the test is executed for example). Example code: public abstract class CompanyTestCase { //I wish this would compile, but it cannot be declared private private abstract void test(); public TestCaseResult performTest() { //do some work which must be done and should be invoked whenever //this method is called (it would be improper to expect the caller // to perform initialization) TestCaseResult result = new TestCaseResult(); result.setBeginTime(new Date()); long time = System.currentTimeMillis(); test(); //invoke test logic result.setDuration(System.currentTimeMillis() - time); return result; } } Then to extend this.... public class CRMAppTestCase extends CompanyTestCase { public void test() { //test logic here } } Then to call it.... TestCaseResult result = new CRMAppTestCase().performTest();

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  • Adding a Design time Panel to a TabPage at run time

    - by BDotA
    Hi, I wish to have a Panel with the controls on it at design time but I want to add this panel to a desired tabPage of my TabControl at run time. I wrote something like this, did not work : the panel does not show up in the tab page. please help me. panel2.Parent = tabGuy.TabPages[0]; tabGuy.SuspendLayout(); tabGuy.TabPages[0].Controls.Add(panel2); tabGuy.ResumeLayout(); panel2.Show();

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  • How can I make vim show the current class and method I'm editing

    - by dcrosta
    Does anyone know if it's possible (or know of an existing vim script or plugin) that can create a "status bar" that shows the name of the current class and method (or function) I'm editing? I'm imagining that it would plug into the syntax parser for the filetype of the current buffer, and display a breadcrumb trail to show you what you're currently editing. I don't know vimscript well enough to suggest any more than that, but if there aren't any good solutions already, I may begin to hack on one, so suggestions as to where to start are welcome, too!

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  • Three customer addresses in one table or in separate tables?

    - by DR
    In my application I have a Customer class and an Address class. The Customer class has three instances of the Address class: customerAddress, deliveryAddress, invoiceAddress. Whats the best way to reflect this structure in a database? The straightforward way would be a customer table and a separate address table. A more denormalized way would be just a customer table with columns for every address (Example for "street": customer_street, delivery_street, invoice_street) What are your experiences with that? Are there any advantages and disadvantages of these approaches?

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  • Conditional on WebClient

    - by CarryFlag
    Given: thin client (JS) model services client use services. services use model. Model consists of (for sample): Rect Circle ... Ellipse services: class CanvasProviger { public Canvas getCanvas() { return new Canvas(); } } model: class Canvas ... { private List < Figure > figures = new List < Figure >; ... } class Circle extends Figure { private int x, y, r; } class Rect extends Figure { private x, y, w, h; } client: ... var figure = MyJSRPCImpl.getCanvas().nextFigure(); if(figure == JSLocalModel.Rect) { drawRect(figure); } else if(figure == JSLocalModel.Circle) { drawCircle(figure); } ... How else can do way conditional? In rich client I used pattern Visitor. // my bad english, I know =(

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  • Encapsulating a Windows.Forms.Button

    - by devoured elysium
    I want to define a special kind of button that only allows two possible labels: "ON" and "OFF". I decided to inherit from a Windows.Forms.Button to implement this but now I don't know I how should enforce this rule. Should I just override the Text property like this? public override string Text { set { throw new InvalidOperationException("Invalid operation on StartStopButton!"); } } The problem I see with this is that I am breaking the contract that all buttons should have. If any code tries something like foreach (Button button in myForm) { button.Text = "123"; } they will get an Exception if I have any of my special buttons on the form, which is something that isn't expectable. First, because people think of properties just as "public" variables, not methods, second, because they are used to using and setting whatever they want to buttons without having to worry with Exceptions. Should I instead just make the set property do nothing? That could also lead to awkward results: myButton.Text = "abc"; MessageBox.Show(abc); //not "abc"! The general idea from the OO world is to in this kind of cases use Composition instead of inheritance. public class MySpecialButton : <Some class from System.Windows.Forms that already knows how to draw itself on forms> private Button button = new Button(); //I'd just draw this button on this class //and I'd then only show the fields I consider //relevant to the outside world. ... } But to make the Button "live" on a form it must inherit from some special class. I've looked on Control, but it seems to already have the Text property defined. I guess the ideal situation would be to inherit from some kind of class that wouldn't even have the Text property defined, but that'd have position, size, etc properties available. Upper in the hierarchy, after Control, we have Component, but that looks like a really raw class. Any clue about how to achieve this? I know this was a long post :( Thanks

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  • Singletons and constants

    - by devoured elysium
    I am making a program which makes use of a couple of constants. At first, each time I needed to use a constant, I'd define it as //C# private static readonly int MyConstant = xxx; //Java private static final int MyConstant = xxx; in the class where I'd need it. After some time, I started to realise that some constants would be needed in more than one class. At this time, I had 3 choises: To define them in the different classes that needed it. This leads to repetition. If by some reason later I need to change one of them, I'd have to check in all classes to replace them everywhere. To define a static class/singleton with all the constants as public. If I needed a constant X in ClassA, ClassB and ClassC, I could just define it in ClassA as public, and then have ClassB and ClassC refer to them. This solution doesn't seem that good to me as it introduces even more dependencies as the classes already have between them. I ended up implementing my code with the second option. Is that the best alternative? I feel I am probably missing some other better alternative. What worries me about using the singleton here is that it is nowhere clear to a user of the class that this class is using the singleton. Maybe I could create a ConstantsClass that held all the constants needed and then I'd pass it in the constructor to the classes that'd need it? Thanks

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  • mysql database design: threads and replies

    - by ajsie
    in my forum i have threads and replies. one thread has multiple replies. but then, a reply can be a reply of an reply (like google wave). because of that a reply has to have a column "reply_id" so it can point to the parent reply. but then, the "top-level" replies (the replies directly under the thread) will have no parent reply. so how can i fix this? how should the columns be in the reply table (and thread table). at the moment it looks like this: threads: id title body replies: id thread_id (all replies will belong to a thread) reply_id (here lies the problem. the top-level replies wont have a parent reply) body what could a smart design look like to enable reply a reply?

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  • MySql database design for a quiz

    - by Mark
    I'm making an online quiz with php and mysql and need a bit of help deciding how to design the database for optimal insert of questions/answers and to select questions for the quiz. The table will hold 80 questions each with 4 possible options plus the correct answer. When retrieving the questions and options from the database I will randomly select 25 questions and their options. Is it better to make a single column for all questions, options, and correct answers? For example: ID | Q | OPT1 | OPT2 | OPT3 | OPT4 | ANS Or would it be better to make a column for each individual question, option, and correct answer? For example: Q1 | Q1_OPT1 | Q1_OPT2 | Q1_OPT3 | Q1_OPT5 | Q1_ANS | Q2 | Q2_OPT1 | Q2_OPT2...

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  • C++ Inheritance Question

    - by shaz
    I have a base class MessageHandler and 2 derived classes, MessageHandler_CB and MessageHandler_DQ. The derived classes redefine the handleMessage(...) method. MH_DQ processes a message and puts the result in a deque while MH_CB processes the message and then executes a callback function. The base class has a static callback function that I pass along with a this pointer to a library which calls the static callback when a new message is available for processing. My problem comes when I am in the static callback with a void * pointing to either a MH_DQ or a MH_CB. If I cast it to the base class the empty MessageHandler::handleMessage(...) method is called, rather than the version in the appropriate derived class. What is the best way to address this situation from a design perspective and/or what language features might help me to implement a solution to my problem? Thanks in advance!

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  • Singleton design potential leak

    - by iBrad Apps
    I have downloaded a library off of github and have noticed that in the main singleton of the library there is a possible leak in this bit of code: +(DDGameKitHelper*) sharedGameKitHelper { @synchronized(self) { if (instanceOfGameKitHelper == nil) { [[DDGameKitHelper alloc] init]; } return instanceOfGameKitHelper; } return nil; } Now obviously there is no release or autorelease anywhere so I must do it but how and in what way properly? I have looked at various Singleton design patterns on the Internet and they just assign, in this case, instanceOfGameKitHelper to the alloc and init line. Anyway how would I properly fix this? Thanks!

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  • C# design question (Connections)

    - by David
    Hello, I would like to hear your suggestions on kind of design problem which I have in c#. So, I am making a program where people can meet and draw in the same window over the internet or LAN. I am drawing into a bitmap and than I set it to a pictureBox component. I have a hard time to decide how to send updates to each user, what is the best way to do it. Should I send coordinates of mouse and than do the drawing on each users screen or stream the image to each. Maybe you know better solution to keep it synchronized and efficient. Thank you.

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  • Cannot see the variable In my own JQuery plugin's function.

    - by qinHaiXiang
    I am writing one of my own JQuery plugin. And I got some strange which make me confused. I am using JQuery UI datepicker with my plugin. ;(function($){ var newMW = 1, mwZIndex = 0; // IgtoMW contructor Igtomw = function(elem , options){ var activePanel, lastPanel, daysWithRecords, sliding; // used to check the animation below is executed to the end. // used to access the plugin's default configuration this.opts = $.extend({}, $.fn.igtomw.defaults, options); // intial the model window this.intialMW(); }; $.extend(Igtomw.prototype, { // intial model window intialMW : function(){ this.sliding = false; //this.daysWithRecords = []; this.igtoMW = $('<div />',{'id':'igto'+newMW,'class':'igtoMW',}) .css({'z-index':mwZIndex}) // make it in front of all exist model window; .appendTo('body') .draggable({ containment: 'parent' , handle: '.dragHandle' , distance: 5 }); //var igtoWrapper = igtoMW.append($('<div />',{'class':'igtoWrapper'})); this.igtoWrapper = $('<div />',{'class':'igtoWrapper'}).appendTo(this.igtoMW); this.igtoOpacityBody = $('<div />',{'class':'igtoOpacityBody'}).appendTo(this.igtoMW); //var igtoHeaderInfo = igtoWrapper.append($('<div />',{'class':'igtoHeaderInfo dragHandle'})); this.igtoHeaderInfo = $('<div />',{'class':'igtoHeaderInfo dragHandle'}) .appendTo(this.igtoWrapper); this.igtoQuickNavigation = $('<div />',{'class':'igtoQuickNavigation'}) .css({'color':'#fff'}) .appendTo(this.igtoWrapper); this.igtoContentSlider = $('<div />',{'class':'igtoContentSlider'}) .appendTo(this.igtoWrapper); this.igtoQuickMenu = $('<div />',{'class':'igtoQuickMenu'}) .appendTo(this.igtoWrapper); this.igtoFooter = $('<div />',{'class':'igtoFooter dragHandle'}) .appendTo(this.igtoWrapper); // append to igtoHeaderInfo this.headTitle = this.igtoHeaderInfo.append($('<div />',{'class':'headTitle'})); // append to igtoQuickNavigation this.igQuickNav = $('<div />', {'class':'igQuickNav'}) .html('??') .appendTo(this.igtoQuickNavigation); // append to igtoContentSlider this.igInnerPanelTopMenu = $('<div />',{'class':'igInnerPanelTopMenu'}) .appendTo(this.igtoContentSlider); this.igInnerPanelTopMenu.append('<div class="igInnerPanelButtonPreWrapper"><a href="" class="igInnerPanelButton Pre" action="" style="background-image:url(images/igto/igInnerPanelTopMenu.bt.bg.png);"></a></div>'); this.igInnerPanelTopMenu.append('<div class="igInnerPanelSearch"><input type="text" name="igInnerSearch" /><a href="" class="igInnerSearch">??</a></div>' ); this.igInnerPanelTopMenu.append('<div class="igInnerPanelButtonNextWrapper"><a href="" class="igInnerPanelButton Next" action="sm" style="background-image:url(images/igto/igInnerPanelTopMenu.bt.bg.png); background-position:-272px"></a></div>' ); this.igInnerPanelBottomMenu = $('<div />',{'class':'igInnerPanelBottomMenu'}) .appendTo(this.igtoContentSlider); this.icWrapper = $('<div />',{'class':'icWrapper','id':'igto'+newMW+'Panel'}) .appendTo(this.igtoContentSlider); this.icWrapperCotentPre = $('<div class="slider pre"></div>').appendTo(this.icWrapper); this.icWrapperCotentShow = $('<div class="slider firstShow "></div>').appendTo(this.icWrapper); this.icWrapperCotentnext = $('<div class="slider next"></div>').appendTo(this.icWrapper); this.initialPanel(); this.initialQuickMenus(); console.log(this.leftPad(9)); newMW++; mwZIndex++; this.igtoMW.bind('mousedown',function(){ var $this = $(this); //alert($this.css('z-index') + ' '+mwZIndex); if( parseInt($this.css('z-index')) === (mwZIndex-1) ) return; $this.css({'z-index':mwZIndex}); mwZIndex++; //alert(mwZIndex); }); }, initialPanel : function(){ this.defaultPanelNum = this.opts.initialPanel; this.activePanel = this.defaultPanelNum; this.lastPanel = this.defaultPanelNum; this.defaultPanel = this.loadPanelContents(this.defaultPanelNum); $(this.defaultPanel).appendTo(this.icWrapperCotentShow); }, initialQuickMenus : function(){ // store the current element var obj = this; var defaultQM = this.opts.initialQuickMenu; var strMenu = ''; var marginFirstEle = '8'; $.each(defaultQM,function(key,value){ //alert(key+':'+value); if(marginFirstEle === '8'){ strMenu += '<a href="" class="btPanel" panel="'+key+'" style="margin-left: 8px;" >'+value+'</a>'; marginFirstEle = '4'; } else{ strMenu += '<a href="" class="btPanel" panel="'+key+'" style="margin-left: 4px;" >'+value+'</a>'; } }); // append to igtoQuickMenu this.igtoQMenu = $(strMenu).appendTo(this.igtoQuickMenu); this.igtoQMenu.bind('click',function(event){ event.preventDefault(); var element = $(this); if(element.is('.active')){ return; } else{ $(obj.igtoQMenu).removeClass('active'); element.addClass('active'); } var d = new Date(); var year = d.getFullYear(); var month = obj.leftPad( d.getMonth() ); var inst = null; if( obj.sliding === false){ console.log(obj.lastPanel); var currentPanelNum = parseInt(element.attr('panel')); obj.checkAvailability(); obj.getDays(year,month,inst,currentPanelNum); obj.slidePanel(currentPanelNum); obj.activePanel = currentPanelNum; console.log(obj.activePanel); obj.lastPanel = obj.activePanel; obj.icWrapper.find('input').val(obj.activePanel); } }); }, initialLoginPanel : function(){ var obj = this; this.igPanelLogin = $('<div />',{'class':"igPanelLogin"}); this.igEnterName = $('<div />',{'class':"igEnterName"}).appendTo(this.igPanelLogin); this.igInput = $('<input type="text" name="name" value="???" />').appendTo(this.igEnterName); this.igtoLoginBtWrap = $('<div />',{'class':"igButtons"}).appendTo(this.igPanelLogin); this.igtoLoginBt = $('<a href="" class="igtoLoginBt" action="OK" >??</a>\ <a href="" class="igtoLoginBt" action="CANCEL" >??</a>\ <a href="" class="igtoLoginBt" action="ADD" >????</a>').appendTo(this.igtoLoginBtWrap); this.igtoLoginBt.bind('click',function(event){ event.preventDefault(); var elem = $(this); var action = elem.attr('action'); var userName = obj.igInput.val(); obj.loadRootMenu(); }); return this.igPanelLogin; }, initialWatchHistory : function(){ var obj = this; // for thirt part plugin used if(this.sliding === false){ this.watchHistory = $('<div />',{'class':'igInnerPanelSlider'}).append($('<div />',{'class':'igInnerPanel_pre'}).addClass('igInnerPanel')) .append($('<div />',{'class':'igInnerPanel'}).datepicker({ dateFormat: 'yy-mm-dd',defaultDate: '2010-12-01' ,showWeek: true,firstDay: 1, //beforeShow:setDateStatistics(), onChangeMonthYear:function(year, month, inst) { var panelNum = 1; month = obj.leftPad(month); obj.getDays(year,month,inst,panelNum); } , beforeShowDay: obj.checkAvailability, onSelect: function(dateText, inst) { obj.checkAvailability(); } }).append($('<div />',{'class':'extraMenu'})) ) .append($('<div />',{'class':'igInnerPanel_next'}).addClass('igInnerPanel')); return this.watchHistory; } }, loadPanelContents : function(panelNum){ switch(panelNum){ case 1: alert('inside loadPanelContents') return this.initialWatchHistory(); break; case 2: return this.initialWatchHistory(); break; case 3: return this.initialWatchHistory(); break; case 4: return this.initialWatchHistory(); break; case 5: return this.initialLoginPanel(); break; } }, loadRootMenu : function(){ var obj = this; var mainMenuPanel = $('<div />',{'class':'igRootMenu'}); var currentMWId = this.igtoMW.attr('id'); this.activePanel = 0; $('#'+currentMWId+'Panel .pre'). queue(function(next){ $(this). html(mainMenuPanel). addClass('panelShow'). removeClass('pre'). attr('panelNum',0); next(); }). queue(function(next){ $('<div style="width:0;" class="slider pre"></div>'). prependTo('#'+currentMWId+'Panel').animate({width:348}, function(){ $('#'+currentMWId+'Panel .slider:last').remove() $('#'+currentMWId+'Panel .slider:last').replaceWith('<div class="slider next"></div>'); $('.btMenu').remove(); // remove bottom quick menu obj.sliding = false; $(this).removeAttr('style'); }); $('.igtoQuickMenu .active').removeClass('active'); next(); }); }, slidePanel : function(currentPanelNum){ var currentMWId = this.igtoMW.attr('id'); var obj = this; //alert(obj.loadPanelContents(currentPanelNum)); if( this.activePanel > currentPanelNum){ $('#'+currentMWId+'Panel .pre'). queue(function(next){ alert('inside slidePanel') //var initialDate = getPanelDateStatus(panelNum); //console.log('intial day in bigger panel '+initialDate) $(this). html(obj.loadPanelContents(currentPanelNum)). addClass('panelShow'). removeClass('pre'). attr('panelNum',currentPanelNum); $('#'+currentMWId+'Panel .next').remove(); next(); }). queue(function(next){ $('<div style="width:0;" class="slider pre"></div>'). prependTo('#'+currentMWId+'Panel').animate({width:348}, function(){ //$('#igto1Panel .slider:last').find(setPanel(currentPanelNum)).datepicker('destroy'); $('#'+currentMWId+'Panel .slider:last').empty().removeClass('panelShow').addClass('next').removeAttr('panelNum'); $('#'+currentMWId+'Panel .slider:last').replaceWith('<div class="slider next"></div>') obj.sliding = false;console.log('inuse inside animation: '+obj.sliding); $(this).removeAttr('style'); }); next(); }); } else{ ///// current panel num smaller than next $('#'+currentMWId+'Panel .next'). queue(function(next){ $(this). html(obj.loadPanelContents(currentPanelNum)). addClass('panelShow'). removeClass('next'). attr('panelNum',currentPanelNum); $('<div class="slider next">empty</div>').appendTo('#'+currentMWId+'Panel'); next(); }). queue(function(next){ $('#'+currentMWId+'Panel .pre').animate({width:0}, function(){ $(this).remove(); //$('#igto1Panel .slider:first').find(setPanel(currentPanelNum)).datepicker('destroy'); $('#'+currentMWId+'Panel .slider:first').empty().removeClass('panelShow').addClass('pre').removeAttr('panelNum').removeAttr('style'); $('#'+currentMWId+'Panel .slider:first').replaceWith('<div class="slider pre"></div>') obj.sliding = false; console.log('inuse inside animation: '+obj.sliding); }); next(); }); } }, getDays : function(year,month,inst,panelNum){ var obj = this; // depand on the mysql qurey condition var table_of_record = 'moviewh';//getTable(panelNum); var date_of_record = 'watching_date';//getTableDateCol(panelNum); var date_to_find = year+'-'+month; var node_of_xml_date_list = 'whDateRecords';//getXMLDateNode(panelNum); var user_id = '1';//getLoginUserId(); //var daysWithRecords = []; // empty array before asigning this.daysWithRecords.length = 0; $.ajax({ type: "GET", url: "include/get.date.list.process.php", data:({ table_of_record : table_of_record,date_of_record:date_of_record,date_to_find:date_to_find,user_id:user_id,node_of_xml_date_list:node_of_xml_date_list }), dataType: "json", cache: false, // force broser don't cache the xml file async: false, // using this option to prevent datepicker refresh ??NO success:function(data){ // had no date records if(data === null) return; obj.daysWithRecords = data; } }); //setPanelDateStatus(year,month,panelNum); console.log('call from getdays() ' + this.daysWithRecords); }, checkAvailability : function(availableDays) { // var i; var checkdate = $.datepicker.formatDate('yy-mm-dd', availableDays); //console.log( checkdate); // for(var i = 0; i < this.daysWithRecords.length; i++) { // // if(this.daysWithRecords[i] == checkdate){ // // return [true, "available"]; // } // } //console.log('inside check availablility '+ this.daysWithRecords); //return [true, "available"]; console.log(typeof this.daysWithRecords) for(i in this.daysWithRecords){ //if(this.daysWithRecords[i] == checkdate){ console.log(typeof this.daysWithRecords[i]); //return [true, "available"]; //} } return [true, "available"]; //return [false, ""]; }, leftPad : function(num) { return (num < 10) ? '0' + num : num; } }); $.fn.igtomw = function(options){ // Merge options passed in with global defaults var opt = $.extend({}, $.fn.igtomw.defaults , options); return this.each(function() { new Igtomw(this,opt); }); }; $.fn.igtomw.defaults = { // 0:mainMenu 1:whatchHistor 2:requestHistory 3:userManager // 4:shoppingCart 5:loginPanel initialPanel : 5, // default panel is LoginPanel initialQuickMenu : {'1':'whatchHIstory','2':'????','3':'????','4':'????'} // defalut quick menu }; })(jQuery); usage: $('.openMW').click(function(event){ event.preventDefault(); $('<div class="">').igtomw(); }) HTML code: <div id="taskBarAndStartMenu"> <div class="taskBarAndStartMenuM"> <a href="" class="openMW" >??IGTO</a> </div> <div class="taskBarAndStartMenuO"></div> </div> In my work flow: when I click the "whatchHistory" button, my plugin would load a panel with JQuery UI datepicker applied which days had been set to be availabled or not. I am using the function "getDays()" to get the available days list and stored the data inside daysWithRecords, and final the UI datepicker's function "beforeShowDay()" called the function "checkAvailability()" to set the days. the variable "daysWithRecords" was declared inside Igtomw = function(elem , options) and was initialized inside the function getDays() I am using the function "initialWatchHistory()" to initialization and render the JQuery UI datepicker in the web. My problem is the function "checkAvailability()" cannot see the variable "daysWithRecords".The firebug prompts me that "daysWithRecords" is "undefined". this is the first time I write my first plugin. So .... Thank you very much for any help!!

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  • Class Issue (The type XXX is already defined )

    - by Android Stack
    I have listview app exploring cities each row point to diffrent city , in each city activity include button when clicked open new activity which is infinite gallery contains pics of that city , i add infinite gallery to first city and work fine , when i want to add it to the second city , it gave me red mark error in the class as follow : 1- The type InfiniteGalleryAdapter is already defined. 2-The type InfiniteGallery is already defined. i tried to change class name with the same result ,i delete R.jave and eclipse rebuild it with same result also i uncheck the java builder from project properties ,get same red mark error. please any help and advice will be appreciated thanks My Code : public class SecondCity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Boolean customTitleSupported = requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); // Set the layout to use setContentView(R.layout.main); if (customTitleSupported) { getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.custom_title); TextView tv = (TextView) findViewById(R.id.tv); Typeface face=Typeface.createFromAsset(getAssets(),"BFantezy.ttf"); tv.setTypeface(face); tv.setText("MY PICTURES"); } InfiniteGallery galleryOne = (InfiniteGallery) findViewById(R.id.galleryOne); galleryOne.setAdapter(new InfiniteGalleryAdapter(this)); } } class InfiniteGalleryAdapter extends BaseAdapter { **//red mark here (InfiniteGalleryAdapter)** private Context mContext; public InfiniteGalleryAdapter(Context c, int[] imageIds) { this.mContext = c; } public int getCount() { return Integer.MAX_VALUE; } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } private LayoutInflater inflater=null; public InfiniteGalleryAdapter(Context a) { this.mContext = a; inflater = (LayoutInflater)mContext.getSystemService ( Context.LAYOUT_INFLATER_SERVICE); } public class ViewHolder{ public TextView text; public ImageView image; } private int[] images = { R.drawable.pic_1, R.drawable.pic_2, R.drawable.pic_3, R.drawable.pic_4, R.drawable.pic_5 }; private String[] name = { "This is first picture (1) " , "This is second picture (2)", "This is third picture (3)", "This is fourth picture (4)", " This is fifth picture (5)", }; public View getView(int position, View convertView, ViewGroup parent) { ImageView i = getImageView(); int itemPos = (position % images.length); try { i.setImageResource(images[itemPos]); ((BitmapDrawable) i.getDrawable()). setAntiAlias (true); } catch (OutOfMemoryError e) { Log.e("InfiniteGalleryAdapter", "Out of memory creating imageview. Using empty view.", e); } View vi=convertView; ViewHolder holder; if(convertView==null){ vi = inflater.inflate(R.layout.gallery_items, null); holder=new ViewHolder(); holder.text=(TextView)vi.findViewById(R.id.textView1); holder.image=(ImageView)vi.findViewById(R.id.image); vi.setTag(holder); } else holder=(ViewHolder)vi.getTag(); holder.text.setText(name[itemPos]); final int stub_id=images[itemPos]; holder.image.setImageResource(stub_id); return vi; } private ImageView getImageView() { ImageView i = new ImageView(mContext); return i; } } class InfiniteGallery extends Gallery { **//red mark here (InfiniteGallery)** public InfiniteGallery(Context context) { super(context); init(); } public InfiniteGallery(Context context, AttributeSet attrs) { super(context, attrs); init(); } public InfiniteGallery(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(); } private void init(){ // These are just to make it look pretty setSpacing(25); setHorizontalFadingEdgeEnabled(false); } public void setResourceImages(int[] name){ setAdapter(new InfiniteGalleryAdapter(getContext(), name)); setSelection((getCount() / 2)); } }

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  • PHP: Proper way of using a PDO database connection in a class

    - by Cortopasta
    Trying to organize all my code into classes, and I can't get the database queries to work inside a class. I tested it without the class wrapper, and it worked fine. Inside the class = no dice. What about my classes is messing this up? class ac { public function dbConnect() { global $dbcon; $dbInfo['server'] = "localhost"; $dbInfo['database'] = "sn"; $dbInfo['username'] = "sn"; $dbInfo['password'] = "password"; $con = "mysql:host=" . $dbInfo['server'] . "; dbname=" . $dbInfo['database']; $dbcon = new PDO($con, $dbInfo['username'], $dbInfo['password']); $dbcon->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $error = $dbcon->errorInfo(); if($error[0] != "") { print "<p>DATABASE CONNECTION ERROR:</p>"; print_r($error); } } public function authentication() { global $dbcon; $plain_username = $_POST['username']; $md5_password = md5($_POST['password']); $ac = new ac(); if (is_int($ac->check_credentials($plain_username, $md5_password))) { ?> <p>Welcome!</p> <!--go to account manager here--> <?php } else { ?> <p>Not a valid username and/or password. Please try again.</p> <?php unset($_POST['username']); unset($_POST['password']); $ui = new ui(); $ui->start(); } } private function check_credentials($plain_username, $md5_password) { global $dbcon; $userid = $dbcon->prepare('SELECT id FROM users WHERE username = :username AND password = :password LIMIT 1'); $userid->bindParam(':username', $plain_username); $userid->bindParam(':password', $md5_password); $userid->execute(); print_r($dbcon->errorInfo()); $id = $userid->fetch(); Return $id; } } And if it's any help, here's the class that's calling it: require_once("ac/acclass.php"); $ac = new ac(); $ac->dbconnect(); class ui { public function start() { if ((!isset($_POST['username'])) && (!isset($_POST['password']))) { $ui = new ui(); $ui->loginform(); } else { $ac = new ac(); $ac->authentication(); } } private function loginform() { ?> <form id="userlogin" action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post"> User:<input type="text" name="username"/><br/> Password:<input type="password" name="password"/><br/> <input type="submit" value="submit"/> </form> <?php } }

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  • How to call a C# DLL from InstallerClass overrides?

    - by simpleton
    I have a setup and deployment project. In it I have an Installer.cs class, created from the basic Installer Class template. In the Install override, I have this code taken from http://msdn.microsoft.com/en-us/library/d9k65z2d.aspx. public override void Install(IDictionary stateSaver) { base.Install(stateSaver); System.Diagnostics.Process.Start("http://www.microsoft.com"); } Everything works when I install the application, but the problem arises when I try to call anything from an external C# class library that I also wrote. Example: public override void Install(IDictionary stateSaver) { base.Install(stateSaver); System.Diagnostics.Process.Start("http://www.microsoft.com"); MyLibrary.SomeMethod(); } The problem is, I don't believe the library call is actually happening. I tagged the entire process line by line, with EventLog.WriteEvent()s, and each line in the Install override is seemlingly 'hit', putting entries in the event log, but I do not receive any exceptions for the library call SomeMethod(), yet the EventLog entries and other actions inside SomeMethod() are never created nor any of its actions taken. Any ideas?

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  • Unit Testing Refcounted Critical Section Class

    - by BillyONeal
    Hello all :) I'm looking at a simple class I have to manage critical sections and locks, and I'd like to cover this with test cases. Does this make sense, and how would one go about doing it? It's difficult because the only way to verify the class works is to setup very complicated threading scenarios, and even then there's not a good way to test for a leak of a Critical Section in Win32. Is there a more direct way to make sure it's working correctly? Here's the code: CriticalSection.hpp: #pragma once #include <windows.h> namespace WindowsAPI { namespace Threading { class CriticalSection; class CriticalLock { std::size_t *instanceCount; CRITICAL_SECTION * criticalStructure; bool lockValid; friend class CriticalSection; CriticalLock(std::size_t *, CRITICAL_SECTION *, bool); public: bool IsValid() { return lockValid; }; void Unlock(); ~CriticalLock() { Unlock(); }; }; class CriticalSection { std::size_t *instanceCount; CRITICAL_SECTION * criticalStructure; public: CriticalSection(); CriticalSection(const CriticalSection&); CriticalSection& operator=(const CriticalSection&); CriticalSection& swap(CriticalSection&); ~CriticalSection(); CriticalLock Enter(); CriticalLock TryEnter(); }; }} CriticalSection.cpp: #include "CriticalSection.hpp" namespace WindowsAPI { namespace Threading { CriticalSection::CriticalSection() { criticalStructure = new CRITICAL_SECTION; instanceCount = new std::size_t; *instanceCount = 1; InitializeCriticalSection(criticalStructure); } CriticalSection::CriticalSection(const CriticalSection& other) { criticalStructure = other.criticalStructure; instanceCount = other.instanceCount; instanceCount++; } CriticalSection& CriticalSection::operator=(const CriticalSection& other) { CriticalSection copyOfOther(other); swap(copyOfOther); return *this; } CriticalSection& CriticalSection::swap(CriticalSection& other) { std::swap(other.instanceCount, instanceCount); std::swap(other.criticalStructure, other.criticalStructure); return *this; } CriticalSection::~CriticalSection() { if (!--(*instanceCount)) { DeleteCriticalSection(criticalStructure); delete criticalStructure; delete instanceCount; } } CriticalLock CriticalSection::Enter() { EnterCriticalSection(criticalStructure); (*instanceCount)++; return CriticalLock(instanceCount, criticalStructure, true); } CriticalLock CriticalSection::TryEnter() { bool lockAquired; if (TryEnterCriticalSection(criticalStructure)) { (*instanceCount)++; lockAquired = true; } else lockAquired = false; return CriticalLock(instanceCount, criticalStructure, lockAquired); } void CriticalLock::Unlock() { if (!lockValid) return; LeaveCriticalSection(criticalStructure); lockValid = false; if (!--(*instanceCount)) { DeleteCriticalSection(criticalStructure); delete criticalStructure; delete instanceCount; } } }}

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  • I need an abstract field !

    - by Jules Olléon
    I know abstract fields do not exist in java. I also read this question but the solutions proposed won't solve my problem. Maybe there is no solution, but it's worth asking :) Problem I have an abstract class that does an operation in the constructor depending on the value of one of its fields. The problem is that the value of this field will change depending on the subclass. How can I do so that the operation is done on the value of the field redefined by the subclass ? If I just "override" the field in the subclass the operation is done on the value of the field in the abstract class. I'm open to any solution that would ensure that the operation will be done during the instantiation of the subclass (ie putting the operation in a method called by each subclass in the constructor is not a valid solution, because someone might extend the abstract class and forget to call the method). Also, I don't want to give the value of the field as an argument of the constructor. Is there any solution to do that, or should I just change my design ?

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