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• Render different view depending on the type of the data

  - by Miau

  Hi there So lets suppose we have an action in a controller that looks a bit like this: public ViewResult SomeAction(int id) { var data = _someService.GetData(id); ... //create new view model based on the data here return View(viewModel); } What I m trying to figure out is the best way to render a diferent view based on the type fo the data. the "_someService.GetData method returns an data that knows its out type (ie not only you can do typeof(data) but also you can do data.DataType and you ll get an enum value so I could achieve what I m trying to do doing something kinda like this public ViewResult SomeAction(int id) { var data = _someService.GetData(id); //I m mapping fields to the viewModel here var viewModel = GetViewModel(data); swtich(data.DataType) case DataType.TypeOne: return View("TypeOne", viewModel); break; ... } But this does not seem to be the nicest way, (I dont event know if it would work) Is this the way to go? Should I use some sort of RenderPartial Aproach? after all , waht will change in the view is mostly the order of the data (ie the rest of the view would be quite similar) Cheers

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• "error: Expected a type, got 'classname'" in C++

  - by Bay

  Using the following code: template <typename T> class node { [. . .] }; class b_graph { friend istream& operator>> (istream& in, b_graph& ingraph); friend ostream& operator<< (ostream& out, b_graph& outgraph); public: [...] private: vector<node> vertices; //This line I'm getting: error: type/value mismatch at argument 1 in template parameter list for ‘template<class _Tp, class _Alloc> class std::vector’ error: expected a type, got 'node' error: template argument 2 is invalid On the indicated line. Node is clearly defined before b_graph which uses it - what have I done here?

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• C# casting question: from IEnumerable to custom type

  - by Sarah Vessels

  I have a custom class called Rows that implements IEnumerable<Row>. I often use LINQ queries on Rows instances: Rows rows = new Rows { row1, row2, row3 }; IEnumerable<Row> particularRows = rows.Where<Row>(row => condition); What I would like is to be able to do the following: Rows rows = new Rows { row1, row2, row3 }; Rows particularRows = (Rows)rows.Where<Row>(row => condition); However, I get a "System.InvalidCastException: Unable to cast object of type 'WhereEnumerableIterator1[NS.Row]' to type 'NS.Rows'". I do have a Rows constructor taking IEnumerable<Row>, so I could do: Rows rows = new Rows { row1, row2, row3 }; Rows particularRows = new Rows(rows.Where<Row>(row => condition)); This seems bulky, however, and I would love to be able to cast an IEnumerable<Row> to be a Rows since Rows implements IEnumerable<Row>. Any ideas?

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• C# specifying generic delegate type param at runtime

  - by smerlin

  following setup, i have several generic functions, and i need to choose the type and the function identified by two strings at runtime. my first try looked like this: public static class FOOBAR { public delegate void MyDelegateType(int param); public static void foo<T>(int param){...} public static void bar<T>(int param){...} public static void someMethod(string methodstr, string typestr) { MyDelegateType mydel; Type mytype; switch(typestr) { case "int": mytype = typeof(int); break; case "double": mytype = typeof(double); break; default: throw new InvalidTypeException(typestr); } switch(methodstr) { case "foo": mydel = foo<mytype>; //error break; case "bar": mydel = bar<mytype>; //error break; default: throw new InvalidTypeException(methodstr); } for(int i=0; i<1000; ++i) mydel(i); } } since this didnt work, i nested those switchs (a methodstr switch inside the typestr switch or viceversa), but that solution is really ugly and unmaintainable. The number of types is pretty much fixed, but the number of functions like foo or bar will increase by high numbers, so i dont want nested switchs. So how can i make this working without using nested switchs ?

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• Cannot implicitly convert type ...

  - by Newbie

  I have the following function public Dictionary<DateTime, object> GetAttributeList( EnumFactorType attributeType ,Thomson.Financial.Vestek.Util.DateRange dateRange) { DateTime startDate = dateRange.StartDate; DateTime endDate = dateRange.EndDate; return (( //Step 1: Iterate over the attribute list and filter the records by // the supplied attribute type from assetAttribute in AttributeCollection where assetAttribute.AttributeType.Equals(attributeType) //Step2:Assign the TimeSeriesData collection into a temporary variable let timeSeriesList = assetAttribute.TimeSeriesData //Step 3: Iterate over the TimeSeriesData list and filter the records by // the supplied date from timeSeries in timeSeriesList.ToList() where timeSeries.Key >= startDate && timeSeries.Key <= endDate //Finally build the needed collection select new AssetAttribute() { TimeSeriesData = PopulateTimeSeriesData(timeSeries.Key, timeSeries.Value) }).ToList<AssetAttribute>().Select(i => i.TimeSeriesData)); } private Dictionary<DateTime, object> PopulateTimeSeriesData(DateTime dateTime, object value) { Dictionary<DateTime, object> timeSeriesData = new Dictionary<DateTime, object>(); timeSeriesData.Add(dateTime, value); return timeSeriesData; } Error:Cannot implicitly convert type 'System.Collections.Generic.IEnumerable' to 'System.Collections.Generic.Dictionary'. An explicit conversion exists (are you missing a cast?) Using C#3.0 Please help

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• Determining presence of prototype with correct return type

  - by R..

  Here's a random problem in C black magic I just came up with: Write a function that returns 1 if malloc has been prototyped to return a pointer type and 0 if malloc has a return type of int (either implicitly or due to wrong prototype), without invoking any implementation-defined or undefined behavior. I believe it's solvable, but I haven't worked out the solution. Note that calling the function cannot be necessary and in fact is not possible since calling a function with the incorrect prototype is undefined behavior. I have some ideas for ingredients but I think it makes for a better puzzle (and possibly more diverse ideas) if I leave them out for now. I don't need the solution for any immediate use, but it could be handy in configure scripts and such. Update: A better example of the usefulness (with strdup instead of malloc): #undef strdup #define strdup(x) (strdup_has_proto ? strdup((x)) : my_strdup((x))) i.e. being able to implement X_has_proto as an expression at the source level could be a portable way to use functions which a system might or might not have, and fall back on a local replacement, without needing any separate configure step.

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• Cast exception being generated when using the same type of object

  - by David Tunnell

  I was previously using static variables to hold variable data that I want to save between postbacks. I was having problems and found that the data in these variables is lost when the appdomain ends. So I did some research and decided to go with ViewStates: static Dictionary<string, linkButtonObject> linkButtonDictonary; protected void Page_Load(object sender, EventArgs e) { if (ViewState["linkButtonDictonary"] != null) { linkButtonDictonary = (Dictionary<string, linkButtonObject>)ViewState["linkButtonDictonary"]; } else { linkButtonDictonary = new Dictionary<string, linkButtonObject>(); } } And here is the very simple class I use: [Serializable] public class linkButtonObject { public string storyNumber { get; set; } public string TaskName { get; set; } } I am adding to linkButtonDictionary as a gridview is databound: protected void hoursReportGridView_OnRowDataBound(Object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { LinkButton btn = (LinkButton)e.Row.FindControl("taskLinkButton"); linkButtonObject currentRow = new linkButtonObject(); currentRow.storyNumber = e.Row.Cells[3].Text; currentRow.TaskName = e.Row.Cells[5].Text; linkButtonDictonary.Add(btn.UniqueID, currentRow); } } It appears that my previous issues are resolved however a new one has arisin. Sometime when I postback I am getting this error: [A]System.Collections.Generic.Dictionary2[System.String,linkButtonObject] cannot be cast to [B]System.Collections.Generic.Dictionary2[System.String,linkButtonObject]. Type A originates from 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' in the context 'LoadNeither' at location 'C:\Windows\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll'. Type B originates from 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' in the context 'LoadNeither' at location 'C:\Windows\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll'. I don't understand how there can be a casting issue when I am using the same class everywhere. What am I doing wrong and how do I fix it?

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• Python list recursion type error

  - by Jacob J Callahan

  I can't seem to figure out why the following code is giving me a TypeError: 'type' object is not iterable pastebin: http://pastebin.com/VFZYY4v0 def genList(self): #recursively generates a sorted list of child node values numList = [] if self.leftChild != 'none': numList.extend(self.leftChild.genList()) #error numList.extend(list((self.Value,))) if self.rightChild != 'none': numList.extend(self.rightChild.genList()) #error return numList code that adds child nodes (works correctly) def addChild(self, child): #add a child node. working if child.Value < self.Value: if self.leftChild == 'none': self.leftChild = child child.parent = self else: self.leftChild.addChild(child) elif child.Value > self.Value: if self.rightChild == 'none': self.rightChild = child child.parent = self else: self.rightChild.addChild(child) Any help would be appreciated. Full interpreter session: >>> import BinTreeNode as BTN >>> node1 = BTN.BinaryTreeNode(5) >>> node2 = BTN.BinaryTreeNode(2) >>> node3 = BTN.BinaryTreeNode(12) >>> node3 = BTN.BinaryTreeNode(16) >>> node4 = BTN.BinaryTreeNode(4) >>> node5 = BTN.BinaryTreeNode(13) >>> node1.addChild(node2) >>> node1.addChild(node3) >>> node1.addChild(node4) >>> node1.addChild(node5) >>> node4.genList() <class 'list'> >>> node1.genList() Traceback (most recent call last): File "<interactive input>", line 1, in <module> File "C:...\python\BinTreeNode.py", line 47, in genList numList.extend(self.leftChild.genList()) #error File "C:...\python\BinTreeNode.py", line 52, in genList TypeError: 'type' object is not iterable

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• how to solve a weired swig python c++ interfacing type error

  - by user2981648

  I want to use swig to switch a simple cpp function to python and use "scipy.integrate.quadrature" function to calculate the integration. But python 2.7 reports a type error. Do you guys know what is going on here? Thanks a lot. Furthermore, "scipy.integrate.quad" runs smoothly. So is there something special for "scipy.integrate.quadrature" function? The code is in the following: File "testfunctions.h": #ifndef TESTFUNCTIONS_H #define TESTFUNCTIONS_H double test_square(double x); #endif File "testfunctions.cpp": #include "testfunctions.h" double test_square(double x) { return x * x; } File "swig_test.i" : /* File : swig_test.i */ %module swig_test %{ #include "testfunctions.h" %} /* Let's just grab the original header file here */ %include "testfunctions.h" File "test.py": import scipy.integrate import _swig_test print scipy.integrate.quadrature(_swig_test.test_square, 0., 1.) error info: UMD has deleted: _swig_test Traceback (most recent call last): File "<stdin>", line 1, in <module> File "C:\Python27\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 523, in runfile execfile(filename, namespace) File "D:\data\haitaliu\Desktop\Projects\swig_test\Release\test.py", line 4, in <module> print scipy.integrate.quadrature(_swig_test.test_square, 0., 1.) File "C:\Python27\lib\site-packages\scipy\integrate\quadrature.py", line 161, in quadrature newval = fixed_quad(vfunc, a, b, (), n)[0] File "C:\Python27\lib\site-packages\scipy\integrate\quadrature.py", line 61, in fixed_quad return (b-a)/2.0*sum(w*func(y,*args),0), None File "C:\Python27\lib\site-packages\scipy\integrate\quadrature.py", line 90, in vfunc return func(x, *args) TypeError: in method 'test_square', argument 1 of type 'double'

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• Strange type-related error

  - by vsb

  I wrote following program: isPrime x = and [x `mod` i /= 0 | i <- [2 .. truncate (sqrt x)]] primes = filter isPrime [1 .. ] it should construct list of prime numbers. But I got this error: [1 of 1] Compiling Main ( 7/main.hs, interpreted ) 7/main.hs:3:16: Ambiguous type variable `a' in the constraints: `Floating a' arising from a use of `isPrime' at 7/main.hs:3:16-22 `RealFrac a' arising from a use of `isPrime' at 7/main.hs:3:16-22 `Integral a' arising from a use of `isPrime' at 7/main.hs:3:16-22 Possible cause: the monomorphism restriction applied to the following: primes :: [a] (bound at 7/main.hs:3:0) Probable fix: give these definition(s) an explicit type signature or use -XNoMonomorphismRestriction Failed, modules loaded: none. If I specify signature for isPrime function explicitly: isPrime :: Integer -> Bool isPrime x = and [x `mod` i /= 0 | i <- [2 .. truncate (sqrt x)]] I can't even compile isPrime function: [1 of 1] Compiling Main ( 7/main.hs, interpreted ) 7/main.hs:2:45: No instance for (RealFrac Integer) arising from a use of `truncate' at 7/main.hs:2:45-61 Possible fix: add an instance declaration for (RealFrac Integer) In the expression: truncate (sqrt x) In the expression: [2 .. truncate (sqrt x)] In a stmt of a list comprehension: i <- [2 .. truncate (sqrt x)] 7/main.hs:2:55: No instance for (Floating Integer) arising from a use of `sqrt' at 7/main.hs:2:55-60 Possible fix: add an instance declaration for (Floating Integer) In the first argument of `truncate', namely `(sqrt x)' In the expression: truncate (sqrt x) In the expression: [2 .. truncate (sqrt x)] Failed, modules loaded: none. Can you help me understand, why am I getting these errors?

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• What else I must do allow my method to handle any type of objects

  - by NewHelpNeeder

  So to allow any type object I must use generics in my code. I have rewrote this method to do so, but then when I create an object, for example Milk, it won't let me pass it to my method. Ether there's something wrong with my generic revision, or Milk object I created is not good. How should I pass my object correctly and add it to linked list? This is a method that causes error when I insert an item: public void insertFirst(T dd) // insert at front of list { Link newLink = new Link(dd); // make new link if( isEmpty() ) // if empty list, last = newLink; // newLink <-- last else first.previous = newLink; // newLink <-- old first newLink.next = first; // newLink --> old first first = newLink; // first --> newLink } This is my class I try to insert into linked list: class Milk { String brand; double size; double price; Milk(String a, double b, double c) { brand = a; size = b; price = c; } } This is test method to insert the data: public static void main(String[] args) { // make a new list DoublyLinkedList theList = new DoublyLinkedList(); // this causes: // The method insertFirst(Comparable) in the type DoublyLinkedList is not applicable for the arguments (Milk) theList.insertFirst(new Milk("brand", 1, 2)); // insert at front theList.displayForward(); // display list forward theList.displayBackward(); // display list backward } // end main() } // end class DoublyLinkedApp Declarations: class Link<T extends Comparable<T>> {} class DoublyLinkedList<T extends Comparable<T>> {}

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• Setting the type of a field in a superclass from a subclass (Java)

  - by Ibolit

  Hi. I am writing a project on Google App Engine, within it I have a number of abstract classes that I hope I will be able to use in my future projects, and a number of concrete classes inheriting from them. Among other abstract classes I have an abstract servlet that does user management, and I hava an abstract user. The AbstractUser has all the necessary fields and methods for storing it in the datastore and telling whether the user is registered with my service or not. It does not implement any project specific functionality. The abstract servlet that manages users, refers only to the methods declared in the AbstractUser class, which allows it to generate links for logging in, logging out and registering (for unregistered users). In order to implement the project-specific user functionality I need to subclass the Abstract user. The servlets I use in my project are all indirect descendants from that abstract user management servlet, and the user is a protected field in it, so the descendant servlets can use it as their own field. However, whenever i want to access any project specific method of the concrete user, i need to cast it to that type. i.e. (abstract user managing servlet) ... AbstractUser user = getUser(); ... abstract protected AbstractUser getUser(); (project-specific abstract servlet) @Override protected AbstractUser getUser() { return MyUserFactory.getUser(); } any other project specific servlet: int a = ((ConcreteUser) user).getA(); Well, what i'd like to do is to somehow make the type of “user” in the superclass depend on something in the project-specific abstract class. Is it at all possible? And i don't want to move all the user-management stuff into a project-specific layer, for i would like to have it for my future projects already written :) Thank you for your help.

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• Storing C++ templated objects as same type

  - by JaredC

  I have a class that is a core component of a performance sensitive code path, so I am trying to optimize it as much as possible. The class used to be: class Widget { Widget(int n) : N(n) {} .... member functions that use the constant value N .... const int N; // just initialized, will never change } The arguments to the constructor are known at compile time, so I have changed this class to a template, so that N can be compiled into the functions: template<int N> class Widget { .... member functions that use N .... } I have another class with a method: Widget & GetWidget(int index); However, after templating Widget, each widget has a different type so I cannot define the function like this anymore. I considered different inheritance options, but I'm not sure that the performance gain from the template would outweigh the cost of inherited function invocations. SO, my question is this: I am pretty sure I want the best of both worlds (compile-time / run-time), and it may not be possible. But, is there a way to gain the performance of knowing N at compile time, but still being able to return Widgets as the same type? Thanks!

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• Bind WPF control with property of custom type

  - by TheBlueSky

  Hello everyone, I'm trying to bind a Label's 'Content' property to a property from some custom type I have; unfortunately, I didn't figure out how to do it, and that's why I'm here :) Let's assume that I have the following type (can be in the same namespace as my WPF Window that contains the Label or different namespace): namespace MyNS { pubic class Person { private int age = 0; public int Age { get { return age; } } public void GetOlder { age++; } } } 1) How to I bind my Label to 'Age' property? 2) At runtime I will create an instance of 'Person'; I want to make sure that my Label is bound to the right instance; i.e. if I called: Person SomePerson = new Person(); SomePerson.GetOlder(); I want my Lable to have the new value of 'Age' property for 'SomePerson'. 3) If #2 was possible (I hope so), what if I called 'GetOlder' in different thread? Will I still get the latest value of 'Age'? Or do I have to take care of some other things as well to make this scenario possible? Thanks in advance, TheBlueSky

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• Get node parent of defined type using xpath

  - by IordanTanev

  Hi, i will give an example of the problem i have. My XML is like this <roor> <child Name = "child1"> <node> <element1>Value1</element1> <element2>Value2</element2> </node> </child> <child Name = "child2"> <element1>Value1</element1> <element2>Value2</element2> <element3>Value3</element3> </child> </root> I have xpath expression that returns all "element2" nodes. Then i want to for every node of type "element2" to find the node of type "child" that contains it. The problem is that between these two nodes there can be from 1 to n different nodes so i can't just use "..". Is there something like "//" that will look up instead of down Best Regards, Iordan

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• Wrong class type in objective C

  - by Max Hui

  I have a parent class and a child class. GameObjectBase (parent) GameObjectPlayer(child). When I override a method in Child class and call it using [myPlayerClass showNextFrame] It is calling the parent class one. It turns out in the debugger, I see the myPlayerClass was indeed class type GameObjectBase (which is the parent class) How come? GameObjectBase.h #import <Foundation/Foundation.h> #import "cocos2d.h" @class GameLayer; @interface GameObjectBase : NSObject { /* CCSprite *gameObjectSprite; // Sprite representing this game object GameLayer *parentGameLayer; */ // Reference of the game layer this object // belongs to } @property (nonatomic, assign) CCSprite *gameObjectSprite; @property (nonatomic, assign) GameLayer *parentGameLayer; // Class method. Autorelease + (id) initWithGameLayer:(GameLayer *) gamelayer imageFileName:(NSString *) fileName; // "Virtual methods" that the derived class should implement. // If not implemented, this method will be called and Assert game - (void) update: (ccTime) dt; - (void) showNextFrame; @end GameObjectPlayer.h #import <Foundation/Foundation.h> #import "GameObjectBase.h" @interface GameObjectPlayer : GameObjectBase { int direction; } @property (nonatomic) int direction; @end GameLayer.h #import "cocos2d.h" #import "GameObjectPlayer.h" @interface GameLayer : CCLayer { } // returns a CCScene that contains the GameLayer as the only child +(CCScene *) scene; @property (nonatomic, strong) GameObjectPlayer *player; @end When I call examine in debugger what type "temp" is in this function inside GameLayer class, it's giving parent class GameObjectBase instead of subclass GameObjectPlayer - (void) update:(ccTime) dt { GameObjectPlayer *temp = _player; [temp showNextFrame]; }

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• Problems deploying MVC2 - Could not load type 'System.Web.Mvc.UrlParameter'

  - by Evgeny

  Hi Everyone, I have problems deploying MVC2 application to my hosting. It shows the following error: Could not load type 'System.Web.Mvc.UrlParameter' from assembly 'System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. It looks like it does not understand the new "optional URL parameters" feature of MVC2. This is just a simple test application I created with "New Project" wizard in VWD 2008. It works ok localy both in IIS and Visual Studio web servers. MVC1 web sites are working ok on the hosting server. I've contacted the hosting support and they installed MVC2 but the problem still exists. The web site is working in ASP.NET 2.0 integrated pipeline mode. Does anyone know why it is happening? Thank you!

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• describe class versions of primitive type data

  - by paula

  please some explain to me this.... Explain why java has class versios of primitive data types? describe the class versions of primitive java types and expain pros and cons? expalin why class versions of primitive java types are available, but why the primitive types are still frequently used? expalin how primitive and non-primitive data types are passed as parameters to methods in java and how that affects altering the value of data passed? primitve data types are: int, float, char, long, short, byte, boolean and double.

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• ANY way to consolidate this code?

  - by JM4

  I am building a PHP registration form which takes the following fields for up to 20 athletes: First Name Middle Initial Last Name Federation Number Address City State Zip DOB SSN Phone Email I am only through 7 of the fields for each fighter and my php file is very large (over 40kb). Is there ANY way to consolidate this code at all? I am also having to validate the information on each field (as I said - 20 athletes x 12 fields = 240 validations on a single page). If I can send any further code let me know! <form id="Form" action="<?php $_SERVER['PHP_SELF']; ?>" method="post" name="Form" onsubmit="return Enroll_Form_Validator(this)"> <p class="title">Your Fighters' Information</p> <p>Please complete the following fields with your <span style="color:red;"> Fighters' Information</span> to continue your enrollment.</p> <br /> <?php // if $errors is not empty, the form must have failed one or more validation // tests. Loop through each and display them on the page for the user if (!empty($errors)) { echo "<div class='error'>Please fix the following errors:\n<ul>"; foreach ($errors as $error) echo "<li>$error</li>\n"; echo "</ul></div>"; } ?> <?php if ($_SESSION['Num_Fighters'] > "0") { ?> <table class="demoTable"> <tr> <td>First Name: </td> <td><input type="text" name="F1FirstName" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F1FirstName']; ?>" /></td> </tr> <tr> <td>Middle Initial: </td> <td><input type="text" name="F1MI" size="2" maxlength="1" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F1MI']; ?>" /></td> </tr> <tr> <td>Last Name: </td> <td><input type="text" name="F1LastName" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F1LastName']; ?>" /></td> </tr> <tr> <td>Federation No: </td> <td><input type="text" name="F1FedNum" maxlength="10" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F1FedNum']; ?>" /></td> </tr> <tr> <td>SSN: </td> <td><input type="text" name="F1SSN1" size="3" maxlength="3" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F1SSN1']; ?>" /> - <input type="text" name="F1SSN2" size="2" maxlength="2" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F1SSN2']; ?>" /> - <input type="text" name="F1SSN3" size="4" maxlength="4" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F1SSN3']; ?>" /> </td> </tr> <tr> <td>Date of Birth</td> <td> <select name="F1DOB1"> <option value="">Month</option> <?php for ($i=1; $i<=12; $i++) { echo "<option value='$i'"; if ($fields["F1DOB1"] == $i) echo " selected"; echo ">$i</option>"; } ?> </select> / <select name="F1DOB2"> <option value="">Day</option> <?php for ($i=1; $i<=31; $i++) { echo "<option value='$i'"; if ($fields["F1DOB2"] == $i) echo " selected"; echo ">$i</option>"; } ?> </select> / <select name="F1DOB3"> <option value="">Year</option> <?php for ($i=date('Y'); $i>=1900; $i--) { echo "<option value='$i'"; if ($fields["F1DOB3"] == $i) echo " selected"; echo ">$i</option>"; } ?> </select> </td> </tr> <tr> <td>Address: </td> <td><input type="text" name="F1Address" value="<?php echo $fields['F1Address']; ?>" /></td> </tr> <tr> <td>City: </td> <td><input type="text" name="F1City" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F1City']; ?>" /></td> </tr> <tr> <td>State: </td> <td><select name="F1State"><option value="">Choose a State</option><?php showOptionsDrop($states_arr, null, true); ?></select></td> </tr> <tr> <td>Zip Code: </td> <td><input type="text" name="F1Zip" size="6" maxlength="5" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F1Zip']; ?>" /></td> </tr> <tr> <td>Contact Telephone No: </td> <td>( <input type="text" name="F1Phone1" size="3" maxlength="3" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F1Phone1']; ?>" /> ) <input type="text" name="F1Phone2" size="3" maxlength="3" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F1Phone2']; ?>" /> - <input type="text" name="F1Phone3" size="4" maxlength="4" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F1Phone3']; ?>" /> </td> </tr> <tr> <td>Email:</td> <td><input type="text" name="F1Email" value="<?php echo $fields['F1Email']; ?>" /></td> </tr> </table> <?php } ?> <br /> <?php if ($_SESSION['Num_Fighters'] > "1") { ?> <table class="demoTable"> <tr> <td>First Name: </td> <td><input type="text" name="F2FirstName" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F2FirstName']; ?>" /></td> </tr> <tr> <td>Middle Initial: </td> <td><input type="text" name="F2MI" size="2" maxlength="1" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F2MI']; ?>" /></td> </tr> <tr> <td>Last Name: </td> <td><input type="text" name="F2LastName" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F2LastName']; ?>" /></td> </tr> <tr> <td>Federation No: </td> <td><input type="text" name="F2FedNum" maxlength="10" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F2FedNum']; ?>" /></td> </tr> <tr> <td>SSN: </td> <td><input type="text" name="F2SSN1" size="3" maxlength="3" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F2SSN1']; ?>" /> - <input type="text" name="F2SSN2" size="2" maxlength="2" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F2SSN2']; ?>" /> - <input type="text" name="F2SSN3" size="4" maxlength="4" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F2SSN3']; ?>" /> </td> </tr> <tr> <td>Date of Birth</td> <td> <select name="F2DOB1"> <option value="">Month</option> <?php for ($i=1; $i<=12; $i++) { echo "<option value='$i'"; if ($fields["F2DOB1"] == $i) echo " selected"; echo ">$i</option>"; } ?> </select> / <select name="F2DOB2"> <option value="">Day</option> <?php for ($i=1; $i<=31; $i++) { echo "<option value='$i'"; if ($fields["F2DOB2"] == $i) echo " selected"; echo ">$i</option>"; } ?> </select> / <select name="F2DOB3"> <option value="">Year</option> <?php for ($i=date('Y'); $i>=1900; $i--) { echo "<option value='$i'"; if ($fields["F2DOB3"] == $i) echo " selected"; echo ">$i</option>"; } ?> </select> </td> </tr> <tr> <td>Address: </td> <td><input type="text" name="F2Address" value="<?php echo $fields['F2Address']; ?>" /></td> </tr> <tr> <td>City: </td> <td><input type="text" name="F2City" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F2City']; ?>" /></td> </tr> <tr> <td>State: </td> <td><select name="F2State"><option value="">Choose a State</option><?php showOptionsDrop($states_arr, null, true); ?></select></td> </tr> <tr> <td>Zip Code: </td> <td><input type="text" name="F2Zip" size="6" maxlength="5" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F2Zip']; ?>" /></td> </tr> <tr> <td>Contact Telephone No: </td> <td>( <input type="text" name="F2Phone1" size="3" maxlength="3" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F2Phone1']; ?>" /> ) <input type="text" name="F2Phone2" size="3" maxlength="3" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F2Phone2']; ?>" /> - <input type="text" name="F2Phone3" size="4" maxlength="4" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F2Phone3']; ?>" /> </td> </tr> <tr> <td>Email:</td> <td><input type="text" name="F2Email" value="<?php echo $fields['F2Email']; ?>" /></td> </tr> </table> <?php } ?> <br /> <?php if ($_SESSION['Num_Fighters'] > "2") { ?> <table class="demoTable"> <tr> <td>First Name: </td> <td><input type="text" name="F3FirstName" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F3FirstName']; ?>" /></td> </tr> <tr> <td>Middle Initial: </td> <td><input type="text" name="F3MI" size="2" maxlength="1" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F3MI']; ?>" /></td> </tr> <tr> <td>Last Name: </td> <td><input type="text" name="F3LastName" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F3LastName']; ?>" /></td> </tr> <tr> <td>Federation No: </td> <td><input type="text" name="F3FedNum" maxlength="10" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F3FedNum']; ?>" /></td> </tr> <tr> <td>SSN: </td> <td><input type="text" name="F3SSN1" size="3" maxlength="3" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F3SSN1']; ?>" /> - <input type="text" name="F3SSN2" size="2" maxlength="2" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F3SSN2']; ?>" /> - <input type="text" name="F3SSN3" size="4" maxlength="4" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F3SSN3']; ?>" /> </td> </tr> <tr> <td>Date of Birth</td> <td> <select name="F3DOB1"> <option value="">Month</option> <?php for ($i=1; $i<=12; $i++) { echo "<option value='$i'"; if ($fields["F3DOB1"] == $i) echo " selected"; echo ">$i</option>"; } ?> </select> / <select name="F3DOB2"> <option value="">Day</option> <?php for ($i=1; $i<=31; $i++) { echo "<option value='$i'"; if ($fields["F3DOB2"] == $i) echo " selected"; echo ">$i</option>"; } ?> </select> / <select name="F3DOB3"> <option value="">Year</option> <?php for ($i=date('Y'); $i>=1900; $i--) { echo "<option value='$i'"; if ($fields["F3DOB3"] == $i) echo " selected"; echo ">$i</option>"; } ?> </select> </td> </tr> <tr> <td>Address: </td> <td><input type="text" name="F3Address" value="<?php echo $fields['F3Address']; ?>" /></td> </tr> <tr> <td>City: </td> <td><input type="text" name="F3City" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F3City']; ?>" /></td> </tr> <tr> <td>State: </td> <td><select name="F3State"><option value="">Choose a State</option><?php showOptionsDrop($states_arr, null, true); ?></select></td> </tr> <tr> <td>Zip Code: </td> <td><input type="text" name="F3Zip" size="6" maxlength="5" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F3Zip']; ?>" /></td> </tr> <tr> <td>Contact Telephone No: </td> <td>( <input type="text" name="F3Phone1" size="3" maxlength="3" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F3Phone1']; ?>" /> ) <input type="text" name="F3Phone2" size="3" maxlength="3" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F3Phone2']; ?>" /> - <input type="text" name="F3Phone3" size="4" maxlength="4" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F3Phone3']; ?>" /> </td> </tr> <tr> <td>Email:</td> <td><input type="text" name="F3Email" value="<?php echo $fields['F3Email']; ?>" /></td> </tr> </table> <?php } ?> <br /> <?php if ($_SESSION['Num_Fighters'] > "3") { ?> <table class="demoTable"> <tr> <td>First Name: </td> <td><input type="text" name="F4FirstName" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F4FirstName']; ?>" /></td> </tr> <tr> <td>Middle Initial: </td> <td><input type="text" name="F4MI" size="2" maxlength="1" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F4MI']; ?>" /></td> </tr> <tr> <td>Last Name: </td> <td><input type="text" name="F4LastName" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F4LastName']; ?>" /></td> </tr> <tr> <td>Federation No: </td> <td><input type="text" name="F4FedNum" maxlength="10" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F4FedNum']; ?>" /></td> </tr> <tr> <td>SSN: </td> <td><input type="text" name="F4SSN1" size="3" maxlength="3" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F4SSN1']; ?>" /> - <input type="text" name="F4SSN2" size="2" maxlength="2" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F4SSN2']; ?>" /> - <input type="text" name="F4SSN3" size="4" maxlength="4" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F4SSN3']; ?>" /> </td> </tr> <tr> <td>Date of Birth</td> <td> <select name="F4DOB1"> <option value="">Month</option> <?php for ($i=1; $i<=12; $i++) { echo "<option value='$i'"; if ($fields["F4DOB1"] == $i) echo " selected"; echo ">$i</option>"; } ?> </select> / <select name="F4DOB2"> <option value="">Day</option> <?php for ($i=1; $i<=31; $i++) { echo "<option value='$i'"; if ($fields["F4DOB2"] == $i) echo " selected"; echo ">$i</option>"; } ?> </select> / <select name="F4DOB3"> <option value="">Year</option> <?php for ($i=date('Y'); $i>=1900; $i--) { echo "<option value='$i'"; if ($fields["F4DOB3"] == $i) echo " selected"; echo ">$i</option>"; } ?> </select> </td> </tr> <tr> <td>Address: </td> <td><input type="text" name="F4Address" value="<?php echo $fields['F4Address']; ?>" /></td> </tr> <tr> <td>City: </td> <td><input type="text" name="F4City" onkeyup="if(!this.value.match(/^([a-z]+\s?)*$/i))this.value=this.value.replace(/[^a-z ]/ig,'').replace(/\s+/g,' ')" value="<?php echo $fields['F4City']; ?>" /></td> </tr> <tr> <td>State: </td> <td><select name="F4State"><option value="">Choose a State</option><?php showOptionsDrop($states_arr, null, true); ?></select></td> </tr> <tr> <td>Zip Code: </td> <td><input type="text" name="F4Zip" size="6" maxlength="5" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F4Zip']; ?>" /></td> </tr> <tr> <td>Contact Telephone No: </td> <td>( <input type="text" name="F4Phone1" size="3" maxlength="3" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F4Phone1']; ?>" /> ) <input type="text" name="F4Phone2" size="3" maxlength="3" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F4Phone2']; ?>" /> - <input type="text" name="F4Phone3" size="4" maxlength="4" onkeyup="this.value=this.value.replace(/[^0-9]/ig, '')" value="<?php echo $fields['F4Phone3']; ?>" /> </td> </tr> <tr> <td>Email:</td> <td><input type="text" name="F4Email" value="<?php echo $fields['F4Email']; ?>" /></td> </tr> </table> <?php } ?> <div align="right"><input class="enrbutton" type="submit" name="submit" value="Continue" /></div> </form> This only goes through 4 athletes and I need it to capture 20. Any ideas? I am forced to keep all 200+ elements in SESSION assuming somebody enrolls 20 athletes.

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• XmlSchemaElement type

  - by user305287

  Hi, I'm generating WSDL of my web service dynamically, but when I set the XmlSchemaType of my elements, the ServiceDescriptor writes the element as an element rather than message, as I need. The code looks like this: XmlSchemaElement schemaElement = new XmlSchemaElement(); XmlSchemaComplexType complexType = new XmlSchemaComplexType(); XmlSchemaSequence sequence = new XmlSchemaSequence(); foreach (XmlSchemaComplexElementParameter param in element.Parameters) { XmlSchemaElement paramElement = new XmlSchemaElement(); paramElement.Name = param.ParameterName; paramElement.SchemaTypeName = new XmlQualifiedName(param.ParameterType, "http://www.w3.org/2001/XMLSchema"); paramElement.MaxOccurs = param.MaxOccurs; paramElement.MinOccurs = param.MinOccurs; sequence.Items.Add(paramElement); } complexType.Particle = sequence; schemaElement.Name = element.MessageName; schemaElement.SchemaType = complexType; Any ideas about this?

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• How do you get XML::Pastor to set xsi:type for programmatically generated elements?

  - by Derrick

  I'm learning how to use Perl as an automation test framework tool for a Java web service and running into trouble generating xml requests from the Pastor generated modules. The problem is that when including a type that extends from the required type for an element, the xsi:type is not included in the generated xml string. Say, for example, I want to generate the following xml request from the modules that XML::Pastor generated from my xsd: <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <PromptAnswersRequest xmlns="http://mycompany.com/api"> <Uri>/some/url</Uri> <User ref="1"/> <PromptAnswers> <PromptAnswer xsi:type="textPromptAnswer" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <Prompt ref="2"/> <Children> <PromptAnswer xsi:type="choicePromptAnswer"> <Prompt ref="1"/> <Choice ref="2"/> </PromptAnswer> </Children> <Value>totally</Value> </PromptAnswer> </PromptAnswers> </PromptAnswersRequest> What I'm getting currently is this: <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <PromptAnswersRequest xmlns="http://mycompany.com/api"> <Uri>/some/url</Uri> <User ref="1"/> <PromptAnswers> <PromptAnswer> <Prompt ref="2"/> <Children> <PromptAnswer> <Prompt ref="1"/> <Choice ref="2"/> </PromptAnswer> </Children> <Value>totally</Value> </PromptAnswer> </PromptAnswers> </PromptAnswersRequest> Here are some relavent snippets from the xsd: <xs:complexType name="request"> <xs:sequence> <xs:element name="Uri" type="xs:anyURI"/> </xs:sequence> </xs:complexType> <xs:complexType name="promptAnswersRequest"> <xs:complexContent> <xs:extension base="api:request"> <xs:sequence> <xs:element name="User" type="api:ref"/> <xs:element name="PromptAnswers" type="api:promptAnswerList"/> </xs:sequence> </xs:extension> </xs:complexContent> </xs:complexType> <xs:complexType name="promptAnswerList"> <xs:sequence> <xs:element name="PromptAnswer" type="api:promptAnswer" minOccurs="0" maxOccurs="unbounded"/> </xs:sequence> </xs:complexType> <xs:complexType name="promptAnswer" abstract="true"> <xs:sequence> <xs:element name="Prompt" type="api:ref"/> <xs:element name="Children" type="api:promptAnswerList" minOccurs="0"/> </xs:sequence> </xs:complexType> <xs:complexType name="textPromptAnswer"> <xs:complexContent> <xs:extension base="promptAnswer"> <xs:sequence> <xs:element name="Value" type="api:nonEmptyString" minOccurs="0"/> </xs:sequence> </xs:extension> </xs:complexContent> </xs:complexType> And here are relavent parts of the script: my $promptAnswerList = new My::API::Type::promptAnswerList; my @promptAnswers; my $promptAnswerList2 = new My::API::Type::promptAnswerList; my @textPromptAnswerChildren; my $textPromptAnswer = new My::API::Type::textPromptAnswer; my $textPromptAnswerRef = new My::API::Type::ref; $textPromptAnswerRef->ref('2'); $textPromptAnswer->Prompt($textPromptAnswerRef); my $choicePromptAnswer = new My::API::Type::choicePromptAnswer; my $choicePromptAnswerPromptRef = new My::API::Type::ref; my $choicePromptAnswerChoiceRef = new My::API::Type::ref; $choicePromptAnswerPromptRef->ref('1'); $choicePromptAnswerChoiceRef->ref('2'); $choicePromptAnswer->Prompt($choicePromptAnswerPromptRef); $choicePromptAnswer->Choice($choicePromptAnswerChoiceRef); push(@textPromptAnswerChildren, $choicePromptAnswer); $promptAnswerList2->PromptAnswer(@textPromptAnswerChildren); $textPromptAnswer->Children($promptAnswerList2); $textPromptAnswer->Value('totally'); push(@promptAnswers, $pulseTextPromptAnswer); push(@promptAnswers, $textPromptAnswer); I haven't seen this addressed anywhere in the documentation for the XML::Pastor modules, so if anyone can point me at a good reference for its use it would be greatly appreciated. Also, I'm only using XML::Pastor because I don't know of any other modules that can do this, so if any of you know of something either easier to use, or more well maintained, please let me know about that too!

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• ChoiceFormat.setChoices confusion about format parameter type and documentation

  - by polygenelubricants

  From the java.text.ChoiceFormat API: setChoices(double[] limits, String[] formats): Set the choices to be used in formatting. Parameters: limits - contains [...] formats - are the formats you want to use for each limit. They can be either Format objects or Strings. When formatting with object Y, if the object is a NumberFormat, then ((NumberFormat) Y).format(X) is called. Otherwise Y.toString() is called. I'm having difficulties understanding the documentation for the formats parameter: how can you possibly pass a Format/NumberFormat object to setChoices if it's declared String[] formats? Note that interestingly, the getters counterpart of setChoices are declared as follows: double[] getLimits() Object[] getFormats() -- not String[]!!! Is this a bug in the API? Should the setter have been declared setChoices(double[], Object[]) instead, or am I not understanding how to use setChoices correctly?

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• How to make negate_unary work with any type?

  - by Chan

  Hi, Following this question: How to negate a predicate function using operator ! in C++? I want to create an operator ! can work with any functor that inherited from unary_function. I tried: template<typename T> inline std::unary_negate<T> operator !( const T& pred ) { return std::not1( pred ); } The compiler complained: Error 5 error C2955: 'std::unary_function' : use of class template requires template argument list c:\program files\microsoft visual studio 10.0\vc\include\xfunctional 223 1 Graphic Error 7 error C2451: conditional expression of type 'std::unary_negate<_Fn1>' is illegal c:\program files\microsoft visual studio 10.0\vc\include\ostream 529 1 Graphic Error 3 error C2146: syntax error : missing ',' before identifier 'argument_type' c:\program files\microsoft visual studio 10.0\vc\include\xfunctional 222 1 Graphic Error 4 error C2065: 'argument_type' : undeclared identifier c:\program files\microsoft visual studio 10.0\vc\include\xfunctional 222 1 Graphic Error 2 error C2039: 'argument_type' : is not a member of 'std::basic_ostream<_Elem,_Traits>::sentry' c:\program files\microsoft visual studio 10.0\vc\include\xfunctional 222 1 Graphic Error 6 error C2039: 'argument_type' : is not a member of 'std::basic_ostream<_Elem,_Traits>::sentry' c:\program files\microsoft visual studio 10.0\vc\include\xfunctional 230 1 Graphic Any idea? Update Follow "templatetypedef" solution, I got new error: Error 3 error C2831: 'operator !' cannot have default parameters c:\visual studio 2010 projects\graphic\graphic\main.cpp 39 1 Graphic Error 2 error C2808: unary 'operator !' has too many formal parameters c:\visual studio 2010 projects\graphic\graphic\main.cpp 39 1 Graphic Error 4 error C2675: unary '!' : 'is_prime' does not define this operator or a conversion to a type acceptable to the predefined operator c:\visual studio 2010 projects\graphic\graphic\main.cpp 52 1 Graphic Update 1 Complete code: #include <iostream> #include <functional> #include <utility> #include <cmath> #include <algorithm> #include <iterator> #include <string> #include <boost/assign.hpp> #include <boost/assign/std/vector.hpp> #include <boost/assign/std/map.hpp> #include <boost/assign/std/set.hpp> #include <boost/assign/std/list.hpp> #include <boost/assign/std/stack.hpp> #include <boost/assign/std/deque.hpp> struct is_prime : std::unary_function<int, bool> { bool operator()( int n ) const { if( n < 2 ) return 0; if( n == 2 || n == 3 ) return 1; if( n % 2 == 0 || n % 3 == 0 ) return 0; int upper_bound = std::sqrt( static_cast<double>( n ) ); for( int pf = 5, step = 2; pf <= upper_bound; ) { if( n % pf == 0 ) return 0; pf += step; step = 6 - step; } return 1; } }; /* template<typename T> inline std::unary_negate<T> operator !( const T& pred, typename T::argument_type* dummy = 0 ) { return std::not1<T>( pred ); } */ inline std::unary_negate<is_prime> operator !( const is_prime& pred ) { return std::not1( pred ); } template<typename T> inline void print_con( const T& con, const std::string& ms = "", const std::string& sep = ", " ) { std::cout << ms << '\n'; std::copy( con.begin(), con.end(), std::ostream_iterator<typename T::value_type>( std::cout, sep.c_str() ) ); std::cout << "\n\n"; } int main() { using namespace boost::assign; std::vector<int> nums; nums += 1, 3, 5, 7, 9; nums.erase( remove_if( nums.begin(), nums.end(), !is_prime() ), nums.end() ); print_con( nums, "After remove all primes" ); } Thanks, Chan Nguyen

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• Java SortedMap to Scala TreeMap

  - by Dave

  I'm having trouble converting a java SortedMap into a scala TreeMap. The SortedMap comes from deserialization and needs to be converted into a scala structure before being used. Some background, for the curious, is that the serialized structure is written through XStream and on desializing I register a converter that says anything that can be assigned to SortedMap[Comparable[_],_] should be given to me. So my convert method gets called and is given an Object that I can safely cast because I know it's of type SortedMap[Comparable[_],_]. That's where it gets interesting. Here's some sample code that might help explain it. // a conversion from comparable to ordering scala> implicit def comparable2ordering[A <: Comparable[A]](x: A): Ordering[A] = new Ordering[A] { | def compare(x: A, y: A) = x.compareTo(y) | } comparable2ordering: [A <: java.lang.Comparable[A]](x: A)Ordering[A] // jm is how I see the map in the converter. Just as an object. I know the key // is of type Comparable[_] scala> val jm : Object = new java.util.TreeMap[Comparable[_], String]() jm: java.lang.Object = {} // It's safe to cast as the converter only gets called for SortedMap[Comparable[_],_] scala> val b = jm.asInstanceOf[java.util.SortedMap[Comparable[_],_]] b: java.util.SortedMap[java.lang.Comparable[_], _] = {} // Now I want to convert this to a tree map scala> collection.immutable.TreeMap() ++ (for(k <- b.keySet) yield { (k, b.get(k)) }) <console>:15: error: diverging implicit expansion for type Ordering[A] starting with method Tuple9 in object Ordering collection.immutable.TreeMap() ++ (for(k <- b.keySet) yield { (k, b.get(k)) })

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• Using Sub-Types And Return Types in Scala to Process a Generic Object Into a Specific One

  - by pr1001

  I think this is about covariance but I'm weak on the topic... I have a generic Event class used for things like database persistance, let's say like this: class Event( subject: Long, verb: String, directobject: Option[Long], indirectobject: Option[Long], timestamp: Long) { def getSubject = subject def getVerb = verb def getDirectObject = directobject def getIndirectObject = indirectobject def getTimestamp = timestamp } However, I have lots of different event verbs and I want to use pattern matching and such with these different event types, so I will create some corresponding case classes: trait EventCC case class Login(user: Long, timestamp: Long) extends EventCC case class Follow( follower: Long, followee: Long, timestamp: Long ) extends EventCC Now, the question is, how can I easily convert generic Events to the specific case classes. This is my first stab at it: def event2CC[T <: EventCC](event: Event): T = event.getVerb match { case "login" => Login(event.getSubject, event.getTimestamp) case "follow" => Follow( event.getSubject, event.getDirectObject.getOrElse(0), event.getTimestamp ) // ... } Unfortunately, this is wrong. <console>:11: error: type mismatch; found : Login required: T case "login" => Login(event.getSubject, event.getTimestamp) ^ <console>:12: error: type mismatch; found : Follow required: T case "follow" => Follow(event.getSubject, event.getDirectObject.getOrElse(0), event.getTimestamp) Could someone with greater type-fu than me explain if, 1) if what I want to do is possible (or reasonable, for that matter), and 2) if so, how to fix event2CC. Thanks!

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