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  • Create Class objects based on type signature

    - by Andreas_D
    Class.forName(boolean.class.getName()); This doesn't work in Java - the virtual machine slaps you with a ClassNotFoundException. I was in need for something like that because I wanted to reflect methods based on Strings that included the method signatures, like public void doSomething(boolean yesWeCan, java.lang.String[] presidents); At the end I came up with a custom 'ClassFactory' which translates the type Strings to class objects. This factory includes a lot of handlers for primitive and array type values. The handler for array type objects is something like: if (isArrayOfObjects) { return Class.forName("L["+typeName.replace("[]", "")+";"); } My question is - have I missed something in the Java 1.5+ API that might do the trick?

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  • pass value to servlet from a hidden input type

    - by kawtousse
    I am trying to pass the parameter called value in the hidden input type to my servlet. It is like that: retour.append("<input type=\"hidden\" id=\"id_" + nomTab + "_" + compteur + "\" value=\"" + object.getIdDailyTimeSheet() + "\"/>"); retour.append("<button id=edit name=edit type=submit onClick= editarow()>"); retour.append("<img src=edit.gif />"); retour.append("</button>"); retour.append("</td>"); But the method get parameter recommend a name to be able to get the value here. So how can I deal with it? Here I want to pass to the servlet the value of object.getIdDailyTimeSheet().

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  • Useless variable name in C struct type definition

    - by user1210233
    I'm implementing a linked list in C. Here's a struct that I made, which represents the linked list: typedef struct llist { struct lnode* head; /* Head pointer either points to a node with data or NULL */ struct lnode* tail; /* Tail pointer either points to a node with data or NULL */ unsigned int size; /* Size of the linked list */ } list; Isn't the "llist" basically useless. When a client uses this library and makes a new linked list, he would have the following declaration: list myList; So typing llist just before the opening brace is practically useless, right? The following code basically does the same job: typedef struct { struct lnode* head; /* Head pointer either points to a node with data or NULL */ struct lnode* tail; /* Tail pointer either points to a node with data or NULL */ unsigned int size; /* Size of the linked list */ } list;

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  • Interpreting type codes in sys.objects in SQL Server

    - by fatcat1111
    On SQL Server, the sys.objects table includes "Type" and "Type_Desc" attributes. For example: SELECT DISTINCT [Type], Type_Desc FROM Sys.Objects ORDER BY [Type] Returns: C CHECK_CONSTRAINT D DEFAULT_CONSTRAINT F FOREIGN_KEY_CONSTRAINT FN SQL_SCALAR_FUNCTION FS CLR_SCALAR_FUNCTION IT INTERNAL_TABLE P SQL_STORED_PROCEDURE PK PRIMARY_KEY_CONSTRAINT S SYSTEM_TABLE SQ SERVICE_QUEUE TR SQL_TRIGGER U USER_TABLE UQ UNIQUE_CONSTRAINT V VIEW Is there a comprehensive list of these types somewhere? There isn't a constraint on sys.objects that points me to table of these, and sys.types contains data types. I've searched SQL BOL but haven't found it. Any help would be appreciated. EDIT: Some DBs use only a subset of these types. For example, if I have a database with no views, when I query Sys.Objects as above, there are no "V" rows in the results. I am looking for a list of all possible types and descriptions used by SQL Server.

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  • How to dispatch a multimethod on the type of an array

    - by Arthur Ulfeldt
    I'm working on a multimethod that needs to update a hash for a bunch of different things in a sequence. Looked fairly straitforward until I tried to enter the 'type of an array of X'. (defmulti update-hash #(class %2)) (type (byte 1)) => java.lang.Byte (defmethod update-hash java.lang.Byte [md byte] (. md update byte)) (type (into-array [ (byte 1)])) => [Ljava.lang.Byte; (defmethod update-hash < WHAT GOES HERE > [md byte]

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  • Money type field returns Dollar, but regional set to UK (Windows 7)

    - by Gareth
    Hi, On a Windows 7 machine with Advantage Data Architect version 9.10.0.11, money type data is returned as Dollars, instead of Pounds. Sometimes, it will suddenly switch to Pounds, without me changing any settings. Everything else returns Pounds correctly (regional settings is UK with £ as the currency symbol). Has anyone else had this problem and/or found a solution? If I run any reports using the money data type field I can't be sure that it's going to be accurate. And no, I can't change the field type and handle the currency symbol myself. Any help would be appreciated.

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  • PHP Casting as Object type in foreach Loop

    - by Coulton
    Within the following code, $quiz_object->personalities contains an array of Personality() objects. // Loop through each personality that exists for the quiz foreach($quiz_object->personalities AS $existing_personality) { // Show all of the existing personalities echo $existing_personality->GetQuizMakerPersonalityHTML(); } How do I "cast" (I think that's the right word) my variable $existing_personality within the foreach loop as the object type? I wish to do this so that when I type $existing_personality->, I get the list of public functions available for that object type. At the moment, Zend doesn't know that it refers to a Personality object within the loop.

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  • Can we change <input type="file"> style?

    - by learner.php
    I tried to change the HTML form, input type file. Here is my code: HTML, form id = form <input class="upload_file" type="file" id="file" name="file" /> .CSS I tried both: .upload_button{ background: url('../images/upload_btn_bg.png') no-repeat; width: 200px; height: 40px; } #form input[type=file]{ background: url('../images/upload_btn_bg.png') no-repeat; width: 200px; height: 40px; } None of both of those methods works. I did see from some website, like facebook, youtube, google or twitter, they have different style. Wonder how they do it.

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  • Delphi 2010 - Why can't I declare an abstract method with a generic type parameter?

    - by James
    I am trying to do the following in Delphi 2010: TDataConverter = class abstract public function Convert<T>(const AData: T): string; virtual; abstract; end; However, I keep getting the following compiler error: E2533 Virtual, dynamic and message methods cannot have type parameters I don't quite understand the reason why I can't do this. I can do this in C# e.g. public abstract class DataConverter { public abstract string Convert<T>(T data); } Anyone know the reasoning behind this?

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  • c# class design - what can I use instead of "static abstract"?

    - by Ryan
    I want to do the following public abstract class MyAbstractClass { public static abstract int MagicId { get; } public static void DoSomeMagic() { // Need to get the MagicId value defined in the concrete implementation } } public class MyConcreteClass : MyAbstractClass { public static override int MagicId { get { return 123; } } } However I can't because you can't have static abstract members. I understand why I can't do this - any recommendations for a design that will achieve much the same result? (For clarity - what I am trying to do is provide a library with an abstract base class but the concrete versions MUST implement a few properties/methods themselves and yes, there are good reasons for keeping it static.)

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  • Avoiding sub-type selection in view code

    - by John Donoghue
    Hi, I have some code where the model contains some classes like (vb.net pseudocode, but could be any OO language): Enum AttributeType Boolean Date String End Enum MustInherit Class Attibute Must Override Function Type As AttributeType End Class Class BooleanAttribute: Attribute Function Type As AttributeType Return AttributeType.Boolean End Function End Class And the view contains some code like: Select Case AttributeType Case Boolean //Display checkbox control Case Date //Display date picker control Case String //Display textbox control End Select I don't really like the code in the view, for the hopefully obvious reasons (what happens when I get a new attribute type etc). My question is, how should I replace it? I could easily add a method to the concrete classes, but that pollutes the model with UI stuff so that's a horrible idea. I could move the select into a factory, but that seems to be just hiding the problem. Can anybody advise a better approach?

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  • delete a row in html table using a hidden type and javascript

    - by kawtousse
    Hi, I have a table with HTML constructed using my servlet class. When trying to delete a row in this table using a javascript function I must first of all put different id to separate elements.and i resolove it with hidden type like that: retour.append("<td>"); retour.append("<input type=\"hidden\" id=\"id_"+nomTab+"_"+compteur+"\" value=\""+object.getIdDailyTimeSheet()+"\"/>"); retour.append("<button id=\"del\" name=\"del\" type=\"button\" onClick=DeleteARow('+id_"+nomTab+"_"+compteur+"')>"); retour.append("<img src=icon_delete.gif />"); retour.append("</button>"); retour.append("</td>"); As you can see each element has a delete button. What i want to know how can i delete one row. thinks.

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  • I have a custom type which i want to serialize, this custom type accepts input which might consists

    - by starz26
    I have a custom type which i want to serialize, this custom type accepts input which might consists of escape chars. M1_Serilizer(MyCustomType customTypeObj) {XmlSerializer serializer = new XmlSerializer(typeof(MyCustomType)); StringWriter sw = new StringWriter(CultureInfo.InvariantCulture); serializer.Serialize(sw, customTypeObj); string str= sw.ToString(); M2_Deserializer(str); } M2_Deserializer(string str) { XmlSerializer serializer = new XmlSerializer(typeof(MyCustomType)); StringReader sr = new StringReader(str); MyCustomType customTypeObj = (MyCustomType)serializer.Deserialize(sr); } when escape type chars are part of the CustomTypeObj, on deserialization it throws an exception. Q1)How do i overcome this?, Q2)I should use StringReader and StringWriter and not memorystream or other thing ways. StringWriter/reader will only serve my internal functionality Q3)How can these escape chars be handled?

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  • In the Enterprise Library, how does the abstract Validator.cs have a method definition?

    - by Soham
    Consider this piece of code: public abstract class Validator { protected Validator() { } protected abstract void ValidateCore(object instance, string value, IList<ValidationResult> results); public void Validate(object instance, string value, IList<ValidationResult> results) { if (null == instance) throw new ArgumentNullException("instance"); if (null == results) throw new ArgumentNullException("results"); ValidateCore(instance, value, results); } } Look at the Validate() overload, how can an abstract class have definitions like this?

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  • FILE Type Not Recognized in MFC

    - by Chicko Bueno
    I'm using FILE type in my MFC project but after compiled, it shows the following errors: Error 23 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int Error 24 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int Error 22 error C2146: syntax error : missing ';' before identifier 'm_pFileW' Those errors are referring to this code: FILE *m_pFileW; Did I missing any library header to use FILE syntax? Do I need to use different approach and replace FILE syntax? This errors are only generated when I placed it into my MFC project. This is not happening in C++ Console. Please help. Thank you.

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  • Get Network type

    - by Moshik
    hello, ive been trying to retrive the current network type, but no success when i say network type: i refer to know this info: if the type is: NETWORK_TYPE_IDEN or NETWORK_TYPE_UMTS.. and so on.. i tried to use: NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo(); or NetworkInfo mobNetInfo = connectivityManager.getNetworkInfo (ConnectivityManager.TYPE_MOBILE); but no success.. i am doing this coz i wanna know if the current network is IDEN, or if the current network is connected through wifi.. any other suggestions will be welcome, thanks!

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  • Get result type of function

    - by Robert
    I want to specialize a template function declared as: template<typename Type> Type read(std::istream& is); I then have a lot of static implementations static int read_integer(std::istream& is); a.s.o. Now I'd like to do a macro so that specialization of read is as simple as: SPECIALIZE_READ(read_integer) So I figured I'd go the boost::function_traits way and declare SPECIALIZE_READ as: #define SPECIALIZE_READ(read_function) \ template<> boost::function_traits<read_function>::result_type read(std::istream& is) { \ return read_function(is); \ } but VC++ (2008) compiler complains with: 'boost::function_traits' : 'read_integer' is not a valid template type argument for parameter 'Function' Ideas ?

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  • Cannot convert []string to []interface {}

    - by karlrh
    I'm writing some code, and I need it to catch the arguments and pass them through fmt.Println (I want its default behaviour, to write arguments separated by spaces and followed by a newline). However it takes []interface {} but flag.Args() returns a []string. Here's the code example package main import ( "fmt" "flag" ) func main() { flag.Parse() fmt.Println(flag.Args()...) } This returns the following error: ./example.go:10: cannot use args (type []string) as type []interface {} in function argument Is this a bug? Shouldn't fmt.Println take any array? By the way, I've also tried to do this: var args = []interface{}(flag.Args()) but I get the following error: cannot convert flag.Args() (type []string) to type []interface {} Is there a "Go" way to workaround this?

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