overloading

问题 I would like to overload a method with the @QueryParam but everytime I try to execute this code it throws: SEVERE: Exception occurred when intialization com.sun.jersey.spi.inject.Errors$ErrorMessagesException My code is: @GET @Path("/test") @Produces("text/plain") public String getText(@QueryParam("PID") String pid) { return pid; } @GET @Path("/test") @Produces("text/plain") public String getText(@QueryParam("PID") String pid, @QueryParam("NAME") String name) { return pid + name; } 回答1: No

问题 I am designing an application using html and javascript. I have a login form with a Login button on it. A textfield accepts a username and then pressing the login button, login action takes place. However, what i want to do now is that while using the virtual keypad in IPhone, clicking the GO button must initiate the Login action too. Please let me know the solution for the same. Thanks. 回答1: Set a delegate object (point to your view controller) for your UITextField and use the method - (BOOL

问题 I have functions in a superclass designed to associate a string with internal functions: class Base { typedef std::function<void(double)> double_v; bool registerInput(std::string const& key, double_v const& input) { functions[key] = input; } void setInput(std::string key, double value) { auto fit = functions.find(key); if (fit == functions.end()) return; fit->second(value); } std::map<std::string, double_v> functions; } The idea being that any subclass I can register functions can call them

问题 Below is a transcript of what I've tried and what happens. I'm looking for how to call a specific overload along with an explanation of why the following does not work. If your answer is "you should use this commandlet instead" or "call it twice" please understand when I don't accept your answer. PS C:\> [System.IO.Path]::Combine("C:\", "foo") C:\foo PS C:\> [System.IO.Path]::Combine("C:\", "foo", "bar") Cannot find an overload for "Combine" and the argument count: "3". At line:1 char:26 +

问题 Is it possible to check whether or not a method has been overridden by a child class in PHP? <!-- language: lang-php --> class foo { protected $url; protected $name; protected $id; var $baz; function __construct($name, $id, $url) { $this->name = $name; $this->id = $id; $this->url = $url; } function createTable($data) { // do default actions } } Child class: class bar extends foo { public $goo; public function createTable($data) { // different code here } } When iterating through an array of

问题 The matcher IsIterableContainingInAnyOrder has two overloads for the static factory method containsInAnyOrder (both have the return type Matcher<java.lang.Iterable<? extends T>> ): containsInAnyOrder(java.util.Collection<Matcher<? super T>> itemMatchers) containsInAnyOrder(Matcher<? super T>... itemMatchers) Now consider the following program: import static org.hamcrest.collection.IsIterableContainingInAnyOrder.containsInAnyOrder; import static org.hamcrest.core.IsEqual.equalTo; import static

问题 I have a base class EventEmitter , which has the on method to bind handlers on specific events: class EventEmitter { on(event: string, handler: Function) { /* add handler internally */ } protected emit(event: string, ...args) { /* call all handlers listening on event */ } } Now I have various subclasses, which can emit different events with different arguments. I'd like to "declare" which events can be emitted by that specific class: class MyClass extends EventEmitter { on(event: 'event1',

问题 We are familiar with overloading based on function parameters. But why can't we have overloading based on non-type template parameters? With such overloading, you don't have to add extra function parameters just for overloading purposes, which may have a negative impact on runtime performance. Alas, the following code does not compile: template <bool> void func() {} template <int> void func() {} int main() { func<0>(); } The error message produced is error: call of overloaded 'func()' is

问题 I'm having some trouble overloading methods in C++. As an example of the problem, I have a class with a number of methods being overloaded, and each method having one parameter with a different data type. My question: is there a particular order in the class these methods should appear in, to make sure the correct method is called depending on its parameters data type? class SomeClass{ public: ... void Method(bool paramater); void Method(std::string paramater); void Method(uint64_t paramater)

问题 To my knowledge, there are two types of overloading, one based on number of arguments, and one based on argument types While overloading based on number of arguments has been covered here, I can't seem to find guidelines on function overloading by argument type. So since type checking with type() seems to be generally frowned upon, how do I do this in a pythonic way? This seems less elegant than I would expect... def overloaded_func(arg): try: do_list_action(arg) except: try: do_dict_action