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Calling different classes with if else statements


Calling different classes with if else statements

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Calling different classes with if else statements
Tag : java , By : Alex S
Date : December 05 2020, 12:24 PM


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Calling scala abstract classes with parameters and inner classes from Java


Tag : java , By : xie renhui
Date : March 29 2020, 07:55 AM
I wish this helpful for you The generated bytecode for your class will be identical to the Java definition:
abstract class X implements scala.ScalaObject {
  public X(int i) {
    System.out.println(i);
  }

  public abstract void hello(String s);

  //possibly other fields/methods mixed-in from ScalaObject
}

Calling a classes method from same classes property syntax? PHP


Tag : php , By : Ted Leung
Date : March 29 2020, 07:55 AM
I wish did fix the issue. You're not following the syntax from the documentation.
new ($router->controller())->$router->method();

Strategy for calling functions in classes with diamond inheritance and virtual base classes


Tag : cpp , By : Steve Jones
Date : March 29 2020, 07:55 AM
wish of those help Just an implementation of polkadotcadaver's idea. Here, Limiter is designed to be a reusable mechanism for this, and the virtual base class should have a member of that type. The controlled base-class function uses bool Limiter::do_next() to ask whether it should run "as usual" or return immediately, while the derived classes calling the base-class function get a scope-guard object from the limiter that takes ownership if not already claimed, and releases any ownership it had on destruction.
#include <iostream>

class Limiter
{
  public:
    Limiter() : state_(Unlimited) { }

    class Scope
    {
      public:
        Scope(Limiter& l)
          : p_(l.state_ == Unlimited ? &l : NULL)
        { if (p_) p_->state_ = Do_Next; }

        ~Scope() { if (p_) p_->state_ = Unlimited; }
      private:
        Limiter* p_;
    };

    Scope get() { return Scope(*this); }

    bool do_next()
    {
        if (state_ == Do_Next) { state_ = Suspended; return true; }
        return state_ != Suspended;
    }

  private:
    enum State { Unlimited, Do_Next, Suspended } state_;
};

struct A {
    Limiter limiter_;
    virtual void foo() {
        if (limiter_.do_next())
            std::cout << "A" << std::endl;
    }
};
struct B : virtual public A {
    virtual void foo() {
        Limiter::Scope ls = A::limiter_.get();
        A::foo();
        std::cout << "B" << std::endl;
    }
};
struct C : virtual public A {
    virtual void foo() {
        Limiter::Scope ls = A::limiter_.get();
        A::foo();
        std::cout << "C" << std::endl;
    }
};

struct D : public B, public C{
    virtual void foo() {
        Limiter::Scope ls = A::limiter_.get();
        B::foo();
        C::foo();
        std::cout << "D" << std::endl;
    }
};

int main() {
    D d;
    d.foo();
}
#include <iostream>

namespace foo {
    struct A {
        A() { std::cout << "A\n"; }
    };
    struct B : virtual public A {
        B() { std::cout << "B\n"; }
    };
    struct C : virtual public A {
        C() { std::cout << "C\n"; }
    };
    struct D : public B, public C{
        D() { std::cout << "D\n"; }
    };
}

struct A { virtual void foo() { foo::A(); } };
struct B : virtual public A { void foo() { foo::B(); } };
struct C : virtual public A { void foo() { foo::C(); } };
struct D : public B, public C { void foo() { foo::D(); } };

int main() {
    D d;
    d.foo();
}

I have written two separate files, one containing classes and the other calling them but calling one makes object of all


Tag : python , By : kennystone
Date : March 29 2020, 07:55 AM
I hope this helps . When you call from separate import * you execute the print command ! If you want to just make an instance do something like :
class foo():
  def my_print(self):
    print 'a bunch of time consuming work'
f = foo()
f.my_print

most efficient way calling a specific method by key || refactor method calling switch statements


Tag : java , By : Malikul
Date : March 29 2020, 07:55 AM
wish helps you A third option would be to build a map from numbers to Runnables and look up the method to call. I'm not sure how the running time would compare, but I imagine it would be faster than using reflection.
Map<Integer, Runnable> methodMap = new ConcurrentHashMap<>();
methodMap.put(1, () -> doMethod1());
methodMap.put(2, () -> doMethod2());
methodMap.put(3, () -> doMethod3());
// ... and so on ...

// look up the method and run it:
Runnable method = methodMap.get(code);
if (method != null) {
    method.run();
}
methodMap.put(1, new Runnable() { public void run() { doMethod1(); } });
methodMap.put(2, new Runnable() { public void run() { doMethod2(); } });
methodMap.put(3, new Runnable() { public void run() { doMethod3(); } });
// etc.
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