function-calls

问题 I recently switched from Matlab to Python . While converting one of my lengthy codes, I was surprised to find Python being very slow. I profiled and traced the problem with one function hogging up time. This function is being called from various places in my code (being part of other functions which are recursively called). Profiler suggests that 300 calls are made to this function in both Matlab and Python . In short, following codes summarizes the issue at hand: MATLAB The class containing

问题 I know in php you are able to make a call like: $function_name = \'hello\'; $function_name(); function hello() { echo \'hello\'; } Is this possible in .Net? 回答1: Yes. You can use reflection. Something like this: Type thisType = this.GetType(); MethodInfo theMethod = thisType.GetMethod(TheCommandString); theMethod.Invoke(this, userParameters); 回答2: You can invoke methods of a class instance using reflection, doing a dynamic method invocation: Suppose that you have a method called hello in a

问题 Why don\'t more mainstream statically typed languages support function/method overloading by return type? I can\'t think of any that do. It seems no less useful or reasonable than supporting overload by parameter type. How come it\'s so much less popular? 回答1: Contrary to what others are saying, overloading by return type is possible and is done by some modern languages. The usual objection is that in code like int func(); string func(); int main() { func(); } you can't tell which func() is