[ad_1] Yes. Yes it is valid. Every instance of the Foo class will have a field called b1 which has a new Bar instance. 1 [ad_2] solved Object instantiation and assignment in a class [closed]
[ad_1] Just make ctor private/protected and provide a static method(s) to create an instance: class HeapOnly { HeapOnly(); HeapOnly( int i ); public: static HeapOnly *create() { return new HeapOnly; } static HeapOnly *create( int i ) { return new HeapOnly( i ); } }; You may consider to return a std::unique_ptr in general case, … Read more
[ad_1] Start from this simple skeleton: class Matrix: def __init__(self, matrix): self.matrix = matrix def double_diagnonal_entries(self): # do calcs return self.matrix Note, that if you need to implement some basic matrix ops like addition you might consider operator overloading such as: def __add__(self, another_matrix): # do the math return sum_matrix [ad_2] solved Create a class … Read more
[ad_1] I was right about the import.. When i was trying to do: User.UserPK userpk = new User.UserPK(); It was failing because i had an import like this one: org.company.User.UserPK; What I did to solve it it’s let the import like this: org.company.User; It allowed me to instantiate the class as an inner one. Thanks … Read more