Why do some newer programming languages almost always have the var keyword and write the type after the variable, for example: var x int = 12345 var y: Int = 67890 I know that type inference can be implemented in this way, which can be written as foll...
java8 s Optional doesn t make the program concise, so don t talk about him. Okay, thank you . after looking at the following question, I think this design is very good can null.method () in Java be designed to return null? now the version ...
for example, wouldn t it be better to configure it uniformly in the properties file? ...
there seem to be only six data types in python3 (strings, numbers, lists, dictionaries, tuples, collections), but I recently learned about the chapter on classes. 1 is an "instance " generated by class instantiation a data type? 2 are binary arrays an...