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...
the last time it was useful to initialize a project, why was it stuck here all the time when you just wanted to initialize a project? Ask the boss to tell ...
1. I initialize the long press event 2Router of the picture in mounted. ...
what if a token is valid for 7 days and the token expires at the moment a user chooses to buy an item and submits an order? ...
if the api provided by a service is service v1 module method resource I want an address https: service.xxx.com module method resource points directly to service v1 module method resource how do I configure it? ...
the following error should be related to the injection of the data source! But why can it be solved by introducing spring-jdbc as a jar package? spring-jdbcjar:(): : Exception encountered during context initialization - cancelling refresh attempt: o...