What is the purpose of the `self` parameter? Why is it needed? For a language-agnostic consideration of the design decision, see What is the advantage of having this self pointer mandatory explicit? To close debugging questions where OP omitted a self parameter for a method and got a TypeError, use TypeError: method () takes 1 positional argument but 2 were given instead If OP omitted self in the body of the method and got a NameError, consider How can
trustAnchors parameter must be non-empty - Stack Overflow The problem is due to the way that Tomcat deals with the trust store If you happen to have specified your trust store location as the same as your keystore in the Spring Boot configuration, you'll likely get the trustAnchors parameter must be non-empty message when starting the application
What is the String [] args parameter in the main method? The String[] args parameter is an array of Strings passed as parameters when you are running your application through command line in the OS So, imagine you have compiled and packaged a myApp jar Java application
Execute stored procedure with an Output parameter? exec my_stored_procedure 'param1Value', 'param2Value' The final parameter is an output parameter However, I do not know how to test a stored procedure with output parameters How do I run a stored procedure with an output parameter?
Whats the difference between passing by reference vs. passing by value? Preceding a parameter with keyword out creates an output parameter This indicates to the compiler that the argument will be passed into the called method by reference and that the called method will assign a value to the original variable in the caller
Value cannot be null. Parameter name: source - Stack Overflow 5 This exception will be returned if you attempt to count values in a null collection For example the below works when Errors is not null, however if Errors is null then the Value cannot be null Parameter name: source exception occurs