The empty default constructor like Widget() {}; is seen as a user defined default constructor, while Widget() = default; is not. This leads to default initialization in the former case, while value initialization in the latter, in definitions involving the form Widget w = new Widget(), Widget w{} etc.
FOO="${VARIABLE:-default}" # FOO will be assigned 'default' value if VARIABLE not set or null. # The value of VARIABLE remains untouched. To do the same, as well as assign default to VARIABLE:
Default value of MyObject. See default Keyword in Generic Code (C# Programming Guide) (MSDN): In generic classes and methods, one issue that arises is how to assign a default value to a parameterized type T when you do not know the following in advance: Whether T will be a reference type or a value type. If T is a value type, whether it will be a numeric value or a struct. Given a variable t ...
- name: Create default user: name: "default_name" when: my_variable is not defined - name: Create custom user: name: "{{my_variable}}" when: my_variable is defined But as I mentioned, there's a lot of optional variables and this creates a lot of possibilities. Is there something like the code above?
Is it possible to set default values for some struct member? I tried the following but, it'd cause syntax error: typedef struct { int flag = 3; } MyStruct; Errors: $ gcc -o testIt test.c test....
The case statements and the default statement can occur in any order in the switch statement. The default clause is an optional clause that is matched if none of the constants in the case statements can be matched.
As far as i see it the answer is 'default' is optional, saying a switch must always contain a default is like saying every 'if-elseif' must contain a 'else'. If there is a logic to be done by default, then the 'default' statement should be there, but otherwise the code could continue executing without doing anything.
