Qian Xu wrote:
Hi All,
I want to test, if two objects are equal.
The rules are as follows:
1. When both are null, it should return true.
2. When one of them is null, it should return false.
3. When both not null, then compare their values (as two strings)
((a is b) || (a && a == b))
Note that if a and b are both the same non-null object, opEquals will
not be called; it'll just evaluate to true.
It's not very nice-looking, but it's the best you can do.
Of course, you could put it into a function:
-----
bool equals(T)(T a, T b) {
return ((a is b) || (a && a == b));
}
-----
Note that this may behave strangely for empty arrays:
-----
char[] str;
equals(str, ""); // returns false
-----
But of course, that's what you asked for. 'str' is null and "" isn't...
