There have been some bugs and crashes related to unwanted deep comparison (e.g. in the maze scenario). Scripters very rarely need deep comparison, so it should not be the default for the most commonly used operator.
This also changes behaviour of GetIndexOf to do pointer comparison.
This change has Guenther's seal of approval.
These operators have a stricter definition of equality than the == and !=
operators. Those are already stricter than in some other languages, so the
new ones are probably not needed very often. But if the need does arise,
there's no workaround short of modifying the data structures and checking
whether they are still the same.
This short-circuiting operator will evaluate to its first operand if the operand
is not nil, or to its second operand otherwise. Its intended use is to simplify
defaulting expressions that may evaluate to nil to a valid value.
Günther Brammer