Method lfun::`==()

Method `==: int(0..1) `==(mixed arg)
Description: Equality test callback.
Note: If this is implemented it might be necessary to implement lfun::__hash too. Otherwise mappings might hold several objects as indices which are duplicates according to this function. Various other functions that use hashing also might not work correctly, e.g. Array.uniq .
Note: It's assumed that this function is side-effect free.
See also: `==() , lfun::__hash