[Nae3Au5x]

Some people may depend on them, but the difference between API guarantees and implementation details is that developers are far less reluctant to break your legs... I mean your application if you depend on the latter.

For example in java the iteration order of hash maps or the behavior of sorts in presence of non-reflexive comparators changed and people did depend on that. Sun was able to change it because it was not part of the API contract.

[pure-awesome]

Man, depending on sort order with a non-reflexive comparator is a TERRIBLE idea. Almost on the level of https://xkcd.com/1172/