You use one or other to refer to one or more things or people in a group, when it does not matter which particular one or ones are thought of or chosen .
somehow or other
by any means that are necessary
something or other
one unspecified thing or an alternative thing
one way or another/one way or the other
You can use one way or another or one way or the other when you want to say that something definitely happens , but without giving any details about how it happens.