3

I always get confused about how to use the verb "to map" in the context of associating objects with each other, particularly if the mapping is directional.

Is there a distinction between

mapping users to IDs

and

mapping IDs to users

In the given example, which would be the better way to put it?

13

A map from X to Y would be something (function, table, data-structure) which, given an X (from an X), would allow you to retrieve the (often, but not necessarily, unique) corresponding Y (to a Y).

Something that maps IDs to users would allow you to retrieve a user given his/here ID. A map from users to IDs would be the opposite. A bi-directional mapping would allow you to do the search both ways.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.