What is the difference between Do and Map?

Question

What is the difference between do operator and map operator? It seems the same. I'm learning RxSwift.

Please check the marble diagram of do and map.

do : http://reactivex.io/documentation/operators/do.html

map : http://reactivex.io/documentation/operators/map.html

Answer 1

in addition to what SPatel mentioned,

do: will not modify the emitted elements but rather just pass them through and has no effect on the actual subscription.

whereas

map: transforms each value of a sequence before emitting on the actual subscription

check this for reference: https://medium.com/ios-os-x-development/learn-and-master-️-the-basics-of-rxswift-in-10-minutes-818ea6e0a05b

Answer 2

map -> is use to convert one stream into another stream.

do -> is use to perform some action or task on every stream event