[nemo1618]

In practice, no one will do this, unless there happens to be a function with the correct signature already available. The lambda syntax is so verbose that it's easier to just write the for loop.

Another problem is that tons of Go functions return (value, error), and it's not clear how such functions should interact with a "map" function. Return all the errors in a separate slice? Stop at the first error? What if you only want to stop when the error is io.EOF? etc.

I think we'll only see map/filter/reduce if the language is changed to specifically accommodate them. I've experimented with doing this myself, which people tend to view as heresy: https://twitter.com/lukechampine/status/1367279449302007809?...

[pjmlp]

Easy, by using monadic operators.

https://naveenkumarmuguda.medium.com/railway-oriented-progra...