Is there a postgresql SQL equivalent of Python's map function

Question

How to apply a function with arguments on every element in a text array in Postgresql SQL queries

Lets say My text array is

["abc-123-x", "def-123-y", "hij-234-k", "klm-232-p", "nop-3434-9", "qrs-23-p9"]

the result should be

[x,y,k,p,9,p9]

Answer 1

you need to unnest the array, extract the characters, then aggregate back:

select array_agg(right(t.w, 1))
from unnest(array['abc','def','hij','klm','nop','qrs']) as t(w);