filter Dict()

#1

I have a very basic question. When I was looking up how to filter values in Dict(), I came across this documentation


What does p represent, and what do last§ and first§ mean?

#2

p is an argument that is passed to the anonymous function. For example, x->x+2 is an anonymous function that adds 2 to the input value, x.

#3

See the docs on anonymous functions.

(Also, please quote your code instead of screenshots).