which of

also

,

run

,

let

,

apply

etc should I use: 1. the extension must be lambda that takes one parameter (like let), can't be

this

2. it automatically returns the input just like

apply

does

There is

.let

but

.let

returns R and not T

@poohbar Why do you need

block

to return

R

type if you doesn't use it?