List of Environment Variables to Dictionary with Values - Idiomatic F#

Question

What is the idiomatic way to take a F# list of string like

let myList = ["BUILD_NUMBER"; "GIT_COMMIT"; "GIT_BRANCH"]

and convert that to a Dictionary where the words above are the keys and the corresponding Environment Variable is the value.

Should all that be done in a one-liner or piped expression? I am missing the FP background to know how to go from list to Dictionary. What is the most idiomatic way to do this in F#?

Answer 1

Environment.GetEnvironmentVariable and the dict function should do the work :

let env =
  myList
  |> Seq.map (fun var -> var, Environment.GetEnvironmentVariable var)
  |> dict