F# collection initializer syntax

Question

What is the collection initializer syntax in F#? In C# you can write something like:

new Dictionary() {
    {\"One\", 1},
    {\"two\", 2}}
         


        

Answer 1

I don't believe F# has an explicit collection initializer syntax. However it's usually very easy to initialize F# collections. For example

let map = [ ("One", 1); ("Two", 2) ] |> Map.ofSeq

Getting to BCL collections is usually a bit more difficult because they don't always have the handy conversion functions. Dictionary works though because you can use the LINQ method

let map = 
  let list = [ ("One", 1); ("Two", 2) ] 
  System.Linq.Enumerable.ToDictionary(list, fst, snd)