Efficient conversion from String[] to F# List

Question

I'm coming to F# from a C# background and a little behind on the different lists and collections. I recently ran into a case where I needed to go from a string[] to 'T list. I ended up using list comprehension to do the cast:

let lines = File.ReadAllLines(@"C:\LinesOText.txt") // returns a string array
let listOLines = [for l in lines -> l] // use list comprehension to get the f# list

Is there a more efficient way of doing the conversion?

Answer 1

Use List.ofArray or Array.toList.

Answer 2

this should do it:

let lines = File.ReadAllLines(@"C:\LinesOText.txt") |> List.ofArray

Answer 3

Here's another way to do it:

let listOfLines = [yield! File.ReadAllLines(@"C:\LinesOText.txt")]