Question

How can I specifically define a new array of a specific type T ?

Strangely, I couldn’t find any helpful information about it..

I want to write something like this:

let arr = new Array()

only that the elements of arr must be of type T.

How can I do it on F# ?

Answer 1

Maybe the Array.init<'T> and Array.create<'T> functions are what you are looking for.

Also consider using a Sequence instead of an array.

A sequence is a logical series of elements all of one type. Sequences are particularly useful when you have a large, ordered collection of data but do not necessarily expect to use all the elements.