An Index is integer between 0 and n-1

Returns the list of all indexes of an array with length n

The first index of an array

The last element of an array with length n

import StaticArray.Length as Length
import StaticArray.Index as Index


Length.five
    |> last
    |> Index.toInt
    --> 4

Construct an Index by wrapping higher values

import StaticArray.Length as Length


fromModBy (Length.one |> Length.plus2) 3
    --> first --0

Construct an Index by cutting off higher values

import StaticArray.Length as Length exposing (Length)
import StaticArray.Index exposing (OnePlus,Two)


length : Length (OnePlus Two)
length =
    (Length.one |> Length.plus2)


fromLessThen length 3
    --> last length --2

Increases the index by one. You can not increase the last index.

Decreases the index by one. You can not decrease the first index.

Convert to Integer. You can convert it back by using either fromModBy or fromLessThen

Turn a number into an Index and returns Nothing if the number is not in the range.

import StaticArray.Length as Length


fromInt Length.one -1 --> Nothing


fromInt Length.one 0 --> Just (fromLessThen Length.one 0)


fromInt Length.one 1 --> Nothing

Change the range of the index. If the length is smaller then the index, return Nothing.