Range

In many cases is convenient to have an interval of integers. TO2 has two convenient shorthands for this:

• min..max a range of integers from min to max exclusive

  • E.g. 3..6 would be the numbers [3, 4, 5]

• min...max a range of integers from min to max inclusive

  • E.g. 3...6 would be the numbers [3, 4, 5, 6]

Most commonly this is used in for loops:

let k = 0

for(i in 0..10) {
    k = k + 1
}

Properties

A range has a length property. Therefor

(3..6).length

will be 3

Methods

A range has a map(converter) function that can be used to convert to into an array, whereas converter is a generic function that converts an int into something else:

(0..4).map(fn(i) -> i * 2)

will be the array [0, 2, 4, 6].

(0..4).map(fn(i) -> i.to_string())

will be the array ["0", "1", "2", "3"].