Bug #21174: Range#max called with an argument on a beginless Integer Range raises RangeError

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: 3.4.2
• Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN

[andrykonchin (Andrew Konchin)]

It seems surprising but instead of returning last n Integers Range#max(n) raises RangeError:

(nil..10).max(2)
# => (irb):3:in 'Range#max': cannot get the maximum of beginless range with custom comparison method (RangeError)

I would expect [9, 10] to be returned.

[nobu (Nobuyoshi Nakada)]

andrykonchin (Andrew Konchin) wrote:

I would expect [9, 10] to be returned.

Range#max returns the elements in greater order.
I think it should be [10, 9], and (..10).last(2) should return [9, 10] without an exception too.

https://github.com/ruby/ruby/pull/12879

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset git|cbe3156f82ee8b68e734be58badb9b6a3adc8aa6.

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[Bug #21174] [Bug #21175] Fix Range#max on beginless integer range