From: stowers.joshua@... Date: 2019-12-19T04:52:58+00:00 Subject: [ruby-core:96325] [Ruby master Feature#16039] Array#contains? to check if one array contains another array Issue #16039 has been updated by JustJosh (Joshua Stowers). @sawa - I 100% agree with what you are saying. I did a poor job expressing my concerns. I am nervous that singling out array arguments in the abbreviated form could result in confusion and misuse. This is not a problem for `Range#cover?`, because a range cannot be composed of other ranges. Since `Set#superset?` does not have an abbreviated form, there is less opportunity for misuse. ---------------------------------------- Feature #16039: Array#contains? to check if one array contains another array https://bugs.ruby-lang.org/issues/16039#change-83237 * Author: cha1tanya (Prathamesh Sonpatki) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- I woud like to propose `Array#contains?` which will check if the one array is part of another array. Implementation can be as follows: ``` def contains?(other) (other - self).empty? end ``` Some test cases: ``` [1, 2, 3].contains?([2, 3]) => true [1, 2, 3].contains?([]) => true [1, 2, 3].contains?([1, 2, 3, 4]) => false [].contains?([]) => true [].contains?([1, 2, 3, 4]) => false ``` -- https://bugs.ruby-lang.org/ Unsubscribe: