[ruby-core:95803] [Ruby master Feature#16146] Array .difference allow custom comparison
From:
jonathan@...
Date:
2019-11-11 20:34:22 UTC
List:
ruby-core #95803
Issue #16146 has been updated by jonathanhefner (Jonathan Hefner). duerst (Martin Dst) wrote: > In my sentence above, 'that' refers to 'an O(n) implementation'. Naive implementations don't have that problem, but they are slow (O(nイ)). But the implementation I posted is O(n). (Note that `rejected` is a Set rather than an Array, so `rejected.include?` should be O(1)). ---------------------------------------- Feature #16146: Array .difference allow custom comparison https://bugs.ruby-lang.org/issues/16146#change-82624 * Author: ngomez (Nancy Gomez) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- Hello! I wanted to know if there's any plan to implement the ability to define comparison between individual items in arrays. Here is where I originally asked the question on Stack Overflow: https://stackoverflow.com/questions/57316775/is-there-any-way-to-specify-how-to-compare-of-array-of-objects-for-difference-f But specifically, I noticed nearly all the existing Array functions allow us to define ways for comparison, such as #uniq but #difference does not :( This is quite unfortunate but I'm hoping it's just because this function was introduced in 2.6.0, and hopefully this feature can be implemented? Thanks for any and all info :) -- https://bugs.ruby-lang.org/ Unsubscribe: <mailto:ruby-core-request@ruby-lang.org?subject=unsubscribe> <http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>