From: transfire@... Date: 2016-10-11T18:15:03+00:00 Subject: [ruby-core:77589] [Ruby trunk Feature#12775] Random subset of array Issue #12775 has been updated by Thomas Sawyer. This definition of `#sample` seems a bit limited. I know it aligns with the statical definition but it is very easy do another way: `shuffle.take(n)`. Also, the interface is a little odd because it can return an element or an Array. Maybe it would be better if it could return repeats. [1,2,3,4].sample(10) => [1,2,4,3,3,4,2,1,2,3] Then #sample could also take a block and return an enumerator when given no argument. To get one element it would be `sample.first`. But if backward compatibility needs to be preserved, then add this functionality by another name. P.S. It would be weird but #sample could use negative numbers to allow repeating. ---------------------------------------- Feature #12775: Random subset of array https://bugs.ruby-lang.org/issues/12775#change-60859 * Author: Tsuyoshi Sawada * Status: Feedback * Priority: Normal * Assignee: ---------------------------------------- I often see use cases to randomly sample a subset from an array like this: ```ruby a = [3, 2, 6, 2, 6, 1] a.sample(rand(a.length + 1)) # => [2, 6, 6, 3] ``` I request extending `Array#sample` to let it take an option (such as `:arbitrary`) for doing that: ```ruby a.sample(:arbitrary) # => [2, 6, 6, 3] ``` or perhaps having an independent method (like `samples`) to do it. ```ruby a.samples # => [2, 6, 6, 3] ``` -- https://bugs.ruby-lang.org/ Unsubscribe: