Question

I have a Set of elements from which I want to take and remove the first few elements a bunch of times. Is there a shorter way (so one operation instead of two) to do that than this:

require 'set'
s = Set[1, 2, 3, 4]       # => #<Set: {1, 2, 3, 4}> 

first_two = s.take(2)     # => [1, 2]
s.subtract(first_two)     # => #<Set: {3, 4}>

(So basically I’m wondering whether I’m overlooking a shift for Sets)

Answer 1

There is no shorter way using builtin methods.

There is an open feature request for a method to return and remove one element; you may want to help refine the API?