method

select!

v2_1_10 - Show latest stable - Class: Set

select!(&block)

public

Equivalent to Set#keep_if, but returns nil if no changes were made.

# File lib/set.rb, line 342
  def select!(&block)
    block or return enum_for(__method__)
    n = size
    keep_if(&block)
    size == n ? nil : self
  end

select!

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