method

select!

v1_9_2_180 - Show latest stable - Class: Set

select!()

public

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

# File lib/set.rb, line 297
  def select!
    block_given? or return enum_for(__method__)
    n = size
    keep_if { |o| yield(o) }
    size == n ? nil : self
  end

select!

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