CSV#flock

flock(*args)

# File tmp/rubies/ruby-3.3.0/lib/csv.rb, line 2269
def flock(*args)
  raise NotImplementedError unless @io.respond_to?(:flock)
  @io.flock(*args)
end

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See also #field_size_limit #force_quotes? #eof? #gets also in 3.2 · 3.1 · 3.0