End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
instance method
IPAddr#<<
<<(num)
lib/ipaddr.rb
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# File tmp/rubies/ruby-3.2.0/lib/ipaddr.rb, line 140
def <<(num)
return self.clone.set(addr_mask(@addr << num))
end
Returns a new ipaddr built by bitwise left shift.