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Endless Range in Ruby 2.6

In Ruby 2.6 you don’t need to specify -1 at the end of a range to get the rest of the elements:

>  [1, 2, 3, 4][1..-1]
=> [2, 3, 4]

# with Ruby 2.6
>  [1, 2, 3, 4][1..]
=> [2, 3, 4]
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