infinite_beginless_ranges

🚀 Endless and Beginless Ranges

Ruby 2.6+ introduced endless (..) and beginless (..x) ranges, which are perfect for slicing and open‑ended queries without manually calculating indices. Use them to grab the tail of an array or substring of a string effortlessly.

arr = [1, 2, 3, 4, 5]
p p arr[2..]      # => [3, 4, 5]        (from index 2 to end)
p p arr[..2]      # => [1, 2, 3]        (from start through index 2)

str = "abcdef"
p p str[..2]      # => "abc"

# You can even define truly endless ranges
range = (10..)
p p range.first(3) # => [10, 11, 12]