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Range

bounds

Returns the first and last values of a range.

(1..9).bounds #=> [1, 9]

combine

Returns two concatenated ranges.

(1..3).combine(7..9) #=> [1, 2, 3, 7, 8, 9]

include_with_range?

Returns if a range is within another open ended range.

(1..5).include_with_range?(1)    # => true
(1..5).include_with_range?(2..3) # => true
(1..5).include_with_range?(7)    # => false
(1..5).include_with_range?(2..6) # => false

overlaps?

Returns if two ranges overlap each other.

(1..5).overlaps?(4..6) # => true
(1..5).overlaps?(7..9) # => false

sample

Returns a random element from the range.

(1..5).sample # => 4

shuffle(!)

Returns a copy of a shuffled range of elements.

(1..5).shuffle  # => [2, 5, 1, 4, 3]
(1..5).shuffle! # => [3, 4, 5, 2, 1]

within?

Returns if one range is within another.

(1..5).within?(2..4) # => true
(1..5).within?(4..6) # => false