Ranges

Ranges are natural, Sunday to Saturday, January to December, 0 to 9, a to f.

myRange = 100..999
0...myArray.length
'a'..'z'

p (-2 .. 2).to_a
p ('Bow' ... 'Boz').to_a
p %w(Sun Mon Tue Wed Thu Fri Sat)[3..5].join(', ')

[-2, -1, 0, 1, 2]
["Bow", "Box", "Boy"]
"Wed, Thu, Fri"

Ranges may be used as intervals:

(2 .. 4).include?(3.1415926) ('perl' .. 'poni') === 'ruby'

true false

Next

Ruby for Perl programmers

Prev