Ruby Range

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wang xiao bo
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In Ruby, we can get the range of numbers by using (1..20). Just like an array, a range also supports each and do end.

numbers = (1..20)

numbers.each do |number|
  puts number
end

Checking if Value is in Range

range = (20..40)
puts range.include? 30 // true

A range can be converted into an array using the to_a method.

range =  (1..3)
array = range.to_a

puts array  // [1,2,3]

Range supports both double dots and triple dots.

puts (1..3).to_a  // [1, 2, 3]
puts(1...3).to_a // [1,2]

puts (1..5).include?(5)           // true
puts (1...5).include?(5)          // false

puts (1..4).to_a == (1...5).to_a  // true
puts (1..4) == (1...5)            // false
Ruby