How to create this array in Ruby?

Question

I there a smarter way to define an array like this in Ruby?

array = [5, 15, 25, 35, 45, 55, 65, 75]

Thanks for any help.

Answer 1

5.step(75, 10).to_a #=> [5, 15, 25, 35, 45, 55, 65, 75]

Answer 2

Use Range#step :

Range.new(5, 75).step(10).to_a
# => [5, 15, 25, 35, 45, 55, 65, 75]

[*Range.new(5, 75).step(10)]
# => [5, 15, 25, 35, 45, 55, 65, 75]

[*(5..75).step(10)]  # (5..75) == Range.new(5, 75)
# => [5, 15, 25, 35, 45, 55, 65, 75]

Answer 3

Not sure if it is nicer, but one way would be:

a = 8.times.map {|i| i*10+5} #=> [5, 15, 25, 35, 45, 55, 65, 75]

The benefit of this method, is that the amount of items in the result ( 8 ) is explicit.

Answer 4

Here is one way :

>> Array.new(8) { |i| i*10 + 5 }
=> [5, 15, 25, 35, 45, 55, 65, 75]
>>