Sorting range values

Question

I want to sort an array of strings representing numerical ranges like the following:

b = ["0-5", "100-250", "5-25", "50-100", "250-500", "25-50"]

Using the sort method I get:

b.sort 
# => ["0-5", "100-250", "25-50", "250-500", "5-25", "50-100"]

I want it like this instead:

["0-5, "5-25", "25-50", "50-100", "100-250", "250-500"]

Have you tried converting those strings to actual ranges and sort those? — Severin
– Severin, Commented Apr 8, 2014 at 11:31

Uri Agassi · Accepted Answer · 2014-04-08 11:33:42Z

15

Try:

b.sort_by { |r| r.split('-').map(&:to_i) }
# => ["0-5", "5-25", "25-50", "50-100", "100-250", "250-500"]

This solution takes each item ("0-5") splits it to two items (["0", "5"]), and converts them to integers ([0, 5]). Now sort sorts by the array (first item first, and the second as a tie-breaker).

answered Apr 8, 2014 at 11:33

Uri Agassi

37.5k16 gold badges82 silver badges96 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Chezhian · Accepted Answer · 2014-04-08 12:27:43Z

5

b.sort_by { |a| a.split('-').first.to_i }

=> ["0-5", "5-25", "25-50", "50-100", "100-250", "250-500"]

answered Apr 8, 2014 at 12:27

Chezhian

7739 silver badges15 bronze badges

Comments

Cary Swoveland · Accepted Answer · 2014-04-08 21:24:16Z

5

b.sort_by(&:to_i)
  #=> ["0-5", "5-25", "25-50", "50-100", "100-250", "250-500"]

because

"25-50".to_i #=> 25

answered Apr 8, 2014 at 21:24

Cary Swoveland

111k6 gold badges69 silver badges105 bronze badges

Collectives™ on Stack Overflow

Sorting range values

3 Answers 3

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related