20/08/30 09:40:37.84 rD3R6mry.net
>>401 Ruby
(0..3).each{|n| p (1..n).reduce([]){|s, a| s + [a] * a}}
# =>
[]
[1]
[1, 2, 2]
[1, 2, 2, 3, 3, 3]
>>403 Ruby
p 'abc:def:ghi'.scan(/[^:]+/) # => ["abc", "def", "ghi"]
20/08/30 09:40:37.84 rD3R6mry.net
>>401 Ruby
(0..3).each{|n| p (1..n).reduce([]){|s, a| s + [a] * a}}
# =>
[]
[1]
[1, 2, 2]
[1, 2, 2, 3, 3, 3]
>>403 Ruby
p 'abc:def:ghi'.scan(/[^:]+/) # => ["abc", "def", "ghi"]