I have an array:
arr2 = [6, '(7,0)', '(15,0)', '(5,0)', 3, '(15,2)', 17]
I want to parse each element of the array and get the value as follows:
arr2 = [6, 0, 0, 0, 3, 2, 17]
means if the array element is like (15,2) then only the second element i.e 2 should get printed in the response, and if the array element is not in the format like (7,0) then it should be printed as it is.
arr = [6, '(7,0)', '(15,0)', '(5,0)', 3, '(15,2)', 17]
arr.map do |obj|
case obj
when Integer
obj
else
obj[/(?<=,)\d+/].to_i
end
end
#=> [6, 0, 0, 0, 3, 2, 17]
[6, [7,0], [15,0], [5,0], 3, [15,2], 17].map { |e| [*e].last }
#⇒ [6, 0, 0, 0, 3, 2, 17]
If the elements are strings:
%w[6, (7,0), (15,0), (5,0), 3, (15,2), 17].map { |e| e[/\d+(?=\)|,?\z)/] }
#⇒ ["6", "0", "0", "0", "3", "2", "17"]
map(&:to_i) the latter to get an array of integers.
Finally, for the up-to-date version:
[6, '(7,0)', '(15,0)', '(5,0)', 3, '(15,2)', 17].
map { |e| e.to_s[/\d+(?=\)|,?\z)/] }.
map(&:to_i)
#⇒ [6, 0, 0, 0, 3, 2, 17]
Exotics:
[6, '(7,0)', '(15,0)', '(5,0)', 3, '(15,2)', 17].
inspect.
scan(/\d+(?:,\d+)?/).
map { |e| e.split(',').last.to_i }
#⇒ [6, 0, 0, 0, 3, 2, 17]
%w syntax does not require commas, just write %w[6 (7,0) ...%w syntax does not require commas”—good to know, thank you.This seems fine to me:
arr2.map{|x| x.to_s.scan(/\d+/).last.to_i }
And if you want something without regexp:
arr2.map do |item|
item.is_a?(Integer) ? item : item[1+item.rindex(',')..-2].to_i
end
arr2is an invalid structure in Ruby.[6, (7,0), (15,0), (5,0), 3, (15,2), 17]is not a valid ruby object and you again come with it. Downvoted and voted to close.