Convert ruby array to string - ruby

Question

I'm fairly new to ruby. I have the following csv:
Office (1), Test
Office (Test)(2), Test
In "data.csv".
Then in my ruby script I have;
CSV.foreach("data.csv") do |line|
registeredOffice = line[0].to_s()
macOffice = registeredOffice.scan(/\(([^\)]+)\)/).last
csvText = "#{csvText}\n#{macOffice}"
end
Which gives me
["1"]
["2"]
However I want to know how to convert the above to a string so the output is
1
2
Using .join or [0] returns a nil:NilClass (NoMethodError)

Answer 1

You probably want something like:
macOffice = registeredOffice[/(\d+)\)$/, 1]
scan with capture groups will give you multi-d arrays

Answer 2

The following line:
macOffice = registeredOffice.scan(/\(([^\)]+)\)/).last
returns array since scan returns array of array. For the first line of data.csv, it is ["1"].
I guess you need scalar value for macOffice, thus, you want to use match which only returns non-repetive match using match, which returns array of matches once. For example, you can grab first match from the returned array using [1] subscript, thus:
macOffice = registeredOffice.match(/\(([^\)]+)\)/)[1]
which returns 1.
Assuming you want an array you can write like this:
out = []
CSV.foreach("data.csv") do |line|
registeredOffice = line[0].to_s()
macOffice = registeredOffice.match(/\((\d+)\)/)[1]
out.push(macOffice)
end
puts out.join(",")
to produce 1,2