如何将 select 一个适合数组的字符串转换为 Ruby 中的字符串？

Question

I am trying to select a specific item that has a word 'Test' in it from an array using Ruby. The output will then be converted to a string. Can someone tell me what have I missed?

Script

a = ['bTest', 'val', 'Ten']
a.select{ |o| o.include? 'Test' }.to_s

Output

["bTest"]

My expected output

'bTest'

Thank you.

Answer 1

.select will select all items from an array for which the block is true. If you only want to select one item, then use .detect or .find (which are aliases):

a = ['bTest', 'val', 'Ten']
a.detect { |o| o.include? 'Test' }.to_s
# => "bTest"

Answer 2

If you just want to display the result:

a = ['bTest', 'val', 'Ten']
puts a.select{|o| o.include? 'Test' }