I have
file_ext = attach.document_file_name.capture(/\.[^.]*$/)
but i guess there is no method capture.
I'm trying to get the file extension from a string. I don't yet have the file.
views:
37answers:
3
+1
A:
You can do RegEx match in ruby like so:
file_ext = (/\.[^.]*$/.match(attach.document_file_name.to_s)).to_s
Fore more information please check http://ruby-doc.org/core/classes/Regexp.html
GeekTantra
2010-07-20 17:47:00
This also should work. Nice trick. +1 from me.
GeekTantra
2010-07-20 17:49:30
Note that it returns `nil` if no extension is found. If you prefer an empty string, append a to_s at the end of line.
giraff
2010-07-21 18:14:04
+5
A:
There is also the built-in ruby function File.extname:
file_ext = File.extname attach.document_file_name
(with the difference that File.extname('hello.') returns '', whereas your regex would return '.')
giraff
2010-07-20 17:55:10
+1 Why mess with regular expressions when there is a function that does exactly what you want
bta
2010-07-20 18:03:49