Best way to extract last segment of URI in Ruby

Given URI strings like:

http://www.somesite.com/abc
http://www.somesite.com/alpha/beta/abc
http://www.somesite.com/alpha/abc

What's the most elegant way in Ruby to grab the abc at the end of these URIs?

I would use a proper URI parser like the one of the URI module to get the path from the URI. Then split it at / and get the last part of it:

require 'uri'

URI(uri).path.split('/').last

saihgala

uri.split('/')[-1]

uri.split('/').last

Try these:

if url =~ /\/(.+?)$/
  last = $1
end

last = File.basename(url)

From the Terminal command line:

ruby -ruri -e "print File.basename(URI.parse('$URI').path)"

from inside your .rb source:

require 'uri'
theURI = 'http://user:pass@example.com/foo/bar/baz/?lala=foo'
uriPathTail = File.basename(URI.parse(theURI).path) # => baz

it works well with whatever legal theURI you had.

If you don't use URI.parse(), any parameter to the url will be wrongly taken as the last segment of the URI.

While all the usages of split suggested in the answers here are legit, in my opinion @matsko's answer is the one with the clearer code to read

last = File.basename(url)

If the value is any orbitary string + URI, then the below solution should work.

First, extract URI from the string:

uri_string = URI.extract("Test 123 http://www.somesite.com/abc")

Above command returns an array

Then extract the last part of the URI using

uri_string[0].split('/').last

prerequisite: require "uri" needs to be added to the ruby script

来源：https://stackoverflow.com/questions/12345602/best-way-to-extract-last-segment-of-uri-in-ruby

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