Question

can you suggest me the shortest and easiest way for extracting substring from string sequence? I’m getting this collection from using enlive framework, which takes content from certain web page, and here is what I am getting as result:

("background-image:url('http://s3.mangareader.net/cover/gantz/gantz-r0.jpg')"
 "background-image:url('http://s3.mangareader.net/cover/deadman-wonderland/deadman-wonderland-r0.jpg')"
 "background-image:url('http://s3.mangareader.net/cover/12-prince/12-prince-r1.jpg')" )

What I would like is to get some help in extracting the URL from the each string in the sequence.i tried something with partition function, but with no success. Can anyone propose a regex, or any other approach for this problem?

Thanks

Answer 1

re-seq to the resque!

(map #(re-seq #"http.*jpg" %) d)
(("http://s3.mangareader.net/cover/gantz/gantz-r0.jpg")  
("http://s3.mangareader.net/cover/deadman-wonderland/deadman-wonderland-r0.jpg") 
("http://s3.mangareader.net/cover/12-prince/12-prince-r1.jpg"))
user> 

re-find is even better:

user> (map #(re-find #"http.*jpg" %) d)
("http://s3.mangareader.net/cover/gantz/gantz-r0.jpg" 
 "http://s3.mangareader.net/cover/deadman-wonderland/deadman-wonderland-r0.jpg" 
 "http://s3.mangareader.net/cover/12-prince/12-prince-r1.jpg")

because it doesn’t add an extra layer of seq.