RegEx - Get All Characters After Last Slash in URL

Question

I\'m working with a Google API that returns IDs in the below format, which I\'ve saved as a string. How can I write a Regular Expression in javascript to trim the string to

Answer 1

Don't write a regex! This is trivial to do with string functions instead:

var final = id.substr(id.lastIndexOf('/') + 1);

It's even easier if you know that the final part will always be 16 characters:

var final = id.substr(-16);

Answer 2

this regexp: [^\/]+$ - works like a champ:

var id = ".../base/nabb80191e23b7d9"

result = id.match(/[^\/]+$/)[0];

// results -> "nabb80191e23b7d9"

Answer 3

Just in case someone else comes across this thread and is looking for a simple JS solution:

id.split('/').pop(-1)

Answer 4

A slightly different regex approach:

var afterSlashChars = id.match(/\/([^\/]+)\/?$/)[1];

Breaking down this regex:

\/ match a slash
(  start of a captured group within the match
[^\/] match a non-slash character
+ match one of more of the non-slash characters
)  end of the captured group
\/? allow one optional / at the end of the string
$  match to the end of the string

The [1] then retrieves the first captured group within the match

Working snippet:

var id = 'http://www.google.com/m8/feeds/contacts/myemail%40gmail.com/base/nabb80191e23b7d9';

var afterSlashChars = id.match(/\/([^\/]+)\/?$/)[1];

// display result
document.write(afterSlashChars);

Answer 5

Don't know JS, using others examples (and a guess) -

id = id.match(/[^\/]*$/); // [0] optional ?

Answer 6

Why not use replace?

"http://google.com/aaa".replace(/(.*\/)*/,"")

yields "aaa"