ruby regex: How to extract string from url

Question

not very familiar with rubular, would like to know how to use Ruby regex to extract "postreview-should-be-the-cause" from

"{\"source_url\"=>\"http://testing.com/projects/postreview-should-be-the-cause\"}"

the best I am getting is

check_user = url.split(/\b(\w+)\b/)
=> ["{\"", "source_url", "\"=>\"", "http", "://", "localhost", ":", "3000", "/", "projects", "/", "postreview", "-", "should", "-", "be", "-", "the", "-", "cause", "\"}"]

Still trying various ways. Thanks in advance.

hwnd · Accepted Answer · 2015-01-13 04:47:18Z

1

To extract that substring from the given string, you could use the following to match instead of split.

result = url.match(/\w+(?:-\w+)+/)

Working Demo

answered Jan 13, 2015 at 4:47

hwnd

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2 Comments

chickensmitten Over a year ago

I am new to match, just wondering if this is the right way use match? Model.find_by(puts result)

chickensmitten Over a year ago

I think I got it, but do let me know if "Model.find_by(puts result)" is valid. =)

vks · Accepted Answer · 2015-01-13 04:47:17Z

0

\/(?!.*\/)

Split by this.And get the second component.See demo.

https://regex101.com/r/sH8aR8/48

answered Jan 13, 2015 at 4:47

vks

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Comments

Avinash Raj · Accepted Answer · 2015-01-13 04:56:33Z

0

You could use string.scan instead of string.split

> "{\"source_url\"=>\"http://testing.com/projects/postreview-should-be-the-cause\"}".scan(/(?<=\/)[^\/"]*(?=[^\/]*$)/)[0]
=> "postreview-should-be-the-cause"

edited Jan 13, 2015 at 4:56

answered Jan 13, 2015 at 4:46

Avinash Raj

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2 Comments

chickensmitten Over a year ago

Thanks avinash! wow, didnt know about scan. So far, string.scan gave me this output. check_user = url.scan(/\b(\w+)\b/) => [["source_url"], ["http"], ["localhost"], ["3000"], ["projects"], ["postreview"], ["should"], ["be"], ["the"], ["cause"]], how can I merge them back to "postreview-should-be-the-cause"? cause I need to match this later with another model.

Avinash Raj Over a year ago

print the index 0 and get the string you want.

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