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extract numbers from string in ruby regex

原文 2014-12-01 08:21:55 6 2 ruby/ regex

I have a string as

Teen Mom 2 (Season 5) | Ep. 7 | These Are The Days | MTV

I need to extract only Season number and Episode number from this. ie. 5 and 7.

Please help.

2 answers

Use string.scan function like below.

> "Teen Mom 2 (Season 5) | Ep. 7 | These Are The Days | MTV".scan(/(?<=Season )\d+|(?<=Ep\. )\d+/)
=> ["5", "7"]

(?<=Season ) Positive look-behind asserts that the match must be preceded by Season string.
\\d+ Match one or more digits.

Here is a method which generates a named match:

txt = "Teen Mom 2 (Season 5) | Ep. 7 | These Are The Days | MTV"
match = /Season (?<season>\d+).*Ep\. (?<ep>\d+)/.match txt

match['season']
# => 5
match['ep']
# => 7

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