Get Number of regex matches

[Ingo Weiss]

Hi,

how can I get the NUMBER of matches for a regular expression in a given
string?

For example: for string 'Banana' and regex /a/ I should get '3'
(matches)

Thanks!
Ingo

 

[Max Muermann]

Hi,

how can I get the NUMBER of matches for a regular expression in a given
string?

For example: for string 'Banana' and regex /a/ I should get '3'
(matches)

Here's one way (but there are probably better ones):

"Banana".scan(/a/).size
=> 3

max

 

[Wilson Bilkovich]

Hi,

how can I get the NUMBER of matches for a regular expression in a given
string?

For example: for string 'Banana' and regex /a/ I should get '3'
(matches)

One way is:
'Banana'.scan(/a/).size

I'm not sure how to get it out of the MatchData returned by 'match' or
=~, unfortunately.

 

[Martin DeMello]

Here's one way (but there are probably better ones):

"Banana".scan(/a/).size
=> 3

This one skips the intermediate array construction in return for some
clunkiness:

i = 0
banana.scan(/a/) { i += 1}
i

martin

 

[Robert Klemme]

This one skips the intermediate array construction in return for some
clunkiness:

i = 0
banana.scan(/a/) { i += 1}
i

=> 3



robert

 

[Ingo Weiss]

Thank you very much for all your great suggestions!

Ingo