How to find multiple matches in a string
in [Ruby]
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From: Alex DeCaria on 13 Apr 2010 12:51 I know how to use regular expressions to find the first match of a pattern in a string. But, how do I most easily find multiple matches? For example, if the string is s = 'abcde_abcde_abcde' and I want to find the location of ALL the 'b' characters, how do I do it? If I use m = s.match(/b/) then m.offset(0) => [1,2] but I don't have any information about the second or third occurences of 'b'. --Alex -- Posted via http://www.ruby-forum.com/.
From: Andrea Dallera on 13 Apr 2010 12:55 Hei, s = 'abcde_abcde_abcde' m = s.scan(/b/) p m # ['b','b','b'] HTH -- Andrea Dallera http://github.com/bolthar/freightrain http://usingimho.wordpress.com On Wed, 2010-04-14 at 01:51 +0900, Alex DeCaria wrote: > I know how to use regular expressions to find the first match of a > pattern in a string. But, how do I most easily find multiple matches? > For example, if the string is > > s = 'abcde_abcde_abcde' > > and I want to find the location of ALL the 'b' characters, how do I do > it? If I use > > m = s.match(/b/) > > then m.offset(0) => [1,2] > > but I don't have any information about the second or third occurences of > 'b'. > > --Alex
From: Intransition on 13 Apr 2010 12:58 On Apr 13, 12:51 pm, Alex DeCaria <alex.deca...(a)millersville.edu> wrote: > I know how to use regular expressions to find the first match of a > pattern in a string. But, how do I most easily find multiple matches? > For example, if the string is > > s = 'abcde_abcde_abcde' > > and I want to find the location of ALL the 'b' characters, how do I do > it? Try #scan
From: Robert Klemme on 13 Apr 2010 13:00 On 04/13/2010 06:55 PM, Andrea Dallera wrote: > Hei, > > s = 'abcde_abcde_abcde' > m = s.scan(/b/) > p m # ['b','b','b'] Or even s.scan(/b) {|match| p match} Kind regards robert -- remember.guy do |as, often| as.you_can - without end http://blog.rubybestpractices.com/
From: Alex DeCaria on 13 Apr 2010 13:01
Andrea Dallera wrote: > Hei, > > s = 'abcde_abcde_abcde' > m = s.scan(/b/) > p m # ['b','b','b'] > > HTH > > -- > Andrea Dallera > http://github.com/bolthar/freightrain > http://usingimho.wordpress.com Thanks Andrea. But is there a way to also find the locations (indexes) of the 'b' characters? --Alex -- Posted via http://www.ruby-forum.com/. |