How to find multiple matches in a string
in [Ruby]
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From: Caleb Clausen on 13 Apr 2010 13:27 On 4/13/10, Alex DeCaria <alex.decaria(a)millersville.edu> wrote: > Andrea Dallera wrote: >> Hei, >> >> s = 'abcde_abcde_abcde' >> m = s.scan(/b/) >> p m # ['b','b','b'] >> >> HTH > > Thanks Andrea. But is there a way to also find the locations (indexes) > of the 'b' characters? I think this works: s = 'abcde_abcde_abcde' i=0 while i=s.index('b',i) do_something_with i end
From: Andrea Dallera on 13 Apr 2010 13:32 Nope, tried it. -- Andrea Dallera http://github.com/bolthar/freightrain http://usingimho.wordpress.com On Wed, 2010-04-14 at 02:27 +0900, Caleb Clausen wrote: > s = 'abcde_abcde_abcde' > i=0 > while i=s.index('b',i) > do_something_with i > end
From: botp on 13 Apr 2010 18:50 On Wed, Apr 14, 2010 at 1:32 AM, Andrea Dallera <andrea(a)andreadallera.com> wrote: > Nope, tried it. > > -- > Andrea Dallera > http://github.com/bolthar/freightrain > http://usingimho.wordpress.com > > > On Wed, 2010-04-14 at 02:27 +0900, Caleb Clausen wrote: >> s = 'abcde_abcde_abcde' >> i=0 >> while i=s.index('b',i) >> do_something_with i >> end > what do you mean it does not work? btw, you can also use stringscan. it's fast. > s=StringScanner.new "this is a test string" => #<StringScanner 0/21 @ "this ..."> > p s.pos while s.scan_until /s/ 4 7 13 16 => nil pls do not top post. kind regards -botp
From: Robert Klemme on 14 Apr 2010 01:42
On 13.04.2010 19:01, Alex DeCaria wrote: > Andrea Dallera wrote: >> Hei, >> >> s = 'abcde_abcde_abcde' >> m = s.scan(/b/) >> p m # ['b','b','b'] > Thanks Andrea. But is there a way to also find the locations (indexes) > of the 'b' characters? irb(main):012:0> s="a "*5 => "a a a a a " irb(main):013:0> s.scan(/a+/) { p $~, $~.offset(0) } #<MatchData "a"> [0, 1] #<MatchData "a"> [2, 3] #<MatchData "a"> [4, 5] #<MatchData "a"> [6, 7] #<MatchData "a"> [8, 9] => "a a a a a " irb(main):014:0> Kind regards robert -- remember.guy do |as, often| as.you_can - without end http://blog.rubybestpractices.com/ |