I get the following: 
  DB<1> x split /(a|b)+/, '12aba34ba5'
0  12
1  'a'
2  34
3  'a'
4  5

[download]
If I change that to: 
  DB<8> x split /(a|b|c|d|e)+/, '12abc34de5'
0  12
1  'c'
2  34
3  'e'
4  5

[download]
So, it's only capturing the last delimiter. If you do a regex the same way you get the same thing: 
  DB<12> x '12abc34de5' =~ /(a|b|c|d|e)+/g
0  'c'
1  'e'

[download]
Interesting. I'm not sure why. Maybe it has something to do with a list being returned in a scalar context (the last element is captured that way). If you want to capture the whole delimiter you need to put the + inside the parens: 
  DB<16> x split /([abcde]+)/, '12abc34de5'
0  12
1  'abc'
2  34
3  'de'
4  5

[download]
Harley J Pig

In reply to Re: Regexp - groupings by harleypig
in thread Regexp - groupings by Anonymous Monk

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