Re: Right Associative Matching Example (for Docs)

On Thu, Dec 18, 2008 at 04:15:55AM -0700, Chris Babcock wrote:
> Use right associative matching when working with tabular data and you
> want to match columns near the end of the line. For example, parsing a
> CSV file with /(?i:":*:email:".+?"([[:print:]]+?)".+?\n)/ matches the
> column after :email: while /(?ir:":*:email:".+?"([[:print:]]+?)".+?\n)/
> matches the last column on the line. 

what's the wanted result here? I get:

$ cat /tmp/csv.csv
"1","a","[email protected]","uno","due","tre"
"2","b","[email protected]","uno","due","tre"
"3","c","[email protected]","uno","due","tre"

$ crm '-{isolate (:e:) /[email protected]/
    match (:: :a:) /(?ir:":*:e:".+?"([[:print:]]+?)".+?\n)/
    output /a=:*:a:\n/
  }' < /tmp/csv.csv
a=,

$ crm '-{isolate (:e:) /[email protected]/
    match (:: :a:) /(?i:":*:e:".+?"([[:print:]]+?)".+?\n)/
    output /a=:*:a:\n/
  }' < /tmp/csv.csv 
a=,

not very meaningful to me.


thx
-- 
paolo

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