From: Hai anh Le <lhanh@...>
Date: 2008-12-04T11:34:41+09:00
Subject: reg exp

I have a problem with regexp. I have some document like :

A method for detecting a post-translationally modified protein with a
glycosyl group comprising contacting the protein with a glycosyl
transferase enzyme and a labeling agent, wherein the labeling agent
comprises a chemical handle and a transferable glycosyl group.

I want to divide it to some string follow a rule that string start with
"a, an, the" like :

"A method for detecting "
"a post-translationally modified protein with "
"a glycosyl group comprising contacting "
"the protein with "
"a glycosyl transferase enzyme and "
"a labeling agent, wherein "
"the labeling agent comprises "
"a chemical handle and "
"a transferable glycosyl group."


I use the code

while element.size do
    if element =~ /([Aa]|[Aa]n|[Tt]he)( [^ ]+)(?:[Aa]|[Aa]n|[Tt]he)?/
then
      temp_string = $1 +$2
      temp_array << temp_string
    else
      break
    end
    element.slice!(temp_string)
end


but it's not ok. the result is

    A method
    a post-translationally
    a glycosyl
    the protein
    a glycosyl
    a labeling
    the labeling
    a chemical
    a transferable

Can anyone help me about the code ?

Hai Anh
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