sed - searching token in certain order Post: 302854079

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Top Forums Shell Programming and Scripting sed - searching token in certain order Post 302854079 by jcdole on Monday 16th of September 2013 05:30:59 PM

09-16-2013

Registered User

My last post show what I have tried before I post my question.

And the pseudo code show exactly the problem:
1�) There is one parameter ($1) for the file name : "/root/Documents/file_text.txt" in the example
2�) There is one parameter ($2) for the first token : "In the Linux startup process" in the example
So we can ignore the begin of the text file
3�) There is one parameter ($3) for the second token : "Like init"
So we can search safely from this second token because we are protected by the first token and because we know that the second token appear only once after the first token. So we can ignore all the text until this second token after having found the first token.
4�) There is one parameter ($5) for the last token : "ways" in the example
So we stop searching beyond this token.
As I have no idea how to pass the character " \ " or " } " or " ' " or " . " as token, I have make my test with a single word.
5�) There is one parameter ($4) for the token to search for : "manage" in the example.
This token could start at the very beginning of a line, after a blank or after a tab ( some thing like [ ^ | \t | ]).
As I don't know how to represent this ORed expression, I give my example with a simple word.

As you can see, my pseudo code is unchanged.

What I would like is :
1�) make simpler

Code:

my_function () {
CMD="COUNT=\$(sed -n '/^$1/,\$p'  $2 | sed -n '/^$3/,\$p' | sed '/$5/ q'  | sed -n '1p' | grep -c '$4'   )"
eval $CMD
if [[ $COUNT -gt 0 ]] ; then
    return 0
else
    return 1
fi
}

2�) how to pass a \, a }, a ' as $5
3�) how to pass [^ | \t | space ]token_to_pass as $4

jcdole

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plucene::analysis::porterstemfilter

Plucene::Analysis::PorterStemFilter(3pm)		User Contributed Perl Documentation		  Plucene::Analysis::PorterStemFilter(3pm)

NAME

       Plucene::Analysis::PorterStemFilter - Porter stemming on the token stream

SYNOPSIS

	       # isa Plucene::Analysis:::TokenFilter

	       my $token = $porter_stem_filter->next;

DESCRIPTION

       This class transforms the token stream as per the Porter stemming algorithm.

       Note: the input to the stemming filter must already be in lower case, so you will need to use LowerCaseFilter or LowerCaseTokenizer farther
       down the Tokenizer chain in order for this to work properly!

       The Porter Stemmer implements Porter Algorithm for normalization of English words by stripping their extensions and is used to generalize
       the searches.  For example, the Porter algorithm maps both 'search' and 'searching' (as well as 'searchnessing') to 'search' such that a
       query for 'search' will also match documents that contains the word 'searching'.

       Note that the Porter algorithm is specific to the English language and may give unpredictable results for other languages. Also, make sure
       to use the same analyzer during the indexing and the searching.

       You can find more information on the Porter algorithm at www.tartarus.org/~martin/PorterStemmer.

       A nice online demonstration of the Porter algorithm is available at www.scs.carleton.ca/~dquesnel/java/stuff/PorterApplet.html.

METHODS

   next
	       my $token = $porter_stem_filter->next;

       Returns the next input token, after being stemmed.

perl v5.12.4							    2011-08-14				  Plucene::Analysis::PorterStemFilter(3pm)

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