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Top Forums UNIX for Beginners Questions & Answers Delete lines between two patterns excluding the other lines containing these pattern Post 303044656 by nezabudka on Saturday 29th of February 2020 01:36:38 AM
Old 02-29-2020
I am glad if it was useful, @jiam912
The code has grown a bit, but I could not find another way to get around the buffer size limit
Code:
sed -r ':1;N;/a[^\n]*\n*$/b1;l;s/(^a.*$)\n+(^c.*$)/\1\n\2/m'

The problem was as follows.
If the string starting with 'a' was even line then the code did not work properly.
Add the 'l' command to look at the contents of the buffer (the line marked at the end with a dollar sign)
and add one line to the input file.
Code:
cat file
aaa 409
bbb 201

122 0.98
aaa 1.47
aaa 0.00
aaa 0.00
aaa 1.47

ccc 0.00
121 0.01
135 1.99

Code:
sed -r ':1;N;/\n$/b1;l;s/(^a.*$)\n+(^c.*$)/\1\n\2/m' file
aaa 409\nbbb 201$
aaa 409 
bbb 201 
\n122 0.98$

122 0.98
aaa 1.47\naaa 0.00$
aaa 1.47
aaa 0.00
aaa 0.00\naaa 1.47$
aaa 0.00
aaa 1.47
\nccc 0.00$

ccc 0.00
121 0.01\n135 1.99$
121 0.01
135 1.99

а new version
Code:
sed -r ':1;N;/a[^\n]*\n*$/b1;l;s/(^a.*$)\n+(^c.*$)/\1\n\2/m' file
aaa 409\nbbb 201$
aaa 409 
bbb 201 
\n122 0.98$

122 0.98
aaa 1.47\naaa 0.00\naaa 0.00\naaa 1.47\n\nccc 0.00$
aaa 1.47
aaa 0.00
aaa 0.00
aaa 1.47
ccc 0.00
121 0.01\n135 1.99$
121 0.01
135 1.99


Last edited by nezabudka; 02-29-2020 at 02:52 AM..
 

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SPLFILEOBJECT.FPUTCSV(3)						 1						  SPLFILEOBJECT.FPUTCSV(3)

SplFileObject::fputcsv - Write a field array as a CSV line

SYNOPSIS
public int SplFileObject::fputcsv (array $fields, [string $delimiter = ","], [string $enclosure = '"'], [string $escape = " DESCRIPTION
Writes the $fields array to the file as a CSV line. PARAMETERS
o $fields - An array of values. o $delimiter - The optional $delimiter parameter sets the field delimiter (one character only). o $enclosure - The optional $enclosure parameter sets the field enclosure (one character only). o $escape - The optional $escape parameter sets the escape character (one character only). RETURN VALUES
Returns the length of the written string or FALSE on failure. Returns FALSE, and does not write the CSV line to the file, if the $delimiter or $enclosure parameter is not a single character. ERRORS
/EXCEPTIONS An E_WARNING level error is issued if the $delimiter or $enclosure parameter is not a single character. CHANGELOG
+--------------+-------------------------------+ | Version | | | | | | | Description | | | | +--------------+-------------------------------+ |5.5.21, 5.6.5 | | | | | | | Added the $escape parameter. | | | | +--------------+-------------------------------+ EXAMPLES
Example #1 SplFileObject::fputcsv example <?php $list = array ( array('aaa', 'bbb', 'ccc', 'dddd'), array('123', '456', '789'), array('"aaa"', '"bbb"') ); $file = new SplFileObject('file.csv', 'w'); foreach ($list as $fields) { $file->fputcsv($fields); } ?> The above example will write the following to file.csv: aaa,bbb,ccc,dddd 123,456,789 """aaa""","""bbb""" SEE ALSO
fputcsv(3), SplFileObject::fgetcsv. PHP Documentation Group SPLFILEOBJECT.FPUTCSV(3)
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