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Top Forums Shell Programming and Scripting Ommit the numbers or any characters only at 8th columns after the dot (.). Post 302997124 by drl on Monday 8th of May 2017 10:09:17 AM
Old 05-08-2017
Hi.

Code:
\d   a numeric character
\s   a space (actually any whitespace)
[p]  a literal "p", in this case period, fullstop (usually "." is a meta-character matching anything), [+] matches a plus sign, 
      (usually + is one or more of the previous)
?    a quantifier, either 0 or 1 of the previous item
()   capturing parens, to variable $1

See perldoc perlre for more details ... cheers, drl
Code:
NAME
    perlre - Perl regular expressions

DESCRIPTION
    This page describes the syntax of regular expressions in Perl.

    If you haven't used regular expressions before, a quick-start introduction
    is available in perlrequick, and a longer tutorial introduction is
    available in perlretut.

...

 

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COLUMN(1)						    BSD General Commands Manual 						 COLUMN(1)

NAME
column -- columnate lists SYNOPSIS
column [-tx] [-c columns] [-s sep] [file ...] DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file operands, or, by default, from the standard input. Empty lines are ignored. The options are as follows: -c Output is formatted for a display columns wide. -s Specify a set of characters to be used to delimit columns for the -t option. -t Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with the characters supplied using the -s option. Useful for pretty-printing displays. -x Fill columns before filling rows. ENVIRONMENT
The COLUMNS, LANG, LC_ALL and LC_CTYPE environment variables affect the execution of column as described in environ(7). EXIT STATUS
The column utility exits 0 on success, and >0 if an error occurs. EXAMPLES
(printf "PERM LINKS OWNER GROUP SIZE MONTH DAY " ; printf "HH:MM/YEAR NAME " ; ls -l | sed 1d) | column -t SEE ALSO
colrm(1), ls(1), paste(1), sort(1) HISTORY
The column command appeared in 4.3BSD-Reno. BUGS
Input lines are limited to LINE_MAX (2048) bytes in length. BSD
July 29, 2004 BSD
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