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Top Forums Shell Programming and Scripting Need immediate help with sorting!!! Post 302221971 by joeyg on Tuesday 5th of August 2008 04:06:17 PM
Old 08-05-2008
Hammer & Screwdriver I will try to explain

Code:
> cat file1 | sed 's/\/\*/#\/\*/' | tr "\n" "~" | tr "#" "\n" | sort | tr -s "~" | tr "~" "\n"

display the file
change /* to #/* (to find later)
translate <new-line> to a ~
translate the # to a <new-line> (now, each record on one line only instead of 4)
sort
translate to get rid of (suppress) repetitive ~ characters
translate ~ to <new-line> (to put line back to four lines)

I often take multi-line inputs, and tr the <new-line> to ~ so I can treat multi-line records as one. Useful for sort and grep, for example. But, must place some kind of marker on the lines to assist in later putting the lines back to their original state.
 
Test Your Knowledge in Computers #432
Difficulty: Medium
As of May 2017, 94.5% of the 10 million most popular web pages used JavaScript, according to w3techs.com.
True or False?

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locale(3pm)						 Perl Programmers Reference Guide					       locale(3pm)

NAME
locale - Perl pragma to use or avoid POSIX locales for built-in operations SYNOPSIS
@x = sort @y; # Unicode sorting order { use locale; @x = sort @y; # Locale-defined sorting order } @x = sort @y; # Unicode sorting order again DESCRIPTION
This pragma tells the compiler to enable (or disable) the use of POSIX locales for built-in operations (for example, LC_CTYPE for regular expressions, LC_COLLATE for string comparison, and LC_NUMERIC for number formatting). Each "use locale" or "no locale" affects statements to the end of the enclosing BLOCK. Starting in Perl 5.16, a hybrid mode for this pragma is available, use locale ':not_characters'; which enables only the portions of locales that don't affect the character set (that is, all except LC_COLLATE and LC_CTYPE). This is useful when mixing Unicode and locales, including UTF-8 locales. use locale ':not_characters'; use open ":locale"; # Convert I/O to/from Unicode use POSIX qw(locale_h); # Import the LC_ALL constant setlocale(LC_ALL, ""); # Required for the next statement # to take effect printf "%.2f ", 12345.67' # Locale-defined formatting @x = sort @y; # Unicode-defined sorting order. # (Note that you will get better # results using Unicode::Collate.) See perllocale for more detailed information on how Perl supports locales. NOTE
If your system does not support locales, then loading this module will cause the program to die with a message: "Your vendor does not support locales, you cannot use the locale module." perl v5.18.2 2013-11-04 locale(3pm)

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