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Top Forums Shell Programming and Scripting Sorting Date Field with Sort -k :/ Post 302586844 by whyte_rhyno on Tuesday 3rd of January 2012 12:22:15 PM
Old 01-03-2012
Quote:
Originally Posted by Glitch100
Code:
mike,0208,19/08/1991
nickle,0182,02/07/1960
...

Like that?

Thank you for hasty reply.

---------- Post updated at 12:15 PM ---------- Previous update was at 12:06 PM ----------



As far as I am aware the / has nothing to do with it as I am using the -k wildcard which does it by position.
:/
As I said, I know this is an assignment, so if I just give you the answer, we'll both get into trouble and you won't learn anything. I can see you're actually trying (unlike most of our peers), but the fact remains that this is an assignment meant to test our abilities.

Look at what sort has to offer. -n offers a numerical sort (great for dates which have been chopped up...)

As I said previously to you, this is a huge hint now, make things easier for yourself and THINK about the order of your .csv file. Who said those details had to go in that order you've specified...

Yes, you will still need -k, too. But think about what it does.


That's all I'm offering. :P
 

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SORT(1) 							   User Commands							   SORT(1)

NAME
sort - sort lines of text files SYNOPSIS
sort [OPTION]... [FILE]... sort [OPTION]... --files0-from=F DESCRIPTION
Write sorted concatenation of all FILE(s) to standard output. Mandatory arguments to long options are mandatory for short options too. Ordering options: -b, --ignore-leading-blanks ignore leading blanks -d, --dictionary-order consider only blanks and alphanumeric characters -f, --ignore-case fold lower case to upper case characters -g, --general-numeric-sort compare according to general numerical value -i, --ignore-nonprinting consider only printable characters -M, --month-sort compare (unknown) < `JAN' < ... < `DEC' -h, --human-numeric-sort compare human readable numbers (e.g., 2K 1G) -n, --numeric-sort compare according to string numerical value -R, --random-sort sort by random hash of keys --random-source=FILE get random bytes from FILE -r, --reverse reverse the result of comparisons --sort=WORD sort according to WORD: general-numeric -g, human-numeric -h, month -M, numeric -n, random -R, version -V -V, --version-sort natural sort of (version) numbers within text Other options: --batch-size=NMERGE merge at most NMERGE inputs at once; for more use temp files -c, --check, --check=diagnose-first check for sorted input; do not sort -C, --check=quiet, --check=silent like -c, but do not report first bad line --compress-program=PROG compress temporaries with PROG; decompress them with PROG -d --files0-from=F read input from the files specified by NUL-terminated names in file F; If F is - then read names from standard input -k, --key=POS1[,POS2] start a key at POS1 (origin 1), end it at POS2 (default end of line) -m, --merge merge already sorted files; do not sort -o, --output=FILE write result to FILE instead of standard output -s, --stable stabilize sort by disabling last-resort comparison -S, --buffer-size=SIZE use SIZE for main memory buffer -t, --field-separator=SEP use SEP instead of non-blank to blank transition -T, --temporary-directory=DIR use DIR for temporaries, not $TMPDIR or /tmp; multiple options specify multiple directories -u, --unique with -c, check for strict ordering; without -c, output only the first of an equal run -z, --zero-terminated end lines with 0 byte, not newline --help display this help and exit --version output version information and exit POS is F[.C][OPTS], where F is the field number and C the character position in the field; both are origin 1. If neither -t nor -b is in effect, characters in a field are counted from the beginning of the preceding whitespace. OPTS is one or more single-letter ordering options, which override global ordering options for that key. If no key is given, use the entire line as the key. SIZE may be followed by the following multiplicative suffixes: % 1% of memory, b 1, K 1024 (default), and so on for M, G, T, P, E, Z, Y. With no FILE, or when FILE is -, read standard input. *** WARNING *** The locale specified by the environment affects sort order. Set LC_ALL=C to get the traditional sort order that uses native byte values. AUTHOR
Written by Mike Haertel and Paul Eggert. REPORTING BUGS
Report sort bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report sort translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for sort is maintained as a Texinfo manual. If the info and sort programs are properly installed at your site, the command info coreutils 'sort invocation' should give you access to the complete manual. GNU coreutils 8.5 February 2011 SORT(1)
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