Logic shuffle Post: 302996459

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Top Forums UNIX for Beginners Questions & Answers Logic shuffle Post 302996459 by wisecracker on Wednesday 26th of April 2017 12:48:37 PM

04-26-2017

Registered User

Quote:

Originally Posted by Indra2011

do we have anything with awk please?

Just look at the man awk file.
From 'man awk' on OSX 10.12.4, default bash terminal.

Code:

       rand   random number on (0,1)

       srand  sets seed for rand and returns the previous seed.

       int    truncates to an integer value

Code:

Last login: Wed Apr 26 17:45:25 on ttys000
AMIGA:amiga~> awk 'BEGIN { print int(rand(srand)*17); }'
14
AMIGA:amiga~> awk 'BEGIN { print int(rand(srand)*17); }'
12
AMIGA:amiga~> awk 'BEGIN { print int(rand(srand)*17); }'
12
AMIGA:amiga~> awk 'BEGIN { print int(rand(srand)*17); }'
1
AMIGA:amiga~> awk 'BEGIN { print int(rand(srand)*17); }'
7
AMIGA:amiga~> awk 'BEGIN { print int(rand(srand)*17); }'
7
AMIGA:amiga~> awk 'BEGIN { print int(rand(srand)*17); }'
5
AMIGA:amiga~> awk 'BEGIN { print int(rand(srand)*17); }'
8
AMIGA:amiga~> awk 'BEGIN { print int(rand(srand)*17); }'
12
AMIGA:amiga~> awk 'BEGIN { print int(rand(srand)*17); }'
10
AMIGA:amiga~> _

Hope this helps...

wisecracker

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LEARN ABOUT NETBSD

shuffle

SHUFFLE(1)						    BSD General Commands Manual 						SHUFFLE(1)

NAME

     shuffle -- print a random permutation of the command line arguments

SYNOPSIS

     shuffle [-0] [-f filename ...] [-n number] [-p number] [arg] [...]

DESCRIPTION

     The shuffle program prints a random permutation (or ``shuffle'') of its command line arguments.  This can be useful in shell scripts for
     selecting a random order in which to do a set of tasks, view a set of files, etc.

     If the -f option is given, the data is taken from that files' contents or if the filename is - ``stdin''.

     If the -n option is given, its argument is treated as a number, and the program prints a random permutation of the numbers greater than or
     equal to 0 and less than the argument.

     If the -p option is given, its argument is treated as a number, and the program prints that number of randomly selected lines or arguments in
     a random order.

     The -0 option changes the field separator character from 
 to , so that the output is suitable to be sent to xargs(1) (to handle filenames
     with whitespace in them).

EXAMPLES

	   $ shuffle a b c d
	   c
	   b
	   d
	   a
	   $ shuffle -p 1 a b c d
	   d
	   $ shuffle -n 4 -p 2
	   0
	   3

SEE ALSO

     jot(1), random(6)

HISTORY

     The shuffle program first appeared in NetBSD 1.4.

AUTHORS

     Written by Perry E. Metzger <perry@piermont.com>.

BSD
								 February 18, 2009							       BSD

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LEARN ABOUT NETBSD

shuffle