Cancel down 2 integers Post: 302587737

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Top Forums Shell Programming and Scripting Cancel down 2 integers Post 302587737 by jakunar on Thursday 5th of January 2012 09:26:04 PM

01-05-2012

Registered User

Thank you balajesuri!

I like you short perl version...

Meanwhile I tried to write something on my own and finally managed to do so..

It's not pretty and it's not optimized, but it works..
Would be nice, if s.o. could tell me, if I made any mistakes,
or if s.th. could/should be made differently..

Here is my bash-version using: comm, cut, factor, let, sed and tr

Code:

#!/bin/bash
## reduce2ints.sh

#
# returns the reduced values of 2 given integers.
#

# error-handling
if [[ ( "$#" -lt 2 ) ]]; then
  echo -e "Error!!!\x0ATry \"$0 value1 value2\"";
  exit 1;
else

# put parameters in own variables
  X=$1;  
  Y=$2;
  
# split values into their prime-factors and put them in arrays
  declare -a XPrimes=$(factor $X | cut -d$'\x20' -f2-);
  declare -a YPrimes=$(factor $Y | cut -d$'\x20' -f2-);
  
# subtract arrays from eachother to get the differences
  declare -a RestX=("$(comm -23 <(echo ${XPrimes} | sed 's/ /\n/g') <(echo ${YPrimes} | sed 's/ /\n/g') | tr "\n" " ")");
  declare -a RestY=("$(comm -13 <(echo ${XPrimes} | sed 's/ /\n/g') <(echo ${YPrimes} | sed 's/ /\n/g') | tr "\n" " ")");
  
# prepare outvariables
  NewX=1;
  NewY=1;

# calculate the 'rests'
  for element in ${RestX[@]}; do
    let NewX=$NewX*$element;
  done
  
  for element in ${RestY[@]}; do
    let NewY=$NewY*$element;
  done
  
# output the solutions
  echo "1. Reduced Value=$NewX";
  echo "2. Reduced Value=$NewY";
fi

# EOF

Good night and thanks again!
jakunar

jakunar

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Hi all In Aix system Someone know i want to cancel the massage. if some user print something and user root deleting the job i got brodcast message " message from queueing system job number XXX has been deleteing from queue. <EOT> " I use the cancel command

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LEARN ABOUT NETBSD

factor

FACTOR(6)							 BSD Games Manual							 FACTOR(6)

NAME

     factor -- factor a number

SYNOPSIS

     factor [number ...]

DESCRIPTION

     The factor utility factors integers larger than 1.  When a number is factored, it is printed, followed by a ``:'', and the list of (prime)
     factors on a single line.	Factors are listed in ascending order, and are preceded by a space.  If a factor divides a value more than once,
     it will be printed more than once.

     When factor is invoked with one or more arguments, each argument will be factored.

     When factor is invoked with no arguments, factor reads numbers, one per line, from standard input, until end of file or error.  Leading
     white-space and empty lines are ignored.  Numbers may be preceded by a single +.  Integer less than 2 are rejected.  Numbers are terminated
     by a non-digit character (such as a newline).  After a number is read, it is factored.  Input lines must not be longer than LINE_MAX - 1
     (currently 2047) characters.

     By default, factor is compiled against the OpenSSL bignum implementation openssl_bn(3), which lets it handle arbitrarily large values.  (Note
     however that very large values can take a very long time to factor.) If factor is compiled without OpenSSL it is limited to the maximum value
     of unsigned long.

DIAGNOSTICS

     Out of range or invalid input results in an appropriate error message being written to standard error.

BSD
								   May 15, 2010 							       BSD

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