ksh insert element in array Post: 302628389

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Top Forums Shell Programming and Scripting ksh insert element in array Post 302628389 by rbatte1 on Monday 23rd of April 2012 11:40:00 AM

04-23-2012

Moderator

You may have to count your way along the array with two pointers. A source address and a target address for a replacement array. The source address gets incremented each time through a loop to copy an element from one to the other, but within the loop there would be an extra increment to the target address and an insert of the zero in the position you want. Something like this may assist:-

Code:

#!/bin/ksh
set -a source_array
set -a target_array

for i in 1 2 3 4 5 6 7 8 9 10 11 12
do                                  # Just loading something into the source.
   source_array[$i]="a${i}a${i}"    # You should already have your data loaded.
done

src_addr=1 ; trg_addr=1

while [ $src_addr -le ${#source_array[*]} ]
do
   target_array[$trg_addr]="${source_array[$src_addr]}"
   echo "Setting target array element $trg_addr from source array element $src_addr value ${source_array[$src_addr]}"
   ((src_addr=$src_addr+1))
   ((trg_addr=$trg_addr+1))

   if [ $trg_addr = 6 ]              # For the required insert
   then
      target_array[$trg_addr]=0    # Set value
      echo "Setting target array element $trg_addr as zero."
      ((trg_addr=$trg_addr+1))   # ... and move pointer along one
   fi
done

I hope that this helps. It may well not be the most efficient way, but it depends how big an array you have and how many times you will run this.

Robin
Liverpool/Blackburn
UK

rbatte1

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suspend

suspend(1)                                                         User Commands                                                        suspend(1)

NAME

       suspend - shell built-in function to halt the current shell

SYNOPSIS

   sh
       suspend

   csh
       suspend

   ksh
       suspend

DESCRIPTION

   sh
       Stops the execution of the current shell (but not if it is the login shell).

   csh
       Stop the shell in its tracks, much as if it had been sent a stop signal with ^Z. This is most often used to stop shells started by su.

   ksh
       Stops the execution of the current shell (but not if it is the login shell).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), kill(1), ksh(1), sh(1), su(1M), attributes(5)

SunOS 5.10                                                          15 Apr 1994                                                         suspend(1)

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