in reply to modify ksh variable in perl

You can't modify a ksh variable from perl, but you can set a ksh variable to the output of a perl program: 
result=$(perl -e ...)

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To set an array variable, you can use: 
set -A arrayvar $(perl -e ...)

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Update: For your specific case, this might work well enough: 
set -A result $(echo $string | sed -e 's/;/ /g')

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Re^2: modify ksh variable in perl
by apl (Monsignor) on Apr 17, 2008 at 16:56 UTC
    Revised: Exit returns a number only; of limited use when setting environmental variables. Plesae reap.

    Or, if it's more than a one-liner, the Perl script should end with

    exit( $returned_value );

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[d/l]

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