I'm not sure what your "could be removed" string in the output is supposed to denote, but assuming that output string could be removed, the following may provide some ideas: 

use strict;
use warnings;

my @cleared = (
    'JOB::HEREISASTRING', 'Something',
    'StringA',            'StringB',
    'StringC',            'StringD',
    'Something Else',     'StringE',
    'StringF',            'StringG',
    'StringH ',           'JOB::HEREISANOTHERSTRING',
    'Something',          'StringI',
    'StringJ',            'StringK',
    'StringL',            'Something Else',
    'StringM',            'StringN',
    'StringO',            'StringP ',
);

my @result;
my $prefix = '~~Something~~';

foreach my $x (@cleared) {
    if ($x =~ /JOB::(.*)/) {
        $prefix = "";
    }
    elsif ($x =~ m/^Something Else/) {
        $prefix = "~~Something Else~~";
    }
    elsif ($x =~ m/^Something/) {
        $prefix = "~~Something~~";
    }

    print "$prefix$x\n";
}

[download]

Prints:

JOB::HEREISASTRING
~~Something~~Something
~~Something~~StringA
~~Something~~StringB
~~Something~~StringC
~~Something~~StringD
~~Something Else~~Something Else
~~Something Else~~StringE
~~Something Else~~StringF
~~Something Else~~StringG
~~Something Else~~StringH 
JOB::HEREISANOTHERSTRING
~~Something~~Something
~~Something~~StringI
~~Something~~StringJ
~~Something~~StringK
~~Something~~StringL
~~Something Else~~Something Else
~~Something Else~~StringM
~~Something Else~~StringN
~~Something Else~~StringO
~~Something Else~~StringP

[download]

The trick is to use a "state" variable (in this case $prefix) to remember what state the parser is in. This is a trivial case of a state machine which can be used to simplify implementing many parsing and processing systems.

Optimising for fewest key strokes only makes sense transmitting to Pluto or beyond

In reply to Re: Loop Array - If $var is something write values until $var is something else by GrandFather
in thread Loop Array - If $var is something write values until $var is something else by maikelnight

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