in reply to Creating array name by susbtituting string

Use a hash of arrays: 
my %isis_adjacencies;
for my $R2 (@array) {
    push @{ $isis_adjacencies{$R2} }, $R2;
}

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Do you really want to store the key as the value?

See Why it's stupid to `use a variable as a variable name' for reasons not to do it the way you originally asked for.

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

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In Section Seekers of Perl Wisdom