Cur dir: /folder/blahA/blah1; Cur file: file.txt; Num Lines: 8
Cur dir: /folder/blahA/blah2; Cur file: file.txt; Num Lines: 8
Cur dir: /folder/blahA/blah3; Cur file: file.txt; Num Lines: 8
Cur dir: /folder/blahA/blah4; Cur file: file.txt; Num Lines: 8
Cur dir: /folder/blahA/blah5; Cur file: file.txt; Num Lines: 8
Cur dir: /folder/blahA/blah6; Cur file: file.txt; Num Lines: 8

Cur dir: /folder/blahB/blah1; Cur file: file.txt; Num Lines: 10
Cur dir: /folder/blahB/blah2; Cur file: file.txt; Num Lines: 10
Cur dir: /folder/blahB/blah3; Cur file: file.txt; Num Lines: 10
Cur dir: /folder/blahB/blah4; Cur file: file.txt; Num Lines: 12
Cur dir: /folder/blahB/blah5; Cur file: file.txt; Num Lines: 10
Cur dir: /folder/blahB/blah6; Cur file: file.txt; Num Lines: 10

So the offending folder of blahB has one text file that doesn't match up to the rest. How can I detect and alert on that? Basically, I want to set True if all num lines are equal to each other per directory and False if they don't

Well, I don't know about "the best method," but here's one method:

use Modern::Perl;

my @same    = (8) x 8;                    # an array of eight 8s
my @notSame = qw/ 10 10 10 12 10 10 /;

say "The array's elements are"
  . ( sameArrayElements(@same) ? '' : ' not' )
  . ' the same.';

sub sameArrayElements {
    my %hash = map { $_ => 1 } @_;
    keys %hash == 1 ? 1 : 0;
}
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If you send the subroutine sameArrayElements an array, it'll return 1 (true) if the array's elements are identical, and 0 (false) otherwise (even if an empty array is sent). As shown above, the output is:

The array's elements are the same.
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Try sameArrayElements with @notSame.

The subroutine uses map to iterate through all elements of the sent array, populating %hash with key/value pairs (the $_ => 1 notation). If the array elements are identical, there should be only one key--and the last line in the subroutine tests for that.

Thus, if you pushed each numLines from a dir read onto an array, and then sent that array to sameArrayElements, it'll tell you whether all files in that dir have the same number of lines or not. (Be sure the array's empty, e.g, by using my @array;, before pushing values onto it.)

Makes sense, but I have absolutely no idea how to do that! :) (newbie Perl writer here...) So my code as it stands now is:

find(\&countLines, $dir);

sub countLines {
    /\.txt$/ or return;

    my $completePath = $File::Find::name;
    my $curDir       = $File::Find::dir;
    my $curFile      = $_;

my @lines = read_file( $curFile ) ;
my $numLines = @lines;
    print "Cur dir: $curDir; Cur file: $curFile; Num Lines: $numLines 
+\n";
  

print "The array's elements are"
  . ( sameArrayElements(@lines) ? '' : ' not' )
  . ' the same.';

sub sameArrayElements {
    my %hash = map { $_ => 1 } @_;
    keys %hash == 1 ? 1 : 0;
}

}
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Obviously @lines won't work since its matching up against only 1 array value per file...so how would you bulk each array value into a blank array PER directory....