Take a look at reduce from List::Util. I think you want something like the third line of this litttle program: 
my @foo = ([qw(one two)], [qw(three four)], [qw(five six)]);
# use List::Util 'reduce';
# oops: my $str = reduce {"[$a,$b]"} map { reduce {"[$a,$b]"} @$_ } @f
+oo;
my $str = sprintf "[%s]", join ',', map { sprintf '["%s"]', join '","'
+, @$_} @foo;
print "--- $str ---\n";

[download]
Thanks to Anonymonk for pointing out that I had tested insufficiently. And now I've got the quoting. But I'm not using reduce anymore.
Caution: Contents may have been coded under pressure.

In reply to Re: help needed with map by Roy Johnson
in thread help needed with map by nmerriweather

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