FWIW: 

perl -wMstrict -le
"sub standard_commas {
  return @_ == 0 ? ''
       : @_ == 1 ? qq($_[0])
       : @_ == 2 ? qq($_[0] and $_[1])
       : join ', ', shift, standard_commas(@_)
  }
 sub oxford_commas {
  return @_ <= 2 ? standard_commas(@_)
       : @_ == 3 ? qq($_[0], $_[1], and $_[2])
       : join ', ', shift, oxford_commas(@_)
  }
 for (@ARGV) {
  my @words = split;
  print qq(\nfor words: @words);
  print 'standard commas: ', standard_commas(@words);
  print 'oxford commas: ',   oxford_commas  (@words);
  }
"
""   "a"   "a b"   "a b c"   "a b c d"   "a b c d e"   "a c d e f"

for words:
standard commas:
oxford commas:

for words: a
standard commas: a
oxford commas: a

for words: a b
standard commas: a and b
oxford commas: a and b

for words: a b c
standard commas: a, b and c
oxford commas: a, b, and c

for words: a b c d
standard commas: a, b, c and d
oxford commas: a, b, c, and d

for words: a b c d e
standard commas: a, b, c, d and e
oxford commas: a, b, c, d, and e

for words: a c d e f
standard commas: a, c, d, e and f
oxford commas: a, c, d, e, and f

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In reply to Re: Module for making english lists? by AnomalousMonk
in thread Module for making english lists? by markjugg

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