I am working on a regex to split up a string of text with the following considerations:
  1. split on whitespace
  2. split on a digit/letter boundary
  3. split on a letter/digit boundary
This works: 
    my $string = "A BC 1 23DEF45 6";
    my @parts = split /(?:\s+|(?<=\d)(?=[A-Z])|(?<=[A-Z])(?=\d))/i, $s
+tring;

    foreach my $part (@parts) {
        print "part = $part\n";
    }

[download]
And yields the result of:
part = A
part = BC
part = 1
part = 23
part = DEF
part = 45
part = 6

- Which is exactly what i want.

But, I was wondering if i could shorten the regex (leave the /\s+/ part alone so that it says look-behind for either a digit or letter, and if you find one, look-ahead for the other pattern.
dont know if this is do-able, but i have many uses for such a thing.
thanks much

In reply to Regex - unordered lookaround syntax by shemp

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