'Groovy: Why does split()ing an empty string by space return a list of one empty string?

I was expecting an empty list but I got:

assert 1 == "".split(/\s+/).size()

and

assert 0 == "".split().size()

Solution 1:^[1]

Maybe you should use tokenize() instead?

assert "".tokenize().size() == 0
assert "foo bar".tokenize() == ['foo', 'bar']

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Solution	Source
Solution 1	DÃ³nal