match?(pattern)
Instance Public methods
Tests whether the given pattern is matched from the current
scan pointer. Returns the length of the match, or nil. The
scan pointer is not advanced.
s = StringScanner.new('test string')
p s.match?(/\w+/) # -> 4
p s.match?(/\w+/) # -> 4
p s.match?(/\s+/) # -> nil
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