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//java public static int alternatingCharacters(String s) { return (int)IntStream.range(0, s.length()-1).filter(i->s.charAt(i)==s.charAt(i+1)).count(); }
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Alternating Characters
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//java public static int alternatingCharacters(String s) { return (int)IntStream.range(0, s.length()-1).filter(i->s.charAt(i)==s.charAt(i+1)).count(); }