將字串根據字數分群
groupByCharCount('abcdefg', 2) === 'ab cd ef g'
groupByCharCount('abcdefg', 3) === 'abc def g'
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將字串根據字數分群
groupByCharCount('abcdefg', 2) === 'ab cd ef g'
groupByCharCount('abcdefg', 3) === 'abc def g'