我想将一个句子分成单词和单词之间的部分（我称之为分隔符）。
sentence = "First-tea,-then-coffee!"
=> "First-tea,-then-coffee!"
words = sentence.split(/\W+/) # Splits by non-word characters
=> ["First", "tea", "then", "coffee"]
delimiters = sentence.split(/\w+/) # Splits by word characters
=> ["", "-", ",-", "-", "!"]
拆分成单词效果很好，但我对分隔符有疑问。
第一个空字符串在分隔符数组中来自哪里？
感谢您的解释。