我通常在JavaScript中使用以下代码来按空格分割字符串.
"The quick brown fox jumps over the lazy dog.".split(/\s+/);
// ["The", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog."]
这当然可以在单词之间存在多个空白字符时起作用.
"The quick brown fox jumps over the lazy dog.".split(/\s+/);
// ["The", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog."]
问题是当我有一个具有前导或尾随空格的字符串时,在这种情况下,生成的字符串数组将在数组的开头和/或结尾包含一个空字符.
" The quick brown fox jumps over the lazy dog. ".split(/\s+/);
// ["", "The", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog.", ""]
消除这些空字符是一项微不足道的任务,但如果可能的话,我宁愿在正则表达式中处理这个问题.有谁知道我可以用什么正则表达式来实现这个目标？