Can someone help me to understand why using \d* returns an array containing an empty string, whereas using \d+ returns ["100"] (as expected). I get why the \d+ works, but don't see why exactly \d* doesn't work. Does using the * cause it to return a zero-length match, and how exactly does this work?Can someone help me to understand why using \d*
阅读背景：
为什么String.match（/ \ d * /）返回一个空字符串？
来源：互联网
分享到：
