如何使用rereplace修剪前导零和尾随零？
它与插入符号,星号和美元符号有关.
一个0.
解决方法
reReplace(string,"^0*(.*?)0*$","$1","ALL")
那是：
^ = starting with 0* = the character "0",zero or more times () = capture group,referenced later as $1 .* = any character,zero or more times *? = zero or more,but lazy matching; try not to match the next character 0* = the character "0",zero or more times,this time at the end $= end of the string
