function formatNumber(num) {
if (!/^(/+|-)?(/d+)(/./d+)?$/.test(num)) {
return num;
}
var a = RegExp.$1, b = RegExp.$2, c = RegExp.$3;
var re = new RegExp().compile("(//d)(//d{3})(,|$)");
while (re.test(b)) b = b.replace(re, "$1,$2$3");
return a + "" + b + "" + c;
}
原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/tech/pnotes/8797.html