js正则匹配的问题

Question

用正则匹配,只允许有数字和逗号

var str = "2456789,2345678765432,,,,234567876543,,,45678976543,,,,3456765432";

数字中间的逗号只允许出现一次;多的替换成空;如何写.大神在哪...
希望得到的结果2456789,2345678765432,234567876543,45678976543,3456765432;

Answer 1

replace(/,+/g, ",")

Answer 2

var re = /\d+\,?/g;
var str = "2456789,2345678765432,,,,234567876543,,,45678976543,,,,3456765432";
var myArray = str.match(re);
console.log(myArray);
VM389472:4 (5) ["2456789,", "2345678765432,", "234567876543,", "45678976543,", "3456765432"]