//千位符
function ThousandDigitCharacter(num) {
    var source = String(num).split(".");//按小数点分成2部分
        source[0] = source[0].replace(new RegExp('(\\d)(?=(\\d{3})+$)','ig'),"$1,");//只将整数部分进行都好分割
    return source.join(".");//再将小数部分合并进来
}


var ss = parseFloat('-1234540056.781229');
console.log(typeof ss);
var s = ThousandDigitCharacter(ss);
console.log(s)

var a = [];
for (let i = 0; i < 10; i++) {
  console.log(`for循环里${i}`);		
  a[i] = function () {
    console.log(`方法里输出${i}`);
  };
}
a[6](); 

for (var i = 0; i < 10; i++) {
  console.log(`for循环里${i}`);		
  a[i] = function () {
    console.log(`方法里输出${i}`);
  };
}
a[6]();