"15000000".split("").reverse().join("").replace(/(\d{3})/g, "$1,").split("").reverse().join("");
"115000000".split("").reverse().join("").replace(/(\d{3})(?=[^$])/g, "$1,").split("").reverse().join("");
var cutStr = function(str)
{
var newStr= new Array(str.length+ parseInt(str.length/3));
newStr[newStr.length-1]=str[str.length-1];
var currentIndex=str.length-1;
for(var i = newStr.length-1;i >= 0;i--)
{
if((newStr.length-i)%4==0)
{
newStr[i]=",";
}
else
{
newStr[i]=str[currentIndex--];
}
}
return newStr.join("")
}
var num="15000000";
console.log(cutStr(num));
function cutStr(str){
var rmb='';
var i2=0;
for(var i=str.length-1; i>=0; i--){
if(i%3==0&&i!=0){
rmb+=str[i2]+',';
}else{
rmb+=str[i2];
}
i2++;
}
return rmb;
}
console.log(cutStr(num));
function cutStr(num) {
var aaa = num.toString();
var arr1 = aaa.split("");
var arr2 = [];
for (var i = 0; i < arr1.length;) {
for (j = 0; j < 3; j++) {
arr2.unshift(arr1[i]);
i++;
if (j == 2 && i < arr1.length) {
arr2.unshift(",");
}
}
}
alert(arr2.join(""));
}
cutStr(12345678);
'1500000000000'.replace(/\B(?=(\d{3})+$)/g,',')
function formatNumber(value) {
value = value.toString();
if (value.length <= 3) {
return value;
} else {
return formatNumber(value.substr(0, value.length - 3)) + ',' + value.substr(value.length - 3);
}
}
console.log(formatNumber(12345678))
var str = '123123211312.333123'.replace(/(?=(?!^)(?:\d{3})+(?:\.|$))(\d{3}(\.\d+$)?)/g,',$1');
console.log(str)
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