源网站：https://wenda.so.com/q/1461341937726162
js将数字千位分割的6个方法
function toThousands1(num) {
var result = [],
counter = 0;
num = (num || 0).toString().split('');
for(var i = num.length - 1; i >= 0; i--) {
counter++;
result.unshift(num[i]);
if(!(counter % 3) && i != 0) {
result.unshift(',');
}
}
return result.join('');
}
function toThousands2(num) {
var result = '',
counter = 0;
num = (num || 0).toString();
for(var i = num.length - 1; i >= 0; i--) {
counter++;
result = num.charAt(i) + result;
if(!(counter % 3) && i != 0) {
result = ',' + result;
}
}
return result;
}
function toThousands3(num) {
var num = (num || 0).toString(),
re = /\d{3}$/,
result = '';
while(re.test(num)) {
result = RegExp.lastMatch + result;
if(num !== RegExp.lastMatch) {
result = ',' + result;
num = RegExp.leftContext;
} else {
num = '';
break;
}
}
if(num) {
result = num + result;
}
return result;
}
function toThousands4(num) {
var num = (num || 0).toString(),
result = '';
while(num.length > 3) {
result = ',' + num.slice(-3) + result;
num = num.slice(0, num.length - 3);
}
if(num) {
result = num + result;
}
return result;
}
function toThousands5(num) {
var num = (num || 0).toString(),
temp = num.length % 3;
switch(temp) {
case 1:
num = '00' + num;
break;
case 2:
num = '0' + num;
break;
}
return num.match(/\d{3}/g).join(',').replace(/^0+/, '');
}
function toThousands6(num) {
return(num || 0).toString().replace(/(\d)(?=(?:\d{3})+$)/g, '$1,');
}下面放上可以直接测试网页
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1,maximum-scale=1,user-scalable=no">
<title></title>
<style type="text/css">
table {
width: 100%;
text-align: center;
}
</style>
</head>
<body>
<table border="0" cellspacing="10" cellpadding="10">
<tr>
<th colspan="7">数字 执行5000次消耗的时间（ms）</th>
</tr>
<tr>
<td>次数</td>
<td>toThousands1</td>
<td>toThousands2</td>
<td>toThousands3</td>
<td>toThousands4</td>
<td>toThousands5</td>
<td>toThousands6</td>
</tr>
<tr>
<td>1</td>
<td>4</td>
<td>1</td>
<td>3</td>
<td>1</td>
<td>14</td>
<td>2</td>
</tr>
<tr>
<td>10</td>
<td>14</td>
<td>1</td>
<td>3</td>
<td>0</td>
<td>7</td>
<td>2</td>
</tr>
<tr>
<td>100</td>
<td>12</td>
<td>1</td>
<td>2</td>
<td>4</td>
<td>5</td>
<td>3</td>
</tr>
<tr>
<td>1000</td>
<td>13</td>
<td>2</td>
<td>3</td>
<td>2</td>
<td>9</td>
<td>5</td>
</tr>
<tr>
<td>10000</td>
<td>21</td>
<td>4</td>
<td>3</td>
<td>1</td>
<td>6</td>
<td>3</td>
</tr>
<tr>
<td>100000</td>
<td>21</td>
<td>3</td>
<td>2</td>
<td>1</td>
<td>5</td>
<td>6</td>
</tr>
<tr>
<td><input type="" name="inp" id="inp" value="" placeholder="输入数字" /></td>
<td id="t1"></td>
<td id="t2"></td>
<td id="t3"></td>
<td id="t4"></td>
<td id="t5"></td>
<td id="t6"></td>
</tr>
</table>
<script src="js/jquery-1.11.2.min.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
$("inp").addEventListener("input", function(event) {
var inpvalue = this.value;
var t1 = toThousands1(inpvalue);
$("t1").innerHTML = t1;
//console.log("t1",t1)
var t2 = toThousands2(inpvalue);
$("t2").innerHTML = t2;
//console.log("t2",t2)
var t3 = toThousands3(inpvalue);
$("t3").innerHTML = t3;
//console.log("t3",t3)
var t4 = toThousands4(inpvalue);
$("t4").innerHTML = t4;
//console.log("t4",t4)
var t5 = toThousands5(inpvalue);
$("t5").innerHTML = t5;
//console.log("t5",t5)
var t6 = toThousands6(inpvalue);
$("t6").innerHTML = t6;
//console.log("t6",t6)
})
function $(id) {
return document.getElementById(id);
}
function toThousands1(num) {
var result = [],
counter = 0;
num = (num || 0).toString().split('');
for(var i = num.length - 1; i >= 0; i--) {
counter++;
result.unshift(num[i]);
if(!(counter % 3) && i != 0) {
result.unshift(',');
}
}
return result.join('');
}
function toThousands2(num) {
var result = '',
counter = 0;
num = (num || 0).toString();
for(var i = num.length - 1; i >= 0; i--) {
counter++;
result = num.charAt(i) + result;
if(!(counter % 3) && i != 0) {
result = ',' + result;
}
}
return result;
}
function toThousands3(num) {
var num = (num || 0).toString(),
re = /\d{3}$/,
result = '';
while(re.test(num)) {
result = RegExp.lastMatch + result;
if(num !== RegExp.lastMatch) {
result = ',' + result;
num = RegExp.leftContext;
} else {
num = '';
break;
}
}
if(num) {
result = num + result;
}
return result;
}
function toThousands4(num) {
var num = (num || 0).toString(),
result = '';
while(num.length > 3) {
result = ',' + num.slice(-3) + result;
num = num.slice(0, num.length - 3);
}
if(num) {
result = num + result;
}
return result;
}
function toThousands5(num) {
var num = (num || 0).toString(),
temp = num.length % 3;
switch(temp) {
case 1:
num = '00' + num;
break;
case 2:
num = '0' + num;
break;
}
return num.match(/\d{3}/g).join(',').replace(/^0+/, '');
}
function toThousands6(num) {
return(num || 0).toString().replace(/(\d)(?=(?:\d{3})+$)/g, '$1,');
}
</script>
</body>
</html>