5个javascript的数字格式化函数分享
2024-05-06 14:22:55
供稿：网友
十进制四舍五入
这两段代码帮助你做到四舍五入，对于你显示价格或者订单比较有用：
代码1：
代码如下:
function CurrencyFormatted(amount) {
var i = parseFloat(amount);
if(isNaN(i)) { i = 0.00; }
var minus = '';
if(i < 0) { minus = '-'; }
i = Math.abs(i);
i = parseInt((i + .005) * 100);
i = i / 100;
s = new String(i);
if(s.indexOf('.') < 0) { s += '.00'; }
if(s.indexOf('.') == (s.length - 2)) { s += '0'; }
s = minus + s;
return s;
}
/**
* Usage: CurrencyFormatted(12345.678);
* result: 12345.68
**/
代码2：
代码如下:
function format_number(pnumber,decimals){
if (isNaN(pnumber)) { return 0};
if (pnumber=='') { return 0};
var snum = new String(pnumber);
var sec = snum.split('.');
var whole = parseFloat(sec[0]);
var result = '';
if(sec.length > 1){
var dec = new String(sec[1]);
dec = String(parseFloat(sec[1])/Math.pow(10,(dec.length - decimals)));
dec = String(whole + Math.round(parseFloat(dec))/Math.pow(10,decimals));
var dot = dec.indexOf('.');
if(dot == -1){
dec += '.';
dot = dec.indexOf('.');
}
while(dec.length <= dot + decimals) { dec += '0'; }
result = dec;
} else{
var dot;
var dec = new String(whole);
dec += '.';
dot = dec.indexOf('.');
while(dec.length <= dot + decimals) { dec += '0'; }
result = dec;
}
return result;
}
/**
* Usage: format_number(12345.678, 2);
* result: 12345.68
**/
添加逗号
这俩段代码帮助你添加逗号到每三位数字中，这让大的数字比较容易查看。
代码1：
代码如下:
function CommaFormatted(amount) {
var delimiter = ","; // replace comma if desired
amount = new String(amount);
var a = amount.split('.',2)
var d = a[1];
var i = parseInt(a[0]);
if(isNaN(i)) { return ''; }
var minus = '';
if(i < 0) { minus = '-'; }
i = Math.abs(i);
var n = new String(i);
var a = [];
while(n.length > 3)
{
var nn = n.substr(n.length-3);
a.unshift(nn);
n = n.substr(0,n.length-3);
}
if(n.length > 0) { a.unshift(n); }
n = a.join(delimiter);
if(d.length < 1) { amount = n; }
else { amount = n + '.' + d; }
amount = minus + amount;
return amount;
}
/**
* Usage: CommaFormatted(12345678);
* result: 12,345,678
**/
代码2：
代码如下:
function addCommas(nStr) {
nStr += '';
var x = nStr.split('.');
var x1 = x[0];
var x2 = x.length >; 1 ? '.' + x[1] : '';
var rgx = /(d+)(d{3})/;
while (rgx.test(x1)) {
x1 = x1.replace(rgx, '$1' + ',' + '$2');
}
return x1 + x2;
}
/**
* Usage: addCommas(12345678);
* result: 12,345,678
**/
数字格式化，来自PHP
这段javascript代码功能设计来自PHP的nubmer_format功能。能够四舍五入并且加入逗号分隔。而且可以自定义10进制分隔。
