wfquery
Version:
like jQuery but just for new browser
74 lines (71 loc) • 2.6 kB
JavaScript
;(function (root, factory) {
if (typeof define === 'function' && define.amd) {
define(factory);
} else {
root.NumberUtil = factory();
}
}(this,function(require, exports, module) {
var _c = "零壹贰叁肆伍陆柒捌玖".split("");
var _d = "萬***亿***萬***圆";
var _e = "仟,佰,拾,".split(",");
var _0 = "0000000000000000";
var _decimalPart = function(b){ //人民币读数转化小数部分
switch(b.length){
case 0: return "整";
case 1: return _c[b] + "角";
default:
return _c[b.charAt(0)] + "角" + _c[b.charAt(1)] + "分"
}
};
var _set = {
"B": 1,
"KB": 1024,
"MB" : 1024*1024,
"GB" : 1024*1024*1024,
"TB" : 1024*1024*1024*1024
};
var _getUnit = function(n){ //判断使用哪个单位合适
var i = 0, _n = n;
while(_n > 1024){
_n /= 1024;
i++;
}
return ["B","KB","MB","GB","TB"][i] || "TB";
};
return {
/** 人民币大写读数 */
toRMB: function(n){
var s = (""+n).split("."),
a = s[0], //整数部分
b = s[1] || ""; //小数部分
a = _0.substring(a.length) + a; //整数高位补零,位数弄成16位,最高支持到万亿数量级.
var intPart = a.replace(/\d{4}/g,function(match4,index4){
var unit4 = match4.replace(/\d/g,function(match,index){
var num = Number(match);
return _c[num] + (num ? _e[index] : ""); // 每位数字读数, 如果不是零还要带单位
}).replace(/^(.*?)[零]*$/,"$1").replace(/零+/,"零"); //每个4位整数读数中尾零不读，中间的零合并
return unit4 + _d.charAt(index4); //每4位读数完毕, 追加万进制单位
});
intPart = intPart
.replace(/亿萬/,"亿") // 万级别的数字均为0时, 不读'萬'字
.replace( /^[^壹贰叁肆伍陆柒捌玖]+(.*?)$/, "$1"); //从第一个不是零的数位开始读数。
return intPart + _decimalPart(b);
},
/**标准千机制表示法*/
to1000Hex:function(n,split){
var s = (""+n).split("."),
a = s[0], //整数部分
b = s[1] || "", //小数部分
c = b ? "." : ""; //是否加小数点
a = ["","00","0"][a.length%3] + a; //整数高位补零,位数弄成3的倍数.
return a.match(/\d{3}/g).join(split || ",").replace(/^0+(\d+)/,"$1") + c + b;
},
/**数据存储表示法,默认保留小数点后2位*/
toStorage:function(n,unit,fixed_len){
if( !unit || !_set[unit] ){
unit = _getUnit(n);
}
return ( n / _set[unit] ).toFixed(fixed_len||2) + unit;
}
};
}));