/**
* rand 随机数
* @since 1.0.0
* @param {Number} min
* @param {Number} max
* @returns {Number}
*/
export function rand(min, max) {
if (arguments.length === 2) {
return Math.floor(min + Math.random() * ( (max+1) - min ))
}else{
return null;
}
}
/**
* accAdd 高精度加法
* @since 1.0.0
* @param {Number} arg1
* @param {Number} arg2
* @returns {Number}
*/
export function accAdd(arg1, arg2) {
let r1, r2, max;
try { r1 = arg1.toString().split(".")[1].length } catch (e) { r1 = 0 }
try { r2 = arg2.toString().split(".")[1].length } catch (e) { r2 = 0 }
max = Math.pow(10, Math.max(r1, r2))
return (arg1 * max + arg2 * max) / max
}
/**
* accSub 高精度减法
* @since 1.0.0
* @param {Number} arg1
* @param {Number} arg2
* @returns {Number}
*/
export function accSub(arg1, arg2) {
let r1, r2, max, min;
try { r1 = arg1.toString().split(".")[1].length } catch (e) { r1 = 0 }
try { r2 = arg2.toString().split(".")[1].length } catch (e) { r2 = 0 }
max = Math.pow(10, Math.max(r1, r2));
//动态控制精度长度
min = (r1 >= r2) ? r1 : r2;
return ((arg1 * max - arg2 * max) / max).toFixed(min)
}
/**
* accSub 高精度乘法
* @since 1.0.0
* @param {Number} arg1
* @param {Number} arg2
* @returns {Number}
*/
export function accMul(arg1, arg2) {
let max = 0, s1 = arg1.toString(), s2 = arg2.toString();
try { max += s1.split(".")[1].length } catch (e) { }
try { max += s2.split(".")[1].length } catch (e) { }
return Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, max)
}
/**
* accSub 高精度除法
* @since 1.0.0
* @param {Number} arg1
* @param {Number} arg2
* @returns {Number}
*/
export function accDiv(arg1, arg2) {
var t1 = 0, t2 = 0, r1, r2;
try { t1 = arg1.toString().split(".")[1].length } catch (e) { }
try { t2 = arg2.toString().split(".")[1].length } catch (e) { }
r1 = Number(arg1.toString().replace(".", ""))
r2 = Number(arg2.toString().replace(".", ""))
return (r1 / r2) * pow(10, t2 - t1)
}
Number.prototype.div = function (arg) {
return accDiv(this, arg);
}
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