high-precision-four-fundamental-rules
v1.2.3
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a npm packge of high-precision-four-fundamental-rules, which can make up for the defect of accuracy of native JS.
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high-precision-four-fundamental-rules
a npm packge of high-precision-four-fundamental-rules, which can make up for the defect of accuracy of native JS. (高精度的基本四则运算npm包,用来弥补原生JS计算精度缺失的缺陷)
Install
$ npm install high-precision-four-fundamental-rules --save
Usage
// type 1
import precisionArithmetic from 'high-precision-four-fundamental-rules';
precisionArithmetic.add(1, 2, 4); // '3.0000'
precisionArithmetic.subtract(1, 2, 3); // '-1.000';
precisionArithmetic.multiply(1, 2, 2); // '2.00';
precisionArithmetic.divide(1, 3, 7); // '0.3333333';
// type 2
import {add, subtract, multiply, divide} from 'high-precision-four-fundamental-rules';
add(1, 2, 4); // '3.0000'
subtract(1, 2, 3); // '-1.000';
multiply(1, 2, 2); // '2.00';
divide(1, 3, 7); // '0.3333333';
API
add(加法)
precisionArithmetic.add(num1, num2, fixedLength);
num, num2
Require: true
Type: number or string
fixedLength
Require: false
Type: number
subtract(减法)
precisionArithmetic.subtract(num1, num2, fixedLength);
num, num2
Require: true
Type: number or string
fixedLength
Require: false
Type: number
multiply(乘法)
precisionArithmetic.multiply(num1, num2, fixedLength);
num, num2
Require: true
Type: number or string
fixedLength
Require: false
Type: number
divide(除法)
precisionArithmetic.divide(num1, num2, fixedLength);
num, num2
Require: true
Type: number or string
fixedLength
Require: false
Type: number
Warning
In consideration of toFixed
function in JavaScript not applicable to most high precision scenes like invoice amount or banking business, I rewrite it by rounding way. You can see the source code in index.js
.
(考虑到原生JS中toFixed
方法并不适用于银行或发票业务等高精度场景,作者用四舍五入算法重写了改方法,你可以在index.js
看到源码。