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high-precision-four-fundamental-rules

1.2.3 • Public • Published

high-precision-four-fundamental-rules

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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. (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。

Install

npm i high-precision-four-fundamental-rules

DownloadsWeekly Downloads

1

Version

1.2.3

License

ISC

Unpacked Size

10.3 kB

Total Files

5

Last publish

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