@lzwme/asmd-calc NPM

@lzwme/asmd-calc

license MIT

A short and concise JavaScript library for the four fundamental operations of arithmetic, which supports the addition, subtraction, multiplication and division calculation of floating-point precision.

Features

Short and sharp. It only includes the calculation of addition, subtraction, multiplication and division. The core code is less than 100 lines. There is no other dependency.
High execution performance. Only the four operations that can be accurately expressed by the front end are considered to realize simple logic and better execution performance than the open source library with rich and complex functions (see Benchmark for details).
Accurate and stable. The accumulation of many years of practical experience in the development of several financial trading systems covers various common calculation use case error scenarios.

Not Applicable

For numerical processing involving very large numbers that front-end can not be accurately represented.
Complex mathematical scientific calculation.

These libraries are recommended:

Install

# npm
npm i @lzwme/asmd-calc
# yarn
yarn add @lzwme/asmd-calc
# pnpm
pnpm add @lzwme/asmd-calc

Useage

1. Calculation example using simple tool method

es module

import { add } from '@lzwme/asmd-calc';

console.log(add(0.1, 0.2, 0.3));
// => 0.6

commonjs

const calc = require('@lzwme/asmd-calc');

console.log(calc.add(0.1, 0.2, 0.3));
// => 0.6

2. Calculation example using chain operation

es module

import { AsmdCalc } from '@lzwme/asmd-calc';

const a = new AsmdCalc(0);
console.log(+a.add(0.1).add(0.2, 0.3));
// => 0.6

const b = new AsmdCalc(0.3);
  b.add(0.1, 0.2)
    .add(0.1)
    .sub(0.1, 0.2)
    .sub(0.1)
    .div(0.3)
    .mul(0.3);
console.log(+b);
// => 0.3
console.log(b.value);
// => 0.3

commonjs

const AsmdCalc = require('@lzwme/asmd-calc').AsmdCalc;

const calc = new AsmdCalc(0);
console.log(calc.add(0.1).add(0.2, 0.3));
// => 0.6

API

add(...args); - Addition
sub(...args); - Subtraction
mul(...args); - Multiplication
div(...args); - Division
keepDotLength(value, len, isRounding = false): number; - Keep N decimal places
toFixed(value, len): string; - Similar to Number.prototype.toFixed, but fixed precision of the result
getDecimalLen(num): number; - Get the decimal length
toNonExponential(num): string; - Convert to string format of unscientific counting method