float-compute-patch

float-compute-patch

patch v8 float compute lose precision

Translations

中文

useful if you

• your system has floating-point operations
• involve some amount calculation

install

npm install --save float-compute-patch

usage

// without patch 2.2+2.1 in v8 = 4.300000000000001. and so on,there are many problems
/*
***
  version 1.x
***
*/
// just execute once at your entry program for expample app.js
require('float-compute-patch');
// write like below
var result = 2.2.add(2.1); // = 4.3 or write like this (2.2).add(2.1)
// support chain write
var result = 2.2.add(2.1).sub(0.5).div(1).mul(2);
/*
***
  version 2.0.0
***
*/
// if you just want to add it to the Number prototype
require('float-compute-patch').patch(); // like the v1 version
// if you just want to use an ordinary function
var cal = require('float-compute-patch').cal;
// write like below
var result = cal(2.2).add(2.1).sub(8);

api

• mode of patch Number prototype, you should start with a number

  • add(number), addition
  • sub(number), subtraction
  • mul(number), multiplication
  • div(number), division

• mode of ordinary function, you should start with cal(number)

  • add(number), addition
  • sub(number), subtraction
  • mul(number), multiplication
  • div(number), division

test

npm run test