lazarljubenovic / epsicheck

A set of functions for comparing floating point numbers.

epsicheck

Five simple utilities for comparing two floating point numbers, each with a short alias:

• equal or eq,
• lessThan or lt,
• lessThanOrEqual or lte,
• greaterThan or gt, and
• greaterThanOrEqual or gte.

The default epsilon is 1e-6 and can be customized using the third parameter.

Functions Overview

a, b	eq(a, b)	lt(a, b)	lte(a, b)	gt(a, b)	gte(a, b)
1, 2		✅	✅
1, 1 + 1e-5		✅	✅
1, 1 + 1e-7	✅		✅		✅
1, 1	✅		✅		✅
1 + 1e-7, 1	✅		✅		✅
1 + 1e-5, 1				✅	✅
2, 1				✅	✅

The above table is assuming the default epsilon of 1e-6.

Installation & Usage

$ npm i epsicheck

import { eq } from 'epsicheck'

console.assert(eq(0.1 + 0.2, 0.3))
console.assert(0.1 + 0.2 != 0.3)