From 9aec1bca17065dba8eb68b9d192803246565e633 Mon Sep 17 00:00:00 2001
From: Jos de Jong <wjosdejong@gmail.com>
Date: Thu, 22 Dec 2022 14:59:48 +0100
Subject: [PATCH] feat: implement function unequal

---
 src/numbers/relational.ts | 31 +++++++++++++++++++------------
 1 file changed, 19 insertions(+), 12 deletions(-)

diff --git a/src/numbers/relational.ts b/src/numbers/relational.ts
index cd0a418..b5285c6 100644
--- a/src/numbers/relational.ts
+++ b/src/numbers/relational.ts
@@ -1,27 +1,34 @@
-import {configDependency} from '../core/Config.js'
-import {Signature, ImpType} from '../core/Dispatcher.js'
+import { configDependency } from '../core/Config.js'
+import { Signature, ImpType, Dependency } from '../core/Dispatcher.js'
 
 const DBL_EPSILON = Number.EPSILON || 2.2204460492503130808472633361816E-16
 
 declare module "./type" {
    interface NumbersReturn<Params> {
       equal: Signature<Params, [number, number], boolean>
+      unequal: Signature<Params, [number, number], boolean>
    }
 }
 
 export const equal =
    (dep: configDependency): ImpType<'equal', [number, number]> =>
-   (x, y) => {
-      const eps = dep.config.epsilon
-      if (eps === null || eps === undefined) return x === y
-      if (x === y) return true
-      if (isNaN(x) || isNaN(y)) return false
+      (x, y) => {
+         const eps = dep.config.epsilon
+         if (eps === null || eps === undefined) return x === y
+         if (x === y) return true
+         if (isNaN(x) || isNaN(y)) return false
 
-      if (isFinite(x) && isFinite(y)) {
-         const diff = Math.abs(x - y)
-         if (diff < DBL_EPSILON) return true
-         return diff <= Math.max(Math.abs(x), Math.abs(y)) * eps
+         if (isFinite(x) && isFinite(y)) {
+            const diff = Math.abs(x - y)
+            if (diff < DBL_EPSILON) return true
+            return diff <= Math.max(Math.abs(x), Math.abs(y)) * eps
+         }
+
+         return false
       }
 
-      return false
+export const unequal = (dep: Dependency<'equal', [number, number]>):
+   ImpType<'unequal', [number, number]> =>
+   (x, y) => {
+      return !dep.equal(x, y)
    }