isEqual callback safety

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@ztimson/utils",
-	"version": "0.31.0",
+	"version": "0.31.1",
 	"description": "Utility library",
 	"author": "Zak Timson",
 	"license": "MIT",

src/objects.ts

@@ -255,7 +255,8 @@ export function includes(target: any, values: any, allowMissing = false): boolea
  * @param {string} [path] - Internal, current dot-path
  * @returns {boolean} True if they match
  */
-export function isEqual(a: any, b: any, compare?: string[] | ((key: string, a: any, b: any) => boolean | void), seen = new WeakMap<object, object>(), path = ''): boolean {
+export function isEqual(a: any, b: any, compare?: string[] | ((key: string, a: any, b: any) => boolean | void)): boolean {
+	const eq = (a: any, b: any, compare: any, seen: WeakMap<object, object>, path: string) => {
 		if(Array.isArray(compare)) {
 			if(compare.some(p => new RegExp(`^${p.replace(/[.+^${}()|[\]\\]/g, '\\$&').replace(/\*/g, '[^.]*')}(\\.|$)`).test(path))) return true;
 		} else if(typeof compare === 'function') {
@@ -275,16 +276,19 @@ export function isEqual(a: any, b: any, compare?: string[] | ((key: string, a: a
 		const isArrayA = Array.isArray(a), isArrayB = Array.isArray(b);
 		if(isArrayA && isArrayB) {
 			if(a.length !== b.length) return false;
-		for(let i = 0; i < a.length; i++) if(!isEqual(a[i], b[i], compare, seen, path ? `${path}.${i}` : `${i}`)) return false;
+			for(let i = 0; i < a.length; i++) if(!eq(a[i], b[i], compare, seen, path ? `${path}.${i}` : `${i}`)) return false;
 			return true;
 		}
 		if(isArrayA !== isArrayB) return false;
 		const keysA = Object.keys(a), keysB = Object.keys(b);
 		if(keysA.length !== keysB.length) return false;
 		for(const key of keysA) {
-		if(!Object.prototype.hasOwnProperty.call(b, key) || !isEqual(a[key], b[key], compare, seen, path ? `${path}.${key}` : key)) return false;
+			if(!Object.prototype.hasOwnProperty.call(b, key) || !eq(a[key], b[key], compare, seen, path ? `${path}.${key}` : key)) return false;
 		}
 		return true;
+	}
+
+	return eq(a, b, compare, new WeakMap(), '');
 }
 
 /**