suggestion: bail out of shallow comparison if either inputs are not o…

…f object type

src/__tests__/index.test.ts

@@ -147,11 +147,11 @@ describe("shallowEqual on mixed array/objects", () => {
 });
 
 describe("shallowEqual on primitive values of any type", () => {
-  it("should return false", () => {
+  it("should act correctly", () => {
     expect(shallowEqual<any>(1, 2)).toBe(false);
-    expect(shallowEqual<any>(1, 1)).toBe(false);
+    expect(shallowEqual<any>(1, 1)).toBe(true);
     expect(shallowEqual<any>("boris", "johnson")).toBe(false);
-    expect(shallowEqual<any>("boris", "boris")).toBe(false);
+    expect(shallowEqual<any>("boris", "boris")).toBe(true);
   });
 });
 
@@ -162,11 +162,11 @@ describe("shallowEqualObjects", () => {
     });
   });
 
-  it("should return false for primitive values of any type", () => {
+  it("should act correctly for primitive values of any type", () => {
     expect(shallowEqualObjects(1 as any, 2 as any)).toBe(false);
-    expect(shallowEqualObjects(1 as any, 1 as any)).toBe(false);
+    expect(shallowEqualObjects(1 as any, 1 as any)).toBe(true);
     expect(shallowEqualObjects("boris" as any, "johnson" as any)).toBe(false);
-    expect(shallowEqualObjects("boris" as any, "boris" as any)).toBe(false);
+    expect(shallowEqualObjects("boris" as any, "boris" as any)).toBe(true);
   });
 });
 
@@ -177,10 +177,10 @@ describe("shallowEqualArrays", () => {
     });
   });
 
-  it("should return false for primitive values of any type", () => {
+  it("should act correctly for primitive values of any type", () => {
     expect(shallowEqualArrays(1 as any, 2 as any)).toBe(false);
-    expect(shallowEqualArrays(1 as any, 1 as any)).toBe(false);
+    expect(shallowEqualArrays(1 as any, 1 as any)).toBe(true);
     expect(shallowEqualArrays("boris" as any, "johnson" as any)).toBe(false);
-    expect(shallowEqualArrays("boris" as any, "boris" as any)).toBe(false);
+    expect(shallowEqualArrays("boris" as any, "boris" as any)).toBe(true);
   });
 });

src/arrays.ts

@@ -12,6 +12,10 @@ export default function shallowEqualArrays(
     return false;
   }
 
+  if (typeof arrA !== "object" || typeof arrB !== "object") {
+    return false;
+  }
+
   const len = arrA.length;
 
   if (arrB.length !== len) {

src/objects.ts

@@ -12,6 +12,10 @@ export default function shallowEqualObjects<T>(
     return false;
   }
 
+  if (typeof objA !== "object" || typeof objB !== "object") {
+    return false;
+  }
+
   const aKeys = Object.keys(objA);
   const bKeys = Object.keys(objB);
   const len = aKeys.length;