feat(micro-dash): reduce size of functions()

projects/micro-dash/src/lib/object/functions.ts

@@ -1,17 +1,17 @@
-import { isFunction, keys } from '../../public-api';
+import { isFunction } from '../../public-api';
 import { StringifiedKey } from '../interfaces';
 
 /**
  * Creates an array of function property names from own enumerable properties of `object`.
  *
  * Contribution to minified bundle size, when it is the only function imported:
  * - Lodash: 3,504 bytes
- * - Micro-dash: 310 bytes
+ * - Micro-dash: 143 bytes
  */
 export function functions<T extends object>(obj: T): Array<StringifiedKey<T>> {
-  return keys(obj).filter(
+  return Object.getOwnPropertyNames(obj).filter(
     (key) =>
       key !== 'constructor' &&
-      isFunction(Object.getOwnPropertyDescriptor(obj, key)?.value),
-  );
+      isFunction(Object.getOwnPropertyDescriptor(obj, key)!.value),
+  ) as Array<StringifiedKey<T>>;
 }

projects/micro-dash/src/lib/object/keys.ts

@@ -8,7 +8,7 @@ import { Nil, StringifiedKey } from '../interfaces';
  *
  * Contribution to minified bundle size, when it is the only function imported:
  * - Lodash: 3,326 bytes
- * - Micro-dash: 148 bytes
+ * - Micro-dash: 135 bytes
  */
 
 export function keys<T>(object: T | Nil): Array<StringifiedKey<T>> {
@@ -21,9 +21,5 @@ export function keys<T>(object: T | Nil): Array<StringifiedKey<T>> {
 
 /** @hidden */
 export function keysOfNonArray<T>(object: T | Nil): Array<StringifiedKey<T>> {
-  let val: string[] = [];
-  if (object) {
-    val = Object.getOwnPropertyNames(object);
-  }
-  return val as any;
+  return object ? (Object.getOwnPropertyNames(object) as any) : [];
 }