forOwnRight (Lodash compatibility)

Use Object.keys and loops

This forOwnRight function operates slowly due to internal calls to the keys function, object transformation processes, and reverse iteration.

Instead, use the faster and more modern Object.keys with loops.

Iterates over only own properties of an object in reverse order, calling a function for each property.

const result = forOwnRight(obj, iteratee);

Reference

forOwnRight(object, iteratee)

Iterates over only own properties of an object in reverse order, calling the iteratee function. It iterates only over properties directly owned by the object in reverse order, excluding inherited properties and Symbol keys. Since it collects keys into an array and then iterates in reverse order, it is slower than normal iteration. If the iteratee function returns false, iteration is stopped.

import { forOwnRight } from 'es-toolkit/compat';

// Iterate only own properties in reverse order
const obj = { a: 1, b: 2 };
forOwnRight(obj, (value, key) => {
  console.log(key, value);
});
// Output: 'b' 2, 'a' 1

// Iterate in reverse order excluding inherited properties
function Parent() {
  this.inherited = 'value';
}
Parent.prototype.protoProperty = 'proto';

const child = new Parent();
child.own = 'ownValue';

forOwnRight(child, (value, key) => {
  console.log(key, value);
});
// Output: 'own' 'ownValue', 'inherited' 'value' (protoProperty is excluded)

// Early termination based on condition
forOwnRight(obj, (value, key) => {
  console.log(key, value);
  return key !== 'a'; // Stop at 'a'
});
// Output: 'b' 2, 'a' 1

null or undefined is returned as is.

import { forOwnRight } from 'es-toolkit/compat';

forOwnRight(null, iteratee); // null
forOwnRight(undefined, iteratee); // undefined

Parameters

• object (T | null | undefined): The object to iterate over.
• iteratee ((value: T[keyof T], key: string, collection: T) => any, optional): The function to call for each property. Defaults to the identity function.

Returns

(T | null | undefined): Returns the original object.