dropRightWhile (Lodash Compatibility)

Use dropRightWhile from es-toolkit

This dropRightWhile function operates slowly due to handling null or undefined, ArrayLike type processing, support for various predicate function formats, etc.

Instead, use the faster and more modern dropRightWhile from es-toolkit.

Removes elements from the end of an array based on a predicate function.

const result = dropRightWhile(array, predicate);

Reference

dropRightWhile(array, predicate)

Use dropRightWhile when you want to consecutively remove elements from the end of an array that satisfy a specific condition. Removal stops when the predicate function returns false.

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

// Using a function as a predicate.
const users = [
  { user: 'barney', active: true },
  { user: 'fred', active: false },
  { user: 'pebbles', active: false },
];

dropRightWhile(users, user => !user.active);
// Returns: [{ user: 'barney', active: true }]

// Matching with an object pattern.
dropRightWhile(users, { user: 'pebbles', active: false });
// Returns: [{ user: 'barney', active: true }, { user: 'fred', active: false }]

// Specifying property and value in array format.
dropRightWhile(users, ['active', false]);
// Returns: [{ user: 'barney', active: true }]

// Checking condition by property name.
dropRightWhile(users, 'active');
// Returns: [{ user: 'barney', active: true }, { user: 'fred', active: false }, { user: 'pebbles', active: false }]

null or undefined are treated as empty arrays.

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

dropRightWhile(null, x => x > 0); // []
dropRightWhile(undefined, x => x > 0); // []

Parameters

• array (ArrayLike<T> | null | undefined): The array to remove elements from.
• predicate (ListIteratee<T>, optional): The predicate function to apply to each element. Can accept a function, object pattern, array pattern, or property name.

Returns

(T[]): Returns a new array starting from the first element that does not satisfy the condition.