import { ObjectEntry } from "../types";
export declare function without<T extends Record<string, unknown>>(obj: T, items: (keyof T)[]): Omit<T, any>;
export declare function deepEqual<T>(objA: T, objB: T): boolean;
export declare function deepCopy<T>(source: T): T;
export declare function getOrSetProperty<S, T extends keyof S>(obj: S, index: T, value: S[T]): S[T];
export declare function getObjectEntries<T extends Record<string, unknown>>(obj: T): ObjectEntry<T>[];
export declare function getNestedProperty(object: any, propertyPath: string | string[], separator?: string): any;
export declare function setNestedProperty<T>(item: any, key: string | string[], value: T): void;
export declare function createMergedObject<T>(source: T, ...updates: Partial<T>[]): T;
export declare function roughSizeOfObject<T>(object: T): number;
/**
 * Freeze object recursively
 *
 * @param o - object to be freeze
 */
export declare function deepFreeze<T>(o: T): T;
/**
 * @deprecated use {@link Object.keys(object).length}
 */
export declare function size<T extends (Record<string, unknown> | unknown[])>(object: T): number;
export declare function isPlain<T extends Record<string, unknown>>(object: T): boolean;
export declare function toBoolean<T>(value: T): boolean;
export declare function isNotInstance<T extends Record<string, unknown>>(value: T): boolean;
/**
 *
 * @param list - data-structures to flat
 * @param propertyPath - path to property
 * @param separator - separator in propertyPath
 * @param skipUndefined - true if undefined should be skipped
 *
 * @example
 * ```
 * const items = [
 *    {
 *        person: {
 *            name: "Gabriel"
 *        }
 *    },
 *    {
 *        person: {
 *            name: "Ella"
 *        }
 *    },
 *    {
 *        person: {
 *            name: "Gabriel"
 *        }
 *    },
 *    {
 *        person: {
 *            name: "Joe"
 *        }
 *    }
 * ]
 *
 * console.log(makeFlat(items), "person.name");
 * // ["Gabriel", "Ella", "Gabriel", "Joe"]
 * console.log(makeFlat(items), "person_name", "_");
 * // ["Gabriel", "Ella", "Gabriel", "Joe"]
 * console.log(makeFlat(items), "person.name", ".", true);
 * // ["Gabriel", "Ella", "Joe"]
 * ```
 */
export declare function makeFlat<T>(list: T[], propertyPath: string, separator?: string, skipUndefined?: boolean): T[];
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