type IObject = {
    [key: string]: any;
    [key: number]: any;
};

/**
 * @description: 数据类型精准判断
 * @param {*} keyVal 要判断的数据
 * @return {*} 类型名称的字符串（小写）： number、string、boolean、null、undefined、object、symbol...
 */
declare function typeOf(keyVal: any): string;
declare function S4(): symbol;
declare function getUUID(prefix?: string): string;
declare function cloneDeep(value: any): never;
/**
 * @description: 也为深拷贝，数组的额外值也能被拷贝，列：[1, ids: Symbol(13359)],可以拷贝出数组中的Symbol
 * @param {*} obj 需要进行拷贝的数据
 * @return {*} 深拷贝完成后的数据
 */
declare function deepCopy(obj: any): any;

type fnType$1 = (item: IObject, key: any, parent: IObject | null, level: number) => void;
/**
 * @description: 像遍历数组一样遍历集合对象，遍历集合对象(像es6的forEach一样不能停止)
 * @param {*} obj 查找的源对象
 * @param {*} fn(value,key,parent,level)：回调函数；value: 遍历到的当前value值，key: 遍历到的当前key，parent: 遍历到的当前对象，level: 遍历源对象的当前层级，开始为0
 * @return {*} 经过操作后的obj对象
 */
declare function forEach(obj: IObject, fn: fnType$1): IObject;

declare const findOwn: (obj: IObject, second: any, third?: number | string, fourth?: number) => any;
declare const findParent: (obj: IObject, second: any, third?: number | string, fourth?: number) => any;
declare const findParents: (obj: IObject, second: any, third?: number | string, fourth?: number) => any;
declare const find: (obj: IObject, second: any, third?: number | string, fourth?: number) => any;

type assignType = {
    (...param: any[]): void;
    empty: Symbol;
    end: Symbol;
    delete: Symbol;
};
declare const assign: assignType;

type fnType = (arg0: ({
    status: ('before' | 'after');
    value: any;
    key: any;
    parent: any;
    level: number;
    parents: any[];
}), arg1: Symbol, arg2: Symbol) => (symbol | any);
declare function mapFilter(obj: IObject, fn: fnType): any;

export { S4, assign, cloneDeep, deepCopy, find, findOwn, findParent, findParents, forEach, getUUID, mapFilter, typeOf };