/**
 *
 * 使用方法与object.assign一样，差别在于
 *
 *  Object.assign({a:1},{a:undefined}) === {a:undefined}
 *
 *  assignObject({a:1},{a:undefined}) === {a:1}
 *
 * 会忽略掉里面的undefined
 *
 *  当最后一参数是函数时传入(key)=>boolean，表示只有返回true时才会覆盖
 *
 
 *

 *
 */
declare function assignObject<T extends Record<any, any> = Record<any, any>>(target: object, ...sources: any[]): T;

export { assignObject };