/**
 * this util module is about to provide array related utils
 * @module angle-util/arrayUtil
 */
export interface AnyObject {
  [propName: string]: any
}

function deepCopy (original: Array<any>): Array<any>
function deepCopy (original: AnyObject): AnyObject
function deepCopy (original: any): any
function deepCopy (original: Array<any> | AnyObject | any): Array<any> | AnyObject | any {
  if (Array.isArray(original)) {
    return original.map(elem => deepCopy(elem))
  } else if (typeof original === 'object' && original !== null) {
    return (<any>Object).fromEntries(
      (<any>Object).entries(original)
        .map(([k, v]) => [k, deepCopy(v)]))
  } else {
    // Primitive value: atomic, no need to copy
    return original
  }
}
export default {
  // 深拷贝 NOTE 相较简单的JSON hack拥有更好的性能
  deepCopy
}