深度複製一個數組對象

export function deepClone(source) {
  if (!source && typeof source !== 'object') {
    throw new Error('error arguments', 'shallowClone')
  }
  const targetObj = source.constructor === Array ? [] : {}
  Object.keys(source).forEach(keys => {
    if (source[keys] && typeof source[keys] === 'object') {
      targetObj[keys] = deepClone(source[keys])
    } else {
      targetObj[keys] = source[keys]
    }
  })
  return targetObj
}

export function deepClone2(source) {
  const targetObj = source.constructor === Array ? [] : {}; // 判斷複製的目標是數組還是對象
  for (const keys in source) { // 遍歷目標
    if (source.hasOwnProperty(keys)) {
      if (source[keys] && typeof source[keys] === 'object') { // 如果值是對象，就遞歸一下
        targetObj[keys] = source[keys].constructor === Array ? [] : {};
        targetObj[keys] = deepClone2(source[keys]);
      } else { // 如果不是，就直接賦值
        targetObj[keys] = source[keys];
      }
    }
  }
  return targetObj;
}