JS 常用方法 -- 生成随机数、深拷贝

//生成随机数
export const getUUID = function (len) {
  len = len || 6;
  len = parseInt(len, 10);
  len = isNaN(len) ? 6 : len;
  var seed = "0123456789abcdefghijklmnopqrstubwxyzABCEDFGHIJKLMNOPQRSTUVWXYZ";
  var seedLen = seed.length - 1;
  var uuid = "";
  while (len--) {
    uuid += seed[Math.round(Math.random() * seedLen)];
  }
  return uuid;
};

//深拷贝
export const deepcopy = function (source) {
  if (!source) {
    return source;
  }
  let sourceCopy = source instanceof Array ? [] : {};
  for (let item in source) {
    sourceCopy[item] = typeof source[item] === 'object' ? deepcopy(source[item]) : source[item];
  }
  return sourceCopy;
};