export function converObj(data: any) {
  let _result = [];
  for (let _key in data) {
      let v = data[_key];
      if (v.constructor === Array) {
          v.forEach(function(_value) {
              _result.push(`${_key}=${_value}`)
          });
      } else {
          _result.push(`${_key}=${v}`)
      }
  }
  return _result.join('&');
}