注意：生产代码可以处理对数组内不存在的属性的请求。

Note: Production code should handle requests for attributes that do not exist in the array.

youdao

不存在将连接保持在定制代码中的现成的方法。

There was no obvious way of keeping the connection persistent within custom code.

youdao

如何为尚不存在的代码编写测试呢？

How can you write a test for something that doesn't exist yet?

youdao

如果这些都不存在，推出自己的优化的代码。

If these don't exist, roll your own optimized code.

youdao

如果这些都不存在，推出自己的优化的代码。

If these don't exist, roll your own optimized code.

youdao