Without a reference, you copy the entire array or hash onto the function call stack, and then copy it again in the function.

如果不使用引用，就需要将整个数组或 hash 表复制到该函数的调用栈中，然后在函数中再次对其进行复制。

youdao

This is the most flexible way to concatenate strings because you can use it to append just one string, a few strings at a time, or an entire array of strings.

这是连接字符串最灵活的方法，因为你可以用它追加一个字符串，或者一次追加几个字符串，或者一个完整的字符串数组。

youdao

The caller needs to wait until the method builds the entire array and returns. That induces a performance penalty when the directory happens to contain lots of files.

调用者需要等到方法构建好数组并返回后才能继续执行下面的代码，而一旦目录中含有大量文件时这么做的效率就很低下了。

youdao

It is only by adopting a macro perspective across the entire array of work to be done from the customer perspective that sensible decisions can be made.

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Going so small also leads to some truly uncommon rackmounting -- team lead Simon Cox and his son James grouped the entire array in two towers of Lego, which likely makes it the most adorable compute cluster you'll ever see.

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What if we were to build a solar array large enough to power the entire facility using these solar and land consumption numbers?

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