# 2018-每周补脑46th

Posted by XiLock on November 10, 2018

### Latex

If such a space should be kept even if it falls at the end or the start of a line, use \hspace* instead.

If the space should be preserved at the top or at the bottom of a page, use the starred version of the command, \vspace*, instead of \vspace. If you want to add space at the beginning of the document, without anything else written before, then you may use.

{ \vspace*{length} }


It’s important you use the \vspace* command instead of \vspace, otherwise LaTeX can silently ignore the extra space.

Hypertext Help with LaTeX:Spaces and Boxes

### Network

API（Application Programming Interface,应用程序编程接口）是一种不需要理解基层代码就能调用程序的接口（Interface），参考