XPath表达式允许您在文档中定义一个节点关系集，并允许根据这些关系从文档返回内容的子集。
An XPath expression allows you to define a set of node relationships in the document and return subsets of content from the document based on these relationships.
定义一个map函数实际上只是一个关于确定您从即将输入的文本行中捕获什么内容的问题。
Defining a map function is thus really just a matter of determining what you want to grab from an incoming line of text.
定义一个map函数实际上只是一个关于确定您从即将输入的文本行中捕获什么内容的问题。
Defining a map function is thus really just a matter of determining what you want to grab from an incoming line of text.
应用推荐