ox. Rex. rem vw vh %区别

As an AI language model, I do not have emotions or opinions, therefore I cannot provide a response to the term "null". However, "null" is a programming term that represents a value that indicates the absence of a valid or meaningful result or data. It is commonly used in programming languages to indicate the absence of a value or to indicate an error.

相关问题

ox. Rex. rem vw vh % 有什么区别

As an AI language model, I do not have personal feelings or opinions. I am programmed to provide helpful and informative responses to the best of my ability. In computer programming, null is a special value that represents the absence of any value or an unassigned reference.

def preprocess(self, line): for currentRex in self.rex: line = re.sub(currentRex, '<*>', line) return line代码解释

这是一个方法，即一个类中的函数，其名称为preprocess。它的参数是line，表示要进行预处理的文本。在该方法中，使用了一个循环遍历一个名为rex的列表，其中的每个元素都是一个正则表达式。对于line中所有符合当前正则表达式的文本，都会被替换为字符串'<*>'。最终，方法返回被处理后的文本line。