课程: AWK Essential Training

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Solution: Print only those lines consisting of a complete HTML entity

Solution: Print only those lines consisting of a complete HTML entity - Linux教程

课程: AWK Essential Training

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Solution: Print only those lines consisting of a complete HTML entity

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(upbeat music) - [Instructor] The challenge in this case is to print from an HTML file only lines that consist of complete HTML entities, that is lines that begin with an HTML tag and end with the corresponding closing tag. This is one possible solution. In the begin section, we set the field separator to a regular expression which consists of a single character which is either an opening or a closing angle bracket. Let me show you the effect that this has on an HTML line. This line begins with the <li> and ends with the </li>. With the field separator, bracket, angle bracket, angle bracket, bracket which specifies a single character, which is either an opening or a closing angle bracket, the number of fields in this case is nine. The first one is an empty field which is the no characters that exist between the beginning of the line and the opening angle bracket. The second field is the li. The third field, this is a. Fourth…

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