Parsing with Regular Expressions: A Minute to Learn, a Lifetime to MasterDaniel Zeman
Often working with content in the form of html, I have needed to manipulate the content intelligently. I accomplished this by using regular expressions to "parse" the html to find certain tags. This enabled me to look for certain tags with certain attributes, etc. This works well enough, bu...
Indeed, when colorizing code with simple(ish) regular expressions, you’ll run into annoying edge conditions like this one: Dim s as String s = "This is a string with ""quotes""" Or, let’s say we wanted to parse out HTML tags with this naive regular expression: <tag[^>]*>(.*?
I know, I know. We shouldnever parse HTML or XML with a Regular Expression. If you don't believe me, just take a moment to actually read that response. Yikes! Oh and you shouldn't validate emails with a Regular Expression. Oops. We're talking about at least two violations here. But...
There are some really good html parsers for ruby and python , but a quick google shows there to be a number of parsers for java as well. The benefit of these libraries is that you don't have to handle every edge case with regular expressions/they handle malformed html (both of which ...
Data parsing in Ruby can be tricky as it can be harder to find gems you can work with. Regular expression Now that you have an idea of what libraries are available for your web scraping and data parsing needs, let's address a common issue with HTML parsing, regular expressions. Sometimes...
Many of us have cobbled together a mishmash of regular expressions and substring operations to extract some sense out of a pile of text. The code was probably riddled with bugs and a beast to maintain. Writing a real parser—one with decent error handling, a coherent internal structure, and...
LTS provides five log structuring modes: regular expressions, JSON, delimiters, Nginx, and structuring templates. You can make your choice flexibly.Regular Expressions: This mode applies to scenarios where each line in the log text is a raw log event and each log event can be extracted into ...
Also, regular expressions are limited in what type of grammars they can parse (try parsing HTML with regexps), so at times you will need something more powerful.Enter leex and yeccErlang provides two modules that greatly simplify the task of writing lexers and parsers: leex and yecc. The ...
Emails generally come in plain text and HTML. Parsing HTML emails is a powerful way to get extra information to display in a different format and from various sources such as newsletters and transactional emails. Email specific data fields ...