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Category Archives: Regular Expression
Regex Hero: Free online regular expression tester
A regex tester is one of those tools developers often need. I used many different ones over the years and have never settled on one that I really like. I have seen some paid ones that looked promising but I … Continue reading
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Inline Regular Expression Options
I was using attributes from the System.ComponentModel.DataAnnotations namespace for model validation. This namespace includes a few very useful validation attributes such as Required Attribute – Validates the field has a va…
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Writing a Regular Expression parser in Haskell: Part 4
With the previous two modules in place we are now set up to use a DFA to match against a string. In my implementation I support either a greedy match or an short match. In a full featured regular expression … Continue reading
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Writing a Regular Expression parser in Haskell: Part 3
The third module in the simple regular expression parser is called: NFAtoDFA. Which as you might have guessed, takes the NFA that resulted from the first module and converts it into a DFA. The structure that the DFA uses is … Continue reading
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Writing a Regular Expression parser in Haskell: Part 2
The first module in my simple regular expression parse is called RegexToNFA. This module exposes the types that make up a finite state machine and also the functions to convert a regular expression string into a finite state machine. My … Continue reading
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