- Regular Expression is hard to read
Example: ^([a-zA-Z0-9_\-\.]+)@([a-zA-Z0-9_\-\.]+)\.([a-zA-Z]{2,5})$
- Regular Expression is hard to write (maintain)
- Regular Expression provides several ways to do the same thing
Example: \d, [0-9], \p{Nd}
- Regular Expression is error-prone and hard to spot the mistake (because it's a plain string)
Example: You miss a )
Assume we want to extract two pieces of information (zip code and phone) from a string.
The left image is the piece of code we usually end up with.
The right image is the code that does the same but it more readable:
