I read a lot on https://www.regular-expressions.info and experimented on https://rubular.com since I was also learning Ruby at the time. https://regexr.com is another good tool that breaks down your regex and matches. One of the things I remember being difficult at the beginning was the subtle differences between implementations, like `^` meaning "beginning of line" in Ruby (and others) but meaning "beginning of... - Source: Hacker News / almost 2 years ago

As a ruby developer, I was happy to find that VS Code / TextMate grammar files use the same regular expression engine called Oniguruma as ruby itself. Thus, I could be sure that when trying my regular expressions in my favorite online regex tool, rubular.com, there would be no inconsistencies due to the engine inner workings. - Source: dev.to / over 2 years ago

In my testing on a couple of regex testers (https://rubular.com/ & https://regex101.com/) this seems to select the postcode correctly each time. Source: about 3 years ago

Copied from Rubular ( a nice tool to test regexes ):. Source: over 3 years ago

To add on to this from a regex perspective - I find regex to be invaluable in my workflows. Once you learn the basics I always test and debug my strings using https://rubular.com because it has string hints at the bottom that are readily available. Source: over 3 years ago

IDK if his Udemy course ("Spring Boot E-Commerce Ultimate Course") is relevant to what you are trying to learn, but I want to commend Nam Ha Minh as someone who has answered every question I asked about the course material within 24 hours. There aren't many teachers like that, it seems, so it seems worth praising those that do this. Maybe other teachers will feel more encouraged to follow suit if they see the... Source: about 4 years ago

From what I read, there are examples to work though, so you will get hands-on coding experience. Even more important, one review refers to the author replying to a reader with a question about one of the examples. Finding teachers that actually respond is rare, in my experience. I've only found one with such a commitment to his students, to date: Nam Ha Minh of the codejava website and author of a few udemy... Source: over 4 years ago

Of the various tutorial sites, I have found the content at codejava.net to be reliable and well written. The author doesn't just regurgitate documentation specs and examples, but puts time into creating additional, original examples that help clarify things. He has many tutorials that are Spring based. I don't know what books to recommend--I've been learning Spring most via tutorials and Udemy classes. Source: over 4 years ago

But after formation of my jar file, it is not running. I know that this is silly application but I am not getting why my application is not running. So can you look at my code and can give where I am making mistake. I am making some mistake in making jar file. I have taken part of code from codejava.net and so package name is I kept net.codejava.networking. Source: about 5 years ago