Show HN: Learn Regular Expressions with simple, interactive exercises

This was posted by a spam ring. The site has been submitted many times (<a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;from?site=regexone.com" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;from?site=regexone.com</a>).<p>Would you please stop this? You&#x27;re wasting your time. We ban these accounts and everything that you try to promote with them. Karma doesn&#x27;t help.

This is one of the best online learning experiences I&#x27;ve ever had. I went through it twice and never felt uncomfortable with regular expressions afterwards. The author also does this for SQL, which I haven&#x27;t tried: <a href="https:&#x2F;&#x2F;sqlbolt.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;sqlbolt.com&#x2F;</a><p>Are there any other online learning courses like this?

Also <a href="https:&#x2F;&#x2F;regexcrossword.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;regexcrossword.com&#x2F;</a><p>Very good practice to reinforce fundamentals after you&#x27;re done regexone

I recommend <a href="https:&#x2F;&#x2F;alf.nu&#x2F;RegexGolf" rel="nofollow">https:&#x2F;&#x2F;alf.nu&#x2F;RegexGolf</a> for timewasting

If this is your site, my feedback is, to have a more clear cut destinction between the explaination and the task at hand.

When you finish all the lessons, then you&#x27;ll have two problems.

Not to sound dismissive, but virtually everyone, who knows what are regular expressions, knows this. Only last, 15th, lesson starts to touch on things that are arguably not common knowledge - word boundaries and back references. Look aheads and look behinds, the parts which most people struggle with, aren&#x27;t covered at all.

I was going to post, &quot;that&#x27;s too bad, there&#x27;s already an excellent one out there.&quot; Yep, this is how I learned regex. In fact, I don&#x27;t even worry about forgetting regex, since 10 minutes on this and I have most of what I need.<p>Excellent, excellent website.

It&#x27;s a cool presentation. Careful, however, this only teaches a <i>specific</i> variant of regexes (the PCRE ones). Those are common, but expressions like &quot;\d&quot; won&#x27;t work in grep, sed, or many other tools. I wish it had noted the variances.

One mnemonic that stuck with me: you can remember the start and end characters (&#x2F;^foo$&#x2F;) by imagining an animal, like a rhino: the ^ is the horn at the front, the $ is the long curvy tail at the end.

Worth it, so you can fly in on a rope and save the day.<p><a href="https:&#x2F;&#x2F;xkcd.com&#x2F;208&#x2F;" rel="nofollow">https:&#x2F;&#x2F;xkcd.com&#x2F;208&#x2F;</a><p>(Yeah, I know you&#x27;ve seen it before. But 10,000 people&#x2F;day haven&#x27;t. <a href="https:&#x2F;&#x2F;xkcd.com&#x2F;1053&#x2F;" rel="nofollow">https:&#x2F;&#x2F;xkcd.com&#x2F;1053&#x2F;</a>)

You should fix the checker to match the whole strings, not just substrings. One can pass the following example with just \. : Match cat. Match 896. Match ?=+. Skip abc1

Thanks for sharing. Hope it helps some people out.<p>I took a look at it and have a small nitpick: you refer to the &#x27;\&#x27; character as &quot;slash&quot;. See Lesson 2 for example.<p>Cheers

I&#x27;m not a RegEx expert, but I&#x27;ve googled them enough to have the basics. This is exactly what I needed to improve my skills.

I just read <i>man re_format</i> but that&#x27;s a lot more fun

outstanding - I&#x27;ve struggled with regex, the capture group lesson was illuminating