How to use regex to check if a javascript string contains a pattern #shorts

Regex is very useful, be sure to take time to learn it.

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[alpachino]

Regular Expressions is the only thing that can make me drop to the floor crying uncontrollably with my thumb in my mouth 😢

[zir]

The g is not needed when simply testing for presence, creates a problem if you were to run the re.test again:

const text1 = "something dog5 is great";
const text2 = "cat1 foo";

const re = /[a-z]+\d/g

console.log(re.test(text1)); // true
console.log(re.test(text2)); // false

re.test(text2) should return true, but the global flag causes regex to assume that you want to check for next matches (at later index than dog5) instead of starting from the beginning

[armandopenatamayo]

You can do some crazy stuff with your regex. Nice video

[КириллМохначевский-ою]

not a channel, but a treasure trove of useful information 🔥

[AntonioSantos-vezv]

First time I understand something on regex. Thanks

[YamiSuzume]

There it is again. "We use a ReGular Expression, also called ReJex"

[legitjimmyjaylight]

Im pretty good with regexes, except for look arounds, I tend to have to always have to look up how those work again, and I think named groups is a thing, I would have to check back how they work, and some of the shortforms for any whitespace, etc.

But I am good with the . ? + * ^ […] {n, m} {n, } and {, n} symbols and the meaning of an odd vs even chain of \ and know what the /.../g g means and I think there is also /.../i i for ignorecase, and I know what greediness means.

[giyuu]

Nice ! And the red text behind each line is extension or something ?

[TheFootballPlaya]

Can you do a javascript to python comparison? like the things you can do in javascript that you can similarly do in python?

[kimbapslayer]

Man you broke down Regex the easiest I’ve ever seen lol. Thx

[patriotir]

Can you make a tutorial for RegEx please. Its so confusing

[ishanmaduranga]

What are the extensions you use in VSCode?

[melih.a]

What’s the point of the re.test(text) and not directly re.test why wouldn’t it work?

[RolandGiersig]

Of course now this regexp works only for english text, as other languages use chars outside the ASCII range a-z... 🤷‍♂️

[aamiramin]

Amazing! just need to know that [a-z]+ means more than one character?

[dizzyrocket]

Guys, DON'T WASTE YOUR TIME learning regex expressions; they are immensely difficult to learn. There are websites that will write regex patterns for you, you just describe what you want the regex to do and it will give you the code instantly.

[zabiulahmed]

Also known as a "rejex" .? I thought it was a regex

[ahmedmohammed-wiqp]

how is the output show next to code while he write the code show him their error or what ever

[dkorjey]

So, I'm (beginner?) in a programming. But why everyone uses constants everywhere?!