Why Regex() may not work?

Question

I have var chekB = new Regex(@"\w+[k]\b"); and it can't find anything from sentence "I had to kill Frank. Crank". It was just a sentence. So why?

Answer 1

Dead Lord
Add this to the top:
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using System.Text.RegularExpressions;
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Change your foreach to this:
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foreach (var matchB in chekB.Matches(sent)) {
Console.WriteLine(matchB);
}
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Remove or comment this line, because there isn't a console to read key from on SoloLearn:
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Console.ReadKey();
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And remove the crude language in your code. It's just weird.

BTW... If you review my code sample, you will see another option for doing this.

Answer 2

Send the link from Regex101.com and a link in Code Playground

Answer 3

Dead Lord

See if these codes help you with your issue.

https://regex101.com/r/TMfmot/1

https://code.sololearn.com/c6C913OMYnNF/

Answer 4

Groups refer to the sub-matches identified using the parentheses.

Your RegEx pattern contains the grouping between the \b word boundaries.

Answer 5

It works on regex101.com

Answer 6

David Carroll ty. Later this night I will send it to you

Answer 7

Dead Lord Let me know if you have any questions on this.

Answer 8

David Carroll code: https://code.sololearn.com/cfm5mBQf41PC/?ref=app
Regex101 link:
https://regex101.com/r/oZj12i/1

Answer 9

David Carroll ok. Thank you!

Answer 10

Eah, that works. But can you tell me why does this works out?
var chekA = new Regex(@"\b([a-z]{1,4})\b", RegexOptions.IgnoreCase);

Console.WriteLine("a) Вывести только те слова, которые содержат не более 4х букв;");

foreach (Match matchA in chekA.Matches(sent))
{
Console.WriteLine(matchA.Groups[1].Value);
}

Answer 11

Actually I want to know why do I need write [1] here:
matchA.Groups[1].Value