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  1. Practice
  2. Regex
  3. Introduction
  4. Matching Digits & Non-Digit Characters
  5. Discussions

Matching Digits & Non-Digit Characters

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  • njonjiop + 1 comment

    The regex should imho start with ^ and end with a $, however this is not accepted. This seems contradictory in comparison with the previous question where it was required.

    • tonghe + 0 comments

      I used ^ and $ just as last question required. And it was wrong. The test cases are not consistent. Really confusing.

  • menafgul + 5 comments

    testcase#4 for javascript is this "10a10.2015452254" and expects "true". this should be fixed.

    • k_pawlowski + 0 comments

      I had the same problem. Solution was not to use ^$ as it was needed in the previous one example...

    • dicky_dicky + 1 comment

      yes, test case 4 is broken :(

      • pratik9044536615 + 1 comment

        Yup for the last part check for atleast 4 digits i.e. minimum 4 and max can be any

        • 191997mahesh + 0 comments

          if use ^ and $ then it will restrict to 4 digits, so the case goes wrong, without them the case will pass

    • quixrick + 0 comments

      Yeah, I used the ^, but could not use the $ as it would fail. If it said that it could be an arbitrary number of digits, instead of xxXxxXxxxx, then it would have made more sense.

    • ganjash + 0 comments

      ya, this should be fixed. It should false.

    • minatocool20119 + 0 comments

      (\d{2}\D){2}\d{4} because "a" and "." are character xxXxxXxxxx

  • vishal_chitnis + 1 comment

    It's easier to group digits like \d{2} rather than \d\d

    • Nandhinime + 0 comments

      Any thoughts on why \d+ does not work

  • canuzzi + 1 comment

    This worked for me: (\d{2}\D){2}\d{4}

    • lamvann + 0 comments

      good eye

  • britojr + 0 comments

    This is annoying: I got WA on previous challenge because I didn't use ^ and $ for begin and end of the expression.

    But in this one I got WA because I used those.

    So, it's never clear if the expression should or shouldn't accept strings that have something exra after the match

  • zhanyu_wang + 0 comments

    It's confusing when in the problem "Matching Anything But a Newline" we have to use "^" and "$" but now we should not.

  • mkhanw01 + 0 comments

    (\d{2}\D){2}\d{4}

  • zhangyan8806 + 1 comment

    This is one of ways by using Java. tester.checker("(?:\d{2}\D){2}\d{4}");

    • animesh2712 + 0 comments

      Can you please add explanation?

  • simonjanes + 0 comments

    Serious question: Why are there even "hidden test cases" that need to be unlocked by spending "Hackos?"

    In "real world" programming, if a test case fails, it shows you why it failed so that you can understand the problem.

    Is this merely a case of gamification run amok? Would you tolerate a unit testing suite that held back your failing test results for a small amount ransom paid in Bitcoin?

  • am_pra_veen + 0 comments

    /\d{2}\D\d{2}\D(\d{4,10})+$/ This regexp pass all cases

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