6 kyu

Statistics for an Athletic Association

299 of 10,913g964
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Fundamentals
Strings
Statistics
Mathematics
Data Science
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  • yoorque Avatar

    My solution works but Codewars Environment throws and error. "solution.swift:23:31: error: value of type 'Duration' has no member 'formatted'".

    Duration does have the 'formatted()' method.

  • ultra_seducer_0 Avatar

    I want to ask about at least first example of test-case, for understanding, cause I can't take it. We have the array: "01|15|59, 1|47|16, 01|17|20, 1|32|34, 2|17|17", where the result is: "Range: 01|01|18 Average: 01|38|05 Median: 01|32|34". If we calculate the seconds range and we have maximum digit 59 and minimum digit 16, the seconds range must be equal to 43 (59 - 17), but in answers we have 18. How can we get range 18? Where did we get it from and why it doesn't equal to 43? Same question for minutes range. If we take minutes average: 15+47+17+32+17=128, then we divide it by 5(as we have 5 numbers here) and get average 25, but according to the tests answer it must be 38, but why? And I'm not sure about median where I used module 'statistics' and got "1|17|20" but the test is saying that it must be 01|32|34, as we have minute list [15, 17, 17, 32, 47] - median 17, and seconds list [16, 17, 20, 34, 59] - median 20. Can it be some mess with answers or else? thx

  • Christian510 Avatar

    I enjoyed this problem. I love working working with time values. I few iterations and I was able to solve this. I have to be honest though. I used Bard AI a few times just so I didn't have to scroll through MDN a bunch. I wonder if time to solve these problems has steadily improved on average since AI became prominent.

  • AlbertCarri Avatar

    Before a lot of testing I made it!!!. Instructions al not clear. When the function recibe '' or 'you will return' or any text characters then return ''

  • miggycoder Avatar

    My python code for this kata is 100% best practice fr fr

    (hint: its 113 lines long with janky code)

  • mawh Avatar

    Can ye chuck a bit of markdown around the "" empty strings in If the given string is "" you will return "" so that it doesn't read like some accidentally escaped version of the phrase 'If the given string is "you will return"' ?

  • saudiGuy Avatar

    python new test framework is required. updated in this fork

  • AbuPython Avatar

    I managed to pass the test but my statistics are slightly off by one for Averages and Medians in some of the 'Attempt' tests. Any tips on how to approach? My function converts the time strings to one unit before I work out the stats, I am a beginner by the way (Python)

  • normnXT Avatar

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  • psaikido Avatar

    I see my c solution crashing the test with "Test Crashed Caught unexpected signal: SIGSEGV (11). Invalid memory access." but I'm not seeing why. Any help please?

  • Rasgul Avatar

    #Nice one, but at least 5kyu :)

  • trashy_incel Avatar

    C fork:

    • removing the reference solution from preloaded
    • proper assertion messages
    • input string const-qualified (fixes this issue)
    • initial code no longer crashes
    • it is explained what kind of pointer to return
    • backwards-compatible
  • ejini战神 Avatar

    C#: method name should be PascalCase (Please refer to implementation of backward compatibility here )

  • jessica.lelis01@gmail.com Avatar

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  • R.Daneel.Olivaw Avatar

    I completely loved this!!!! It was like blueberries to my brain, Thanks!!!!!

  • worox780 Avatar

    I think there are some problems with the explanation of the median and the response of the median in this Kata. I can't pass because of this problem. Their explanation is correct but their result is wrong. Correct?

  • MaxBrokenSpace Avatar

    This is a good kata! But I think it's at least a 5 kyu level.

  • nomennescio Avatar

    C translation has signature char* stat(char* strg);, whereas strg is actual a const char*, and cannot be modified. It would also be nice to mention in the initial solution that the result needs to be allocated and will be freed.

  • SeregaIlyakov Avatar

    g964, very nice kata and very nice description here. Thank you!

  • jOtar0 Avatar

    hello; i have a question because the instructions was poor and didn't explain a lot ..

    when the input was: "01|15|59, 1|47|16, 01|17|20, 1|32|34, 2|17|17"

    the output was: "Range: 01|01|18 Average: 01|38|05 Median: 01|32|34"

    when i did the math to count the range in the coulmn of minute it was like this (47-32=15) why in the output was (01) did I miss something ??

  • tolgaersoy Avatar

    The description is really bad. I read the description several times. But I don't understand it. It gave range , average , median calculate methods . But it isn't telling how can I calculte the range,average,median on the gaven string.

    "01|15|59, 01|47|16, 01|17|20, 01|32|34, 02|17|17"

As understand it.
The range of minutes is under there.
Max minutes: 47
Min minutes: 15
Range of minutes: 47-15=32
I calculated range of minutes is 32.

But it isn't 32. It is 01 by the answer.
  • France3 Avatar

    I have 80% of the time an error with the random tests. Is there a way to see the test that failed?

  • BlockchainEnthusiast Avatar

    I get everything right except for the average, which is only slightly off: 01|35|57 vs 01|38|05 in the first case and 02|26|42 vs 02|26|18 in the second case. What could be the cause?

  • mbeddedher Avatar

    Log

    Range: 01|01|18 Average: 01|38|05 Median: 01|32|34

    None should equal 'Range: 01|01|18 Average: 01|38|05 Median: 01|32|34'

    All tests are like this.(python) Am I missing something?

  • vailcolorado13 Avatar

    this one only took me 2 million lines of code to solve!

  • scottrdee Avatar

    This was a heck of a lot of fun. Those tests made me refine my code! Gotta love unexpected results.

  • ejini战神 Avatar

    • JS node 18. (mocha + chai) should be enabled

    • Python new test framework should be used

    • Ruby 3.0 should be enabled

  • ejini战神 Avatar

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  • ejini战神 Avatar

    Empty strings are not tested in some languages

  • timeuss Avatar

    Nice Kata! I learn some good things :) Thx to the author.

  • adilakothiat Avatar

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  • DTLearn Avatar

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  • ezenoese Avatar

    To calculate the average it says to add the 'numbers' to a set, but if you do, it will fail. Just leave it as it is.

  • elmofre Avatar

    mine result and answer the same, but happen mistake: Test Results: Range: 01|01|18 Average: 01|38|05 Median: 01|32|34 None should equal 'Range: 01|01|18 Average: 01|38|05 Median: 01|32|34'

  • Grovre Avatar

    Very poorly explained

  • professor_G Avatar

    The requirements are not explained well, especially the way the NAs would be represented in the input and how they should impact the output. It is impossible to review the failed tests' definition, so good luck figuring out what the author expected the function to do.

  • free2create Avatar

    ATTEMPT fails but TEST passes! Also I ran the ATTEMPT tests locally and they passed!

    This seems like a codewars environment issue!

  • Babayaga-cell Avatar

    The only problem I am trying to solve is how can I throw the parseException on the test cases for attempt?

  • Mickey Mouse 2048 Avatar

    Good kata I liked this

  • mohammad-amin-safaei Avatar

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  • Intothevoid Avatar

    Nice kata, enjoyed every moment solving it.

  • Arsenator Avatar

    Passed it after many tries lol.. who is lying, the random test or statistic.median...?

  • Kilo-zolo Avatar

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  • phodye Avatar

    This was difficult but excellent! Thanks for putting it together

  • Babs1987 Avatar

    very cool kata, i think it have to be a 5 kyu

  • VladLozynskyi Avatar

    Please, add check for empty string to test cases (Ruby).

  • gaborio Avatar

    Another great kata from g964, thanks!

  • conconTheCoder Avatar

    For the first test case that has 5 terms, I am getting different answers to the 2nd and 3rd median values. It looks like the second median is 32, and the third median is 34, which is the 4th terms in each of their lists. Shouldn't the median be the 3rd sorted term in a 5 term list?

  • HaukeSL Avatar

    The description needs to include that there can be more or less than 5 runners. Else a lot of fun!

  • VaxiZ Avatar

    It was good kata. For these that didn't complete yet, remember that string can be empty :>

  • ssshupe Avatar

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  • zellko Avatar

    Quite long Kata for a JS begginer, but very nice. Good revsion of of array method.

    Thank you!

  • OriginalDoug Avatar

    Working on this in swift, works correctly in my Xcode playground but I'm getting this error here:

    solution.swift:18:25: error: 'DateComponentsFormatter' is unavailable: Not supported in swift-corelibs-foundation
        let formatter = DateComponentsFormatter()
                        ^~~~~~~~~~~~~~~~~~~~~~~
Foundation.DateComponentsFormatter:2:12: note: 'DateComponentsFormatter' has been explicitly marked unavailable here
open class DateComponentsFormatter : Formatter

    So did the creator really just say "nope they can't use this already built in tool that would be perfect for this"??

    Or am I missing something? I've imported Foundation at the top of my code but that didn't help...

  • sberthouzoz Avatar

    "Substrings in the input string are separated by , or ,." as per description. But there is no test case for that in kotlin, no test with an input string without whitespace like "01|15|59,1|47|16,01|17|20,1|32|34,2|17|17"

  • depial Avatar

    I get the following error in Julia for both tests and attempts:

    ERROR: LoadError: LoadError: UndefVarError: stati not defined

    Looks like the test setup since there is a stati there

    facts("stat") do

    function testing(s, expect)
        actual = stati(s)
        ...

    and the test area is outlined in red after any attempt.

  • fulerent Avatar

    This is amazing kate. I have finished and I'm happy. I had a problem - I used a name of function of Python dictonary.

  • mokuj1n Avatar

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  • ByteEater Avatar

    There are no traps in this format.

    But there is! The separator between results isn't described, so has to be inferred from the example, where it's always , . But in one of the tests it's just ,.

  • MikoFrosty Avatar

    I feel as though this was more of a level 5 Kata than a 6 when considering the uptick in time commitment to work through each part of the problem.

  • user6911222 Avatar

    Excellent Kata. I suggest one does https://www.codewars.com/kata/52685f7382004e774f0001f7/ first as a warmup to this kata.

  • ChrisMassie Avatar

    "01|15|59, 1|47|6, 01|17|20, 1|32|34, 2|3|17"

    The description suggests that times in the strings provided are separated by ", ", they're actually separated by ",".

  • user5329419 Avatar

    Nice Kata!!!

  • kue_pancake Avatar

    holly frik lots of people solve it with so simple and clean code. feels so dumb :(

  • Ring2020 Avatar

    This is just my personal opinion. First of all this question is very impressed to be honest. But one thing that myself have been struggling with is about the format of the datetime.

    Most of the time second will up or down 1 second at the random test cases. I think it would be nicer and more beginner friendly to have a format guildlines. (I guess that is what you called it.)

    Because it yields the result differently on the different method

    1. library time
    2. library datetime
    3. divmod
    4. %

    For further improvement! Hope that helps!

  • manar446 Avatar

    can anyone explain the explanation to me (i didnt quite got it)

    their example input was "01|15|59, 1|47|6, 01|17|20, 1|32|34, 2|3|17" and answer is "Range: 00|47|18 Average: 01|35|15 Median: 01|32|34"

    now when they say average does it mean average for every seconds,hour,min ex for min (15+47+17+32+2)/5 so average for min=56.5 but here its 35 (Average: 01|35|15)

    for median its the middle term of the set so for median of minute it should be 17 becoz arranging in ascending order the minutes=[3 15 17 32 47] so the middle term for minute is 17 not 32

  • AFSAK Avatar

    can anyone explain the explanation to me (i didnt quite got it)

    their example input was "01|15|59, 1|47|6, 01|17|20, 1|32|34, 2|3|17" and answer is "Range: 00|47|18 Average: 01|35|15 Median: 01|32|34"

    now when they say average does it mean average for every seconds,hour,min ex for min (15+47+17+32+2)/5 so average for min=56.5 but here its 35 (Average: 01|35|15)

    for median its the middle term of the set so for median of minute it should be 17 becoz arranging in ascending order the minutes=[3 15 17 32 47] so the middle term for minute is 17 not 32

    (Median: 01|32|34")

  • dithpri Avatar

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  • Bahar67 Avatar

    In the instruction is said: Each part of the string is of the form: h|m|s where h, m, s (h for hour, m for minutes, s for seconds) are positive or null integer (represented as strings) with one or two digits. There are no traps in this format.

    Here are strings that I am getting for attemps: Log 01|15|59, 1|47|16, 01|17|20, 1|32|34, 2|17|1702|15|59, 2|47|16, 02|17|20, 2|32|34, 2|17|17, 2|22|00, 2|31|4102|15|59, 2|47|16, 02|17|20, 2|32|34, 2|32|34, 2|17|17

    Can anyone says what are 2|17|1702|15|59, and 2|31|4102|15|59,? These are not in order and causing wrong results.

  • FArekkusu Avatar

    C version generates warnings.

  • acam Avatar

    Just spent 3 days on this problem and haven't got a solution until now. This is good but heart breaking at some point...

  • Luksonaッ Avatar

    very,very very fun one! loved it.

  • immasuk Avatar

    Some of the "Attempt" test cases pass an empty string to the function, it seems, which can cause problems with trying to do maths on them or casting them to numbers. You can just skip these strings and it seems to work fine (or it did for me!)

  • Ciprian Amza Avatar

    Nice kata!

  • CrazyMonkey333 Avatar

    ValueError: invalid literal for int() with base 10

    I pass the test but on the attempts after I pass a few random tests I get this error. It seems that one of the entries has an non-intiger in it or my code isnt up to par yet. Been driving me a little cookoo trying to figure it out.

  • hodgesb Avatar

    I love katas like this to start my work day. It is not too tough but forces you to exercise multiple coding skills that are not too esoteric to apply in the course of normal technical delivery.

  • Moombai Avatar

    A lot of work for 6kyu but fun still.

  • michan9 Avatar

    God, this one was very fun!

  • HonZaTri Avatar

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  • imjasonmiller Avatar

    I've forked the Rust translation in order to update it to Rust 1.49 and updated rand::Rng::gen_range to its new signature that takes a std::ops::Range.

  • Aisaac25 Avatar

    Hello, I'm stuck with the tests too, I think I'm understanding the problem in the wrong way but here's my question anyway:

    From your example on the problem's description, How do you get a range of 00 for a set of {01,01,01,01,02} hours, isn't it supposed to be 01 (highest:02 - lowest:01)? "01|15|59, 1|47|6, 01|17|20, 1|32|34, 2|3|17"

    "Range: 00|47|18 Average: 01|35|15 Median: 01|32|34"

    From how I understand the problem, to get a range of 00 you'd need to have a full set of runners taking 2 hours min each.

    I have kind of the same question for everything else (all tests), I'm getting all the tests wrong but I think my solution is right, at least for the description I understood.

    It's been a really fun and refreshing kata aside from that issue.

  • Ivan-Shestakov Avatar

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  • IT-Knight Avatar

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  • ravonos Avatar

    Maybe I'm just dumb but I think the description of this kata really threw me off. I thought they wanted specifically the lowest/highest of each category in hours/mins/secs, not the lowest/highest overall times. I had to look at the solutions to find out that the way that makes sense in the real world is the answer they wanted, which was not apparent to me from the description.

  • slimTT Avatar

    So... what are we supposed to do if we get passed an empty string?

  • pinPine Avatar

    Literally can't wait to see who solved this in 5 lines of code :)

  • cjferm16 Avatar

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  • Alvinn Avatar

    my "solution worked" despite me not changing my code after 6-8 failed submissions

  • Alvinn Avatar

    protip: if you submit enough times, you might get lucky and get the answer accepted.

    my code didn't fucking work for a good 6-8 submissisions but decided to work. i feel like the test cases are messed up somehow.

  • Saidbek Avatar

    seems like the example and tests are totally wrong

  • ruderad Avatar

    I'm fairly new to programming and this kata was very challanging for me. after three or four hours of trial and error I came up with a solution that actually works but it's not the most readable and it might look bizzare in the eyes of a more experienced programmer. I would greatly appreciate it if a better-than-me programmer would kindly review my code and give me feedback on it and on how I can improve it further.

  • JonnathanLS Avatar

    Could anyone tell me if there is any way for the platform to display the arguments used in the assertiveness test?

    This would make it easier to identify why we were unable to send the code, but we were able to pass simple tests.

  • levovix0 Avatar

    однако тяжёлая kata... для 6-го то kyu

  • guymzee Avatar

    I'm not the strongest coder. Been on and off with python for a while now, and lately I've been more dedicated to learn. This Kata was extremely hard for me, definitely stretched my limits, I can't even believe I solved it. It's borderline spaghetti code, but I learned a lot doing this, I look forward to cleanining up the code for clarity.

    I will be looking at solutions to learn from, just wondering if others had a tough time with this as well and where they got stuck for extended periods and how they overcame it.... ok blab over just got a rush from this and am excited to discuss.

  • Mishania13 Avatar

    What about rounding Average is 5.5 will by 6 or 5?

  • Tarlanc Avatar

    The random tests use a different format than the basic tests. There is no blank after the comma, which prevents the strsplit() from working if the delimiter ", " is used.

  • sjamr10 Avatar

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  • headliner Avatar

    This should be at least 5kyu. Its hard.

  • Courtland9777 Avatar

    Fun kata, I enjoyed it. Not sure it is a 6 kyu imo. The empty string instruction could be improved for greater clarity.

  • feddorra Avatar

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  • RSynenko Avatar

    Nice kata and description. Sometimes I don't understand your katas description, but I like them. They always are interesting.

  • tacotomek Avatar

    Great kata, but I think slightly challanging for 6kyu

  • JasonMRoos Avatar

    This is among the more challenging of this kyu level, especially if one demands of himself that his code stay clean and organized.

  • G_kuldeep Avatar

    Nice katas:)

  • DeadPaws Avatar

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  • jsalinasf Avatar

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  • JL2210 Avatar

    The name of the function is the same as a function provided by the C library.

  • JoeMedrano Avatar

    I'm doing this in Ruby and I'm having trouble making this one pass all the tests.

    If I could see the full test string where it's failing than I may be able to fix my code. It is passing the two sample test. Is there a way I can see the string that is making it fail? Or can someone give me some more sample strings so I can test my code. Thanks.

  • DarkestHobbit Avatar

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  • ealgori Avatar

    All test pass, but at the end runtime exception. Looks like some test dsl issue. https://ibb.co/s9h5vd9

    "at System.Globalization.TimeSpanParse+TimeSpanResult.SetFailure (System.Globalization.TimeSpanParse+ParseFailureKind failure, System.String failureMessageID, System.Object failureMessageFormatArgument, System.String failureArgumentName) [0x0002e] in :0

  • UndeadRat22 Avatar

    Tests for this kata fail. randomTests.py for x in range(0, 50) takes too many positional arguments according to the tracklog, line 70. (maybe python2 vs python3, i wouldn't know.) Can't submit my answer until it's fixed.

  • caoenjie Avatar

    I used C to pass all the tests, but when I submit, I got this information.

    ``` Test Crashed Exit code: 0 Signal code: 8

  • renldx Avatar

    Please add Swift 4 support. Thanks!

  • petrarch1603 Avatar

    I like this Kata, combines a lot of different skills.

  • Stella_D Avatar

    %02d is a valid expression in sprintf in R. However, it always gives error for that.

  • jaimemin Avatar

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  • shimst3r Avatar

    You should really point out in the problem description that empty strings should be handled in a specific manner. This really made me angry. :(

  • Tomas Strolys Avatar

    That was fun :)

  • Bop4yH Avatar

    wrong example in the explaining lol "01|15|59, 1|47|6, 01|17|20, 1|32|34, 2|3|17" "Range: 00|47|18 Average: 01|35|15 Median: 01|32|34" not right rly

  • Belia Avatar

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  • Yo.Da Avatar

    I pass all the sample tests but when attempt i get error: undefined offset 1. hose tests are terribly wrong. Everything works when I test it on my localhost...

  • StarChe Avatar

    I believe that the test in this kata is incorrect. so you can not go through this kata. Data for the entrance: "01 | 15 | 59, 1 | 47 | 16, 01 | 17 | 20, 1 | 32 | 34, 2 | 17 | 17». The data you need to get: Range: 01 | 01 | 18 Average: 01 | 38 | 05 Median: 01 | 32 | 34. Data that are obtained: Range: 01 | 32 | 43 Average: 01 | 25 | 29 Median: 01 | 17 | 20. Correct the calculation formulas in the test.

  • Giacomo999 Avatar

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  • Cptnprice Avatar

    Nice kata :)

  • michaeljancsy@gmail.com Avatar

    Polite suggestion: change the gendered wording in the first sentence of the description.

    Instead of writing You are the "computer man"...,
    write: You are the "computer person"... (or computer expert etc.)

  • MatteoLucarelli Avatar

    Hi, there's an error in the last random case. I'm using C code and counts the number of imput times using the number of spaces +1. This work for every case except the last (the random one) because in this test the last time is followed by comma and space. It can be easily solved but is triky. The description sais "no surprise in the input format" so I think this is simply an error of how the random test is written.

  • Akliss Avatar

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  • ZebraLAN Avatar

    Can anyone into the test cases of the c version?

    I got some strange test case like this: "00|15|1711|15|59, 02|22|00, 02|47|16, 02|32|34, 01|17|20, 12|17|20, 01|22|34, 02|17|17"

    Tried to handle "00|15|1711|15|59" as two seperated records, but got this error message: "Error. Expected Range: 11|33|49 Average: 03|12|29 Median: 02|19|38 but got Range: 12|02|03 Average: 04|03|04 Median: 02|22|00"

    How is it possible that 11|33|49 is the range!?

  • apvanzanten Avatar

    This kata's instruction need to be expanded. It should be clear from the instructions how the program is expected to deal with missing delimiters and such.

  • vsmyron Avatar

    Hi guys, my solution works fine when testing it through VS. But when I try the solution through the portal it outputs different values to what VS does. Does anyone know why this might be happening?

  • zardoxnet Avatar

    another trap I found is missing commas between runner times. I used print to log the string that is used as a parameter and get:

    01|15|59, 1|47|16, 01|17|20, 1|32|34, 2|17|1702|15|59, 2|47|16, 02|17|20, 2|32|34, 2|17|17, 2|22|00, 2|31|4102|15|59, 2|47|16, 02|17|20, 2|32|34, 2|32|34, 2|17|17

    2|17|1702|15|59 is not a properly foratted time. Should the solution split that into 2|17|17 and 02|15|59 or should all of it be ignored?

  • Toolgirl Avatar

    In the description it said there were no traps in the input data. However, in the random test it failed because an input string was empty. It would be useful if the instructions provided for what should be returned in the case of an empty string.

  • uapasha Avatar

    Does anybody tried to solve this using Date object in JS?

  • exvion Avatar

    All tests passed. But I have the error. Ruby 2.3.0 stat': undefined method -' for nil:NilClass (NoMethodError) from rnd_kata_tests' from

    '

  • da_big_fella Avatar

    if the given string is "" you will return ""

    This part is kinda silly.

  • blborg Avatar

    In C#, "run test" does not work .. output: No tests were provided

  • appsincaps Avatar

    Your tests in coffeescript give the following error - ReferenceError: pad is not defined. It looks like a problem on your end.

  • user6073767 Avatar

    My solution is always failed on random test. I have a FormatException in this lines:

    string[] dates = str.Split(new string[]{", "}, StringSplitOptions.None); ... TimeSpan.ParseExact(dates[0,1,2...loop by dates here], "h'|'m'|'s", CultureInfo.InvariantCulture);

    But on my computer it works with all input values, you pass into my stat-method What's wrong with me?

  • vtlch Avatar

    Hello, can u help me? assertEquals("Range: 01|01|18 Average: 01|38|05 Median: 01|32|34", Stat.stat("01|15|59, 1|47|16, 01|17|20, 1|32|34, 2|17|17")) im have result string :-> Range: 01|32|43 Average: 01|25|29 Median: 01|32|34 expected: but was: If range = max_value - min_value, i cant get Range: 01|01|18 for this stats. same in Average... No ideas what im doing wrong.

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  • katherinepierce7 Avatar

    Hi! my code works fine with the Test Cases and when I click on "Run Tests" it passes the tests. but when I try to submit the answer it tells me that the answers are incorrect. what should I do? I checked the program with my own compiler with different strings and it worked fine /o\

  • cassioscabral Avatar

    Explain properly edge cases

  • votiv Avatar

    Hi! Everything seems to be working, but still i get:

    RandomTests(StatTest) ****** Random tests ****** expected: but was:

    I don't know what the test input is, so i don't know what to optimize, what to work on. I'm am working in an ide, there everything is fine. I can't figure this one out :)

  • xkey Avatar

    To large

  • bkaes Avatar

    Haskell: Initial solution is missing the module header.

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  • Darnor Avatar

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  • Abbe Avatar

    In JavaScript, I just the following message when running the random tests:

    ReferenceError: time2snd is not defined 
    at Array.map 
  at stat1231
    at Object.Test.it
    at Object.Test.describe

    I pass the hard coded tests.