CRUD

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CrUD: Create, Update, Delete. The program runs with one of the following sets of arguments: -c name sex bd -u id name sex bd -d id -i id Argument values: name (String) sex ("m" or "f") bd (birth date in the following format: "04 15 1990") -c (adds a person with the specified arguments to the end of

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matemate123

Level 37 , Kraków, Poland

17 January, 09:36

It seemed fishy, why in the task description nothing about reading from console. Thanks for help guys. When we used args, task is nicer. Can be a little harsh when we have battle with terminal, but after that we're stronger and more resilient.

Tasmoda Android Developer

16 July 2022, 13:21

WARNING! Task has the potential to make your eyes drip some crystal clear liquids.

Thành Black

Level 49 , Hanoi

28 September 2021, 06:56

I don"t know anything

Mike S

Level 28 , Saint Louis, United States

26 January, 19:54

It appears that you've come a long way, Thanh. But I commiserate with the 'you' of the past. I feel so dumb right now.

Liliane Top Backend Developer at Procura

28 December 2020, 09:25

If you're lost with this task watch this video: https://www.youtube.com/watch?v=QBLcP0kRqMw I recommend at speed 1.25 and you can solve this one easily!!

MoJo

Level 22 , Cairns, Australia

29 November 2020, 22:13

this one wasn't easy... I knew there was something up when i didn't find the word "console" in the description. Look up the other comments for more info on what to do.

AlfredW

Level 23 , Denver, United States

12 September 2020, 17:35

There is clearly something that I am totally missing here....

Anthony Mack

Level 24 , Waukesha, United States

1 September 2020, 03:02

I would appreciate any feedback on why my code isn't working. I thought I'd be clever and try to use switch statements instead of if-else statements, but it doesn't appear to be accepting anything at all. Thank you in advance for your help.

BlueJavaBanana

Level 37

18 May 2020, 15:25

PRO TIP!!! This task uses the String[] args bit of the main(String[] args) If you want to test this and run code based on th String[] args in IntelliJ do this: 1. Click on the play button next to public static void main.... 2. Select the last option 'Create solution main'... 3. In the Create Run Configuration window look to Program Arguments 4. Set your arguements here for example: -u 1 Washington m "04 15 1990" or -c Washington m "04 15 1990" This took me a LONG time to figure out, hope it helps someone else.

+19

hidden #10522353

Level 19

22 June 2020, 13:05

Great advice. Thanks!!!

Petros

Level 23 , Columbia, United States

17 August 2020, 21:08

For those like me that like baby steps, I want to add to this: -u would be args[0], 1 would be args[1], m would be args[2] and "04 15 1990" would be args[3]. So -u 1 Washington m "04 15 1990" is all entered in the command line or in the Program Arguments mentioned above. The program then updates at Index 1 by changing the name, sex and birthdate to the aforementioned values. -c Washington m "04 15 1990" will go up to args[2] (args[0] = -c) (args[2] = "04 15 1990"). I know this is obvious to some but trying to also understand the command line threw me off. That's how the main method should be set up. Took wayyy too long to figure this out. I hope there's a lesson on this in the near future.

Mike S

Level 28 , Saint Louis, United States

30 January, 23:16

After 16 tries and probably about 6 hours with this, I finally solved this. Special thanks to Petros for breaking down the problem and requirements in a way that I was able to finally start understanding! : )

Nyerges Ferenc

Level 23 , Bükkábrány, Hungary

21 March 2020, 17:54

Awesome task, passed for the first time :-) Bit surprised I'm the 304th, though - where are the others?

Attila

Level 25

15 April 2020, 03:00

Gratulalok ha ez elsore sikerult.

Sela

Level 20 , Poland

9 August 2020, 07:56

much more now - updated count is 456

Dawid Bujnicki Junior Developer

3 June 2021, 11:58

645 people have done this task by now

Ahmed

Level 23 , Amsterdam, Netherlands

13 August 2019, 03:02

Is the best way to get the last index by using the size method? Like:

System.out.println(allPeople.size() - 1);

Anyone has another idea? I tried the method (lastIndexOf) but it doesn't seems to work

Attila

Level 25

15 April 2020, 02:58

Haha, my first thought was the same, but it seemed very unprofessional.. So actually it is:

allPeople.indexOf(Object);

Note: This is Java arraylist IndexOf() method, not the same asJava String indexOf() Method.