# Student struggling with Hackathon

**URL:** <https://forum.code.org/t/student-struggling-with-hackathon/34228>\
**Category:** Coding and Debugging Help\
**Created:** [February 12, 2021, 3:31pm UTC](https://forum.code.org/t/student-struggling-with-hackathon/34228 "2021-02-12T15:31:40Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ahicks1](https://avatars.discourse-cdn.com/v4/letter/a/e495f1/32.png) [@ahicks1](https://forum.code.org/u/ahicks1)\
**Post date:** [February 12, 2021, 3:31pm UTC](https://forum.code.org/t/student-struggling-with-hackathon/34228/1 "2021-02-12T15:31:40Z")

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[Posts in the debugging category need to have the following pieces of information included in order to help other teachers or our moderator team best help you. Feel free to delete everything in brackets before posting your request for debugging help.]

**Link to the project or level:** [[Code.org - App Lab](https://studio.code.org/projects/applab/E5bBv7vIADMM1aej5hOlJ1zGsTLriLEox3VAhH1G6tc)  
**What I expect to happen:** The student wants to enter a state and have the info displayed about that state  
**What actually happens:** error appears on line 38  
**What I’ve tried:** This is my first year teaching this class. I’m honestly not sure where to start finding the issue.

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**Author:** ![jdonwells](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.code.org/jdonwells/32/7900_2.png) [@jdonwells](https://forum.code.org/u/jdonwells)\
**Post date:** [February 12, 2021, 5:00pm UTC](https://forum.code.org/t/student-struggling-with-hackathon/34228/2 "2021-02-12T17:00:18Z")

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The biggest problem I see is that it isn’t done. You need `onEvent` calls for all the buttons. You need to make the `"titleScreen"` screen the default.

Think about where to call `filter`. If you call it before `"stateInput"` has a value what state would you expect it to select?

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**Author:** ![ahicks1](https://avatars.discourse-cdn.com/v4/letter/a/e495f1/32.png) [@ahicks1](https://forum.code.org/u/ahicks1)\
**Post date:** [February 12, 2021, 5:12pm UTC](https://forum.code.org/t/student-struggling-with-hackathon/34228/3 "2021-02-12T17:12:55Z")

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I just went and looked at her project and she’s edited it. Even though I told her not to. I understand you can’t answer the question now.

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**Author:** ![503646](https://avatars.discourse-cdn.com/v4/letter/5/e19adc/32.png) [@503646](https://forum.code.org/u/503646)\
**Post date:** [December 22, 2021, 4:33pm UTC](https://forum.code.org/t/student-struggling-with-hackathon/34228/4 "2021-12-22T16:33:52Z")

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> [@Everything You Wanted to Know About App Lab Arrays, But Were Afraid to Ask](https://forum.code.org/t/everything-you-wanted-to-know-about-app-lab-arrays-but-were-afraid-to-ask/34277):
>
> Everything You Wanted to Know About Arrays, But Were Afraid to Ask. [] have two uses. One is to create an array and potentially initialize it. So for example: var a = [1,2,3]; That creates an array and assigns it to a variable. Is that variable an array now? No, it is not. Trick question. Variables don’t have types in Javascript. a is a variable that has an array value. It could just as easily hold a number or a string. Variables don’t care. I see a lot of var cats = [getColumn("Cats","Nam…