Dictionary - remove entry for key crash problem

[Executioner]

Hey, I'm working on a flag quiz app using dictionary for the questions. I encountered a problem that couldn't be fixed for me, After 2 or 5 questions the app immediately crashes. Apparently it's a problem with my "removeQuestion" procedure, And I can't find the issue. I would be happy for help. thanks (by the way don't mind about the different language)

[dora_paz]

It would be easier if you post a test aia in order to check it because we can see your dictionary structure

[NishyanthKumar]

You're trying to remove "q"+Question+"A3"'s value twice in the procedure that's causing the problem. Since you've already removed the pair, I presume that the 2nd block in the screenshot's causing your problem, as it cannot find the key-value pair to remove.

[Executioner]

That's the dictionary
But anyways
Quiz_Game (1).aia (127.1 KB)
Go to "Flag Quiz" screen

[Executioner]

Thanks, I didn't put attention on that. but unfortunately when I changed from A3 to A4 nothing changed, the same thing still happens

[Executioner]

So how do I basically remove a question to prevent it from duplicating using dictionary?

[RamNaresh]

Make changes to this code block as

I tested, now it is not causing to breack screen or app close after answering few questions, and it also make your code modular/concise.

[RamNaresh]

And need to change here also

Increment to row after calling removingQuestions procedure.

[Executioner]

Thanks so much, it worked. There are 2 problems - Firstly after 1 random question it does the same sequence of questions, secondly When you play again then the question itself is deleted and there's no block of "insert a dictionary key". I need help with that, thanks

[RamNaresh]

@Executioner

When you play again then the question itself is deleted and there's no block of "insert a dictionary key"

One solution could be not to work on original dictionary, instead work on a copy of it, making origoinal dictionary keep intect, and when you start you app again do work on the copy of original one.

[Executioner]

Alright, but every question still duplicates though.

[RamNaresh]

Yes, copy dictionary won't suppurt as it is having some know issue

Copy dictionary doesn't work OR what am I missing?

Interestingly the documentation says this: [image] The copy dictionary makes a deep copy of the given dictionary. This means that all of the values are copied recursively and that changing a value in the copy will not change it in the original. But the tooltip says this: Returns a shallow copy of the dictionary Will assign to Evan at MIT

[Executioner]

Oh, alright. thanks for helping

[RamNaresh]

You can have deepCopy function created by ABG and these blocks can be dragged directly into your Blocks Editor workspace. Just pass your original dictionary and you will be returned a copy.

Copy dictionary doesn't work OR what am I missing?

Here is a version of deepCopy that avoids any potential problems with the list copy block's handling of dictionaries ... [deepCopy] (edit - ABG) P.S. These blocks can be dragged directly into your Blocks Editor workspace. See A way to group projects by theme for a demo.

Now you can work on the copy not the original dictionary, so when you delete items from copy dictionary it woun't affect the original. Whenever you restart the quize you can again create copy and work on that.

[ABG]

In case any one has not mentioned it, dictionaries don't work on iOS, only on Android.

[Executioner]

Thank you everyone for the help, at last I fixed the problem

[Executioner]