java.util.ConcurrentModificationException

[cursive raft]

<@&987246399047479336> please have a look, thanks.

[cursive raft]

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[hoary pagoda]

haven't seen the code, but that error usually means your trying the alter the code in a place where it cannot be alterd

[olive onyx]

this is code

[hoary pagoda]

key = nonterminals.remove(0)+"";

probably there

[olive onyx]

variableProduction.put(key,newProductionList );

when i comment this it works

how can i fix

[woven crest]

You can't modify a collection while iterating over it. I think the first put call is fine as the key already exists, but the second one breaks. What behavior are you expecting? Do you want the loop to go over the added entries?

[hoary pagoda]

or check if the key exists and update the contents

[olive onyx]

but it needs to be added there :((((

[hoary pagoda]

then u need to rework the algo so it adds after the collection is not in use

[olive onyx]

if i add another hash

or what can i use instead of iterator

[static patio]

why did you delete the code?

I was reading it