Check if 2D LinkedHashSet contains a specific string

I am trying to find whether a specific string value is found within a 2D LinkedHashSet I have created. Here is some code for the initialization of the LinkedHashSet: LinkedHashSet<LinkedHashSet<String>> block = new LinkedHashSet<LinkedHashSet<String>>(); I have tried using .contains like this but it seems to be an incorrect argument type: int N = Integer.parseInt(b1.readLine()); for(int…

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What’s wrong with an ’empty’ fallback function?

Contract A interacts with another contract B, which generally interacts with humans (ie, externally owned accounts). Thus when contract B sends ETH to contract A, contract A needs a fallback function to receive the ETH. I found the function below works, though my linter warns me that this is bad form (‘no-empty-blocks’). Where’s the danger?…

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