RxJava3 : debounce/skip unwanted ‘0’ in a flow of integers but want ‘0’ only if getting continuously

I have an Observable of Integer type which emits 0 and positive numbers and an Observer to catch the both. Observable either emits continuous zeros or continuous positive numbers every 10 milliseconds(One item at a time). Like 0,0,0,0,0,0,0,5,5,6,7,8,8,9,10,11,4,5,6,5,0,0,0,0,0… [expected] Also it emits zero in between positive numbers (rarely). Like 0,0,0,0,0,0,0,5,5,6,7,8,8,**0**,9,10,11,4,5,6,5,0,0,0,0,0… [unexpected] I want to debounce/skip…

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How to check if a mapping has not been written yet?

I have this mapping mapping (uint256 => string ) private storedData; I am trying to do this modifier dataNotStored(uint256 _index) { require( keccak256(abi.encodePacked(storedData[_index])) == keccak256(abi.encodePacked(”)) ); _; } function set(uint _index, string calldata _data_to_store) external dataNotStored(_index) { storedData[_index] = _data_to_store; } My goal is to avoid to allow only write for each entry of the…

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Docker internet access when iptables=false & INPUT policy is DROP

when /etc/docker/daemon.json is configured with { “iptables”:false, “dns”: [“8.8.4.4”, “8.8.8.8”] } docker build . hangs attempting to install from npm Step 5/21 : RUN npm install –production —> Running in f45ce5e18e88 and errors with npm ERR! code EAI_AGAIN npm ERR! errno EAI_AGAIN npm ERR! request to https://registry.npmjs.org/addressparser/-/addressparser-1.0.1.tgz failed, reason: getaddrinfo EAI_AGAIN registry.npmjs.org IPTables rules say…

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