milingo

###tcpdump: tcpdump -lnnvi any -w tcpdump-xvm18.out -s 0

###To list all open ports and their processes: sudo netstat -lpAinet

###To get ips without hostnames: sudo netstat -lpnAinet

###To list only what's using tcp port 443:

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// Init
new String[]{"a", "b"}

List<String> list =  new ArrayList<String>(
   Arrays.asList("String A", "String B", "String C")
);  

Map<String, Owner> owners = new HashMap<String, Owner>() {{
    put("no-money", createOwnerWithoutMoney());

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# Run only failed test on cucumber
mvn test -Dcucumber.options="@target/cucumber-failed.txt"

# Run only a feature on cucumber
mvn clean test -Dcucumber.options="/path/to/feature:37"

or

mvn clean test -Dcucumber.options="--tags @NonGeoLocatedBid"

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Tutorial

###Remove a merged branch git branch -d BRANCH

git push origin --delete BRANCH

Merge develop with feature branch

git checkout develop

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var groups =_.groupBy(categories, _.curry(_.has)(_, 'id'));

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### Clone collection from remote host

mongo
use <database>
db.cloneCollection("remote.host:27017", "<collection>")

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# Turn a List<> into String[]
String[] strings = list.stream().toArray(String[]::new);

# Reduce by collecting over a field
list.stream().collect(Collectors.mapping(
                      Person::getName,
                      Collectors.toList())),

# Run several tasks asynchronously and wait for them
CompletableFuture<Map<String, List<String>>> campaignsByGeohashWithLocationsFuture =

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milingo

const http = require('http');
const SocketIO = require('socket.io')

const server = http.createServer(function (req, res) {
...  
});

const io = SocketIO(server);
io.on('connection', (socket) => {
  socket.emit('tic', { seconds: 0 });

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<script src="/socket.io/socket.io.js"></script>
<script>
  const socket = io('http://localhost:3000');
  socket.on('tic', (data) => {
    console.log(data);

    data.seconds++;
    socket.emit('tac', data);
  });
</script>