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const arr = [1,2,3]
const min = Math.min(...arr);
const max = Math.max(...arr);
console.log('min:', min, 'max:', max); // output => min: 1 max: 3

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# <IMAGE_NAME> - target image name in docker
# docker logs -f $(docker ps -q --filter="ancestor=<IMAGE_NAME>")
docker logs -f $(docker ps -q --filter="ancestor=mongo:3.3")

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const deep2array = [
  ['abc1', 'bcd1', 'def1'], 
  ['abc2', 'bcd2', 'def2'], 
  ['abc3', 'bcd3', 'def3']
];

const shallowFlatten = (p, c) => [...p, ...c];
console.log(deep2array.reduce(shallowFlatten, []))
/* output:
["abc1", "bcd1", "def1", "abc2", "bcd2", "def2", "abc3", "bcd3", "def3"]

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const array = [1, 2, 3, 1, 3, 4, 5, 2];
const uniqueArray = [...new Set(array)];
console.log(uniqueArray)
// output: [1, 2, 3, 4, 5]

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const array = [{id:1}, {id:2}, {id:3}, {id:4}, {id:5}, {id:2}, {id:6}, {id:4}, {id:7}];

function unique(array, propertyName) {
  return array.filter((e, i) => array.findIndex(a => a[propertyName] === e[propertyName]) === i);
}

console.log(unique(array, 'id'))
/*
output: 
[{"id":1},{"id":2},{"id":3},{"id":4},{"id":5},{"id":6},{"id":7}]

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sudo su -l

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es6/js snippets

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// based on https://github.com/baalexander/node-portscanner/blob/master/lib/portscanner.js
const {Socket} = require('net');

function connect(port, host, timeout, callback) {

    let connectionRefused = false;

    const socket = new Socket();
    let status = null;
    let error = null;

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awaitable = (func, ...args) => {
     return new Promise(resolve => {
        func.apply(this, [...args, (...a) => {
            if(a.length === 1){
                return resolve(a[0]);
            }
            if(a.length === 2){
                return resolve(a[1]);
            }
            return resolve(a);

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function runNpmInstall() {
    return new Promise((resolve, reject) => {
        let cmd = 'npm';
        if (os.platform() === 'win32') {
            cmd += '.cmd';
        }
        npmProcess = spawn(cmd, ['install'], {cwd: path.join(__dirname, 'service_')});

        npmProcess.on('error', e => {
            npmProcess = null;