romfrolov

Solidity learning list

1. CryptoZombies
2. Ethernaut
3. Solidity documentation
4. Ethereum Smart Contract Security Best Practices
5. List of known bugs in Solidity language

romfrolov

'use strict';

const dns = require('dns').promises;

/**
 * Check connection to internet.
 *
 * @return {Promise<Boolean>} Whether there is connection to internet or not.
 */
exports.checkInternet = function checkInternet() {

romfrolov

# backup your databases
docker exec -t your-db-container pg_dumpall -c -U postgres > dump_`date +%d-%m-%Y"_"%H_%M_%S`.sql

# restore your databases
cat your_dump.sql | docker exec -i your-db-container psql -U postgres

romfrolov

version: '3'

services:
    letsencrypt:
        image: linuxserver/letsencrypt
        container_name: letsencrypt
        restart: unless-stopped
        network_mode: host
        volumes:
            - ./config/letsencrypt:/config

romfrolov

fn bubble_sort(mut array: Vec<isize>) -> Vec<isize> {
    let mut swapped: bool;

    loop {
        swapped = false;

        for i in 0..array.len() - 1 {
            if array[i] > array[i + 1] {
                let temp = array[i];
                array[i] = array[i + 1];

romfrolov

# Delete all local branches that have been merged.
function delete_merged_branches() {
    git branch --merged | egrep -v "(^\*|master)" | xargs git branch -d
}