AndrewThian

# find various file extensions and copy to provided directory
# https://stackoverflow.com/questions/5241625/find-and-copy-files

find / \( -name "*.html" \) -exec cp {} /<directory>;

# grep to find emails
# https://stackoverflow.com/questions/2898463/using-grep-to-find-all-emails

grep -Eiorh '([[:alnum:]_.-]+@[[:alnum:]_.-]+?\.[[:alpha:].]{2,6})' "$@" * | sort | uniq > <filename>.txt

AndrewThian

// Simple logging functionality
const sqrt = Math.sqrt;

console.log("result", sqrt(16))
console.log("result", sqrt(9))



// ======= logging ====== //
// Introducing logging within the function

AndrewThian

// another approach is used by libraries such as jQuery
// similar to annoymouns-closure.js but now we passing global variables as parameters

var $ = { window: {} };
(function (globalVariable) {

    // Keep this variables private inside this closure scope
    var privateFunction = function() {
      console.log('Shhhh, this is private!');
    }

AndrewThian

Hyper config

Installing hyper-material-theme. Just follow these instructions.

Set Hyper to use WSL's Bash by default

• Open up Hyper and type Ctrl + ,
• Scroll down to "shell" in the config and change it to C:\\Windows\\System32\\bash.exe
• Reload Hyper

AndrewThian

Docker Commands, Help & Tips

Show commands & management commands

$ docker

Docker version info

AndrewThian

function substring(str) {
    if (str.length <= 1) {
        return str.length
    }

    let startpoint = 0;
    let max = 0;
    let len = str.length;
    let lookup = new Map();
    let dictionary = new Map();

AndrewThian

function balanced(str) {
    const stack = []
    let top;
    for (let i = 0; i < str.length; i++) {
        const char = str[i]
        if (char === "(" || char === "{" || char === "[") {
            console.log("pushing to stack")
            stack.push(char)
        } else {
            if (stack.length === 0) { 

AndrewThian

function checkstring(str) {
    let pointer = 0;
    let len = str.length
    let smileCount = 0
    let smileyBank = []
    while (pointer < len - 1) {
        const currentSymbol = str[pointer]
        const nextSymbol = str[pointer + 1]
        if (currentSymbol === ":") {
            console.log(currentSymbol, nextSymbol)

AndrewThian

function printPrime (num) {
    for (let counter = 1; counter <= num; counter++) {
        let prime = true;
        for (let j = 2; j <= counter; j++) {
            // if it can modus without remainder and it's not it self, means it's not prime
            if (counter % j === 0 && counter !== j) {
                prime = false;
            }
        }
        if (prime) {

AndrewThian

class LinkedList {
    constructor(head=null) {
        this.head = head;
        this.count = 0;
    }
    add (newData) {
        // create node
        // reference previous node to new node
        let temp = new Node(null, newData);
        let current = this.head;