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import React, { useState, useEffect } from "react";
import { ethers } from "ethers";

function App() {
  const [provider, setProvider] = useState(null);
  const [address, setAddress] = useState("");
  const [amount, setAmount] = useState("");
  const [message, setMessage] = useState("");

  useEffect(() => {

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body {
    font-family: PolySans;

}

nav {
    padding: 20px;
    text-transform: uppercase;
    color: #ccc;
}

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/*

⚠ First install express and multer by running:
npm i -s express multer

*/

const express = require("express");
const multer = require("multer");
const path = require('path')

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Understanfing vuex (store) in Nuxt.js

NTL,R - A "store" is basically a reactive container that holds your application state. Also, data in a store is univeral, i.e you can access them anywhere in your vue/nuxt.js application

Key Terms

• State - state is just like data(){return{..}} in normal vue.js, but with different syntax in a store

• Mutation - mutations also are literally methods:{methodName(){...}} in a normal vue.js file, but with different syntax in a store

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Add comma separator to thousands - Javascript

const numberWithCommas = (x) => {
    return Number(x).toLocaleString();
}

Example

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Get Last Element In An Array - PHP, JavaScript & Python

Javascript

const sampleArray = ["foo", 1, 2,"bar"];
let lastElement = sampleArray[sampleArray.length - 1];
console.log(lastElement) // bar

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    function clean_hex(input, remove_0x) {
        input = input.toUpperCase();
        
        if (remove_0x) {
          input = input.replace(/0x/gi, "");        
        }
        
        var orig_input = input;
        input = input.replace(/[^A-Fa-f0-9]/g, "");
        if (orig_input != input)

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/*
 * Complete the vowelsAndConsonants function.
 * Print your output using 'console.log()'.
 */
function vowelsAndConsonants(s) {
    let output = [];
    s = s.toLowerCase();
    let letters = s.split("");
    for(let i = 0; i < letters.length; i++){
        if(s[i] == "a" || s[i] == "e" || s[i] == "i" || s[i] == "o" || s[i] == "u"){

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Terminology

• View: Also called a "template", a file that contains markup (like HTML) and optionally additional instructions on how to generate snippets of HTML, such as text interpolation, loops, conditionals, includes, and so on.
• View engine: Also called a "template library" or "templater", ie. a library that implements view functionality, and potentially also a custom language for specifying it (like Pug does).
• HTML templater: A template library that's designed specifically for generating HTML. It understands document structure and thus can provide useful advanced tools like mixins, as well as more secure output escaping (since it can determine the right escaping approach from the context in which a value is used), but it also means that the templater is not useful for anything other than HTML.
• String-based templater: A template library that implements templating logic, but that has no understanding of the content it is generating - it simply concatenates together strings, potenti

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Copied from http://code.lancepollard.com/complete-list-of-html-meta-tags/

Basic HTML Meta Tags

<meta name="keywords" content="your, tags"/>
<meta name="description" content="150 words"/>
<meta name="subject" content="your website's subject">
<meta name="copyright"content="company name">
<meta name="language" content="ES">