regex_char_class.js

let string = "Enjoying my day at the beach! #beachday #day1";
let pattern = /\w/g
// \w means any word character (equal to [a-zA-Z0-9_])
// which means that \w includes underscore
// anything between a-z
// anything between A-Z
// anything between 0-9
console.log(string.match(pattern));
let patternNumber = /\d/g
// \d means any digit (equal to [0-9])
// Earlier we wrote as /[0-9]/g
console.log(string.match(patternNumber));