bk201-

const { readFileSync, writeFileSync } = require('fs');
const input = readFileSync('./input.txt').toString();

function d23b() {
  let inp = input.split('\n')
    .map(line => line.trim())
    .filter(line => line.length > 0)

  let isValid = (y,x)=>!(y<0 || y>=inp.length || x<0 || x>=inp[0].length || inp[y][x] === '#');

bk201-

// function leastFactor(n) returns:
// * the smallest prime that divides n
// * NaN if n is NaN or Infinity
// *  0  if n is 0
// *  1  if n=1, n=-1, or n is not an integer

leastFactor = function(n) {
 if (isNaN(n) || !isFinite(n)) return NaN;  
 if (n==0) return 0;  
 if (n%1 || n*n<2) return 1;

bk201-

const executeOperations = (operations, args) => {
 return operations.reduce((args, method) => {
   return [method(...args)];
 }, args);
};

const $ = Symbol('RESULT_ARGUMENT');

function lazify(instance) {
 const operations = [];

bk201-

function watchProperty(object, key) {
  let propDescriptor = Object.getOwnPropertyDescriptor(object, key) || {
    value: undefined,
    configurable: true,
    enumerable: true,
    writable: true
  };

  let value = object[key];

bk201-

/**
 * Focused on the element if condition is True, and blur the focus if condition is False
 *
 * Searching focusable element by allowing conditions:
 * 1. Searching the element by selector from "focusOn" attribute
 * 2. Searching the element with "autofocus" attribute
 * 3. Searching the first element who can get cursor
 * 4. Otherwise set yourself as focusable element
 */