OneCent01

const countSubstringOccurrances = function(string, query) {
  let count = 0;
  while(string.includes(query)) {
    count++;
    let index = string.indexOf(query);
    string = string.slice(-(string.length-1-string.indexOf(query)));
  }
  return count;
};
  

OneCent01

function diagonal(matrix) {
  let row = matrix.length - 1;
  let col = matrix[row] ? matrix[row].length - 1 : null;
  let matrixDiagonal = [matrix[row][col]];
  let count = 0;
  while(row !== 0 || col !== 0) {
    if(!matrix[row+1] || !matrix[row+1][col-1]) {
      row -= count;
      col += count;
      count = 0;

OneCent01

const assert = function (condition, message) {
  console.assert.apply(console, arguments);
  typeof message === 'string' && condition ? 
    console.log('✔ ' + message) :
    console.log('✖ ' + message);
};
const test = () => {
  //assert(condition, message); example: 
  //assert(2 > 0, 'Two should be greater than zero!');
};

OneCent01

const hasLessThanTwoEdits = (string1, string2) => {
  if(string1.length - string2.length > 1) {
    return false;
  }
  let changes = 0;
  (string1.length >= string2.length ? string1 : string2).split('').forEach((char, i) => { string1[i] !== string2[i] ? changes++ : null });
  return changes < 2;
};

OneCent01

const isPalindrome = (string1, string2) => {
  if(string1.length !== string2.length) {
    return false;
  }
  let stringChars = string1.split('').reduce((acc, char) => {
    acc[char] ? acc[char]++ : acc[char] = 1;
    return acc;
  }, {});
  let string2chars = string2.split('').reduce((acc, char) => {
    acc[char] ? acc[char]++ : acc[char] = 1;

OneCent01

const urlify = (string) => {
  return string.split('').reduce((acc, char, i, array) => {
    if(char === ' ') {
      return acc += array[i+1] === ' ' || !array[i+1] ? '' : '%20';
    } else {
      return acc += char;
    }
  }, '');
};

OneCent01

const isPermutaiton = (s1, s2) => {
  let s1letterCounts = s1.split('').reduce((acc, letter) => {
    acc[letter] ? acc[letter] += 1 : acc[letter] = 1;
    return acc;
  }, {});
  let s2letterCounts = s2.split('').reduce((acc, letter) => {
    acc[letter] ? acc[letter]++ : acc[letter] = 1;
    return acc;
  }, {});
  let s1letters = Object.keys(s1letterCounts);

OneCent01

const isUniqueString = (string) => {
  for (let i = string.length - 1; i >= 0; i--) {
    if(string.indexOf(string[i]) !== i) {
      return false;
    }
  }
  return true;
};
var string = 'hello';
isUniqueString(string);

OneCent01

let num1 = 1;
let num2 = 2;
let num3 = 4;
let num4 = 8;

//assign number to variable
let biwiseORassignment = num2;
//perform a bitwise OR operation with the value of the variable 
//and that of a new variable:
biwiseORassignment |= num3;

OneCent01

const generateMaze = (length, width) => {
  const directionsVal = { N: 1, S: 2, E: 4, W: 8 };
  
  const generateBoard = (rows, columns) => {
    let board = [];
    for(var i = 0; i < rows; i++) {
      board.push([]);
      for(let j = 0; j < columns; j++) {
        board[i].push(0);
      }