Eloquent JavaScript (chapter 2 # Excersise)

chess_board.coffee

chessBoard = (size, chars) ->
  result = ''
  for i in [1..size*size]
    result += chars[i % chars.length]
    if i % size is 0
      result += '\n'
      if size % chars.length is 0
        chars = [chars[1], chars[0]]
    i++
  result

console.log chessBoard(9, ['#', ' '])

chess_board.js

function chessBoard(size, chars) {
  var result = "";
  for (var i = 1; i <= size*size; i++) {
    result += chars[i % chars.length]; 
    if((i % size) == 0) {
      result += "\n";
      if((size % chars.length) == 0) {
        chars = [chars[1], chars[0]]; 
      }
    }
  }
  return(result);
}

console.log(chessBoard(8, ["#", " "]));

fizzbuzz.coffee

fizzBuzz = (i, fizz_divider, buzz_divider) ->
  if i % fizz_divider is 0 and i % buzz_divider is 0
    'FizzBuzz'
  else if i % fizz_divider is 0
    'Fizz'
  else if i % buzz_divider is 0
    'Buzz'
  else
    i

for i in [1..100]
  console.log fizzBuzz(i, 2, 4)
  i++

fizzbuzz.js

function fizzBuzz(i, fizz_divider, buzz_divider) {
  if ((i % fizz_divider) == 0 && (i % buzz_divider) == 0) {
    return("FizzBuzz");
  } else if ((i % fizz_divider) == 0) {
    return("Fizz");
  } else if ((i % buzz_divider) ==0) {
    return("Buzz");
  } else {
    return(i);
  }
}

for (var i = 1; i <= 100; i++) {  
  console.log(fizzBuzz(i, 2, 4));
}

looping_a_triangle.js

var triangle = '';

for (var i = 1; i<=7; i++) {
  triangle += '#';
  console.log(triangle);
}