mindplace

def shuffle(array)
  counter = array.length - 1

  while counter > 0
    # item selected from the unshuffled part of array
    random_index = rand(counter)

    # swap the items at those locations
    array[counter], array[random_index] = array[random_index], array[counter]

mindplace

1. Make sure git is tracking your project locally

Do you need a refresher on git? Go through Codecademy's git course.

1. Using your terminal/command line, get inside the folder where your project files are kept: cd /path/to/my/codebase. → You cannot do this simply by opening the folder normally, you must do this with the command line/terminal.
   → Do you need a refresher on using your command line/terminal? I've compiled my favorite resources here.

2. Check if git is already initialized: git status

mindplace

Input/Output

Goals

• Know how to use gets to read input.
• Know why chomp is often used to clean input.
• Know the difference between print and puts.
• Know how to open a file
  • Know how to read a line from a file.
  • Know how to read in all the lines from a file.

mindplace

class Array
  def my_map(&prc)
    new = []
    self.my_each{|item| new << prc.call(item)}
    new
  end

  def my_select(&prc)
    selected = []
    self.my_each{|item| selected << item if prc.call(item)}

mindplace

class Array
  def my_each(&prc)
    i = 0
    while i < self.count
      prc.call(self[i])
      i += 1
    end
    self
  end
end

mindplace

function newList() {
  var listString = prompt("Welcome to GroceryListMaker!\n\n" + 
        "Enter items with quantities like so:\n"
        + "2 apples, 1 tomato, 3 pomegranates, 1 sugar");
  var list = {};

  listString = listString.split(", ");
  for (var i=0; i < listString.length; i++) {
    var quant = listString[i].split(" ")[0];
    var item = listString[i].split(" ")[1];

mindplace

function toBinaryNumber(number) {
  var returning = new Array;
  if (number % 2 != 0) {
    returning[0] = 1;
    number -= 1;
  }

  while (number > 0) {
    i = 1;
    while (Math.pow(2, i) <= number) {

mindplace

def to_binary(number)
  returning = []

  if number.odd?
    returning << 1
    number -= 1
  end

  while number > 0
    i = 1

mindplace

function BinaryConverter(binNum) {
  var numArray = binNum.toString().split("").reverse();
  var number = 0;
  for (var i=0; i < numArray.length; i++) {
    var num = parseInt(numArray[i]);
    var location = Math.pow(2, i);
    number += num * location;
  }
  return number;
}