madeleine68

Q1.

# "def color" is a regular method and it will create a new instance method, when used without an explicit receiver.
# In the context of a class, self refers to the current class. Defining a method on self.shape creates a class method.
# def bar.radius creates singleton method attached to the object bar. 
# The difference between class methods and singleton methods is that class methods are available to all instances of
#  a class object while singleton methods are available only to that single instance.
------------------------------------------------------------------------------------
Q2.
  module Enumerable

madeleine68

def benchmark
  start_time = Time.now
    yield
    end_time = Time.now
    x = end_time - start_time
end
 
# Be careful, pasting this into IRB will take a long time to print.
# It's a loooong string. :)
long_string = "apple"*100000000

madeleine68

const swapper = function(key1, object1, key2, object2) {
    console.log('Swap!');
    const keyValue1 = object1[key1] //=> 1
    const keyValue2 = object2[key2] //=> 5

    object1[key1] = keyValue2  // a : 5
    object2[key2] = keyValue1 // c : 1

    console.log('object1: ', object1);
    console.log('object2: ', object2);

madeleine68

const whereCanIPark = function (spots, vehicle) {
  let coordinates = false;
  for(i = 0; i < spots.length; i++) {
    for(j = 0; j < spots[i].length; j++) {
      if(vehicle === 'regular') {
        if(spots[i][j] === 'R') {
          coordinates = [j,i];
          break;
        }
      } else if (vehicle === 'small') {

madeleine68

const urlDecode = function(text) {
  // Put your solution here
  result = {};
  let splitText = text.replace(/%20/g, ' ')
    .split('&')
    .map(x => x.split("="));

  splitText.forEach( function(elm) {
  // statements
    result[elm[0]] = elm[1]

madeleine68

const instructorWithLongestName = function(instructors) {
  let sorted = instructors.sort(function(a, b) {

    return b.name.length - a.name.length;
});
  return sorted[0];
};

console.log(instructorWithLongestName([
  {name: "Samuel", course: "iOS"},

madeleine68

let numberOfVowels = function(data) {
  let count = 0;
  for (var i = 0; i < data.length; i++) {
    if(data[i] === 'a' || data[i] === 'e' || data[i] === 'i' || data[i] === 'o' || data[i] === 'u') {
      count++;
    }
  }
  return count;
};

madeleine68

let conditionalSum = function(values, condition) {
  var sum = 0;
  values.forEach( function(value) {
    if(condition == "even" && value % 2 === 0) {
      sum += value;
    } else if (condition == 'odd' && value % 2 !== 0) {
      sum +=value;
    }
  });
  return sum;

madeleine68

let sumLargestNumbers = function(data) {
  let sorted = data.sort(function(a,b){
    return b - a;
  })
  return sorted[0] + sorted[1];
};

console.log(sumLargestNumbers([1, 10]));
console.log(sumLargestNumbers([1, 2, 3]));
console.log(sumLargestNumbers([10, 4, 34, 6, 92, 2]));

madeleine68

start = dt.datetime(20XX, 1, 1)
end = dt.datetime.now()
    
for ticker in tickers:
    if not os.path.exists('stock_dfs/{}.csv'.format(ticker)):
        df = pdr.DataReader(ticker.replace('.', '-'), 'yahoo', start, end)
        df.reset_index(inplace=True)
        df.set_index("Date", inplace=True)
        df.to_csv('stock_dfs/{}.csv'.format(ticker))
    else: