QMaximillian

a. First, I would fix the spelling of the function to is_palindrome and give the variables within the function more semantic meaning. (i.e. s could be string).

Next, I would tackle time and space complexity. In the first for loop we are recreating s which already exists and incurring an O(n^2) time complexity while doing it. This is because strings in Python are immutable. So our first loop is O(n) and the act of recreating our r string on each pass is also O(n) giving us an O(n^2) time complexity. Creating a new string in memory also gives us an O(n) space complexity.

Lastly, there is no reason to set our x value to True on each iteration. If the reversed string and the string do not match, then it isn't a palindrome and we can immediately return False.

I would improve this code by creating two pointers: a left index (0) and a right index (length of the string minus one). Then while the left index is less than the right index, I would check to see if the input string's value at

QMaximillian

function ChangeMaker(price, payment) {
    let priceInCents = Math.round(price * 100)
    let paymentInCents = payment.reduce((acc, curr) => { 
      return acc += curr
    }) * 100
    

  if (paymentInCents > priceInCents){
    console.log('can purchase, subtract the amount given from the price')

QMaximillian

Markdown Compliant Link Styles

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QMaximillian

const soundMachine = Machine({
  id: 'sound',
  initial: 'playRed',
  states: {
    playRed: {
        entry: ['playRedSound']
    },
  }

QMaximillian

const soundMachine = Machine({
  id: 'soundMachine',
  initial: 'choose',
  states: {
    choose: {
      on: {
        PLAY_RED: {
          actions: (context, event) => console.log(context, events)
        }
      }

QMaximillian

const countMachine = Machine({
  id: 'doubleCounter',
  initial: 'idle',
  context: {
    count: 0
  },
  states: {
    idle: {
      on: {
        INC_COUNT_TWICE: {

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  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions

QMaximillian

const SayHelloWithName = () => (
  <Hello 
    render={({loud, handleLoudness }) => (
      <h1>
        <b onClick={handleLoudness}>
      {loud ? `${word} Quinn` : `${word.toUpperCase()} Quinn `}
        </b>
      </h1>
    )}
  />

QMaximillian

const SayHello = () => (
  <Hello 
    render={({ loud, word, handleLoudness }) => (
      <h1>
        <b onClick={handleLoudness}>
        {loud ? word : word.toUpperCase()}</b>
      </h1>
    )}
  />
);

QMaximillian

const word = 'hello';

class Hello extends React.Component {

  state={loud: false}

  handleLoudness = () => {
    this.setState({
      loud: !this.state.loud
    })