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export default function App() {
	const useFormInput = initialValue => {
		const [value, setValue] = useState(initialValue);
		const handleChange = event => setValue(event.target.value);
		return { value: value, onChange: handleChange };
	};

	const name = useFormInput('');
	const password = useFormInput('');

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// CLASSES

class Dog {
  constructor() {
    this.sound = 'woof';
  }
  talk() {
    console.log(this.sound);
  }
}

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// Global 

const numbers = [1, 2, 3, 4, 5, 6]

const number = (n) => {
  return numbers[n]
}

console.log(number(4))

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Object.equals = (x, y) => {
  if (x === y) return true;
  if (!(x instanceof Object) || !(y instanceof Object)) return false;
  if (x.constructor !== y.constructor) return false;

  for (let p in x) {
    if (!x.hasOwnProperty(p)) continue;
    if (!y.hasOwnProperty(p)) return false;
    if (x[p] === y[p]) continue;
    if (typeof x[p] !== 'object') return false;

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/**
|--------------------------------------------------
| CLASSES
|--------------------------------------------------
*/

class Point {
  constructor(x, y) {
    this.x = x;
    this.y = y;

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var _ = {};


/*********IDENTITY**********/
_.identity = function(val) {
    return val;
};

/*********FIRST**********/
_.first = function(array, n) {

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function LinkedList() {
  this.head = null;
}

LinkedList.prototype.isEmpty = function() {
  return this.head === null;
};

LinkedList.prototype.size = function() {
  var current = this.head;

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// Basic Recursion

const countDownFrom = (num) => {
    if (num === 0) return
    console.log(num)
    countDownFrom(num - 1)
}

countDownFrom(10)

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function reverseString(str) {
  return str.split('').reverse().join('')
}

console.log(reverseString('Hello'))

// Recursion

function reverseString(str) {
  return (str === '') ? '' : reverseString(str.substr(1)) + str.charAt(0);