sagea

class Application extends React.Component {
  constructor () {
    super();
    this.state = {
      euro: 0,
      czk: 0
    }
  }
  updateEuro (event) {
    const euro = parseInt(event.target.value);

sagea

export function getRandomValueFromArray (arr) {
  return arr[ Math.floor(Math.random() * arr.length) ];
}

// Credit: João Victor
// Github: https://github.com/Jvsierra
// CodePen: https://codepen.io/Jvsierra/pen/BNbEjW
export function uuidv4 () {
  function s4() {
    return Math.floor((1 + Math.random()) * 0x10000)

sagea

// Point is inside circle.
function isWithinCircle(x, y, circleX, circleY, circleRadius){
  return square(circleX - x) + square(circleY - y) < square(circleRadius);
}

// Two circles interecting
function doCirclesIntersect(x1, y1, r1, x2, y2, r2){
    return Math.sqrt(square(x1-x2) + square(y1 - y2)) <= r1 + r2;
}