kermit-klein

function calculate(obj) {
  switch (obj.type) {
    case "number":
      return parseInt(obj.value);
    case "^":
      return calculate(obj.left) ** calculate(obj.right);
    case "+":
      return calculate(obj.left) + calculate(obj.right);
    case "-":
      return calculate(obj.left) - calculate(obj.right);

kermit-klein

function parse(fullString) {
  let strArray = fullString.split(" ");
  let pos = 0;

  function checkPos() {
    return strArray[pos];
  }

  function isNumber(e) {
    return e !== undefined && e.match(/^-?([1-9][0-9]*|([0]))$/) !== null;

kermit-klein

function parse(fullString) {
  let strArray = fullString.split(" ");
  let pos = 0;

  function checkPos() {
    return strArray[pos];
  }

  function isNumber(e) {
    return e !== undefined && e.match(/^-?([1-9][0-9]*|([0]))$/) !== null;

kermit-klein

function calculate(obj) {
  switch (obj.type) {
    case "number":
      return parseInt(obj.value);
    case "+":
      return calculate(obj.left) + calculate(obj.right);
    case "-":
      return calculate(obj.left) - calculate(obj.right);
    case "*":
      return calculate(obj.left) * calculate(obj.right);

kermit-klein

function splitString(str) {
  let seperatedString = str.split(" ");
  if (
    !seperatedString.every(
      (e) => /^-?([1-9][0-9]*|([0]))$|^[\+\*\/\-]$/.test(e)
    )
  ) {
    throw SyntaxError("Invalid Format");
  }

kermit-klein

const calcString = (str) => {
  let seperatedStr = str.split(" ");
  if (
    !seperatedStr.every((e) => /^-?([1-9][0-9]*|([0]))$|^[\+\*\/\-]$/.test(e)) // Wanted to check input validity, can be removed
  ) {
    throw SyntaxError("Invalid Format");
  }

  let definedOps = [
    { "*": (x, y) => x * y, "/": (x, y) => x / y },

kermit-klein

let testStrings = [
  { str: "1 + 1", ans: 2 },
  { str: "2 * 8", ans: 16 },
  { str: "6 - 0", ans: 6 },
  { str: "4 / 2", ans: 2 },
  { str: "5 + 7 * 2 - 4", ans: 15 },
  { str: "15 - 10 * -2", ans: 35 },
  { str: "1050 + 7 - 56 * 2", ans: 945 },
  { str: "50 / 2 / 5 * 3 - -10", ans: 25 },
  { str: "0 + 1 - -2 * -3", ans: -5 },

kermit-klein

var a = 1;
function b() {
  var a;
  a = function () {}
  a = 10;
  return;
}
b();
alert(a);

kermit-klein

var a = 1;
function b() {
  a = 10;
  return;
  function a() {}
}
b();
alert(a);

kermit-klein

var foo = 1;
function bar() {
  var foo;
    if (!foo) {
	    foo = 10;
	  }
  alert(foo);
}
bar();