coffeeScript6.js

(function() {
  var b, c, obj, x;

  x = 13;

  if ((10 < x && x < 20)) {
    console.log('ok');
  }

  b = true;

  if (b === true) {
    console.log('yes!');
  }

  c = false;

  if (b && !c) {
    console.log('perfect!');
  }

  if (5 === 1 || 5 === 3 || 5 === 5) {
    console.log('exists');
  }

  obj = {
    score: 52
  };

  if ('score' in obj) {
    console.log('has point');
  }

}).call(this);