text: 
  let obj = {
      name: 'Carrot',
      _for: 'Max',
      details: {
          color: 'orange',
          size: 12
      }
  };
  
  function Person(name, age) {
      this.name = name;
      this.age = age;
  }
  
  let person = Person("You", 24);
  
  let a = new Array();
  a[0] = 'dog';
  a[1] = 'cat';
  a[2] = 'hen';
  a.length;
  
  a = ['dog', 'cat', 'hen'];
  
  a[100] = 'test';
  a.length; // 101
  
  for (let x of a) {
      // x -> item
  }
  
  a.forEach(elem => {
      console.log(elem);
  });
  
  
  function Person2(first, last) {
      this.first = first;
      this.last = last;
  
      this.fullName = function() {
          return this.first + ' ' + this.last;
      }
  
      this.fullNameReversed = function() {
          return this.last + ' ' + this.first;
      }
  }
  
  let s = new Person2('Simon', 'Willison');
  