variascoisA.js

var myself = { firstname: 'André ', lastname:'Pesci Cazetto' };

function showFullName(textparam = 'Text Param', numberparam = 10) {
  console.log(this.firstname, this.lastname, textparam, numberparam);
}

showFullName.call(myself);
showFullName.apply(myself);

// Call passa os parâmetros na sequência
showFullName.call(myself, 'Texto Parametro PTBR', '220');
// Apply passa os parâmetros numa array
showFullName.apply(myself, ['Texto Passado por array no aply', 30]);

--------

for (var i = 1; i <= 10; i++) {
  (function (n) {
    var timeout = setTimeout(function () {
      console.log(n);
    }, i*1000);
  })(i);
}

---------

console.log(this); // ReactComponent OK!
function functionName() { return this; }
console.log(functionName()); // undefined UHN!
console.log( functionName.apply(this) ); // waaaat?

----------

var context = 'global';
var object = {
  context: 'object',
  method: function () {
    function func () {
      var context = 'context';
      return this.context;
    }
    return func();
  }
};

console.log(object.method());


----------


class Thing {
  someMethod() {
    return this.otherMethod() + ' Yes! Class corresponds to Object.prototype!';
  }
}
Thing.prototype.otherMethod = function () {
  return 'It is a method of the class?';
};
var thing = new Thing();
thing.someMethod();


function functionName() {

}
console.log(typeof(Thing), typeof(functionName));

console.log(thing instanceof Thing);