Making sense of function expressions, declarations, invocations and incantations :S

functions_reference.js

//Excerpts from https://dmitripavlutin.com/6-ways-to-declare-javascript-functions/
// also in  https://jsbin.com/bozilam
//for reference

// Function Declaration -----------------------------------------------
var count = function(array) { // Function expression
  return array.length;
};

var methods = {
  numbers: [1, 5, 8],
  sum: function() { // Function expression
    return this.numbers.reduce(function(acc, num) { // func. expression
      return acc + num;
    });
  }
};

console.log (count([5, 7, 8])); // => 3
console.log(methods.sum());    //` => 14

// Anonymous Function Expressiom ---------------------------------------
var getType = function(variable) {  
  return typeof variable;
};

console.log(getType.name); // => ''

// When the expression has the name specified, this is a named function expression.
//It has some additional properties in comparison with simple function expression:

// A named function is created, i.e. name property holds the function name
// Inside the function body a variable with the same name holds the function object
// Let's use the above example, but specify a name in the function expression:


var getType = function funName(variable) {
  console.log(typeof funName === 'function'); // => true
  return typeof variable;
};

console.log(getType(3));                    // => 'number'
console.log(getType.name);                  // => 'funName'
console.log(typeof funName === 'function'); // => false

function log(obj){
  console.log('log inspector start ===========');
  obj.getOwnPropertyNames().forEach(
    function (val, idx, array) {
      console.log(val + ' -> ' + obj[val]);
    }
  );
  console.log('log inspector done ============');
}

log("caca");
log(getType(3));