functions_Expressions

//Functions Expressions
//anonymous functions
//iffes

//function expression
function greetingOne(){  //greetingOne - function declaration, which is always named
    return "Good morning, neighbor!";
}


//anonymous function
var morningGreeting = function(){ //morningGreeting is a variable, but function() - isn't named
    return "Good Morning, neighbor!";
};
//where is
// var morningGreeting - access to function
// function() - anonymous function
morningGreeting();


//iife - IMMEDIATELY INVOKED FUNCTION EXPRESSIONS [IIFE]
var greetFullName = (function(firstName, lastName){
    return "Hello, " + firstName + " " + lastName + "!";
}());
//this function is wrapped in extra parenthesis (nawias zwykły)
//and extra () at the and of the IIFE function
//callback of this function may by inside or outside of this function
//eg.2

//function expression
var greeting1 = function(){
    return "Hello, people!";
};
//this function above need a parenthesis for callback
greeting1();

var greeting2 = (function(){
    return "Hello, everyone!";
}());

greeting2; //this function just need a variable callback