Question

in the following javascript code I see there’s a use of the command function, but it didn’t specify the name of the function. What’s this all about?

var getReview = function(movie) {
    switch (movie) {

    case "Matrix":
        return "good trip out";
        break;
    case "Princess Bride":
        return "awesome date night movie";
        break;
    case "Welcome to America":
        return "Amjad's favorite";
        break;
    case "Remember the Titans":
        return "love the sports";
        break;
    case "Why do I look like I'm 12?":
        return "The Ryan and Zach story";
        break;
    case "Fighting Kangaroos in the wild":
        return "Token Australian movie for Leng";
        break;
    default:
        return "I don't know!";
    }
};​

Answer 1

It’s an anonymous function.

Quoting from the link above:

Anonymous functions are declared using the function operator. You can
use the function operator to create a new function wherever it’s valid
to put an expression. For example you could declare a new function as
a parameter to a function call or to assign a property of another
object.

Here’s an example where a function is declared in the regular way using the function statement:

function eatCake() {
    alert("So delicious and moist");
}
eatCake();

Here’s an example where the same function is declared dynamically using the function operator:

var eatCakeAnon = function() {
    alert("So delicious and moist");
};
eatCakeAnon();