Created to demonstrate one of possible problems with a sample code in chapter four of the book Javascript Patterns. For more information, refer to an example on page 92 of the book.

memoization-with-anonymous-func.js

var func = function() {
    if ( !func.cache ) {
        console.log("cache initialized @" + new Date());
        func.cache = "complex result";
    }
    return func.cache;
};
 
var func2 = func;
 
func2();
// cache initialized
// "complex result"
 
func2(); 
// "complex result"
 
func();
// "complex result"
 
func = function() { 
    console.log("another"); 
};
 
func();
 
func2();
//cache initialized
//"complex result"