Tentando ter atribuitos privados no javascript: underscore e symbol

Author: nillswe

examples/charpter04/stack-symbol.js

@@ -0,0 +1,18 @@
+const Stack = require("../../src/js/data-structures/stack-symbol");
+
+const stack = new Stack();
+
+stack.push(5);
+stack.push(6);
+stack.push(7);
+
+console.log(stack.peek());
+console.log(stack);
+
+let objectSymbols = Object.getOwnPropertySymbols(stack);
+console.log("size:", objectSymbols.length);
+console.log("obj", objectSymbols);
+console.log("push", stack[objectSymbols[0]].push(10));
+
+stack[objectSymbols[0]][0] = "joao";
+console.log(stack[objectSymbols[0]]);

examples/charpter04/stack.js

@@ -7,5 +7,9 @@ stack.push(6);
 stack.push(7);
 
 console.log("Stack: ", stack.isEmpty());
-
 console.log("Stack: ", stack.toString());
+
+console.log(Object.getOwnPropertyNames(stack));
+console.log(Object.keys(stack));
+console.log(stack.items);
+console.log(stack.count);