Fix incorrect name of module

JavaScript/4-iterator.js

@@ -24,6 +24,8 @@ Object.defineProperty(generateNumbersObject, Symbol.iterator, {
   configurable: false
 });
 
+// Usage:
+
 console.dir(generateNumbersObject);
 console.log(Object.getOwnPropertySymbols(generateNumbersObject));
 

JavaScript/6-hide-symbols.js

@@ -12,6 +12,10 @@ function hideSymbol(obj, symbol) {
     realObj: Object.assign(obj),
     simulateSecretField: undefined
   };
+
+  // As a result, the field obj.simulateSecretField in the object itself remained free
+  // And the user can use it as a normal fieldw
+
   obj = new Proxy(obj, {
     ownKeys: (target) => {
       if (symbol in target.realObj) {
@@ -71,5 +75,124 @@ function hideSymbol(obj, symbol) {
   return obj;
 }
 
-module.exports = hideSymbol;
+// Usage:
+
+// we have added an opcional method _debugOutputSecretField,
+// to check at the end of the work that the information in the secret field was left
+// This is the only way to verify this information
+// (This field should not be in a real project)
+
+let obj = {
+  name: 'Marcus Aurelius',
+  born: 121,
+  [Symbol.for('secret')]: 'some secret information',
+  [Symbol.for('notsecret')]: 'some not secret information',
+  get getter() {
+    return 'GETTER';
+  },
+  set setter(value) {},
+  get _debugOutputSecretField() {
+    return this[Symbol.for('secret')];
+  }
+};
+
+// We must completely hide the field obj[Symbol.for('secret')]
+
+console.log('\n\nBEFORE PROXYING:\n\n');
+
+console.log('\x1b[4mfor in:\x1b[0m');
+for (const i in obj) {
+  console.log(i);
+}
+
+console.log('\x1b[4mconsole.log("obj"):\x1b[0m');
+console.log(obj);
+
+console.log('\x1b[4mconsole.dir("obj"):\x1b[0m');
+console.dir(obj, {
+  showHidden: true,
+  depth: null
+});
+
+console.log('\x1b[4mconsole.log(Object.getOwnPropertyNames):\x1b[0m');
+console.log(Object.getOwnPropertyNames(obj));
+
+console.log('\x1b[4mconsole.log(Object.getOwnPropertySymbols):\x1b[0m');
+console.log(Object.getOwnPropertySymbols(obj));
+
+console.log(
+  '\x1b[4mconsole.log(Object.getOwnPropertyDescriptor(obj, Symbol.for("secret")))\x1b[0m'
+);
+console.log(Object.getOwnPropertyDescriptor(obj, Symbol.for('secret')));
+
+console.log('\x1b[4mconsole.log(Object.keys(obj)):\x1b[0m');
+console.log(Object.keys(obj));
+
+console.log('\x1b[4mconsole.log(obj[Symbol.for("secret")]):\x1b[0m');
+console.log(obj[Symbol.for('secret')]);
+
+console.log('\x1b[4mconsole.log(Object.entries(obj)):\x1b[0m');
+console.log(Object.entries(obj));
+
+
+// proxying:
+obj = hideSymbol(obj, Symbol.for('secret'));
+
+console.log('\n\nAFTER PROXYING:\n\n');
+
+console.log('\x1b[4mfor in:\x1b[0m');
+for (const i in obj) {
+  console.log(i);
+}
+
+console.log('\x1b[4mconsole.log("obj"):\x1b[0m');
+console.log(obj);
+
+console.log('\x1b[4mconsole.dir("obj"):\x1b[0m');
+console.dir(obj, {
+  showHidden: true,
+  depth: null
+});
+
+console.log('\x1b[4mconsole.log(Object.getOwnPropertyNames):\x1b[0m');
+console.log(Object.getOwnPropertyNames(obj));
+
+console.log('\x1b[4mconsole.log(Object.getOwnPropertySymbols):\x1b[0m');
+console.log(Object.getOwnPropertySymbols(obj));
+
+console.log(
+  '\x1b[4mconsole.log(Object.getOwnPropertyDescriptor(obj, Symbol.for("secret")))\x1b[0m'
+);
+console.log(Object.getOwnPropertyDescriptor(obj, Symbol.for('secret')));
+
+console.log('\x1b[4mconsole.log(Object.keys(obj)):\x1b[0m');
+console.log(Object.keys(obj));
+
+console.log('\x1b[4mconsole.log(obj[Symbol.for("secret")])\x1b[0m');
+console.log(obj[Symbol.for('secret')]);
+
+console.log('\x1b[4mconsole.log(Object.entries(obj)):\x1b[0m');
+console.log(Object.entries(obj));
+
+// overwrite:
+
+console.log('\n\nOVERWRITE SECRET FIELD:\n\n');
+
+console.log('\x1b[4m[Symbol.for("secret")] = "overwrite value"\x1b[0m');
+obj[Symbol.for('secret')] = 'overwrite value';
+
+console.log('\x1b[4mconsole.log("obj"):\x1b[0m');
+console.log(obj);
+
+console.log('\x1b[4mconsole.log(Object.getOwnPropertySymbols):\x1b[0m');
+console.log(Object.getOwnPropertySymbols(obj));
+
+console.log('\x1b[4mconsole.log(obj[Symbol.for("secret")])\x1b[0m');
+console.log(obj[Symbol.for('secret')]);
+
+// in fact, in the secret field our line is still stored
+
+console.log('\n\nREAL VALUE OF obj[Symbol.for("secret")]:\n\n');
 
+console.log('\x1b[4mconsole.log(obj._debugOutputSecretField):\x1b[0m');
+console.log(obj._debugOutputSecretField);