Complete all tasks

02/app.js

@@ -12,9 +12,9 @@ const calendarJS = {
 
 
 for(const key in calendarJS) {
-    if((calendarJS[key]) === null) {
+    if(calendarJS[key] === null) {
         console.log(key, "nie zostało wydane");
     } else {
-    console.log(key, "wydano w terminie", (calendarJS[key]));
+    console.log(key, "wydano w terminie", calendarJS[key]);
     }
 }

03/app.js

@@ -47,7 +47,9 @@ books.getTitle = function(isbn, lang) {
     }
 
     const title =this[isbn].title;
-    return lang === 'en' ? title.en : title.pl;
+    if(typeof title[lang] !== 'undefined') {
+        return title[lang];
+    }
 }
 
 books.getTranslator = function(isbn, lang) {
@@ -56,8 +58,12 @@ books.getTranslator = function(isbn, lang) {
     }
 
     const translator = this[isbn].translator;
-    const result = translator[lang];
-    return result === null ? false : result;
+
+    if(typeof translator[lang] === 'undefined') {
+        return false;
+    }
+
+    return translator[lang] === null ? false : translator[lang];
 }