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Tunzale1 · Jul 7, 2023 · f7fcfda · f7fcfda
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diff --git a/hw2/assets/image-1.png b/hw2/assets/image-1.png
diff --git a/hw2/assets/image-2.png b/hw2/assets/image-2.png
diff --git a/hw2/assets/image-3.png b/hw2/assets/image-3.png
diff --git a/hw2/assets/image.png b/hw2/assets/image.png
diff --git a/hw2/index.html b/hw2/index.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Closure</title>
+</head>
+<body>
+    <div id="root"></div>
+    <script src="./script.js"></script>
+</body>
+</html>
diff --git a/hw2/readme.md b/hw2/readme.md
@@ -0,0 +1,10 @@
+*Theoretical Question*
+- Provide a few examples of when it is appropriate to use the try...catch construct in code.
+- The code in the try block is executed first, and if it throws an exception, the code in the catch block will be executed.
+- Mainly i use try...catch to handle an error. 
+- ![Alt text](assets/image.png)
+- ![Alt text](assets/image-1.png)
+- Parsing and validating input:
+- When parsing or validating user input, there might be cases where the input doesn't meet the expected format or requirements. In such problems, you can use try...catch to catch and handle those errors. For example, when parsing JSON data, you can use try...catch to handle potential parsing errors.
+- ![Alt text](assets/image-2.png)
+- ![Alt text](assets/image-3.png)
diff --git a/hw2/script.js b/hw2/script.js
@@ -0,0 +1,56 @@
+const books = [
+  {
+    author: "Lucy Foley",
+    name: "List of Invitees",
+    price: 70
+  },
+  {
+    author: "Susanna Clarke",
+    name: "Jonathan Strange & Mr Norrell",
+  },
+  {
+    name: "Design. A Book for Non-Designers.",
+    price: 70
+  },
+  {
+    author: "Alan Moore",
+    name: "Neonomicon",
+    price: 70
+  },
+  {
+    author: "Terry Pratchett",
+    name: "Moving Pictures",
+    price: 40
+  },
+  {
+    author: "Angus Hyland",
+    name: "Cats in Art",
+  }
+];
+
+const root = document.getElementById("root");
+const ul = document.createElement("ul");
+
+function createBookList(books) {
+  books.forEach(book => {
+    if (validateBook(book)) {
+      const li = document.createElement("li");
+      const bookInfo = Object.entries(book).map(([key, value]) => `${key} - ${value}`).join(" / ");
+      li.textContent = bookInfo;
+      ul.appendChild(li);
+    }
+  });
+
+  root.appendChild(ul);
+}
+
+function validateBook(book) {
+  const requiredFields = ['author', 'name', 'price'];
+  const missingFields = requiredFields.filter(field => !Object.keys(book).includes(field));
+  if (missingFields.length > 0) {
+    console.error("Missing: ", missingFields, book);
+    return false;
+  }
+  return true;
+}
+createBookList(books);