fix: add export {} to make files modules and fix typecheck errors

Author: kentcdodds

exercises/01.objects/01.solution.object-literals/index.ts

@@ -15,3 +15,6 @@ const admin: { name: string; age: number; email: string } = {
 
 console.log(`User: ${user.name}, Age: ${user.age}`)
 console.log(`Admin: ${admin.name}, Age: ${admin.age}`)
+
+// 🦺 This line ensures TypeScript treats this as a module
+export {}

exercises/01.objects/02.problem.property-access/index.ts

@@ -22,3 +22,6 @@ const product = {
 // console.log(product.rating)
 
 // console.log(formatProduct(product))
+
+// 🦺 This line ensures TypeScript treats this as a module
+export {}

exercises/01.objects/02.solution.property-access/index.ts

@@ -21,3 +21,6 @@ function formatProduct(p: { name: string; price: number }): string {
 // Property 'rating' does not exist on type '{ name: string; ... }'
 
 console.log(formatProduct(product))
+
+// 🦺 This line ensures TypeScript treats this as a module
+export {}

exercises/02.arrays/01.solution.array-basics/index.ts

@@ -12,3 +12,6 @@ console.log('Last product:', products[products.length - 1])
 console.log('Total products:', products.length)
 
 console.log('Products:', products)
+
+// 🦺 This line ensures TypeScript treats this as a module
+export {}

exercises/02.arrays/02.problem.array-types/index.ts

@@ -15,3 +15,6 @@
 
 // 🐨 Calculate the total value of all products (sum of prices)
 // 💰 Use reduce: allProducts.reduce((sum, p) => sum + p.price, 0)
+
+// 🦺 This line ensures TypeScript treats this as a module
+export {}

exercises/02.arrays/02.solution.array-types/index.ts

@@ -18,3 +18,6 @@ console.log('First product:', allProducts[0].name)
 // Calculate total using reduce (we'll cover this in detail in Exercise 04)
 const totalValue = allProducts.reduce((sum, product) => sum + product.price, 0)
 console.log(`Total inventory value: $${totalValue.toFixed(2)}`)
+
+// 🦺 This line ensures TypeScript treats this as a module
+export {}

exercises/02.arrays/03.problem.iteration/index.ts

@@ -20,3 +20,6 @@ const products: { name: string; price: number; inStock: boolean }[] = [
 
 // console.log('In stock:', inStockProducts.length)
 // console.log('Expensive products:', expensiveCount)
+
+// 🦺 This line ensures TypeScript treats this as a module
+export {}

exercises/02.arrays/03.solution.iteration/index.ts

@@ -40,3 +40,6 @@ for (const product of products) {
 
 console.log('In stock:', inStockProducts.length)
 console.log('Expensive products (>$50):', expensiveCount)
+
+// 🦺 This line ensures TypeScript treats this as a module
+export {}

exercises/04.array-methods/01.problem.map/index.ts

@@ -20,3 +20,6 @@ const products = [
 // console.log('Names:', names)
 // console.log('Prices:', prices)
 // console.log('Summary:', summary)
+
+// 🦺 This line ensures TypeScript treats this as a module
+export {}

exercises/04.array-methods/01.solution.map/index.ts

@@ -20,3 +20,6 @@ const summary = products.map((p) => ({
 console.log('Names:', names)
 console.log('Prices:', prices)
 console.log('Summary:', summary)
+
+// 🦺 This line ensures TypeScript treats this as a module
+export {}