Update exercises and add .diffignore

kentcdodds · kentcdodds · commit ae6a0f1ef17d · 2026-01-14T10:48:47.000-07:00
diff --git a/epicshop/.diffignore b/epicshop/.diffignore
@@ -0,0 +1 @@
+*.test.*
diff --git a/epicshop/post-set-playground.js b/epicshop/post-set-playground.js
@@ -37,9 +37,4 @@ for (const testFile of testFiles) {
 	const dest = path.join(destDir, testFile)
 
 	fs.copyFileSync(src, dest)
-	console.log(`✅ Copied ${testFile} from solution to playground`)
-}
-
-if (testFiles.length > 0) {
-	console.log(`\n📋 Copied ${testFiles.length} test file(s) to playground`)
 }
diff --git a/exercises/01.objects/01.problem.object-literals/index.ts b/exercises/01.objects/01.problem.object-literals/index.ts
@@ -13,5 +13,3 @@
 
 // console.log(`User: ${user.name}, Age: ${user.age}`)
 // console.log(`Admin: ${admin.name}, Age: ${admin.age}`)
-
-export {}
diff --git a/exercises/01.objects/01.solution.object-literals/index.ts b/exercises/01.objects/01.solution.object-literals/index.ts
@@ -15,5 +15,3 @@ const admin: { name: string; age: number; email: string } = {
 
 console.log(`User: ${user.name}, Age: ${user.age}`)
 console.log(`Admin: ${admin.name}, Age: ${admin.age}`)
-
-export {}
diff --git a/exercises/01.objects/02.problem.property-access/index.ts b/exercises/01.objects/02.problem.property-access/index.ts
@@ -22,5 +22,3 @@ const product = {
 // console.log(product.rating)
 
 // console.log(formatProduct(product))
-
-export {}
diff --git a/exercises/01.objects/02.solution.property-access/index.ts b/exercises/01.objects/02.solution.property-access/index.ts
@@ -21,5 +21,3 @@ function formatProduct(p: { name: string; price: number }): string {
 // Property 'rating' does not exist on type '{ name: string; ... }'
 
 console.log(formatProduct(product))
-
-export {}
diff --git a/exercises/01.objects/03.problem.optional-properties/index.ts b/exercises/01.objects/03.problem.optional-properties/index.ts
@@ -22,5 +22,3 @@
 //   console.log(`Email: ${user.email}`)
 //   console.log(`Bio: ${user.bio ?? 'No bio provided'}`)
 // }
-
-export {}
diff --git a/exercises/01.objects/03.solution.optional-properties/index.ts b/exercises/01.objects/03.solution.optional-properties/index.ts
@@ -28,5 +28,3 @@ function displayUserInfo(user: {
 
 displayUserInfo(alice)
 displayUserInfo(bob)
-
-export {}
diff --git a/exercises/02.arrays/01.problem.array-basics/index.ts b/exercises/02.arrays/01.problem.array-basics/index.ts
@@ -13,5 +13,3 @@
 // 🐨 Log the total number of products
 
 // console.log('Products:', products)
-
-export {}
diff --git a/exercises/02.arrays/01.solution.array-basics/index.ts b/exercises/02.arrays/01.solution.array-basics/index.ts
@@ -12,5 +12,3 @@ console.log('Last product:', products[products.length - 1])
 console.log('Total products:', products.length)
 
 console.log('Products:', products)
-
-export {}
diff --git a/exercises/02.arrays/02.problem.array-types/index.ts b/exercises/02.arrays/02.problem.array-types/index.ts
@@ -15,5 +15,3 @@
 
 // 🐨 Calculate the total value of all products (sum of prices)
 // 💰 Use reduce: allProducts.reduce((sum, p) => sum + p.price, 0)
-
-export {}
diff --git a/exercises/02.arrays/02.solution.array-types/index.ts b/exercises/02.arrays/02.solution.array-types/index.ts
@@ -18,5 +18,3 @@ 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)}`)
-
-export {}
diff --git a/exercises/02.arrays/03.problem.iteration/index.ts b/exercises/02.arrays/03.problem.iteration/index.ts
@@ -20,5 +20,3 @@ const products: { name: string; price: number; inStock: boolean }[] = [
 
 // console.log('In stock:', inStockProducts.length)
 // console.log('Expensive products:', expensiveCount)
-
-export {}
diff --git a/exercises/02.arrays/03.solution.iteration/index.ts b/exercises/02.arrays/03.solution.iteration/index.ts
@@ -40,5 +40,3 @@ for (const product of products) {
 
 console.log('In stock:', inStockProducts.length)
 console.log('Expensive products (>$50):', expensiveCount)
-
-export {}
diff --git a/exercises/03.tuples/01.problem.fixed-length/index.ts b/exercises/03.tuples/01.problem.fixed-length/index.ts
@@ -18,5 +18,3 @@
 // console.log(formatCoordinate(nyc))
 // console.log(formatCoordinate(la))
 // console.log(`Distance: ${getDistance(nyc, la).toFixed(2)}`)
-
-export {}
diff --git a/exercises/03.tuples/01.solution.fixed-length/index.ts b/exercises/03.tuples/01.solution.fixed-length/index.ts
@@ -21,5 +21,3 @@ function getDistance(
 console.log(formatCoordinate(nyc))
 console.log(formatCoordinate(la))
 console.log(`Distance: ${getDistance(nyc, la).toFixed(2)}`)
-
-export {}
diff --git a/exercises/03.tuples/02.problem.tuple-patterns/index.ts b/exercises/03.tuples/02.problem.tuple-patterns/index.ts
@@ -16,5 +16,3 @@
 // 🐨 Use destructuring to get the values
 // const [min, max] = getMinMax([5, 2, 8, 1, 9])
 // const [num, success] = parseNumber('42')
-
-export {}
diff --git a/exercises/03.tuples/02.solution.tuple-patterns/index.ts b/exercises/03.tuples/02.solution.tuple-patterns/index.ts
@@ -18,5 +18,3 @@ console.log(`Parsed '42': ${num1}, Success: ${success1}`)
 
 const [num2, success2] = parseNumber('hello')
 console.log(`Parsed 'hello': ${num2}, Success: ${success2}`)
-
-export {}
diff --git a/exercises/04.array-methods/01.problem.map/index.ts b/exercises/04.array-methods/01.problem.map/index.ts
@@ -20,5 +20,3 @@ const products = [
 // console.log('Names:', names)
 // console.log('Prices:', prices)
 // console.log('Summary:', summary)
-
-export {}
diff --git a/exercises/04.array-methods/01.solution.map/index.ts b/exercises/04.array-methods/01.solution.map/index.ts
@@ -20,5 +20,3 @@ const summary = products.map((p) => ({
 console.log('Names:', names)
 console.log('Prices:', prices)
 console.log('Summary:', summary)
-
-export {}
diff --git a/exercises/04.array-methods/02.problem.filter/index.ts b/exercises/04.array-methods/02.problem.filter/index.ts
@@ -29,5 +29,3 @@ const products = [
 // console.log('Electronics:', electronics)
 // console.log('Affordable:', affordable)
 // console.log('In Stock:', available)
-
-export {}
diff --git a/exercises/04.array-methods/02.solution.filter/index.ts b/exercises/04.array-methods/02.solution.filter/index.ts
@@ -39,5 +39,3 @@ console.log(
 	available.map((p) => p.name),
 )
 console.log('In-stock Electronics under $500:', inStockElectronicsUnder500)
-
-export {}
diff --git a/exercises/04.array-methods/03.problem.reduce/index.ts b/exercises/04.array-methods/03.problem.reduce/index.ts
@@ -26,5 +26,3 @@ const products = [
 // console.log('Total:', total)
 // console.log('Most expensive:', mostExpensive.name)
 // console.log('By category:', countByCategory)
-
-export {}
diff --git a/exercises/04.array-methods/03.solution.reduce/index.ts b/exercises/04.array-methods/03.solution.reduce/index.ts
@@ -31,5 +31,3 @@ const countByCategory = products.reduce(
 console.log(`Total: $${total.toFixed(2)}`)
 console.log(`Most expensive: ${mostExpensive.name} ($${mostExpensive.price})`)
 console.log('By category:', countByCategory)
-
-export {}
diff --git a/exercises/05.enums/01.problem.string-enums/index.ts b/exercises/05.enums/01.problem.string-enums/index.ts
@@ -24,5 +24,3 @@
 
 // console.log(order)
 // console.log(getStatusMessage(order.status))
-
-export {}
diff --git a/exercises/05.enums/01.solution.string-enums/index.ts b/exercises/05.enums/01.solution.string-enums/index.ts
@@ -33,5 +33,3 @@ console.log(getStatusMessage(order.status))
 // Update status and check again
 order.status = OrderStatus.Shipped
 console.log(getStatusMessage(order.status))
-
-export {}
diff --git a/exercises/05.enums/02.problem.enum-vs-union/index.ts b/exercises/05.enums/02.problem.enum-vs-union/index.ts
@@ -18,5 +18,3 @@
 // logWithUnion('info', 'Server started')
 
 // Which do you prefer?
-
-export {}
diff --git a/exercises/05.enums/02.solution.enum-vs-union/index.ts b/exercises/05.enums/02.solution.enum-vs-union/index.ts
@@ -31,5 +31,3 @@ logWithUnion('error', 'Connection failed')
 // Both provide the same type safety:
 // logWithEnum(LogLevel.Unknown)  // ❌ Error
 // logWithUnion('unknown')         // ❌ Error
-
-export {}
diff --git a/exercises/06.destructuring/01.problem.object-destructuring/index.ts b/exercises/06.destructuring/01.problem.object-destructuring/index.ts
@@ -35,5 +35,3 @@ const user: User = {
 // console.log(userId) // 'u123'
 // console.log(bio) // 'No bio provided'
 // console.log(formatUserCard(user))
-
-export {}
diff --git a/exercises/06.destructuring/02.problem.array-destructuring/index.ts b/exercises/06.destructuring/02.problem.array-destructuring/index.ts
@@ -26,5 +26,3 @@ const coordinates: [number, number, number] = [10, 20, 30]
 // console.log(winner, others) // 95 [87, 76, 92, 88]
 // console.log(x, y, z) // 10 20 30
 // console.log(min, max) // 76 95
-
-export {}
diff --git a/exercises/07.spread-rest/01.problem.object-spread/index.ts b/exercises/07.spread-rest/01.problem.object-spread/index.ts
@@ -53,5 +53,3 @@ const userConfig: Partial<Config> = {
 // console.log(finalConfig.timeout) // 10000
 // console.log(userWithDarkMode.settings.theme) // 'dark'
 // console.log(user.settings.theme) // 'light' (unchanged!)
-
-export {}
diff --git a/exercises/07.spread-rest/02.problem.rest-parameters/index.ts b/exercises/07.spread-rest/02.problem.rest-parameters/index.ts
@@ -32,5 +32,3 @@
 // console.log(createArray(1, 2, 3)) // [1, 2, 3]
 // console.log(createArray('a', 'b')) // ['a', 'b']
 // console.log(mergeArrays([1, 2], [3, 4], [5])) // [1, 2, 3, 4, 5]
-
-export {}

Original file line number	Diff line number	Diff line change
`@@ -37,9 +37,4 @@ for (const testFile of testFiles) {`
`37`	`37`	`const dest = path.join(destDir, testFile)`
`38`	`38`
`39`	`39`	`fs.copyFileSync(src, dest)`
`40`		- console.log(`✅ Copied ${testFile} from solution to playground`)
`41`		`-}`
`42`		`-`
`43`		`-if (testFiles.length > 0) {`
`44`		- console.log(`\n📋 Copied ${testFiles.length} test file(s) to playground`)
`45`	`40`	`}`