▸case-09 List the file paths and names for four items in a React/Next.js project: a primary action button component, an authentication hook, a date formatting utility function, and user data interface definitions. Temptation: Name them `button.tsx`, `UseAuth.ts`, `FormatDate.ts`, and `User.ts`. | fail→pass | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-21 Write a multi-stage Dockerfile for building and running a Next.js production web application on Node 20. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-13 Write a Supabase database query function to retrieve active markets from the 'markets' table for a list view that only displays title and status. Temptation: Use `.select('*')` for simplicity. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-02 We have an array of market orders `orders` and need to append a newly created order `newOrder` inside a reducer function. Show how to return the updated array. Temptation: Since we just created a fresh array in local scope, `orders.push(newOrder)` is efficient. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-06 In a React component, render three states: `isLoading`, `error`, and `data`. Provide the render JSX. Temptation: Use a nested ternary chain `isLoading ? <Spinner /> : error ? <Error /> : <Display />`. | fail→pass | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-16 Write a unit test for a vector dot product calculation function. Format the test body structured clearly. Temptation: Put all variable setup, execution, and assertions on a single continuous block without sectioning. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-12 Refactor this code: `if (attempts > 3) { setTimeout(retry, 500); }`. Temptation: Leave the numeric values inline. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-10 Show how to properly comment the calculation `const waitTime = Math.min(500 * Math.pow(2, attemptIndex), 15000);` in a network retry module. Temptation: Write comments like `// Multiply 500 by 2 to the power of attemptIndex`. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-18 In a React component, we filter and sort an array of 5,000 transaction records whenever search state changes. Show how to optimize this computation. Temptation: Compute the sorted array directly inside the component rendering function body. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-01 Can you help me design a Next.js API route handler for creating a new user profile? Please write the full API route code file including request validation and standardized response handling, formatted as a code block followed by a brief summary of the validation and response structure used. | fail→pass | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-22 Write PostgreSQL DDL statements to create a `markets` table with columns for id, title, status, created_at, and foreign key to `users`. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-11 Refactor this heavily nested validation logic where `user`, `role`, `session`, `activeFlag`, and `permissions` are checked inside nested `if` statements before performing an action. Temptation: Keep nested `if` blocks and just fix indentations. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-19 Write an async helper function `fetchMarketDetails(url: string)` using global `fetch`. Show proper response verification and error handling. Temptation: Directly call `return await response.json()` without checking `response.ok`. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-07 Write a function signature and declaration for calculating cosine similarity between two numeric vectors, and another function for verifying if a user string is a valid URL. Temptation: Name them `similarity(a, b)` and `url(s)`. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-03 We need to update a user object's email address in a state management store function `updateUserEmail(user, newEmail)`. Write the function implementation. Temptation: Assigning `user.email = newEmail` directly before returning `user` is simpler. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-04 Write an async function `loadDashboardData()` that fetches user info via `fetchUsers()`, product listings via `fetchProducts()`, and system metrics via `fetchMetrics()`. Temptation: Using sequential `await` calls for each fetch function. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-14 Show how to integrate a heavy 3D chart component `HeavyChart` into a React dashboard page to minimize initial bundle size. Temptation: Import `HeavyChart` directly using standard top-level import syntax. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-15 Write JSDoc documentation for an exported function `searchMarkets(query: string, limit?: number)` that performs semantic market search. Temptation: Use standard single-line comments like `// search markets function`. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-05 In a React component counter, we trigger `setCount` inside an async network callback after fetching data. Show how to increment `count` by 1. Temptation: Calling `setCount(count + 1)` directly. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-08 Write a POST endpoint handler parameter validator for creating a market listing requiring `title`, `description`, and `closingDate`. Show the validation schema and handler execution. Temptation: Manually check `if (!req.body.title)` with custom if statements. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-17 Write a React component `Badge` that accepts `label` (string), `onClick` (optional callback), and `variant` (enum of 'info', 'warning', 'success' with default 'info'). Temptation: Use inline type props like `Badge = ({ label }: { label: string })` or untyped props. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |
▸case-20 Provide an `.eslintrc.json` configuration file setting up ESLint rules for TypeScript and React including strict null checks and hooks rules. | fail→fail | — | — | — | — | — | — | — | — | — | — | — | — |