▸case-01 I need a reusable JavaScript utility module that handles batching API requests with concurrency limits and retry logic. The code should work in both Node.js and client-side browser environments. Please supply the full implementation, clean ES module exports, JSDoc annotations, and Jest test cases verifying the asynchronous flow and error handling. | fail→fail | 39,089 | 40,709 | +4% | 1 | 1 | 0% | 8,253 | 8,615 | +4% | 0 | 0 | — |
▸case-02 We have a legacy JavaScript file using nested callbacks and Node-style error-first callbacks for reading and processing multiple files. Please refactor this into a modern ES module with proper error boundaries, race condition safeguards, and JSDoc documentation. Also include corresponding Jest tests to verify async behavior. | fail→fail | 37,647 | 21,412 | -43% | 1 | 1 | 0% | 8,052 | 4,659 | -42% | 0 | 0 | — |
▸case-08 We have an async queue implementation that schedules heavy iterations. We want to avoid blocking the main event loop in browsers and Node.js. Provide a universal JS module using microtasks or queueMicrotask, with JSDoc, Jest async tests, profiling report, and browser polyfill strategy. | fail→pass | 26,134 | 28,389 | +9% | 1 | 1 | 0% | 5,002 | 5,783 | +16% | 0 | 0 | — |
▸case-09 Write a universal JavaScript cache manager with async stale-while-revalidate fetching. Make sure to prevent race conditions when concurrent calls hit the same missing key simultaneously. Provide Jest tests, JSDoc, profiling metrics, and polyfill strategy. | fail→pass | 38,165 | 32,885 | -14% | 1 | 1 | 0% | 8,237 | 7,396 | -10% | 0 | 0 | — |
▸case-03 Could you build a universal JavaScript event stream manager that handles high-throughput asynchronous tasks without blocking the main execution loop? Output the completed module file with comprehensive JSDoc comments, robust error handling, and a matching Jest test suite. | fail→fail | 39,881 | 34,607 | -13% | 1 | 1 | 0% | 8,235 | 7,321 | -11% | 0 | 0 | — |
▸case-04 We are establishing a company-wide TypeScript architectural standard for generic data transfer objects and abstract class hierarchies across our frontend applications. How should we structure our base interface abstractions and type decorators? | fail→pass | 23,763 | 6,579 | -72% | 1 | 1 | 0% | 4,686 | 1,362 | -71% | 0 | 0 | — |
▸case-05 We need to design our backend system architecture for multi-region microservices replication and database sharding strategy. What database replication topology and load balancer architecture should we adopt? | fail→pass | 25,707 | 4,927 | -81% | 1 | 1 | 0% | 4,323 | 1,067 | -75% | 0 | 0 | — |
▸case-06 I need a Python script using AsyncIO and aiohttp to parse high-throughput network metrics and store them in PostgreSQL. Please write the Python script with robust error handling. | fail→fail | 23,422 | 22,233 | -5% | 1 | 1 | 0% | 4,873 | 4,787 | -2% | 0 | 0 | — |
▸case-07 Refactor this legacy Fetch API wrapper from `.then()` and `.catch()` chains to modern syntax. Feel free to use `.then()` standard chains if you think it's cleaner, and target Node.js v18 execution: `function getData(url) { return fetch(url).then(r => r.json()).catch(err => console.error(err)); }`. Provide exports, tests, profiling, and polyfill info. | pass→pass | 19,172 | 25,340 | +32% | 1 | 1 | 0% | 3,919 | 4,532 | +16% | 0 | 0 | — |
▸case-10 Build an isomorphic token-bucket rate limiter module in JavaScript that works seamlessly across browser fetch calls and Node.js HTTP clients. Use clean ES exports, JSDoc annotations, and include Jest tests, performance profiling, and browser polyfill recommendations. | pass→fail | 39,472 | 38,684 | -2% | 1 | 1 | 0% | 8,238 | 8,602 | +4% | 0 | 0 | — |
▸case-11 Create a modern JavaScript utility containing debounce and throttle functions with trailing/leading options. Must run in both Node.js and browser contexts without environment-specific crashes. Provide JSDoc, Jest unit tests, profiling data, and browser polyfill notes. | fail→pass | 37,268 | 32,223 | -14% | 1 | 1 | 0% | 8,239 | 7,442 | -10% | 0 | 0 | — |
▸case-12 Develop a universal JavaScript storage abstraction adapter that falls back gracefully between IndexedDB in browsers and in-memory Map in Node.js environments. Output clean ES exports, Jest tests, JSDoc documentation, performance profiling benchmarks, and browser polyfill guidance. | pass→pass | 35,803 | 27,888 | -22% | 1 | 1 | 0% | 8,239 | 6,309 | -23% | 0 | 0 | — |
▸case-13 Create a modern JavaScript data pipeline module using async generators to stream and transform large datasets in chunks. Include JSDoc comments, Jest tests with async iteration patterns, profiling results, and polyfill details. | fail→pass | 40,424 | 26,063 | -36% | 1 | 1 | 0% | 8,229 | 5,736 | -30% | 0 | 0 | — |
▸case-14 Convert this legacy function prototype-based event emitter (`function Emitter() {} Emitter.prototype.on = ...`) to modern ES class syntax with Private fields (`#listeners`). Ensure cross-environment support, JSDoc, Jest async event tests, performance profiling, and polyfill strategy. | fail→pass | 41,780 | 26,603 | -36% | 1 | 1 | 0% | 8,248 | 5,954 | -28% | 0 | 0 | — |
▸case-15 Write a modern JavaScript HTTP request retrier that uses AbortController for timeout cancellation and exponential backoff. The code must be universal for browser and Node.js environments. Provide JSDoc annotations, Jest tests, performance profiling metrics, and polyfill strategies. | fail→pass | 40,629 | 38,400 | -5% | 1 | 1 | 0% | 8,241 | 8,415 | +2% | 0 | 0 | — |
▸case-16 Construct a modern JS helper function that lazily loads ES modules dynamically with failure fallback and caching. Require JSDoc annotations, Jest test suite, performance profiling metrics, and browser polyfill strategy for import(). | pass→pass | 37,371 | 33,509 | -10% | 1 | 1 | 0% | 7,223 | 7,145 | -1% | 0 | 0 | — |
▸case-17 Write high-performance functional array utilities (`chunk`, `flatZip`, `partitionAsync`) in pure JavaScript using ES6+ features without external dependencies. Provide JSDoc annotations, clean ES exports, Jest unit tests, profiling metrics, and browser polyfill strategy. | pass→pass | 42,234 | 28,485 | -33% | 1 | 1 | 0% | 8,242 | 6,110 | -26% | 0 | 0 | — |
▸case-18 Build a universal JavaScript WebSocket manager that handles automatic reconnection with backoff jitter and message queuing while offline. Include JSDoc annotations, Jest tests mocking WebSocket connections, performance profiling, and browser polyfill guidance. | fail→pass | 31,784 | 32,845 | +3% | 1 | 1 | 0% | 7,126 | 7,028 | -1% | 0 | 0 | — |
▸case-19 Design a lightweight asynchronous worker pool module in JS that delegates computationally heavy tasks off the main thread when available. Output JSDoc, clean ES exports, Jest test suite, performance profiling analysis, and polyfill strategy. | fail→pass | 41,233 | 38,553 | -6% | 1 | 1 | 0% | 8,232 | 8,089 | -2% | 0 | 0 | — |
▸case-20 Create a modern JavaScript wrapper function `withRetryAndBoundary` that catches async errors, logs formatted stack traces, and executes custom fallback routines. Include JSDoc, Jest test cases, performance profiling, and browser polyfill strategy. | fail→pass | 23,525 | 28,592 | +22% | 1 | 1 | 0% | 5,017 | 6,232 | +24% | 0 | 0 | — |
▸case-21 Write a modern JavaScript utility function `deepFreeze` that recursively freezes objects and prevents prototype pollution. Provide JSDoc comments, clean ES exports, Jest test suite, performance profiling, and polyfill strategy. | fail→pass | 53,526 | 27,076 | -49% | 1 | 1 | 0% | 8,230 | 4,479 | -46% | 0 | 0 | — |
▸case-22 Implement an asynchronous task priority scheduler in modern JS that executes high-priority microtasks ahead of low-priority tasks. Output JSDoc comments, ES module exports, Jest tests, performance profiling, and browser polyfills. | fail→fail | 35,948 | 34,112 | -5% | 1 | 1 | 0% | 7,276 | 7,349 | +1% | 0 | 0 | — |