The basic version I got down fast, just return a function from a function, done.
Start by implementing the simple curried sum for two arguments, then generalize using recursion and a sentinel value (like no argument) to accumulate the total. Explain the concept of currying and how the generalized version leverages closures to maintain state across chained calls.
Pro tip: Mention that the generalized curried function can be implemented elegantly using recursion and a check for undefined arguments, but also discuss potential pitfalls like infinite recursion if not handled properly. Show awareness of real-world use cases and trade-offs.
Restate the problem to ensure understanding: first implement a curried function for two arguments, then extend it to accumulate any number of arguments until called with no argument.
Write a function that takes the first argument and returns a function that takes the second argument and returns their sum. This demonstrates the core concept of currying.
Modify the function to accept an arbitrary number of arguments by using recursion: if an argument is provided, add it to the accumulated sum and return a new function; if no argument is provided, return the total.
Discuss how to detect the termination condition (e.g., calling with no arguments or undefined) and ensure the function doesn't recurse infinitely. Consider using a default parameter or checking arguments.length.
Compare the recursive curried approach with other patterns (e.g., using a class or closure with a reset method) and discuss readability, performance, and practical use cases.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.