➕ Chained Sum (Curried Function)
Category: js / utils
Difficulty: medium
Here are two different implementations of a curried sum function, one using state within the function and the other using recursion. ✅ Currying with Internal State [code example] Explanation: Internal state tracking : The innerSum.total property is used to store the running total. Chaining : The function returns itself (innerSum) to allow for chaining additional calls. valueOf and toString : These methods are added to ensure that the function behaves like a number in comparisons and string conversions. Currying with Recursion : ```javascript function sum(a) { // Base case value const currentSum = a; // Return a new function that will handle the next value function nextSum(b) { // When called with a new value, create a new sum starting // with the current accumulated value plus the new value return sum(currentSum + b); } // Add valueOf to allow for comparison with primitives nextSum.valueOf = function() { return currentSum; };...