Java Script Solution for Array Reduce Transformation Problem
Intuition\n Describe your first thoughts on how to solve this problem. \nThe given code implements the reduce function, which applies a given function to each e
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\nThe given code implements the reduce function, which applies a given function to each element of an array, accumulating the results into a single value. The reduce function takes an array, a function, and an initial value as input parameters.\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n- Initialize the accumulator variable with the provided initial value.\n- Iterate over each element in the given array using a for...in loop.\n- Apply the given function to the current element and the accumulator, updating the accumulator with the result.\n- Return the final value of the accumulator after iterating through all elements in the array.\n\n# Complexity\n- Time complexity:\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\nThe time complexity of this solution is O(n), where n is the number of elements in the input array. The code iterates over each element in the array exactly once.\n\n- Space complexity:\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\nThe space complexity is O(1) because the code only uses a constant amount of additional space to store the accumulator and loop variables. The space usage does not depend on the size of the input array.\n\n# Code\n```\n/**\n * @param {number[]} nums\n * @param {Function} fn\n * @param {number} init\n * @return {number}\n */\nvar reduce = function(nums, fn, init) {\n    let accumulator = init;\n  for (const index in nums) {\n    accumulator = fn(accumulator, nums[index]);\n  } \n  return accumulator;\n};\n```
['JavaScript']