Implement a custom version of the Array.prototype.reduce method and add it to the Array.prototype object as myReduce. The method should iterate over the array, apply a reducer function to each element, and return a single accumulated value.
This function should mimic the behavior of the native reduce() method, including the handling of an optional initial value.
Example Inputs & Outputs
[1, 2, 3].myReduce((acc, val) => acc + val)
// → 6
[1, 2, 3].myReduce((acc, val) => acc + val, 10)
// → 16
[].myReduce((acc, val) => acc + val, 5)
// → 5
[].myReduce((acc, val) => acc + val)
// → TypeError
[1, , 3].myReduce((acc, val) => acc + val)
// → 4
Constraints & Edge Cases
callback must be a function. If not, throw a TypeError.- If no initial value is provided and the array is empty, throw a
TypeError.
- If no initial value is provided, use the first element of the array as the initial value, and start from the second element.
- Do not use the built-in
reduce() method.
