Array.prototype.reduce

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.