@cycxllin/cmpt315-a2/countNumberOfArrays.js

Fulfills CMPT 315 Assignment 2, MacEwan University Winter 2024.

/*
Return the count for the number of arrays inside a given array.
Parameters: array
Returns: number of arrays within given array
    -1 if error occurs
*/

function countNumberOfArrays(arr){
    if (Array.isArray(arr)){
        return count = _countArrays(arr);
    } else {
        console.error("Error: Parameter passed is not an array");
        return -1;
    }
}

/*
(Private) Recursive function for counting number of arrays
Parameters: array, count (number)
Returns: number of arrays
 */
function _countArrays(arr, count=0){
    arr.forEach(element => {
        if (Array.isArray(element)){
            count += 1;
            _countArrays(element, count)
        }
    });
    return count;
}

module.exports = countNumberOfArrays;