'use strict'

module.exports = {
	aritGeo: function(numlist) {
		if (numlist.length === 0) {
			return 0;
		}
	}
}
'use strict'

module.exports = {
	aritGeo: function(numlist) {
		if (!Array.isArray(numlist)) {
			return null;
		}

		if (numlist.length === 0) {
			return 0;
		}
	}
}
Implement aritGeo case for non-arrays
Implement aritGeo case for non-arrays
