checkIfAllZeros.js

// Pulling values recursively from Pie Chart Data

function getSize (obj) {
    return obj.size;
}

function isZero (d) {
    return d.size === 0;
}

function pushValToArray (arr, obj) {
    return arr.push(getSize(obj));
}

function something (dataArr, emptyArr) {
    dataArr.forEach(function (obj) {
        if (obj.children) {
            something(obj.children, emptyArr);
        }
        
        return pushValToArray(emptyArr, obj);
    });
}

function checkForAllZeros (arr) {
    var valsArr = [];

    something(arr, valsArr);

    return valsArr.every(isZero);
}

function main () {
    var arr = this.chartData.slices.children;
    var isAllZeros = checkForAllZeros(arr);

    if (!isAllZeros) { return; }

    throw new errors.AllZeros();
}