Java Utililty Methods Array Sum

assert values != null;
double sum = 0d;
for (double value : values) {
    sum += value;
return sum;

double ret = 0;
for (int i = 0; i < a.length; i++) {
    ret += a[i];
return ret;

double b = 0;
for (int ii = 0; ii < a.length; ii++) {
    b += a[ii];
return b;

if (a.length != b.length) {
    throw new IllegalArgumentException(
            "Error computing sum in Utilities.sum: arrays should have the same length");
double[] sum = new double[a.length];
for (int i = 0; i < a.length; i++) {
    sum[i] = a[i] + b[i];
return sum;

double[] result = new double[a.length];
for (int i = 0; i < a.length; i++) {
    result[i] = a[i] + b[i];
return result;

double result = 0;
for (final double a : aArray) {
    result += a;
return result;

double result = 0;
for (double addend : addends)
    result += addend;
return result;

double out = 0;
for (int i = 0; i < array.length; i++)
    out += array[i];
return out;

double sum = 0;
for (double d : array) {
    sum += d;
return sum;

double total = 0;
for (double add : array)
    total += add;
return total;