Java Utililty Methods Vector Normalize

double res = 0.0;
for (double elem : v) {
    res = res + elem * elem;
return Math.sqrt(res);

return Math.sqrt(vectorDotProduct(vector, vector));

if (vector == null) {
    throw new NullPointerException("Null vector@vectorNorm!");
double temp = 0;
for (int i = 0; i < vector.length; i++) {
    temp += vector[i] * vector[i];
return Math.sqrt(temp);
...

float result = 0;
for (float aV : v) {
    result += aV * aV;
result = (float) Math.sqrt(result);
return result;

double[] result = new double[v.length];
double sum = 0;
for (double d : v) {
    sum += d;
for (int i = 0; i < v.length; i++) {
    result[i] = v[i] / sum;
return result;

float[] out = new float[in.length / veclen];
for (int i = 0, k = 0; i < out.length; i++) {
    out[i] = 0;
    for (int j = 0; j < veclen; j++, k++)
        if (in[k])
            out[i] += 1;
return out;
...