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ArrayUtils.java

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package utils;

public class ArrayUtils {

public static double[] toArray(Double[] data){

double[] result = new double[data.length];

for (int i = 0; i <data.length ; i++) {

result[i] = data[i].doubleValue();

}

return result;

}

public static double[][] toArray(Double[][] data){

double[][] result = new double[data.length][];

for (int i = 0; i <data.length ; i++) {

result[i] = new double[data[i].length];

for (int j=0; j<result[i].length; ++j){

result[i][j] = data[i][j].doubleValue();

}

}

return result;

}

}