How to convert a vector of vectors into a double array?

[tien liu]

Hi,
Could someone please give me pointers on how to convert a vector of vectors into a two-dimensional array?
Each sBank and dBank consists of a name and a number. Output example from the method below:
parseBankPairNames = [[SEAT, 48, SANF, 47, SALT, 46,], [BOST, 3]]
public Vector parseBankPairNames(String sBank, String dBank {
Vector origin = parseBankName(sBank, dBank),
destin = parseBankName(dBank, sBank);
Vector v = new Vector();
v.addElement(origin);
v.addElement(destin);
System.out.println("parseBankPairNames = " + v.toString());

return v;
}
}
Thanks for your help.

[Michael Morris]

Try this:

import java.util.*;
public class VectorOfVectorTest {
    public static Object[][] to2DimArray(Vector v) {
        Object[][] out = new Object[v.size()][0];
        for (int i = 0; i < out.length; i++) {
            out[i] = ((Vector) v.get(i)).toArray();
        }
        return out;
    }
    public static void main(String[] args) {
        Vector v = new Vector();
        for (int i = 0; i < 10; i++) {
            Vector vi = new Vector();
            for (int j = 0; j < i + 1; j++) {
                vi.add(new Integer(j));
            }
            v.add(vi);
        }
        Object[][] out = to2DimArray(v);
        for (int i = 0; i < out.length; i++) {
            for (int j = 0; j < out[i].length; j++) {
                System.out.print(out[i][j].toString() + " ");
            }
            System.out.println("");
        }
    }
}

Michael Morris

[Garrett Smith]

If the depth is variable (sometimes 2d, sometimes 3d), you can use a recursive solution like this.

    public static Object[] getArray(Vector v) {
        Object[] o = v.toArray();
        for(int i = 0; i < o.length; i++)
            if(o[i] instanceof Vector)
                o[i] = getArray((Vector)o[i]);
        return o;
    }

There's probably a more efficient way to do it with a loop construct. Recursion just seemed natural here.

[tien liu]

Hi Michael,
Thanks for the code. It works great for converting a vector of vectors into a double array.
Could you tell me what part of the code to modify for converting a vector (with two values each row) into a double array?
output example: [[BOST, 3]]
Thanks.

[tien liu]

Hi Michael,
Please ignore my last question. The code you sent me works great.

[Michael Morris]

Good, because I've spent the last couple of hours trying to understand what you wanted . I'm glad it all works
Michael Morris