Topic: A small problem with vectors

A small problem with vectors

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Posted By: prachi_jain
Posted On: Sunday, August 4, 2002 07:32 AM

Hii friends, I am having a problem....problem goes like this...i m having two vectors say A and B. Both of same capacity. "Vector A" i stored some strings say A1, A1, A2, A2, A3 "Vector B" values are 10, 20, 5, 7, 20 i just want to have the result in two other vectors as "FinalAVector" A1, A2, A3 "FinalBVector" 20, 7, 20 I hope u understand, i need the max of values from the problem. I m trying to do that...but, i m failing in getting the max values in final vector. It's a very small problem..i hope someone can help me to do this. thanks. More>>

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Re: A small problem with vectors

Posted By: Eric_Lindauer
Posted On: Sunday, August 4, 2002 08:34 PM

Of course there must be a million ways to do this, but here's one: create a Map using your strings ( A1, A2, A3 ) as keys, and the largest value ( 10, 20, etc ) as values. Loop through your two vectors, putting a new integer into the map iff it is greater than the current value, ie:



public void sort () {
    Map result = new Hashtable ();
    for ( int i=0; i < stringVector.size (); i++ ) {
        String key = stringVector.get (i);
        Integer value = intVector.get (i);
        if ( result.get (key) != null ) {
            Integer current = (Integer) result.get (key);
            if ( value.intValue () > current.intValue () ) {
                result.put ( key, value );
            }
        } else {
            result.put ( key, value );
        }
    }

    // ... now you can use the map to produce whatever 
    // vectors you need
    Collection uniqueKeys = result.keySet ();
    Collection largestInts = result.valueSet ();

    // ... etc ...
}

Hope this helps.

Eric

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Re: A small problem with vectors

Posted By: Jorgen_Nordqvist
Posted On: Sunday, August 4, 2002 07:47 PM

It would probably help if you pasted a code snippet here to show what the code currently looks like.

Jorgen

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