public static T remove()

in accord-core/src/main/java/accord/utils/RelationMultiMap.java [762:824]
55 lines of code
13 McCabe index (conditional complexity)

    public static <K, K2, V, T> T remove(T from, K[] keys, V[] oldValues, int[] oldKeysToValues, Predicate<V> remove, T none, IntFunction<V[]> newValueArray,
                                     K2 passthroughKeys, SimpleConstructor<K2, V[], T> constructor)
    {
        if (isEmpty(keys, oldKeysToValues))
            return from;

        IntBuffers cache = ArrayBuffers.cachedInts();
        int[] remapValue = cache.getInts(oldValues.length);
        int[] newKeyToValue = null;
        V[] newValues;
        int o;
        try
        {
            int count = 0;
            for (int i = 0 ; i < oldValues.length ; ++i)
            {
                if (remove.test(oldValues[i])) remapValue[i] = -1;
                else remapValue[i] = count++;
            }

            if (count == oldValues.length)
                return from;

            if (count == 0)
                return none;

            newValues = newValueArray.apply(count);
            for (int i = 0 ; i < oldValues.length ; ++i)
            {
                if (remapValue[i] >= 0)
                    newValues[remapValue[i]] = oldValues[i];
            }

            newKeyToValue = cache.getInts(oldKeysToValues.length);
            int k = 0, i = keys.length;
            o = i;
            while (i < oldKeysToValues.length)
            {
                while (oldKeysToValues[k] == i)
                    newKeyToValue[k++] = o;

                int remapped = remapValue[oldKeysToValues[i]];
                if (remapped >= 0)
                    newKeyToValue[o++] = remapped;
                ++i;
            }

            while (k < keys.length)
                newKeyToValue[k++] = o;
        }
        catch (Throwable t)
        {
            cache.forceDiscard(newKeyToValue);
            throw t;
        }
        finally
        {
            cache.forceDiscard(remapValue);
        }

        newKeyToValue = cache.completeAndDiscard(newKeyToValue, o);
        return constructor.construct(passthroughKeys, newValues, newKeyToValue);
    }