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Tensorics is a java framework which uses a tensor as a central object. A tensor represents a set of values placed in an N-dimensional space. Wherever you are tempted to use maps of maps, a tensor might be a good choice ;-) Tensorics provides methods to create, transform and performing calculations with those tensors.

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/**
 * Copyright (c) 2016 European Organisation for Nuclear Research (CERN), All Rights Reserved.
 */

package org.tensorics.core.functional;

/**
 * Represents a function with eight arguments.
 * 
 * @param  the first argument type
 * @param  the second argument type
 * @param  the third argument type
 * @param  the fourth argument type
 * @param  the fifth argument type
 * @param  the sixth argument type
 * @param  the seventh argument type
 * @param  the eighth argument type
 * @param  the result type
 */
@FunctionalInterface
public interface Func8 extends FiniteArgumentFunction {

    R apply(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8);

    @Override
    @SuppressWarnings("unchecked")
    default FuncN toFuncN() {
        return args -> apply((T1) args[0], (T2) args[1], (T3) args[2], (T4) args[3], (T5) args[4], (T6) args[5],
                (T7) args[6], (T8) args[7]);
    }

    @Override
    default int numberOfArgs() {
        return 8;
    }
}