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Parallel Colt is a multithreaded version of Colt - a library for high performance scientific computing in Java. It contains efficient algorithms for data analysis, linear algebra, multi-dimensional arrays, Fourier transforms, statistics and histogramming.

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package cern.colt.function.tlong;

/*
 Copyright (C) 1999 CERN - European Organization for Nuclear Research.
 Permission to use, copy, modify, distribute and sell this software and its documentation for any purpose 
 is hereby granted without fee, provided that the above copyright notice appear in all copies and 
 that both that copyright notice and this permission notice appear in supporting documentation. 
 CERN makes no representations about the suitability of this software for any purpose. 
 It is provided "as is" without expressed or implied warranty.
 */
/**
 * Interface that represents a procedure object: a procedure that takes three
 * arguments and does not return a value.
 */
public interface LongLongLongProcedure {
    /**
     * Applies a procedure to three arguments. Optionally can return a boolean
     * flag to inform the object calling the procedure.
     * 
     * 
     * Example: forEach() methods often use procedure objects. To signal to a
     * forEach() method whether iteration should continue normally or terminate
     * (because for example a matching element has been found), a procedure can
     * return false to indicate termination and true to
     * indicate continuation.
     * 
     * @param first
     *            first argument passed to the procedure.
     * @param second
     *            second argument passed to the procedure.
     * @param third
     *            third argument passed to the procedure.
     * @return a flag to inform the object calling the procedure.
     */
    abstract public boolean apply(long first, long second, long third);
}