Java Number Min Value min(double a, double b)

Description

Binary min, without handling of special values.

License

Open Source License

Parameter

Parameter	Description
a	First value
b	Second value

Return

minimum

Declaration

public static double min(double a, double b) 

Method Source Code

//package com.java2s;
/*/*from  ww  w .  j a  v  a2 s. c o  m*/
 This file is part of ELKI:
 Environment for Developing KDD-Applications Supported by Index-Structures
    
 Copyright (C) 2015
 Ludwig-Maximilians-Universit?t M?nchen
 Lehr- und Forschungseinheit f?r Datenbanksysteme
 ELKI Development Team
    
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU Affero General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
    
 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Affero General Public License for more details.
    
 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    /**
     * Binary min, <i>without</i> handling of special values.
     *
     * Because of the lack of special case handling, this is faster than
     * {@link Math#min}. But usually, it should be written inline as
     * {@code (a <= b) ? a : b}
     *
     * The result is asymmetric in case of {@code Double.NaN}:<br />
     * {@code MathUtil.min(Double.NaN, 1.)} is 1, but <br />
     * {@code MathUtil.min(1., Double.NaN)} is {@code Double.NaN}.
     *
     * @param a First value
     * @param b Second value
     * @return minimum
     */
    public static double min(double a, double b) {
        return a <= b ? a : b;
    }

    /**
     * Ternary min, <i>without</i> handling of special values.
     *
     * Because of the lack of special case handling, this is faster than
     * {@link Math#min}. But usually, it should be written inline.
     *
     * @param a First value
     * @param b Second value
     * @param c Third value
     * @return minimum
     */
    public static double min(double a, double b, double c) {
        return a <= b ? (a <= c ? a : c) : (b <= c ? b : c);
    }

    /**
     * Quadrary min, <i>without</i> handling of special values.
     *
     * Because of the lack of special case handling, this is faster than
     * {@link Math#min}. But usually, it should be written inline.
     *
     * @param a First value
     * @param b Second value
     * @param c Third value
     * @param d Fourth value
     * @return minimum
     */
    public static double min(double a, double b, double c, double d) {
        return a <= b ? //
                a <= c ? (a <= d ? a : d) : (c <= d ? c : d) //
                : //
                b <= c ? (b <= d ? b : d) : (c <= d ? c : d);
    }

    /**
     * Binary min, <i>without</i> handling of special values.
     *
     * Because of the lack of special case handling, this is faster than
     * {@link Math#min}. But usually, it should be written inline.
     *
     * @param a First value
     * @param b Second value
     * @return minimum
     */
    public static int min(int a, int b) {
        return a <= b ? a : b;
    }

    /**
     * Ternary min, <i>without</i> handling of special values.
     *
     * Because of the lack of special case handling, this is faster than
     * {@link Math#min}. But usually, it should be written inline.
     *
     * @param a First value
     * @param b Second value
     * @param c Third value
     * @return minimum
     */
    public static int min(int a, int b, int c) {
        return a <= b ? (a <= c ? a : c) : (b <= c ? b : c);
    }

    /**
     * Quadrary min, <i>without</i> handling of special values.
     *
     * Because of the lack of special case handling, this is faster than
     * {@link Math#min}. But usually, it should be written inline.
     *
     * @param a First value
     * @param b Second value
     * @param c Third value
     * @param d Fourth value
     * @return minimum
     */
    public static int min(int a, int b, int c, int d) {
        return a <= b ? //
                a <= c ? (a <= d ? a : d) : (c <= d ? c : d) //
                : //
                b <= c ? (b <= d ? b : d) : (c <= d ? c : d);
    }
}

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