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High-performance Java Dataframe with integrated columnar storage (fork of tablesaw)

There is a newer version: 0.9.1

package org.datavec.dataframe.columns;

import org.datavec.dataframe.api.ShortColumn;
import org.datavec.dataframe.filtering.ShortBiPredicate;
import org.datavec.dataframe.filtering.ShortPredicate;
import it.unimi.dsi.fastutil.shorts.ShortIterable;

/**
 *
 */
public interface ShortColumnUtils extends Column, ShortIterable {

    ShortPredicate isZero = i -> i == 0;

    ShortPredicate isNegative = i -> i < 0;

    ShortPredicate isPositive = i -> i > 0;

    ShortPredicate isNonNegative = i -> i >= 0;

    ShortPredicate isEven = i -> (i & 1) == 0;

    ShortPredicate isOdd = i -> (i & 1) != 0;

    ShortBiPredicate isGreaterThan = new ShortBiPredicate() {
        @Override
        public boolean test(short valueToTest, int valueToCompareAgainst) {
            return valueToTest > valueToCompareAgainst;
        }
    };

    //ShortBiPredicate isGreaterThan = (valueToTest, valueToCompareAgainst) -> valueToTest > valueToCompareAgainst;

    ShortBiPredicate isGreaterThanOrEqualTo =
                    (valueToTest, valueToCompareAgainst) -> valueToTest >= valueToCompareAgainst;

    ShortBiPredicate isLessThan = (valueToTest, valueToCompareAgainst) -> valueToTest < valueToCompareAgainst;

    ShortBiPredicate isLessThanOrEqualTo = (valueToTest, valueToCompareAgainst) -> valueToTest <= valueToCompareAgainst;

    ShortBiPredicate isEqualTo = (valueToTest, valueToCompareAgainst) -> valueToTest == valueToCompareAgainst;

    ShortPredicate isMissing = i -> i == ShortColumn.MISSING_VALUE;
    ShortPredicate isNotMissing = i -> i != ShortColumn.MISSING_VALUE;
}