data.Range Maven / Gradle / Ivy

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package data;

import stats.Statistics;

final class Range {

    private final int[] range;
    private final double[] data;

    private Range(final int from, final int to, final int by) {
        this.range = new int[Math.abs(to - from)];
        this.data = new double[to - from];
        for (int i = 0; i < range.length; i++) {
            range[i] = from + i * by;
            data[i] = from + i * by;
        }
    }

    static Range newRangeExclusive(final int from, final int to) {
        return new Range(from, to, 1);
    }

    static Range newRangeInclusive(final int from, final int to) {
        return new Range(from, to + 1, 1);
    }

    final int[] asArray() {
        return this.range.clone();
    }

    final double sum() {
        return Statistics.sumOf(data);
    }

    Range sliceInclusive(final int from, final int to) {
        return new Range(this.range[from], this.range[to + 1], 1);
    }

    Range sliceExclusive(final int from, final int to) {
        return new Range(this.range[from], this.range[to], 1);
    }

}