pip-services3-commons-node/obj/src/random/RandomDouble.js

Portable abstractions and patterns for Pip.Services in Node.js

"use strict";
/** @module random */
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * Random generator for double values.
 *
 * ### Example ###
 *
 *     let value1 = RandomDouble.nextDouble(5, 10);     // Possible result: 7.3
 *     let value2 = RandomDouble.nextDouble(10);        // Possible result: 3.7
 *     let value3 = RandomDouble.updateDouble(10, 3);   // Possible result: 9.2
 */
var RandomDouble = /** @class */ (function () {
    function RandomDouble() {
    }
    /**
     * Generates a random double value in the range ['minYear', 'maxYear'].
     *
     * @param min   (optional) minimum range value
     * @param max   max range value
     * @returns     a random double value.
     */
    RandomDouble.nextDouble = function (min, max) {
        if (max === void 0) { max = null; }
        if (max == null) {
            max = min;
            min = 0;
        }
        if (max - min <= 0)
            return min;
        return min + Math.random() * (max - min);
    };
    /**
     * Updates (drifts) a double value within specified range defined
     *
     * @param value     a double value to drift.
     * @param range     (optional) a range. Default: 10% of the value
     */
    RandomDouble.updateDouble = function (value, range) {
        if (range === void 0) { range = null; }
        if (range == null)
            range = 0;
        range = range == 0 ? 0.1 * value : range;
        var minValue = value - range;
        var maxValue = value + range;
        return RandomDouble.nextDouble(minValue, maxValue);
    };
    return RandomDouble;
}());
exports.RandomDouble = RandomDouble;
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