@zfunction/genetics-js/lib/selection/implementation/StochasticUniversalSamplingSe.js

Genetic and evolutionary algorithms framework for the web

"use strict";
/*
 * @license
 * Copyright (c) 2019 Cristian Abrante. All rights reserved.
 * Licensed under the MIT License. See LICENSE in the project root for license information.
 */
Object.defineProperty(exports, "__esModule", { value: true });
var utils_1 = require("../../generator/utils");
var base_1 = require("../../individual/numeric/base");
var StochasticUniversalSamplingSe = /** @class */ (function () {
    function StochasticUniversalSamplingSe() {
    }
    StochasticUniversalSamplingSe.prototype.select = function (population, params, cumulativeProbabilityCallback) {
        var mattingPool = [];
        var amount = 1.0 / params.selectionCount;
        var prob = utils_1.Generator.generateFloating(new base_1.NumericRange(0.0, amount));
        var index = 0;
        while (mattingPool.length !== params.selectionCount) {
            var individual = population.getPopulationItem(index).individual;
            var cumulativeProbability = cumulativeProbabilityCallback(population.getPopulationItem(index), index);
            while (prob <= cumulativeProbability) {
                mattingPool.push(individual);
                prob += amount;
            }
            index += 1;
        }
        return mattingPool;
    };
    return StochasticUniversalSamplingSe;
}());
exports.StochasticUniversalSamplingSe = StochasticUniversalSamplingSe;
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