@zfunction/genetics-js
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Genetic and evolutionary algorithms framework for the web
53 lines • 2.8 kB
JavaScript
;
/*
* @license
* Copyright (c) 2019 Cristian Abrante. All rights reserved.
* Licensed under the MIT License. See LICENSE in the project root for license information.
*/
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
var utils_1 = require("../../generator/utils");
var BaseCrossover_1 = require("./BaseCrossover");
var UniformCrossover = /** @class */ (function (_super) {
__extends(UniformCrossover, _super);
function UniformCrossover() {
return _super !== null && _super.apply(this, arguments) || this;
}
UniformCrossover.prototype.cross = function (firstParent, secondParent, individualConstructor, selectionThreshold, engine) {
if (selectionThreshold === void 0) { selectionThreshold = 0.5; }
if (engine === void 0) { engine = utils_1.Generator.DEFAULT_ENGINE; }
return this.crossWith(firstParent, secondParent, { individualConstructor: individualConstructor, selectionThreshold: selectionThreshold, engine: engine });
};
UniformCrossover.prototype.crossWith = function (firstParent, secondParent, params) {
this.checkParams(params);
return _super.prototype.crossWith.call(this, firstParent, secondParent, params);
};
UniformCrossover.prototype.getGenotypeValues = function (firstParent, secondParent, params, index) {
var value = utils_1.Generator.generateProbability(params.engine);
var parentSelectionCondition = value <= params.selectionThreshold;
return {
first: parentSelectionCondition ? firstParent.get(index) : secondParent.get(index),
second: parentSelectionCondition ? secondParent.get(index) : firstParent.get(index),
};
};
UniformCrossover.prototype.checkParams = function (params) {
if (!utils_1.Generator.probabilityIsValid(params.selectionThreshold)) {
throw new Error("Uniform Crossover: selection threshold " + params.selectionThreshold + " should be in range [0.0, 1.0]");
}
};
return UniformCrossover;
}(BaseCrossover_1.BaseCrossover));
exports.UniformCrossover = UniformCrossover;
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