@adrianperea/genie.js/lib/chromosomes/chromosome.js

A highly flexible, data-agnostic, and UI-independent Genetic Algorithm Library

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.Chromosome = void 0;

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var Chromosome = /*#__PURE__*/function () {
  function Chromosome(length, generate, mutate) {
    _classCallCheck(this, Chromosome);

    if (length === undefined) {
      throw new Error('length should be defined');
    }

    if (generate === undefined) {
      throw new Error('generate() should be defined');
    }

    this.length = length;
    this.generate = generate;

    if (mutate === undefined) {
      this.mutate = function (genes, rate) {
        return genes.map(function (gene) {
          return Math.random() < rate ? generate() : gene;
        });
      };
    } else {
      this.mutate = mutate;
    }

    this.genes = Array(length).fill(null);
  }

  _createClass(Chromosome, [{
    key: "_init",
    value: function _init() {
      this.genes = this.genes.map(this.generate);
    }
  }, {
    key: "setGenes",
    value: function setGenes(genes) {
      if (genes.length !== this.length) {
        throw new Error("Expected genes of length ".concat(this.length, ". Got ").concat(genes.length));
      }

      this.genes = genes;
    }
  }, {
    key: "copyWithGenes",
    value: function copyWithGenes(genes) {
      var copy = new Chromosome(this.length, this.generate, this.mutate);
      copy.setGenes(genes);
      return copy;
    }
  }, {
    key: "createRandomCopy",
    value: function createRandomCopy() {
      var copy = new Chromosome(this.length, this.generate, this.mutate);

      copy._init();

      return copy;
    }
  }]);

  return Chromosome;
}();

exports.Chromosome = Chromosome;