tsgammon-core/engines/Matrix.js

A Backgammon library for Typescript, formerly developed as a part of tsgammon-ui

"use strict";
/**
 *
 * 行列計算の簡易な実装
 *
 * @module
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.add = exports.product = exports.matrix2d = void 0;
function matrix2d(value) {
    return {
        arr: value,
        rowsN() {
            return this.arr.length;
        },
        colsN() {
            return this.arr.length === 0 ? 0 : this.arr[0].length;
        },
    };
}
exports.matrix2d = matrix2d;
function product(m1, m2) {
    if (m1.colsN() !== m2.rowsN()) {
        throw Error();
    }
    const mp = m1.arr.map((rowValues, i) => {
        // rowValues = [a, b]
        const newRow = Array(m2.colsN()).fill(0);
        return newRow.map((v, j) => {
            return m1.arr[i]
                .map((v, ii) => {
                return m2.arr[ii][j] * v;
            })
                .reduce((a, b) => a + b);
        });
    });
    return matrix2d(mp);
}
exports.product = product;
function add(m1, m2) {
    if (m1.rowsN() !== m2.rowsN() || m1.colsN() !== m2.colsN()) {
        throw Error();
    }
    return matrix2d(m1.arr.map((row, i) => {
        return row.map((value, j) => m2.arr[i][j] + value);
    }));
}
exports.add = add;