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Co-Authored-By: 狸花猫/Claude-Qwen3.6-Plus 🐾
69 lines
1.9 KiB
JavaScript
69 lines
1.9 KiB
JavaScript
"use strict";
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/**
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* @file To get graph essencial information.
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* @file.zh-CN 获取图的基本信息
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* @module essence
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*/
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.hasSelfLoop = exports.isNullGraph = exports.isSimpleGraph = exports.isGraph = void 0;
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var Graph_1 = __importDefault(require("../Graph"));
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/**
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* @description Check if the object is a graph.
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* @description.zh-CN 检查对象是否为图。
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*/
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function isGraph(obj) {
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return obj instanceof Graph_1.default;
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}
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exports.isGraph = isGraph;
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/**
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* @description Check if the graph is a simple graph.
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* @description.zh-CN 检查图是否为简单图。
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*/
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function isSimpleGraph(graph) {
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if (graph.isMultigraph()) {
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return false;
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}
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var edges = graph.edges();
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var edgeStack = new Map();
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for (var i = 0; i < edges.length; i++) {
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var edge = edges[i];
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if (edge.v === edge.w) {
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return false;
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}
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var _a = [edge.v, edge.w].sort(), v = _a[0], w = _a[1];
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var key = "".concat(v, "-").concat(w);
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if (edgeStack.has(key)) {
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return false;
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}
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edgeStack.set(key, true);
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}
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return true;
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}
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exports.isSimpleGraph = isSimpleGraph;
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/**
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* @description Check if the graph is a null graph.
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* @description.zh-CN 检查图是否为空图。
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*/
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function isNullGraph(graph) {
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return graph.nodes().length === 0;
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}
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exports.isNullGraph = isNullGraph;
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/**
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* @description Check if the graph contains Self loops.
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* @description.zh-CN 检查图是否包含自环。
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*/
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function hasSelfLoop(graph) {
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var edges = graph.edges();
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for (var i = 0; i < edges.length; i++) {
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var edge = edges[i];
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if (edge.v === edge.w) {
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return true;
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}
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}
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return false;
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}
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exports.hasSelfLoop = hasSelfLoop;
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