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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                # 廣度優先遍歷(BFS) 先訪問一個頂點所有相鄰的頂點,然后再依次訪問每個頂點的相鄰的頂點,以此類推,最終訪問到所有的頂點。 比如,從 0 開始先訪問周圍頂點: ![](https://img.kancloud.cn/03/8c/038cacb06a28a9aea62eeb9f4a491f7a_510x458.png) 再到隔一層的點: ![](https://img.kancloud.cn/28/c2/28c20cc147f3c815753817df8c940275_534x472.png) 然后再隔一層: ![](https://img.kancloud.cn/de/4d/de4dd340ebb87c0062c09370153057b2_522x454.png) # 代碼實現 使用 `隊列` 不斷重放: ![](https://img.kancloud.cn/86/7e/867e56c9bd1a061bf579e676adba8eae_702x1360.png) ~~~ let Colors = { WHITE: 0, GREY: 1, BLACK: 2 }; let initializeColor = vertices => { let color = {}; vertices.forEach(v => color[v] = Colors.WHITE); return color; }; let breadthFirstSearch = (graph, startVertex, callback) => { let vertices = graph.getVertices(); let adjList = graph.getAdjList(); let color = initializeColor(vertices); let queue = new Queue(); queue.enqueue(startVertex); while (!queue.isEmpty()) { let u = queue.dequeue(); adjList.get(u).forEach(n => { if (color[n] === Colors.WHITE) { color[n] = Colors.GREY; queue.enqueue(n); } }); color[u] = Colors.BLACK; if (callback) callback(u); } }; ~~~
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                              哎呀哎呀视频在线观看