u
方法通常用于处理Unicode字符。使用u.charAt
获取字符串中的指定Unicode字符。php,,
`,,这个代码实现了一个简单的冒泡排序算法,通过自定义的
swap` 函数来交换数组中的元素。javascript,function aStar(startNode, endNode, graph) {, let openSet = [startNode];, let cameFrom = new Map();, , let gScore = new Map();, gScore.set(startNode, 0);, , let fScore = new Map();, fScore.set(startNode, heuristic(startNode, endNode));, , while (openSet.length > 0) {, let current = openSet.reduce((a, b) => fScore.get(a)< fScore.get(b) ? a : b);, , if (current === endNode) {, return reconstructPath(cameFrom, current);, }, , openSet = openSet.filter(node => node !== current);, , for (let neighbor of graph.getNeighbors(current)) {, let tentativeGScore = gScore.get(current) + graph.getCost(current, neighbor);, , if (!gScore.has(neighbor) || tentativeGScore< gScore.get(neighbor)) {, cameFrom.set(neighbor, current);, gScore.set(neighbor, tentativeGScore);, fScore.set(neighbor, tentativeGScore + heuristic(neighbor, endNode));, , if (!openSet.includes(neighbor)) {, openSet.push(neighbor);, }, }, }, }, , return null; // No path found,},,function heuristic(nodeA, nodeB) {, // Example heuristic function (Manhattan distance), return Math.abs(nodeA.x nodeB.x) + Math.abs(nodeA.y nodeB.y);,},,function reconstructPath(cameFrom, current) {, let totalPath = [current];, while (cameFrom.has(current)) {, current = cameFrom.get(current);, totalPath.unshift(current);, }, return totalPath;,},
``,,这个代码实现了A*算法的基本逻辑,包括开放集管理、代价计算以及路径重建。你可以根据具体需求调整启发函数和其他细节。Powered By Z-BlogPHP 1.7.3