(礼拜三log)前端开发，c foreach 标签 & 点击空白处时禁止Bootstrap模态框消失 & javascript的DFS算法

谁借莪１个温暖的怀抱￠ 2022-08-23 05:39 3阅读 0赞

c:forEach ：循环

<c:forEach var="varity" items="${sessionScope.myList}" varStatus="status">
         
        <c:if test="${status.count%2==0}" >
            <tr bgcolor="lightyellow">
        </c:if>
        <c:if test="${status.count%2!=0}" >
            <tr>
        </c:if>
            <td>Elements</td>
        </tr> 
    </c:forEach>

====================================================

点击空白处时禁止Bootstrap模态框消失：  
很简单，给模态框的div加上：

aria-hidden="true" data-backdrop="static"

即可～

====================================================

DFS算法：（下代码为LeetCode 332. Reconstruct Itinerary）

/** * @param {string[][]} tickets * @return {string[]} */
    var findItinerary = function(tickets) { // DFS深度优先搜索
        var data_map = {};
        var len = tickets.length;
        tickets.forEach(function(item){ 
            if(data_map[item[0]]===undefined){
                data_map[item[0]]= [];
                data_map[item[0]].push(item[1]);
            }else{
                data_map[item[0]].push(item[1]);
            }
        });
        //console.log(data_map);
        var ret = ["JFK"];
        var back = [];
        dfs("JFK");
        return ret;
    
        function dfs(place){ 
            //console.log(ret);
            if(ret.length==(len+1)){
                console.log("return true");
                return true;
            }
    
            var places = data_map[place];
    
            if(places!==undefined && places!==[]){
                places = places.sort();
            }else{
                return false;
            }
            var length_p = places.length;
            for(var i=0;i<length_p;i++){
                console.log(places+"//"+places[0]);
                var item = places.shift();
                ret.push(item);
                if(dfs(item)){
                    console.log("return true2");
                    data_map[place] = places;
                    return true;
                }
                ret.pop();
                places.push(item);
            }
        }
    };