Gremlin:图遍历语言

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Gremlin:图遍历语言

Gremlin简介 Gremlin是Apache TinkerPop 框架下的图遍历语言.Gremlin是一种函数式数据流语言,可以使得用户使用简洁的方式表述复杂的属性图(property graph)的遍历或查询.每个Gremlin遍历由一系列步骤(可能存在嵌套)组成,每一步都在数据流(data stream)上执行一个原子操作. Gremlin包括三个基本的操作: map-step 对数据流中的对象进行转换: filter-step 对数据流中的对象就行过滤: sideEffect-step…

DS图遍历--深度优先搜索

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PAT A1134 Vertex Cover （25 分）——图遍历

A vertex cover of a graph is a set of vertices such that each edge of the graph is incident to at least one vertex of the set. Now given a graph with several vertex sets, you are supposed to tell if each of them is a vertex cover or not. Input Specif…

PAT A1034 Head of a Gang （30 分）——图遍历DFS，字符串和数字的对应保存

One way that the police finds the head of a gang is to check people's phone calls. If there is a phone call between A and B, we say that A and B is related. The weight of a relation is defined to be the total time length of all the phone calls made b…

PAT A1013 Battle Over Cities （25 分）——图遍历，联通块个数

It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any other highways to keep the rest of…