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Iterator pattern provides a way to access each element in a collection object sequentially without exposing the internal representation of the object, which can not only not expose the internal structure of the collection, but also allow external code to transparently access the internal elements of the collection. The specific structure diagram is shown below.From basic skills to methodology to character and mode of thinking, it is a process from "skill" to "Tao". However, unfortunately, many people blindly worship "Tao" and despise "Shu", but they do not know that the real Tao comes from the accumulation of Shu and the natural process from quantitative change to qualitative change. Without solid basic skills and systematic methodology, it is ignorant and opportunistic to talk about the so-called "philosophy, art and character" and rely on beautiful words and high-profile rhetoric to attract attention. Experience does not necessarily translate into theory, and scattered knowledge points do not necessarily rise to system integration. However, due to the lack of basic foundation and knowledge accumulation, the so-called "investment philosophy" can only be a joke. "Avenue to Jane" and "Avenue to Connect" are logically reasonable, because there are only a few great principles after high abstraction, but the difference between "technique" is very large because it is very meticulous. Therefore, what really troubles people is the process of combining and refining from art to Tao.如果是那样的话，西楚国才是真正陷入战争的泥潭之中，还不如集中兵力先解决齐国这块目前最严重的问题。呵呵，这你就不懂了。交警刘政文赶上了三件烦心事。一，妻子李华和他分了居，她觉得刘政文没有生活情趣，家庭生活让她倍感压抑，李华说如果分居让两人都舒服的话，就离婚；二，刘政文接收了一个13岁的女孩马小乐，马小乐的单亲父亲马建国肇事逃逸被判刑，马小乐无处可去，刘政文心头一热就收养了她。麻烦的是马小乐天生叛逆不服管教，从来没管过孩子的刘政文也不免抓耳搔腮；三，刚从刑警队调来的龙晓雪对他仰慕不已，他对龙晓雪没有任何感觉 ，刘政文的徒弟萧强却一直对龙晓雪紧追不舍，刘政文不知如何解决这个棘手问题，眉头上的褶纹更深了。不过，大部分人都是踩着滑雪板，拄着滑雪杖斜蹓上去的，只有几个小娃儿坐在雪橇上，带的东西也放在雪橇上。从非法赌博到操纵比赛，在这部受真实事件启发的戏剧中，发现曾经备受推崇的泰拳运动背后肮脏的黑社会。