Each object has its corresponding state, and each state corresponds to some corresponding behaviors. If an object has multiple states, there will be many behaviors. Then the judgment of these states and the behavior completed according to the states will lead to multiple conditional statements, and if a new state is added, the existing code needs to be changed. This kind of design obviously violates the principle of opening and closing, and the state mode is used to solve such problems.2. Second handshake: The server receives SYN message segment. When the server receives the SYN message segment from the client, it needs to confirm the SYN message segment and set the Acknowledge Number to x+1 (Sequence Number+1); At the same time, I also need to send SYN request information, setting SYN position to 1 and Sequence Number to y; The server side puts all the above information into a message segment (i.e. SYN + ACK message segment) and sends it to the client side. At this time, the server enters the SYN_RECV state.菠萝公司，是一家专做日用百货的地区代理商。风平浪静的日子被老板乔语丝和老板娘关秋月突然间提出分头经营的计划所打破，弄的人心惶惶。抠门的乔语丝为了向妻子证明自己的管理能力，花招百出，但二老板高音又是一个特别爱耍小聪明的人，结果导致公司业务发展并不太顺利。不过机灵的销售总监言立为、妩媚多娇的会计胡娜 等公司员工都凭借着自己的能力在公司找到了一席之地。别看菠萝公司的这一群人整天嬉戏打闹，业务上斗智斗勇，但当公司利益受到侵犯或者是某个同事遇到危机的时候，各个都能挺身而出，相互支持。渐渐的，大家一起经历了种种历练，友情也加深了。新年之夜，无法回家的同事和老板一起包起了饺子。温馨的画面让大家发现在职场中有很多值得珍惜的东西：有人情味的同事、纷杂吵闹却很温馨的公司、表面小气内心却很可爱的老板。 在唐朝武则天统治时期，以主管全国特案要案的大理寺为舞台，讲述了大理寺众人，在白猫少卿李饼的带领下，展开各种惊心动魄破案冒险的故事。"The first few hours of the battle were the same as before, We use all kinds of weapons in our hands in our positions. Strike the attacking Vietnamese troops, The exchange of fire was very intense, The front of the position was covered with the bodies of the Vietnamese army. We also have a lot of wounded on our side, However, after all, it is based on strong fortifications. More wounds, less deaths, In particular, the wounded are mainly minor, All of them can continue to fight without getting off the line of fire. At that time, my monitor was quite happy. If you play like this, There's not much pressure to hold position 149, The Vietnamese army that could fight could not even get close 400 meters away from the front of the position, As a result, it was only over an hour after he said this. I remember it was one or two o'clock in the afternoon. Something is wrong, The left and right wings of the position, It's two sparse rain forests, The positive was the same, But before the war, in order to facilitate the offensive forces to assault, All of them have been cut down by Vietnamese troops, But it also broadens our horizons, However, it is still unclear what is going on in the rainforest on both sides. Just when something was wrong, First I heard a "buzzing" sound inside, At first it was a little bit, Later it grew bigger and bigger, At last it was so big that it could almost cover the shot when it was fired. No one in our position knows what's going on, All of them stretched out their heads and looked in the direction of the sound. When the "buzzing" sound reached its peak, they saw that a large area of flying insects flew vertically from the rainforest on both wings. If the number were small, whether the sound or flying insects could not be heard or seen at this distance, but now they could hear clearly.本剧以神奈川·横滨为舞台，刻画了原体育教师刑警·仲井户豪太与头脑粗糙的精英检察官·真岛修平组成搭档，挑战难案并大闹一场的原创电视剧。这部动画片给我们的4个主角（Iro, Jo, Tetsuo和Neeko）出了10个难题，每个主角都会单独来挑战一遍。任务看起来都很简单直接，每一集他们都有3次机会来完成挑战。但是每次尝试都会逐步加大赌注，因此会有明确的战斗升级。我们主角们每次都竭尽全力地来完成这项挑战，以证明自己的能力，可惜每次尝试都会失败。挑战本身有简单的，也有复杂的，但是每个人解决问题的办法又是非常个人化的。Iro想出来的办法，和Jo， Tetsuo或者Neeko想出来的办法就会很不同。因此，整部短剧都是基于角色本身的。但他们都很搞笑，也很擅长运动！
