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板栗和小葱等人虽然对百姓微笑致意，却不曾呼喊喝叫，一直维持肃穆军威。After so much experience and accumulation, Mao Zedong said this when he met with the Zambian President in 1974:北宋时，北狄王带兵进犯边关，兵部尚书李绶的长子李彦荣奉朝廷之命，带兵马前去抵抗。奸臣王强扣住军粮，使彦荣兵马被困，又乘机诬奏彦荣叛国投敌。朝廷偏听偏信，将李绶问成死罪押入监牢，将其全家查抄赶出汴梁。全家逃返苏州去投靠姻亲黄璋，没想到黄璋见李家遭了厄运，反目无情，硬要退婚。女儿桂英至死不依，发誓不与他人婚配。In programming, Sometimes it is necessary to generate a large number of fine-grained class instances to represent data. If we can find that these instances are basically the same except for a few parameters, if we can move those parameters outside the class instances and pass them in when the method is called, we can greatly reduce the number of individual instances by sharing the website invariantHere we seem to simulate the process of a collection class, does it feel great? In fact, each class in JDK is also these basic things, plus some design patterns and some optimization. As long as we learn and master these things, we can also write our own collection classes and even frameworks!Iterator patterns are created for collection objects, For collection objects, It must involve the addition and deletion of collection elements, and certainly supports the operation of traversing collection elements. If the traversal operation is also placed in the collection object at this time, the collection object will bear too many responsibilities. At this time, the responsibilities can be separated and the traversal of the collection can be placed in another object, which is the iterator object.4-3 Attack 1-2 4-3 Survive, but will become 4-2, thinking that the opponent's attack power is 1 point, so reduce a little health value, but the attack power will not decrease.