memento
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备忘录模式
Without violating cncapsulation, capture and externalize an object’s internal state so that the object can be restored to this state later.（在不破坏封装性的前提下，捕获一个对象的内部状态，并在该对象之外保存这个状态。）
2017-01-22 pattern-designpattern-designmemento
Without violating cncapsulation, capture and externalize an object’s internal state so that the object can be restored to this state later.（在不破坏封装性的前提下，捕获一个对象的内部状态，并在该对象之外保存这个状态。）