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这话说的……张老爷子也乐了。Next, we will enter the code writing phase of the state mode. First, we will define three state classes, namely offLightState, WeakLightState and strongLightState. All three classes have a prototype method buttonWasPressed, which represents the behavior that will occur when the button is pressed in their respective states. The code is as follows:因为以他对大苞谷的了解，既然不肯认这门亲，连家人也不告诉，心中定有准备，到时随他怎么掰扯应对吧。Ten, Terrain Modeling, Road Projection and Surface Plant GenerationFor example, if we want to implement a JS function, Such as form validation, Then if we don't use the policy pattern in javascript described in the previous chapter to solve the form validation encapsulation code, It is a temporary form validation function written by itself. Certainly without any encapsulation, Then at this time, we will pop up a prompt to the user for whether the two values are equal. If there is a form verification on another page, their judgment method and business logic are basically the same, but the comparison parameters are different. Should we consider writing a form verification code again? So now we can consider using the template method pattern to solve this problem. Common methods are extracted, and different methods are implemented by specific subclasses. This design code also has the advantages of stronger scalability and better code ~最可怕的，应是人类。一档直播广播节目。对读者来信感到奇怪的工作人员使节目继续，却发生了意想不到的事情……