Question

你们如何利用追溯性延伸构建一个简单的模拟发动机? 例如,在座标上有以下几类:<代码>Motor,其特性为IsPowered和Speed。页: 1 有效改为:Speed r 每秒100秒,每秒10个总管。

在预知该类及其特性的情况下,用这个比喻来提一下。相反,模拟发动机获得了可观察到的财产变化流,通过创造更多的财产变化作出反应,其中许多变化是随着时间的推移在水泥中进行的。这样的APIC可能看起来像什么?

Answer 1

模拟预报器需要一种类型来代表财产变更和一种有出入的模拟方法<代码>。 IObservable<T> stream of change. 模拟发动机的实施将包括针对即将进行的财产变化做出反应的规则,以更新产出流。

The type would be like this (although a struct would probably be better than a class):

class PropertyChange
{
    public PropertyChange(string name, object value) { Name = name; Value = value; }
    public string Name { get; private set; }
    public object Value { get; private set; }
}

模拟方法将考虑如下。为了证明多种规则,该守则预先假定财产IsLightOn,即仅轨道上Isted。

IObservable<PropertyChange> Simulate(IObservable<PropertyChange> incomingChanges)
{
    var isLightOnRule =
        from c in incomingChanges
        where c.Name == "IsPowered"
        select new PropertyChange("IsLightOn", c.Value);

    var ramp = Observable.Generate(0, speed => (speed <= 1000), speed => speed + 10, speed => new PropertyChange("Speed", speed), _ => TimeSpan.FromSeconds(1));
    var speedRule = incomingChanges
        .Where(c => c.Name == "IsPowered" && (bool)c.Value)
        .SelectMany(ramp);

    // Add more rules here.

    return Observable.Merge(isLightOnRule, speedRule /* merge more rules here */);
}

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