我如何分解这段代码以避免 C# 中的代码重复？

发布于 2024-12-28 03:44:45 字数 754 浏览 2 评论 0 原文

我有以下代码：

private int AllFeb(Forecast f, IRepository repository)
{
    return All(f, repository, f.Feb);
}

private int AllJan(Forecast f, IRepository repository)
{
    return All(f, repository, f.Jan);
}

private int All(Forecast f, IRepository repository, int callBk)
{
    var otherForecasts = repository.Query<Forecast>().Where(r => r.PersonId == f.PersonId);
    if (otherForecasts.Any())
    {
        return otherForecasts.Sum(r => r.Feb) + callBk;
    }
    return 0;
}

如您所见，我试图提出一个可以为每个月。问题是我需要在 All 方法中使用以下行：

otherForecasts.Sum(r => r.Feb)

是通用的，但我需要从外部传递 Sum 方法内的回调（因为我不'不希望将其硬编码为 r.Feb。

有什么方法可以避免这里出现代码重复吗？

原文

I have the following code:

private int AllFeb(Forecast f, IRepository repository)
{
    return All(f, repository, f.Feb);
}

private int AllJan(Forecast f, IRepository repository)
{
    return All(f, repository, f.Jan);
}

private int All(Forecast f, IRepository repository, int callBk)
{
    var otherForecasts = repository.Query<Forecast>().Where(r => r.PersonId == f.PersonId);
    if (otherForecasts.Any())
    {
        return otherForecasts.Sum(r => r.Feb) + callBk;
    }
    return 0;
}

As you can see, I am trying to come up with a shared function that can be reused for every
month. The issue is that I need the following line in the All method:

otherForecasts.Sum(r => r.Feb)

to be generic but I need the callback inside the Sum method to be passed from outside (since I don't want it to be hardcoded as r.Feb.

Is there any way to avoid having code duplication here?

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不忘初心 2025-01-04 03:44:45

将 Expression> 传递到 All() 方法中。

private int AllFeb(Forecast f, IRepository repository)
{
    return All(f, repository, f.Feb, r => r.Feb);
}

private int AllJan(Forecast f, IRepository repository)
{
    return All(f, repository, f.Jan, r => r.Jan);
}

private int All(Forecast f, IRepository repository, int callBk, Expression<Func<Forecast, int>> projection)
{
    var otherForecasts = repository.Query<Forecast>().Where(r => r.PersonId == f.PersonId);
    if (otherForecasts.Any())
    {
        return otherForecasts.Sum(projection) + callBk;
    }
    return 0;
}

Pass an Expression<Func<Forecast, int>> into the All() method.

private int AllFeb(Forecast f, IRepository repository)
{
    return All(f, repository, f.Feb, r => r.Feb);
}

private int AllJan(Forecast f, IRepository repository)
{
    return All(f, repository, f.Jan, r => r.Jan);
}

private int All(Forecast f, IRepository repository, int callBk, Expression<Func<Forecast, int>> projection)
{
    var otherForecasts = repository.Query<Forecast>().Where(r => r.PersonId == f.PersonId);
    if (otherForecasts.Any())
    {
        return otherForecasts.Sum(projection) + callBk;
    }
    return 0;
}

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