c# - C# 的类 Ruby 'unless'？

Question

有没有办法在 C# 中做类似的事情？

即。

i++ unless i > 5;

还有一个例子

weatherText = "Weather is good!" unless isWeatherBad

Answer 1

您可以使用扩展方法实现类似的目的。例如:

public static class RubyExt
{
    public static void Unless(this Action action, bool condition)
    {
        if (!condition)
            action.Invoke();
    }
}

然后像这样使用它

int i = 4;
new Action(() => i++).Unless(i < 5);
Console.WriteLine(i); // will produce 4

new Action(() => i++).Unless(i < 1);
Console.WriteLine(i); // will produce 5

var isWeatherBad = false;
var weatherText = "Weather is nice";
new Action(() => weatherText = "Weather is good!").Unless(isWeatherBad);
Console.WriteLine(weatherText);