public static MonadPlus <TSource> Where <TSource>(
this MonadPlus <TSource> @this,
Func <TSource, bool> predicate)
{
Require.NotNull(@this, nameof(@this));
Require.NotNull(predicate, nameof(predicate));
return(@this.Bind(val => predicate(val) ? MonadPlus <TSource> .η(val) : MonadPlus <TSource> .Zero));
}
public static MonadPlus <TResult> Select <TSource, TResult>(
this MonadPlus <TSource> @this,
Func <TSource, TResult> selector)
{
Require.NotNull(@this, nameof(@this));
Require.NotNull(selector, nameof(selector));
return(@this.Bind(val => MonadPlus <TResult> .η(selector(val))));
}
