Lazy programming…
I’ve been working alot with web services lately, querying for information and recordsets, applying business logics and then finally displaying it all on a web page. A problem that I need to deal with (it feels like) all the time is empty responses from the service layer.
Sometime the response is null, sometimes not. Sometimes inner collections of a response are empty, null… anyway, it end up with alot of theese:
if (products != null)
{
foreach (Product product in products)
{
// do something with product
}
}
Doing these if-nulls over and over again made me realize that I needed an NeverNullEnum wrapper, here it is:
public static IEnumerable<T> NeverNullEnum<T>(IEnumerable<T> e)
{
if (e != null)
foreach (T obj in e)
if (obj != null)
yield return obj;
}
Now, with this nice wrapper function I can reduce my initial code to this:
foreach (Product product in NeverNullEnum(products))
{
// do something with product
}
- petter
