CODEWITHSUNDEEP
c#linq
Sebastien F.
Sebastien F.

Reputation: 1729

Any benefit to call Any() over an IEnumerable before enumerating it?

Is there any benefit of calling .Any() on an enumeration right before enumerating it ? For example (granted that list is an IEnumerable): 

if(list != null && list.Any()) 
{
    foreach(var item in list) 
    {
        // do stuff
    }
}

I suspect that it has none, but I'd rather be sure.

Upvotes: 1

Views: 296

Answers (3)

bas
bas

Reputation: 14972

No not really. If the list is empty your foreach loop will simply not iterate.

if(list != null) 
{
    foreach(var item in list) 
    {
        // do stuff
    }
}

Upvotes: 0

Alex Florescu
Alex Florescu

Reputation: 5151

No, no real benefit.

If the list is not null, but empty, foreach will be fine (i.e. it will not throw an exception and it won't enumerate over an empty list). Doing the null check should be enough.

Upvotes: 0

manojlds
manojlds

Reputation: 301337

There is no real benefit, but possible downside to calling Any here as you could be enumerating twice.

A null check should be enough. The foreach will take care of the rest for you.

Upvotes: 2

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