On Tuesday, 28 February 2012 at 08:38:10 UTC, Mikael Lindsten
wrote:
Coming from the Java/C# world, not distinguishing between an
empty array
and null feels strange to me. Is this so for strings as well?
...and in
Pedros example, if you assign null to b and then try to access
b.length,
don't you get a NullPointerException? What am I missing?
/ Mikael
string is an array, alias immutable(char)[], so the same rules
apply.
There is no NullPointerException, it is a segfault/Access
Violation/Bus Error.
An empty array and a null array are equal. And this definition
does work well.
You can distinguish between an empty array and a null array by
using the 'is' operator. What is pointed out here is that an
empty array literal, [], is null while an empty array is not.
This behavior is easy to explain in terms sf why, but may not be
a good choice for sake of consistency.
