Welcome to the Lounge

var name = "Blah";

var people = new List<Person>();

var data = SomeFunction();

auto i = small integer // seems rather silly, and obscures signed/unsigned
auto v = some complex STL type // is handy
auto l = some big elephanting lambda // is required, and why they added it

• It forces you to initialize the variable.
• If the variable is initialized by calling a function, and that function's return type changes, the code might not even be affected.
• Some type names are long or complicated, and I hate spilling lines.

auto i = 2;
auto j = 3;
auto k = i/j;
auto f = 2./j;
// f != k
// any similarity with FORTRAN is intentional

for(auto i = 0...

GuyThiebaut wrote:

The advantage of var is if "<a href="http://someapi">http://someapi</a>" was a variable or class instance instead of a string literal and you changed its type, you would not then need to refactor the code elsewhere.

obermd wrote:

Absolutely not true. Changing a data type and then attempting to use it elsewhere is guaranteed to cause you to have to modify code everywhere it's used.

GuyThiebaut wrote:

The advantage of var is if "http://someapi" was a variable or class instance instead of a string literal and you changed its type, you would not then need to refactor the code elsewhere.

ZurdoDev wrote:

This feels lazy to me but I am open minded and am curious if I am missing something. Is there some benefit to declaring most things var instead of what they actually are? In the case above, a string.

Marc Clifton wrote:

var complicatedDictionary = new Dictionary<SomeKey, List<KeyValue>>();

and worse, I like definitely like it.

Dictionary<SomeKey, List<KeyValue>> complicatedDictionary = new *();

dim complicatedDictionary as New Dictionary(of SomeKey, List(KeyValue))

OriginalGriff wrote:

that would be a more natural way of showing what the type

Marc Clifton wrote:

In most cases, the compiler should be able to figure out what foo is by inspecting its usage in the code!

To alcohol! The cause of, and solution to, all of life's problems - Homer Simpson

Dictionary<SomeKey, List<KeyValue>> complicatedDictionary = new ();

MyMostExcellentBaseClassOfAllClassesInTheWholeWorld myClass = new MyMostExcellentBaseClassOfAllClassesInTheWholeWorld();

var myClass = new MyMostExcellentBaseClassOfAllClassesInTheWholeWorld();