Empty Array Initialize

[inotetw]

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New rule request

array initialize using [] instead ()

Bad

var emptyArray = [Int]()

Good

var emptyArray: [Int] = []

1. using [] is more common and preferred due to its readability and simplicity. It is a more straightforward way to indicate that you are initializing an empty array of a specific type.
2. using () to initialize an empty array might lead to confusion, as it resembles tuple syntax, which may suggest that you are creating a tuple.

[SimplyDanny]

I think this is a matter of taste. Which style is "good" and which is "bad" is subjective.

For instance, people might like to omit types wherever possible, so they write let b = true, var i = 3, ... and in turn would also prefer let a = [Int]() to be consistent.

That said, this potential new rule should support both styles (by configuration).

[soffes]

If you compare the machine code of these, "Bad" is actually more efficient (and less typing) 😄