Do not use type inference for dictionaries and arrays

Does xcode (6.1.1) seem to hang? does compilation seem to take forever? You might be a victim of type inference.
While writing a unit test I noticed that the more testcases I added to an array, the slower compilation was. It seemed that indexing was taking forever and that this caused the slowdown in compilation.
A bug in xcode?
A bit of searching learned that type inference can cause this kind of slowdown. Especially when default values are assigned to a large array or dictionary.
Since I defined test strings and test results in an array...

Luckily the solution is simple: avoid type inference by defining the array (or dictionary) explicitly:

Don't do this:

let arr = [[1,2,3,4],[5,6,7,8]]

But do this:

let arr: [[Int]] = [[1,2,3,4],[5,6,7,8]]

Compilation speed (indexing) is now back to normal.

Happy Coding ...

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