Nil filter method on array

[michaeleisel]

Sometimes I want to, given an array of an optional type, return an array of the corresponding non-optional type, where all nil values have been filtered out. Here's my best attempt, but it doesn't compile: https://gist.github.com/michaeleisel/32f7e80ce2186f1edc95

Any ideas?

[nickmshelley]

Why not just mapFilter with the identity function?

[pNre]

You can't write an extension that only applies to an array of optionals.
As @nickmshelley suggests, you can do:

array.mapFilter(mapFunction: { $0 })

[michaeleisel]

Yeah mapFilter was perfect, thanks