Swift Dictionary: Get values as array

As of Swift 2.0, Dictionary’s values property now returns a LazyMapCollection instead of a LazyBidirectionalCollection. The Array type knows how to initialise itself using this abstract collection type:

let colors = Array(colorsForColorSchemes.values)

Swift's type inference already knows that these values are UIColor objects, so no type casting is required, which is nice!

You can map dictionary to an array of values:

let colors = colorsForColorScheme.map { $0.1 }

Closure takes a key-value tuple from dictionary and returns just a value. So, map function produces an array of values.

More readable version of the same code:

let colors = colorsForColorScheme.map { (scheme, color) in
    return color
}

UPDATE

From Xcode 9.0, dictionary values can be accessed using values property, which conforms to Collection protocol:

let colors = colorsForColorScheme.values

Typically you just want it as an array:

let colors = Array(dict.values)

and that's it.

Use colorsForColorScheme.map({$0.value})