Swift: Separate String into String Array and Append Separator - swift

Question

How would I split a string to include the separators?
Lets say I had a string such as...
let myString = "apple banana orange grapes"
If I used
let separatedString = myString.componentsSeparatedByString(" ")
my resulting array would be
["apple","banana","orange","grapes"]
How would I achieve a result of
["apple ","banana ","orange ","grapes"]

Answer 1

array.map lets you process the resulting array an add the space back in.
let separatedString = myString
.componentsSeparatedByString(" ")
.map { "\($0) " }
That last line iterates over all strings in the split up array and puts them in $0, and returns a new string with the space added back in which gets used as the replacement for the original string.

Answer 2

Alternative using regular expression:
let myString = "apple banana orange grapes"
let pattern = "\\w+\\s?"
let regex = try! NSRegularExpression(pattern: pattern, options: [])
let matches = regex.matchesInString(myString, options:[], range: NSMakeRange(0, myString.characters.count))
.map { (myString as NSString).substringWithRange($0.range)}
print(matches) // -> ["apple ", "banana ", "orange ", "grapes"]

Answer 3

Solution
Since you updated your question, it looks now you no longer want a new space on the last word.
So here's my updated code
let text = "apple banana orange grapes"
let chunks: [String] = text
.componentsSeparatedByString(" ")
.reverse()
.enumerate()
.map { $0.element + ( $0.index == 0 ? "" : " ") }
.reverse()
print(chunks) // ["apple ", "banana ", "orange ", "grapes"]
Multiple separators
Thank to #vadian for the suggestion
let text = "apple banana\norange grapes"
let chunks: [String] = text
.componentsSeparatedByCharactersInSet(.whitespaceAndNewlineCharacterSet())
.reverse()
.enumerate()
.map { $0.element + ( $0.index == 0 ? "" : " ") }
.reverse()
print(chunks) // ["apple ", "banana ", "orange ", "grapes"]