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"] 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.
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"] 
\t, \n, \r. The pattern does: Catch any alphanumeric character (one or more) followed by an (optional) whitespace character. There is no insertion, the respective whitespace character after the match is included.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"] 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"] 
componentsSeparatedByCharactersFromSet with whitespaceAndNewlineCharacterSet for multiple separators might be more appropriate.