Swiftで文字列の分割と連結 (split & join)

NSString/NSArrayの時と比べると大分タイプ数が減ってすっきりしました。
joinとsplitはビルドイン関数になりました。

文字列の分割 split

NSArray(旧)

let csvRow = "one,two,three" as NSString
let cells = csvRow.componentsSeparatedByString(",")
// ["one","two","three"]

Array(新)

let csvRow = "one,two,three"
let cells = split(csvRow, { $0 == "," })
// ["one","two","three"]

文字列の連結 join

NSArray(旧)

let cells = ["one", "two", "three"] as NSArray
let csvRow = cells.componentsJoinedByString(",")
// "one,two,three"

Array(新)

let cells = ["one", "two", "three"]
let csvRow = join(",", cells)
// "one,two,three"