数组 – Swift中数组“Join”函数的用途[closed]

Swift 3.0

let joiner = ":"
let elements = ["one","two","three"]
let joinedStrings = elements.joined(separator: joiner)
print("joinedStrings: \(joinedStrings)")

输出：

joinedStrings: one:two:three

Swift 2.0

var joiner = ":"
var elements = ["one","three"]
var joinedStrings = elements.joinWithSeparator(joiner)
print("joinedStrings: \(joinedStrings)")

输出：

joinedStrings: one:two:three

Swift 1.2：

var joiner = ":"
var elements = ["one","three"]
var joinedStrings = joiner.join(elements)
println("joinedStrings: \(joinedStrings)")

在Obj-C中同样的事情比较：

Nsstring *joiner = @":";
NSArray *elements = @[@"one",@"two",@"three"];
Nsstring *joinedStrings = [elements componentsJoinedByString:joiner];
NSLog(@"joinedStrings: %@",joinedStrings);

输出：

joinedStrings: one:two:three