如何组合 2 个数组以快速创建数组数组

Question

I have latsArr and LongsArr filled from firebase automatically. I want to populate latsAndLongsArray in viewDidLoad function. How can I do that?

var latsArr = [1111.0,2222.0,333.0]
var longsArr = [444.0,555.0,666.0]

var latsAndLongs = [[111.0,444.0],[222.0,555.0],[333.0,666.0]]

Answer 1

结合使用zip(_:_:)和map(_:)方法来获得预期的结果：

let latsAndLongs = zip(latsArr, longsArr).map { [$0.0, $0.1] }

Answer 2

var latsAndLongs = zip(latsArr, longsArr).map({[$0.0, $0.1]})

Answer 3

One option (which uses tuples instead of arrays) is to use zip .

var latsArr = [1111.0,2222.0,333.0]
var longsArr = [444.0,555.0,666.0]

var latsAndLongs = zip(latsArr, longsArr)
// latsAndLongs == [(1111.0, 444.0), (2222.0, 555.0), (333.0, 666.0)]