ios - 根据 Swift 中的空值过滤数组

Question

我正在尝试过滤一组字典。下面的代码是我正在寻找的场景示例

let names = [ 
    [ "firstName":"Chris","middleName":"Alex"],
    ["firstName":"Matt","middleName":""],
    ["firstName":"John","middleName":"Luke"],
    ["firstName":"Mary","middleName":"John"],
]

最终结果应该是一个有中间名的数组。

Answer 1

成功了

names.filter {
  if let middleName = $0["middleName"] {
    return !middleName.isEmpty
  }
  return false
}