swift 可等于协议的数组扩展

Posted 2021-05-19

extension Array: Equatable where Element: Equatable {
  
  static func ==(lhs: Array<Element>, rhs: Array<Element>) -> Bool {
    let count = lhs.count
    if count != rhs.count { return false }
    for x in 0..<count {
      if lhs[x] != rhs[x] { return false }
    }
    return true
  }
}