[英]Compare the values in two different arrays
I am trying to compare the values of two arrays in Swift.我正在尝试比较 Swift 中两个数组的值。 If a value of array2
is not found in array1
all the array2
found values need to be list and deleted.如果值array2
中没有找到array1
所有的array2
中找到的值必须是列表中删除。
I was trying to use the code below but its not working anymore in Swift 2:我试图使用下面的代码,但它在 Swift 2 中不再工作了:
let array1 = [["aaa","12"],["bbb","349"],["ccc","91"],["ddd","143"]]
let array2 = ["aaa","SSS","bbb","ccc","QQQ","ZZZ","ddd"]
let notNeededValues = filter(enumerate(zip(array1,array2))) { $1.0 == $1.1 }.map{ $0.0 }
print(notNeededValues)
Not sure if I understand your problem correctly, but the problem seems to be, that your code needs a simple conversion to Swift 2 syntax:不确定我是否正确理解您的问题,但问题似乎是,您的代码需要简单地转换为 Swift 2 语法:
let array1 = [["aaa","12"],["bbb","349"],["ccc","91"],["ddd","143"]]
let array2 = ["aaa","SSS","bbb","ccc","QQQ","ZZZ","ddd"]
let notNeededValues = zip(array1, array2).enumerate().filter { $1.0 == $1.1 }.map { $0.0 }
print(notNeededValues)
Swift is moving away from globally defined functions, like filter
and enumerate
once were, and is using dot-syntax instead. Swift 正在远离全局定义的函数,比如曾经的filter
和enumerate
,而是使用点语法。 This change was made possible by protocol extensions, and makes code more readable.协议扩展使此更改成为可能,并使代码更具可读性。
Update:更新:
I assume this is what you mean(?):我想这就是你的意思(?):
let notNeededValues = array2.filter { !array1.map { $0[0] }.contains($0) }
// or like this:
let array1FirstElements = array1.map { $0[0] }
let notNeededValues = array2.filter { !array1FirstElements.contains($0) }
How about this:这个怎么样:
let array1 = [["aaa","12"],["bbb","349"],["ccc","91"],["ddd","143"]]
let array2 = ["aaa","SSS","bbb","ccc","QQQ","ZZZ","ddd"]
extension Array where Element: Equatable {
func removeObject(object: Element) -> [Element] {
return filter {$0 != object}
}
}
var filteredArray2 = array2.reduce(array2) {
if array1.flatMap({$0}).contains($1) {
return $0.removeObject($1)
}
return $0
}
print(filteredArray2)
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