Question

我有一系列这样的词典：

"subtitles": [{
                "index": 0,
                "language": "eng",
                "name": ""
            }, {
                "index": 1,
                "language": "eng",
                "name": ""
            }, {
                "index": 2,
                "language": "rus",
                "name": ""
            }, {
                "index": 3,
                "language": "chi",
                "name": ""
            }, {
                "index": 4,
                "language": "est",
                "name": ""
            }, {
                "index": 5,
                "language": "hin",
                "name": ""
            }, {
                "index": 6,
                "language": "ind",
                "name": ""
            }, {
                "index": 7,
                "language": "kor",
                "name": ""
            }, {
                "index": 8,
                "language": "lav",
                "name": ""
            }, {
                "index": 9,
                "language": "lit",
                "name": ""
            }, {
                "index": 10,
                "language": "msa",
                "name": ""
            }, {
                "index": 11,
                "language": "chi",
                "name": ""
            }, {
                "index": 12,
                "language": "pol",
                "name": ""
            }, {
                "index": 13,
                "language": "tam",
                "name": ""
            }, {
                "index": 14,
                "language": "tel",
                "name": ""
            }, {
                "index": 15,
                "language": "tha",
                "name": ""
            }, {
                "index": 16,
                "language": "ukr",
                "name": ""
            }, {
                "index": 17,
                "language": "vie",
                "name": ""
            }]

我只想要语言密钥的唯一性。在上面的数组中，前两个元素有语言＆＃34; eng＆＃34;，但我只希望第一个或第二个元素包含在过滤后的数组中。

Answer 1

尝试这个解决方案。希望对您有所帮助。

let subtitleArray:[[String:Any]] = inputDictionary["subtitles"] as! [[String:Any]]     

    var languageArray = [String]()

    var filteredSubtitleArray = subtitleArray.filter { (dict) -> Bool in

            guard let lang = dict["language"] as? String,languageArray.contains(lang) == false else {
                return false
            }

            languageArray.append(lang)

            return true
        }

Answer 2

您可以减少阵列忽略重复的语言：

let reducedSubtitles = dict["subtitles"]!.reduce([[String: Any]]()) { (result, current) in
    if result.contains(where: { $0["language"] as? String == current["language"] as? String }) {
        return result
    }

    return result + [current]
}

从swift词典中获取Dictinct值，但仅在一个键上有所区别

2 个答案: