serialization

问题 I have a spring boot microservice talking to a remote spark cluster with 3 nodes, and executing the following logic: Dataset<Row> df = sparkSession.read().json("/opt/enso/test.json"); StructType schema = df.schema(); JavaPairRDD<Row, Long> zippedRows = df.toJavaRDD().zipWithIndex(); JavaPairRDD<Row, Long> filteredRows = zippedRows.filter(new Function<Tuple2<Row,Long>,Boolean> () { @Override public Boolean call(Tuple2<Row,Long> v1) throws Exception { return v1._2 >= 1 && v1._2 <= 5; } });

问题 Here is my situation. I have written a Playlist class that stores a context. Playlist has 9 child classes. Unfortunately, to pass Playlist between intents, it must implement Serializable. This is a problem because Playlist stores a context, so that the Iterator can work, as the Iterator method that must be Overridden from Iterator can not accept any parameters. Therefore, I must store Context somewhere as it is needed to determine the size of the Playlist. Here is the (simplified) code.

问题 In an iOS app, we are using serialization of complex objects through NSKeyedArchiver/NSKeyedUnarchiver to store info and data. So the app will include such a serialized object in the app bundle, and this file will be created under one specific iOS version (let's say iOS 5.0) As the app will be running on different iOS versions (> 5.0) and even in future versions to come, we want to be sure that the original serialized object included in the app bundle will be perfectly readable on every other

问题 I have prepared xml files with some content and want to load it while playing on iOS device but also I want to change loaded data and serialize it in the same file again. In Unity Editor (Windows) it works perfectly, but when I test it on iOS device it seems that I can read from StreamingAssets using WWW class, but I can't write into it. Also I have found that I can read and write into path created by Application.persistentDataPath. But it seems that location somewhere in device and I can't

问题 I serialize this Kontejner class without problems. public struct Dimenzije { public double duzina, sirina, visina; public Dimenzije(double d, double s, double v) { duzina = d; sirina = s; visina = v; } } public class Kontejner { [BsonId] public string Id { get; set; } public string Opis { get; set; } public Dimenzije Dimenzije { get; set; } [BsonElement] public double Zapremina { get { return Dimenzije.duzina * Dimenzije.sirina * Dimenzije.visina; } } public bool Cvrsti { get; set; } public

问题 There are numerous examples on the web that show how to use the CodeDomSerializer. Most of them show how to override the Serialize and Deserialize methods of that class. The problem is that this Serialize method takes a manager argument of type IDesignerSerializationManager. I cannot figure out how to create an instance of that type... Here's what I tried: var root = new Form(); root.Controls.Add(new TextBox() { Text = "hello" }); Type rootSerializerType = Type.GetType("System.ComponentModel

问题 If I understand Ufuk Hacıoğulları here I can simplify this code: using (var webResponse = (HttpWebResponse)webRequest.GetResponse()) { if (webResponse.StatusCode == HttpStatusCode.OK) { var reader = new StreamReader(webResponse.GetResponseStream()); string s = reader.ReadToEnd(); var arr = JsonConvert.DeserializeObject<JArray>(s); if (arr.Count <= 0) break; foreach (JObject obj in arr) { id = obj.Value<int?>("Id") ?? 0; var _deptId = obj.Value<int?>("deptId") ?? 0; var _subdeptId = obj.Value

问题 If I understand Ufuk Hacıoğulları here I can simplify this code: using (var webResponse = (HttpWebResponse)webRequest.GetResponse()) { if (webResponse.StatusCode == HttpStatusCode.OK) { var reader = new StreamReader(webResponse.GetResponseStream()); string s = reader.ReadToEnd(); var arr = JsonConvert.DeserializeObject<JArray>(s); if (arr.Count <= 0) break; foreach (JObject obj in arr) { id = obj.Value<int?>("Id") ?? 0; var _deptId = obj.Value<int?>("deptId") ?? 0; var _subdeptId = obj.Value

问题 I'm currently AJAX'ing a login form. var data = $(this).serialize(); This is the data I'm sending, I get this with PHP using Codeigniter like so: $ajax = $this->input->post('data'); This returns username=john&password=doe as you'd expect. How do I turn that into an array? I've tried doing unserialize() and I get null. 回答1: I believe you can use PHP's parse_str() function: http://php.net/manual/en/function.parse-str.php <?php $str = "first=value&arr[]=foo+bar&arr[]=baz"; parse_str($str); echo

问题 I have a convenience class wrapper for a Map, that looks something like this: class MapWrapper { private Map<String, Integer> wrapped = new HashMap<>(); public void add(String key, Integer count) {/*implementation*/} // Other modifiers } The reason that I'm not using a Map directly but rather the wrapper is because I need to use the methods to access the Map indirectly. When I de/serialize this object, I would like the JSON to serialize as if the wrapper class wasn't there. E.G. I want: {