keyvaluepair

问题 I have a key value pair like this: var accounts = new List<KeyValuePair<int,int>>(); and the contents of accounts looks like this: {[4,10000]} {[4,19000]} {[4,11000]} {[4,12000]} {[4,13036]} {[4,47100]} {[5,19300]} {[5,32900]} {[5,95800]} {[6,95800]} How can I get all possible combinations of the key value pairs in accounts such that I have: [{4,10000},{5,19300},{6,95800}], [{4,10000},{5,32900},{6,95800}]..... The data structure containing the final result is not of much importance to me, I'm

问题 I have a KeyValuePair List in C# formatted as string,int with an example content: mylist[0]=="str1",5 mylist[2]=="str1",8 I want some code to delete one of the items and to the other add the duplicating values. So it would be: mylist[0]=="str1",13 Definition Code: List<KeyValuePair<string, int>> mylist = new List<KeyValuePair<string, int>>(); Thomas, I'll try to explain it in pseudo code. Basically, I want mylist[x]==samestring,someint mylist[n]==samestring,otherint Becoming: mylist[m]=

来源： https://stackoverflow.com/questions/60862697/convert-hashtable-back-to-string-data-in-efficient-way

来源： https://stackoverflow.com/questions/60862697/convert-hashtable-back-to-string-data-in-efficient-way

问题 I'm using WEB API to receive the request from the Client application to save the Contact Information and I need to send the Error Message only if data has an error otherwise nothing TODO Early I Used Dictionary For Example: Dictionary<string, string> error = new Dictionary<string, string> { {"SaveContactMethod_1", "FirstName Invalid"}, {"SaveContactMethod_2", "LastName Invalid"}, {"SaveContactMethod_3", "MiddleName Invalid"}, } the respective JSON Object is { "error" : { "SaveContactMethod_1"

问题 I am currently facing an issue where I want to add different values to the same Key in a foreach loop. List<KeyValuePair<string, Dictionary<string, string>>> sysList = new List<KeyValuePair<string, Dictionary<string, string>>>(); Dictionary<string, string> newSystem = new Dictionary<string, string>(); string line1=""; string line2=""; string quit=""; foreach(Worksheet ws in workbook.Worksheets) { while(quit != q) { newSystem.Clear(); line1 = Console.ReadLine(); line2 = Console.ReadLine();

问题 I have to sets of Json got from the form the state data objetSet1: {id: 12, name: 'Foo Bar', email: 'foo@bar.com'}, {id: 23, name: 'Bar Foo', email: 'bar@foo.com'}, {id: 61, name: 'Barbell', email: 'barbell@mail.com'}, {id: 45, name: 'Joe Ocean', email: 'joe@ocean.com'} objectSet2: {ObjectId:15, name: 'someone', email: 'someone@mail.com'}, {ObjectId: 23, name: 'sometwo', email: 'sometwo@mail.com'}, {ObjectId: 72, name: 'seven ', email: 'seven@mail.com'}, {ObjectId: 23, name: 'five ', email:

问题 What is the necessity to introduce Pair class when Hashmap can do the same job? I see Pair being introduced to Java version 8 回答1: Your choice of which class to use is not just a message to your computer. It's also a message to future developers - people who will maintain your code in the future, or even you yourself in a few months time. By choosing whether to declare a particular variable as either HashMap or Pair , you're telling those future developers something. It's EITHER This variable

问题 I've a KeyValuePair list use to store some info from incoming message. List<KeyValuePair<int, string>> qInfoTempList = new List<KeyValuePair<int, string>>(); qInfoTempList.Add(new KeyValuePair<int, string>(eventInfo.ReferenceId, eventInfo.StringValue)); Once the messages come in, the message's reference id stores as key and the message's selected value stores as value in the list. How can I detect a duplicated key on the spot and delete the earlier one in the list? In this case, is it better

问题 I was going to use KeyValuePair in a comparison-intensive code and was perplexed checking how it is implemented in .NET (s. below) Why does it not override Equals and GetHashCode for efficiency (and not implement == ) but instead uses the slow reflection-based default implementation? I know that structs/value types have a default implementation based on reflection for their GetHashCode() and Equals(object) methods, but I suppose it is very inefficient compared to overriding equality if you do