key

问题 This question already has answers here : React Warning: flattenChildren(…): Encountered two children with the same key (3 answers) Closed 2 years ago . Application works, my classes really adds a new element but I see below warning in console! Warning: Encountered two children with the same key, [object Object] . Keys should be unique so that components maintain their identity across updates. Non-unique keys may cause children to be duplicated and/or omitted — the behavior is unsupported and

问题 I am writing a program in C that uses ncurses to check if a key is being pressed. The problem is that there is a key repeat delay. If I for example hold the key 'a' while in the terminal there is a short delay before 'a' gets repeatedly entered. I want to be able to know if it is being pressed from the point where it is actually pressed. How do temporarily change this delay to be equal to 0 while in the terminal? I'm currently using Mac OSX 10.10.5. 回答1: With ncurses (any curses

问题 I am writing a program in C that uses ncurses to check if a key is being pressed. The problem is that there is a key repeat delay. If I for example hold the key 'a' while in the terminal there is a short delay before 'a' gets repeatedly entered. I want to be able to know if it is being pressed from the point where it is actually pressed. How do temporarily change this delay to be equal to 0 while in the terminal? I'm currently using Mac OSX 10.10.5. 回答1: With ncurses (any curses

问题 While searching for a particular registry key under Local machine SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall using C#, the >net framework application is giving different result than in .Net core App RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall", false); Console.WriteLine(key.GetSubKeyNames().Length); foreach (String keyName in key.GetSubKeyNames()) { RegistryKey subkey = key.OpenSubKey(keyName); string displayName = subkey

问题 I'm looking to ingest a JSON file with arrays into my database. The json file with array items is as below:- { "campaignId": "11067182", "campaignName": "11067182", "channelId": "%pxbid_universal_site_id=!;", "channelName": "%pxbid_universal_site_id=!;", "placementId": "%epid!", "placementName": "%epid!", "publisherId": "%esid!", "publisherName": "%esid!", "hitDate": "2017-03-23", "lowRiskImpressions": "61485", "lowRiskPct": "64.5295", "moderateRiskImpressions": "1887", "moderateRiskPct": "1

问题 I'm looking to ingest a JSON file with arrays into my database. The json file with array items is as below:- { "campaignId": "11067182", "campaignName": "11067182", "channelId": "%pxbid_universal_site_id=!;", "channelName": "%pxbid_universal_site_id=!;", "placementId": "%epid!", "placementName": "%epid!", "publisherId": "%esid!", "publisherName": "%esid!", "hitDate": "2017-03-23", "lowRiskImpressions": "61485", "lowRiskPct": "64.5295", "moderateRiskImpressions": "1887", "moderateRiskPct": "1

问题 I have gone through many questions and Google results but couldn't find the solution. I am trying to sort a table using table.sort function in Lua but I can't figure out how to use it. I have a table that has keys as random numeric values. I want to sort them in ascending order. I have gone through the Lua wiki page also but table.sort only works with the table values. t = { [223]="asd", [23]="fgh", [543]="hjk", [7]="qwe" } I want it like: t = { [7]="qwe", [23]="fgh", [223]="asd", [543]="hjk"

问题 I have gone through many questions and Google results but couldn't find the solution. I am trying to sort a table using table.sort function in Lua but I can't figure out how to use it. I have a table that has keys as random numeric values. I want to sort them in ascending order. I have gone through the Lua wiki page also but table.sort only works with the table values. t = { [223]="asd", [23]="fgh", [543]="hjk", [7]="qwe" } I want it like: t = { [7]="qwe", [23]="fgh", [223]="asd", [543]="hjk"

问题 I want to read an users input into a string while still reacting on ESC press at any time, but without defining a system wide hotkey. So when the user types e. g. "Test Name" but instead of confirming with ENTER presses ESC he should be led back into main menu. Console.Write("Enter name: ") if (Console.ReadLine().Contains(ConsoleKey.Escape.ToString())) { goto MainMenu; } return Console.ReadLine(); Thats the simplest way I could think of, but since ESC is not seen by Console.ReadLine() it is

问题 In Dart language how to get MAP keys by values? I have a Map like; { "01": "USD", "17": "GBP", "33": "EUR" } And I need to use values to get keys. How do I do that? 回答1: var usdKey = curr.keys.firstWhere( (k) => curr[k] == 'USD', orElse: () => null); 回答2: If you will be doing this more than a few times on the same data, you should create an inverse map so that you can perform simple key lookup instead of repeated linear searches. Here's an example of reversing a map (there may be easier ways