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问题 I'm using Microsoft.Azure.ServiceBus . (doc) I was getting an exception of: The lock supplied is invalid. Either the lock expired, or the message has already been removed from the queue. By the help of these questions: 1, 2, 3, I am able to avoid the Exception by setting the AutoComplete to false and by increment the Azure's queue lock duration to its max (from 30 seconds to 5 minutes). _queueClient.RegisterMessageHandler(ProcessMessagesAsync, new MessageHandlerOptions

问题 Quick little question... I need to count the length of a string, but WITHOUT the spaces inside of it. E.g. for a string like "I am Bob", string.Length would return 8 (6 letters + 2 spaces). I need a method, or something, to give me the length (or number of) just the letters (6 in the case of "I am Bob") I have tried the following s.Replace (" ", ""); s.Replace (" ", null); s.Replace (" ", string.empty); to try and get "IamBob", which I did, but it didn't solve my problem because it still

问题 Android 7.0 Nougat added Data Saver feature allowing users to restrict background data of certain apps (including push notifications). When Data Saver is ON, only the apps on the list found in Settings → Data Saver → Unrestricted data access are allowed to receive push notifications and execute background network calls. If Data Saver is OFF and your app is not on the unrestricted list, it's pretty much like setting push notifications disabled. There is a use case in my app where it's waiting

问题 I am using FTP over implicit SSL to upload some files. I encountered the following error message [Command] PWD [Response] 257 "/" is current directory. [Command] PWD [Response] 257 "/" is current directory. [Command] TYPE A [Response] 200 Type set to A [Command] PWD [Response] 257 "/" is current directory. [Command] PASV [Response] 227 Entering Passive Mode (10,0,0,19,195,113) [Command] LIST -aL [Response] 521 PROT P required [Command] PWD [Response] 257 "/" is current directory. [Command]

问题 Quick little question... I need to count the length of a string, but WITHOUT the spaces inside of it. E.g. for a string like "I am Bob", string.Length would return 8 (6 letters + 2 spaces). I need a method, or something, to give me the length (or number of) just the letters (6 in the case of "I am Bob") I have tried the following s.Replace (" ", ""); s.Replace (" ", null); s.Replace (" ", string.empty); to try and get "IamBob", which I did, but it didn't solve my problem because it still

问题 I have the following problem: #include <vector> #include <tuple> using namespace std; template< size_t... N_i, typename Ts... > class A { // ... private: std::vector<size_t> _v = { N_i... }; std::tuple<Ts...> _t; }; int main() { A<1> a; } As you can see above, I try to define multiple parameter packs as template arguments of the class A . Unfortunately, the code does not compile: error: expected nested-name-specifier before 'Ts' How can I define multiple parameter packs for this example? 回答1:

问题 Attempting to make a protected internal member of a protected internal class within a public class results with the following issue: Inconsistent accessibility: field type 'what.Class1.ProtectedInternalClass' is less accessible than field 'what.Class1.SomeDataProvider.data' The accessibility should be equivalent, as far as I know. Where am I mistaken? Origination class: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace what { public class Class1 {

问题 I'm fairly new to angular in general, i have built my first few apps with it and right now I'm working on some project that contains angular material. When i go to this site i see lots of properties of the MatSelect directive. There is one property called 'empty: boolean' that I would like to access in some way, but i don't know how, can you help me? 回答1: Pay attention to Exported as:matSelect . You can reference it by template reference variable(#var) or by ViewChild: <mat-select #matSelect

问题 Quick little question... I need to count the length of a string, but WITHOUT the spaces inside of it. E.g. for a string like "I am Bob", string.Length would return 8 (6 letters + 2 spaces). I need a method, or something, to give me the length (or number of) just the letters (6 in the case of "I am Bob") I have tried the following s.Replace (" ", ""); s.Replace (" ", null); s.Replace (" ", string.empty); to try and get "IamBob", which I did, but it didn't solve my problem because it still

问题 I am not sure why htons and ntohs both exist in the standard library. They do exactly the same thing -- unless I'm confused somehow! The same goes for htonl and ntohl . 回答1: They make for self-documenting code that tells the reader whether the data is in host- or network- order. 回答2: This is in case a machine has some sort of unusual endianness besides big-endian or little-endian that isn't one or more simple byte swaps. For example, if the value 0x0A0B0C0D was represented internally as 0B 0C