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java - javac error: Class names are only accepted if annotation processing is explicitly requested

I get this error when I compile my java program: error: Class names, 'EnumDevices', are only accepted if ... do I compile this program? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Location Services not working in iOS 11

I just rebuilt my app with the iOS 11 SDK in an attempt to remove the blue banner that is now always ... 10 - Has anybody heard anything? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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cryptography - How can I generate a cryptographically secure pseudorandom number in C#?

Is there any fast implementation of cryptographically secure pseudorandom number generator (CSPRNG) for C# 3.0 ( ... for authentication tokens? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Entity Framework Code First - No Detach() method on DbContext

I'm wondering why there is no Detach method on the DbContext object like there is for ObjectContext. ?I can only ... ? ?Am I missing something? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to write an ArrayList of Strings into a text file?

I want to write an ArrayList<String> into a text file. The ArrayList is created with the code: ArrayList arr = ... arr.add(st.nextToken()); } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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asp.net mvc - Using System.ComponentModel.DataAnnotations with Entity Framework 4.0

I'm working with MVC3, and using Entity Framework 4.0 Entities as my model. So far, everything works great as far ... approach. How do I do it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring Web MVC - validate individual request params

I'm running a webapp in Spring Web MVC 3.0 and I have a number of controller methods whose signatures ... input parameters using this approach? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Why does C need "struct" keyword and not C++?

I've always been a little confused about what's going on here: #include <stdio.h> int main() { timeval ... has always somewhat baffled me). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Android SimpleDateFormat, how to use it?

I am trying to use the Android SimpleDateFormat like this: String _Date = "2010-09-29 08:45:22" SimpleDateFormat ... format like dd-MM-yyyy? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to correctly and standardly compare floats?

Every time I start a new project and when I need to compare some float or double variables I write the code ... limits(min and max values) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php resize image on upload

I got a form where the user is inserting some data and also uploading an image. To deal with the image, I ... for the code. Thanks in advance! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - width/height after transform

How do I retrieve the width and height properties after I've applied transform: rotate(45deg);? Like, 11x11 square ... How do I get this 17x17? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Using await outside of an async function

I was attempting to chain two async functions together, because the first had a conditional return parameter that ... can't await isInLobby? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How to compile .c file with OpenSSL includes?

I am trying to compile a small .c file that has the following includes: #include <openssl/ssl.h> #include ... to compile with OpenSSL includes? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - When using == for a primitive and a boxed value, is autoboxing done, or is unboxing done

The following code compiles (with Java 8): Integer i1 = 1000; int i2 = 1000; boolean compared = (i1 == ... about the result of the comparison. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - How do I get the position selected in a RecyclerView?

I am experimenting with the support library's recyclerview and cards. I have a recyclerview of cards. Each card ... the adapter from onClick. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Why can't a derived class call protected member function in this code?

#include <iostream> class Base { protected: void somethingProtected() { std::cout << "lala" << std::endl; } }; ... members } private: int a; }; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iphone - Disable UITextField keyboard?

I put a numeric keypad in my app for inputing numbers into a text view, but in order to input numbers I ... ? Any help is greatly appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pip - Tensorflow installation error: not a supported wheel on this platform

when I try to install tensorflow by cloning from git, I run into the error "no module named copyreg," so I ... would be appreciated! Thank you. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Alternatives to Thread.Sleep()

Every N minutes we want to run through a list of tasks. So we've created a task executor with ... .WaitHandle.WaitOne(System.TimeSpan)' See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to add a cumulative column to an R dataframe using dplyr?

I have the same question as this post, but I want to use dplyr: With an R dataframe, eg: df <- data. ... <- ave(df$value, df$id, FUN=cumsum) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - What does sp_reset_connection do?

sp_reset_connection seems to be called by SQL Server connection pooling, to ensure that connections reused from ... transaction isolation level See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ASP.NET Excel export encoding problem

I'm doing some Excel Exports on the ASP.NET Site. Everything works except of the Encoding. When I open it in ... (); What is wrong, please? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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css - internet explorer 10 - how to apply grayscale filter?

This CSS code works pretty nice for Internet Explorer until 9. img.gray { filter: url("data:image/svg+xml; ... do for Internet Explorer 10 ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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301 views

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asp.net mvc - Troubleshooting anti-forgery token problems

I have a form post that consistently gives me an anti-forgery token error. Here is my form: @using (Html. ... ? How can I troubleshoot this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Safely remove a USB drive using the Win32 API?

How do I remove a USB drive using the Win32 API? I do a lot of work on embedded systems and on one of ... that does the same thing. Any ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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664 views

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svn - Structure of Projects in Version Control

I know there are at least 10 different ways to structure project in version control. I'm curious what some ... when necessary for huge changes. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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208 views

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Capturing and storing a picture taken with the Camera into a local database / PhoneGap / Cordova / iOS

I'm currently building an app for iOS using Phonegap/Cordova and jQuerymobile. The idea is to take photos with ... provide me with an example ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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