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c# - Determine Operating System in .NET Core

How can I determine which operating system my .NET Core app is running on? In the past I could use Environment ... is running on Mac or Windows? See Question&Answers more detail:os...

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.net - WPF - How to force a Command to re-evaluate 'CanExecute' via its CommandBindings

I have a Menu where each MenuItem in the hierarchy has its Command property set to a RoutedCommand I've defined. ... doesn't cause the refresh). See Question&Answers more detail:os...

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scala - Why are `private val` and `private final val` different?

I used to think that private val and private final val are same, until I saw section 4.1 in Scala ... ? Is there any underlying reason? See Question&Answers more detail:os...

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javascript - chart.js load totally new data

The API for chart.js allows one to edit points of the datasets loaded into it, for example: .update( ) Calling ... does not seem to cover this. See Question&Answers more detail:os...

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java - Maven 3.3.1 ECLIPSE: -Dmaven.multiModuleProjectDirectory system propery is not set

I just installed Maven 3.3.1 on Mac OS X, and building a Maven Project with Eclipse is ... "multiModuleProjectDirectory" property in Eclipse? See Question&Answers more detail:os...

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c# - Correct way to get the CoreDispatcher in a Windows Store app

I'm building a Windows Store app, and I have some code that needs to be posted to the UI thread. For ... correct? or if both are equivalent? See Question&Answers more detail:os...

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php - What does "Mass Assignment" mean in Laravel?

When I went through Laravel Document about Eloquent ORM topic part, I got a new term "Mass Assignment". ... a simple explanation about that? See Question&Answers more detail:os...

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c# - Find() vs. Where().FirstOrDefault()

I often see people using Where.FirstOrDefault() to do a search and grab the first element. Why not just use Find() ... Console.ReadKey(); } } } See Question&Answers more detail:os...

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python - How to import classes defined in __init__.py

I am trying to organize some modules for my own use. I have something like this: lib/ __init__.py settings. ... I define the Helper class? See Question&Answers more detail:os...

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c++ - How can I solve the error LNK2019: unresolved external symbol - function?

I get this error, but I don't know how to fix it. I'm using Visual Studio 2013. I made the solution ... /function.cpp" in file unittest.cpp? See Question&Answers more detail:os...

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python - Pandas selecting by label sometimes return Series, sometimes returns DataFrame

In Pandas, when I select a label that only has one entry in the index I get back a Series, but when I ... Out[4]: pandas.core.series.Series See Question&Answers more detail:os...

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javascript - Stubbing a class method with Sinon.js

I am trying to stub a method using sinon.js but I get the following error: Uncaught TypeError: Attempted to wrap ... . What am I doing wrong? See Question&Answers more detail:os...

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reactjs - How can I set a cookie in react?

Orginally, I use the following ajax to set cookie. function setCookieAjax(){ $.ajax({ url: `${Web_Servlet}/ ... the cookie's session time? See Question&Answers more detail:os...

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objective c - Move UIView up when the keyboard appears in iOS

I have a UIView, it is not inside UIScrollView. I would like to move up my View when the keyboard appears ... better solution for this problem? See Question&Answers more detail:os...

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c# - How do I spawn threads on different CPU cores?

Let's say I had a program in C# that did something computationally expensive, like encoding a list of WAV ... dies considered equal in Windows? See Question&Answers more detail:os...

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javascript - Google maps responsive resize

I'm trying to get google maps responsive and resize while keeping its center when windows resizes. I read other ... canvas { height: 100%; } See Question&Answers more detail:os...

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wpf - How can I have a ListBox auto-scroll when a new item is added?

I have a WPF ListBox that is set to scroll horizontally. The ItemsSource is bound to an ObservableCollection in my ... an event that does this. See Question&Answers more detail:os...

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android - Migration from GCM to FCM needed?

Google just announced that Google Cloud Messaging is now Firebase Cloud Messaging. What does this mean for existing ... if any) are needed? See Question&Answers more detail:os...

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Does a break statement break from a switch/select?

I know that switch/select statements break automatically after every case. I am wondering, in the following code: ... or just the switch block? See Question&Answers more detail:os...

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Difference between Python datetime vs time modules

I am trying to figure out the differences between the datetime and time modules, and what each should be ... would especially be of interest. See Question&Answers more detail:os...

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How to check "hasRole" in Java Code with Spring Security?

How to check user authority or permission in Java Code ? For example - I want to show or hide button for user ... Button("Edit users")); } See Question&Answers more detail:os...

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Django ModelForm: What is save(commit=False) used for?

Why would I ever use save(commit=False) instead of just creating a form object from the ModelForm subclass and ... where this might be useful? See Question&Answers more detail:os...

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c++ - fatal error LNK1104: cannot open file 'libboost_system-vc110-mt-gd-1_51.lib'

Seem I can't get this to work. I made a simple console application (which depend on websocket++ library) which ... -1_51.lib instead. Any idea? See Question&Answers more detail:os...

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When to use git subtree?

What problem does git subtree solve? When and why should I use that feature? I've read that it is used ... on another project or library. See Question&Answers more detail:os...

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java - Spring Bean Scopes

Can someone explain what the scopes are in Spring beans I've always just used 'prototype' but are there other ... ="account_usageDao"/> </bean> See Question&Answers more detail:os...

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swift - Sharing data between an iOS 8 share extension and main app

Recently, I've been making a simple iOS 8 share extension to understand how the system works. As Apple states ... user credentials for an API. See Question&Answers more detail:os...

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asynchronous - Do the new C# 5.0 'async' and 'await' keywords use multiple cores?

Two new keywords added to the C# 5.0 language are async and await, both of which work hand in hand to run ... same thread core as the caller? See Question&Answers more detail:os...

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xcode - How to make xib compatible with both iphone 5 and iphone 4 devices

I am trying to layout my xib so that layout fits in both iphone 5 (4 inches retina) and 3.5 devices. Because ... I am using. Here are they: See Question&Answers more detail:os...

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

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