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How to check if a database exists in SQL Server?

What is the ideal way to check if a database exists on a SQL Server using TSQL? It seems multiple approaches to implement 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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android - How to debug apk signed for release?

I have an apk which I've signed and uploaded to Android Market, and installed on my phone. I would like ... enabled USB Debugging on my phone. See Question&Answers more detail:os...

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

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python - Strip / trim all strings of a dataframe

Cleaning the values of a multitype data frame in python/pandas, I want to trim the strings. I am currently doing ... , what could I improve ? 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++ - Qt: resizing a QLabel containing a QPixmap while keeping its aspect ratio

I use a QLabel to display the content of a bigger, dynamically changing QPixmap to the user. It would ... accomplish this without subclassing? See Question&Answers more detail:os...

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

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class - Python super method and calling alternatives

I see everywhere examples that super-class methods should be called by: super(SuperClass, instance).method(args) ... .method(instance, args) See Question&Answers more detail:os...

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

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layout - Android: why is there no maxHeight for a View?

View's have a minHeight but somehow are lacking a maxHeight: What I'm trying to achieve is having some ... have a maxHeight implemented.) See Question&Answers more detail:os...

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

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python - setuptools: package data folder location

I use setuptools to distribute my python package. Now I need to distribute additional datafiles. From what I ... would justify this restriction? See Question&Answers more detail:os...

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

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Function chaining in Python

On Codewars.com I encountered the following task: Create a function add that adds numbers together when called in ... I read more about 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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multithreading - How do threads work in Python, and what are common Python-threading specific pitfalls?

I've been trying to wrap my head around how threads work in Python, and it's hard to find good ... into while using threads with Python. See Question&Answers more detail:os...

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

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Remove sequentially duplicate frames when using FFmpeg

Is there any way to detect duplicate frames within the video using ffmpeg? I tried -vf flag with select=gt(scene,0 ... did not work for my case. 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 4.1 DbContext Override SaveChanges to Audit Property Change

I am trying to implement a constrained 'audit log' of property changes to a properties in a set of classes. I ... detail in EF 4.1 DbContext? 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 3 Razor - Adding class to EditorFor

I'm trying to add a class to an input. This is not working: @Html.EditorFor(x => x.Created, new { @class = "date" }) See Question&Answers more detail:os...

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

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kubernetes - How to pull environment variables with Helm charts

I have my deployment.yaml file within the templates directory of Helm charts with several environment variables for the ... do I do 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# - What do programmers mean when they say, "Code against an interface, not an object."?

I've started the very long and arduous quest to learn and apply TDD to my workflow. I'm under the impression ... learn) to grasp the concepts. 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 - Print all the Spring beans that are loaded

Is there a way to print all the spring beans that are loaded on startup?I am using Spring 2.0. See Question&Answers more detail:os...

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

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objective c - "f" after number

What does the f after the numbers indicate? Is this from C or Objective-C? Is there any difference in not adding this ... (0, 0, 320, 50); See Question&Answers more detail:os...

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

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scala - java.io.IOException: Could not locate executable nullinwinutils.exe in the Hadoop binaries. spark Eclipse on windows 7

I'm not able to run a simple spark job in Scala IDE (Maven spark project) installed on Windows 7 Spark ... .FrameDemo.main(FrameDemo.scala)<br> See Question&Answers more detail:os...

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

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ios - Programmatically navigate to another view controller/scene

I got an error message during navigating from first view controller to second view controller. My coding is like ... of type NSException (lldb) 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 - Click events on Pie Charts in Chart.js

I've got a question regard Chart.js. I've drawn multiple piecharts using the documentation provided. I was wondering if ... do I go about 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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android - How to set the initial zoom/width for a webview

I am trying to get the WebView to have similar behavior as the android browser. The browser opens all pages ... any orientation or screen size. See Question&Answers more detail:os...

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

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176 views

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android - NavigationView menu items with counter on the right

The new NavigationView in the new Design Support Library works really great. They use "menu-items" to display the ... like in the GMail app. See Question&Answers more detail:os...

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

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232 views

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iphone - What is the best way to enter numeric values with decimal points?

In my app users need to be able to enter numeric values with decimal places. The iPhone doesn't provides a ... regex the final result? Thanks! 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 achieve "virtual template function" in C++

first off: I have read and I know now that a virtual template member function is not (yet?) possible in ... and intentions clearer. Best, Shadow 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 - How to select id with max date group by category in PostgreSQL?

For an example, I would like to select id with max date group by category, the result is: 7, 2, 6 id ... know how to do this in PostgreSQL? See Question&Answers more detail:os...

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

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Open file dialog and select a file using WPF controls and C#

I have a TextBox named textbox1 and a Button named button1. When I click on button1 I want to browse my ... .Text = "C:myfoldermyimage.jpg" See Question&Answers more detail:os...

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

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963 views

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integer - How to implement infinity in Java?

Does Java have anything to represent infinity for every numerical data type? How is it implemented such that I can ... a proper, easy solution. See Question&Answers more detail:os...

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

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259 views

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ios - How to remove the default Navigation Bar space in SwiftUI NavigationView

I am new to SwiftUI (like most people) and trying to figure out how to remove some whitespace above a List ... as such during my initial view. See Question&Answers more detail:os...

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

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225 views

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python - Django Rest Framework - Could not resolve URL for hyperlinked relationship using view name "user-detail"

I am building a project in Django Rest Framework where users can login to view their wine cellar. My ModelViewSets ... from. Any ideas? Thanks See Question&Answers more detail:os...

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

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