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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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javascript - How do you Hover in ReactJS? - onMouseLeave not registered during fast hover over

How can you achieve either a hover event or active event in ReactJS when you do inline styling? I've ... document.getElementById('container') ) 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 - Where is pip cache folder?

Where is Python pip cache folder? I had an error during install and now reinstall packages using cache files. ... directory or will remove soon? See Question&Answers more detail:os...

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

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xml - SVG rounded corner

I have the following SVG: <svg> <g> <path id="k9ffd8001" d="M64.5 45.5 82.5 45.5 82.5 64.5 64.5 64.5 ... ="url(#k9ffb0001)"></path> </g> </svg> 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 access downloads folder in android?

I am new android, i'm making an app in which one can download files to downloads folder (using Download ... "></ImageView> </LinearLayout> 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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How to pass array as an argument to a function in Bash

As we know, in bash programming the way to pass arguments is $1, ..., $N. However, I found it ... to pass array between functions correctly? 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 - Could not load file or assembly HRESULT: 0x80131515 (When adding controller to MVC project that has assembly references on network drive)

I've seen this: VSTS 2010 SGEN : error : Could not load file or assembly (Exception from HRESULT: 0x80131515) ... and run the program fine. See Question&Answers more detail:os...

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

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database - How can I find MAX with relational algebra?

Working with databases, how can I find MAX using relational algebra? 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 - What is the shortest way to pretty print a org.w3c.dom.Document to stdout?

What is the easiest way to pretty print (a.k.a. formatted) a org.w3c.dom.Document to stdout? 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 add (vertical) divider to a horizontal LinearLayout?

I'm trying to add a divider to a horizontal linear layout but am getting nowhere. The divider just doesn' ... </LinearLayout> </RelativeLayout> See Question&Answers more detail:os...

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

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angularjs - How to pass data between sibling components without using $scope?

I am making a component that contains 3 child components in this way: <header-component> <side-component> <main- ... components in angular 1.5 ? 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 get database structure in MySQL via query

Is it possible to somehow get structure of MySQL database, or just some table with simple query? Or is there another way, how can 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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string - Strip spaces/tabs/newlines - python

I am trying to remove all spaces/tabs/newlines in python 2.7 on Linux. I wrote this, that should do the ... . Should I be importing 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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Android N requires the IDE to be running with Java 1.8 or later?

My XML layout is not rendering with this error message. I am already using Java 8. Also using latest build tools in ... rc1 ... } XML Error - 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 - How to scale SVG image to fill browser window?

This seems like it ought to be easy, but I'm just not getting something. I want to make an HTML page containing ... I want. What am I missing? See Question&Answers more detail:os...

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

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Terminating a Java Program

I found out ways to terminate (shut-down or stop) my Java programs. I found two solutions for it. using ... without any variables or 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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python - Calculate time difference between Pandas Dataframe indices

I am trying to add a column of deltaT to a dataframe where deltaT is the time difference between the successive rows (as ... 03-20 00:43:00 7 23 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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reactjs - React Router Pass Param to Component

const rootEl = document.getElementById('root'); ReactDOM.render( <BrowserRouter> <Switch> <Route exact path="/"> ... ID on to the DetailsPage ? 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 - Does the C++ volatile keyword introduce a memory fence?

I understand that volatile informs the compiler that the value may be changed, but in order to accomplish ... actual implementations really do? 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 - Creating Rooms in Socket.io

I would like to ask for your help. I'm having a hard time in my client side of socket.io, I would ... there any possible way to create room? 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 - UIGestureRecognizer and UITableViewCell issue

I am attaching a UISwipeGestureRecognizer to a UITableViewCell in the cellForRowAtIndexPath: method like so: - ( ... .. 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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c++ - How does the range-based for work for plain arrays?

In C++11 you can use a range-based for, which acts as the foreach of other languages. It works even with ... use this for with dynamic arrays? 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 - Viewing localhost website from mobile device

I have an ASP.Net website hosted on my Win8's localhost, the site seems to be running as expected on ... my mobile device to localhost website. See Question&Answers more detail:os...

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

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258 views

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algorithm - Weighted random selection from array

I would like to randomly select one element from an array, but each element has a known probability of selection. All ... one element on id 1. See Question&Answers more detail:os...

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

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audio - android: Detect sound level

Using MediaRecorder I capture sound from device's microphone. From the sound I get I need only to analyze the sound ... to a file? 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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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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