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What is the best way to save enums into a database? I know Java provides name() and valueOf() methods to ... enum cannot extend other classes). 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 - How can I programmatically determine if my app is running in the iphone simulator?

As the question states, I would mainly like to know whether or not my code is running in the simulator, but ... that can provide me this info. 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 to get the last character of a string?

How to get the last character of the string: "linto.yahoo.com." The last character of this string is "." How can I find 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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malloc - What is a Memory Heap?

What is a memory heap ? See Question&Answers more detail:os...

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

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ssl - How can I test https connections with Django as easily as I can non-https connections using 'runserver'?

I have an application that uses "secure" cookies and want to test it's functionality without needing to set up ... using ./manage.py runserver? 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 server - Best data store for billions of rows

I need to be able to store small bits of data (approximately 50-75 bytes) for billions of records (~3 billion ... , what would choose and why? See Question&Answers more detail:os...

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

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migration - How do I migrate a model out of one django app and into a new one?

I have a django app with four models in it. I realize now that one of these models should be in a ... migrate the production system and such. See Question&Answers more detail:os...

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

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Prevent screen rotation on Android

I have one of my activities which I would like to prevent from rotating because I'm starting an AsyncTask, and ... shaking his phone like mad"? See Question&Answers more detail:os...

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

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node.js - Run JavaScript in Visual Studio Code

Is there a way to execute JavaScript and display the results using Visual Studio Code? For example, a script ... written using Visual Studio. See Question&Answers more detail:os...

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

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connection pooling - Efficient SQL test query or validation query that will work across all (or most) databases

Many database connection pooling libraries provide the ability to test their SQL connections for idleness. ... database provider configuration. 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 can I search for a commit message on GitHub?

Not in a Git repository, but rather in GitHub specifically - how do I search just the commit messages of a specific repository/branch? 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 Mixed Integer Linear Programming

Are there any Mixed Integer Linear Programming(MILP) solver for Python? Can GLPK python solve MILP problem? ... Linear programming(MILP). 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 - Load dimension value from res/values/dimension.xml from source code

I'd like to load the value as it is. I have two dimension.xml files, one in /res/values/dimension.xml and the ... string that ends in "dip"... See Question&Answers more detail:os...

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

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artificial intelligence - How does Dijkstra's Algorithm and A-Star compare?

I was looking at what the guys in the Mario AI Competition have been doing and some of them have built some ... the context of pathing in games? 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 - What's NSLocalizedString equivalent in Swift?

Is there an Swift equivalent of NSLocalizedString(...)? In Objective-C, we usually use: NSString *string = ... and not convenient at all. See Question&Answers more detail:os...

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

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What does ellipsize mean in android?

I've added an EditText to my layout, and added a hint, and made it centered horizontally. When running the ... between start, end, middle? See Question&Answers more detail:os...

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

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MongoDB: Server has startup warnings ''Access control is not enabled for the database''

I firstly installed MongoDB 3.4.1 today. But when I start it and use MongoDB shell, it gave me these warnings ... Windows [version 10.0.14393]. See Question&Answers more detail:os...

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

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node.js - add created_at and updated_at fields to mongoose schemas

Is there a way to add created_at and updated_at fields to a mongoose schema, without having to pass them in everytime ... : Date.now } }); See Question&Answers more detail:os...

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

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Batch: Remove file extension

I have the following batch script from Wikipedia: @echo off for /R "C:UsersAdminOrdner" %%f in (*.flv) do ( echo ... m a real newbie in batch... 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 - Make anchor link go some pixels above where it's linked to

I'm not sure the best way to ask/search for this question: When you click on an anchor link, it brings you ... below where I currently am!</p> See Question&Answers more detail:os...

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

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concurrency - What is the Swift equivalent to Objective-C's "@synchronized"?

I've searched the Swift book, but can't find the Swift version of @synchronized. How do I do mutual exclusion in Swift? See Question&Answers more detail:os...

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

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http - Volley Android Networking Library

I have few questions around using Volley in my projects: Can this library be used in any Java project or ... source code inside your project? See Question&Answers more detail:os...

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

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dart - How to change the application launcher icon on Flutter?

When I create an app with a flutter create command, the flutter logo is used as an application icon for ... the icons are generated somehow?. 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 - How to check if an object is a list or tuple (but not string)?

This is what I normally do in order to ascertain that the input is a list/tuple - but not a str. Because ... a better way of achieving 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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ios - Core Data background context best practice

I have a large import task I need to do with core data. Let say my core data model look like this: Car ---- ... :note]; }]; } } }]; See Question&Answers more detail:os...

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

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normal distribution - Seeing if data is normally distributed in R

Can someone please help me fill in the following function in R: #data is a single vector of decimal values normally. ... TRUE) else return(NO) } 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 - How to prevent Google Colab from disconnecting?

Q: Is there any way to programmatically prevent Google Colab from disconnecting on a timeout? The following describes ... Are there better ways? 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 to skip over an element in .map()?

How can I skip an array element in .map? My code: var sources = images.map(function (img) { if(img.src.split('. ... ["img.png", null, "img.png"] See Question&Answers more detail:os...

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

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