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How do popular apps authenticate user requests from their mobile app to their server?

Say I have an Android application that connects to a .Net API for receiving/setting data. The confusion that I have is regarding how to sign-up/login the user first time and authenticate it every time they make a request to the API. ...
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Accessing an SQLite Database in Swift

...n database. let fileURL = try! FileManager.default .url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: true) .appendingPathComponent("test.sqlite") // open database var db: OpaquePointer? guard sqlite3_open(fileURL.path, &db) == SQLITE_OK else { ...
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Client-server synchronization pattern / algorithm?

I have a feeling that there must be client-server synchronization patterns out there. But i totally failed to google up one. ...
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How do I connect to this localhost from another computer on the same network?

...onf\extra\httpd-vhosts.conf. On MAMP, you can find this file here: Applications/MAMP/conf/apache/extra/httpd-vhosts.conf. This step prepares the Web server on your computer for handling symfony.local requests. You need to provide the name of the Virtual Host as well as the root/main folder of your w...
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多媒体组件 · App Inventor 2 中文网

...择器。 使用文件选择器组件需要 Android 4.4 或更高版本、iOS 11 或更高版本。要求AI伴侣v2.68及以上。 属性 操作 设置 文件选择器 所需的操作。有如下选项: 选择现有文件:打开现有文件 选择目录:打开现有...
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How to get current CPU and RAM usage in Python?

... The psutil library gives you information about CPU, RAM, etc., on a variety of platforms: psutil is a module providing an interface for retrieving information on running processes and system utilization (CPU, memory) in a portable way by using Python, implement...
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What are free monads?

...ime, but everyone just seems to use/discuss them without giving an explanation of what they are. So: what are free monads? (I'd say I'm familiar with monads and the Haskell basics, but have only a very rough knowledge of category theory.) ...
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Call Go functions from C

... You can call Go code from C. it is a confusing proposition though. The process is outlined in the blog post you linked to. But I can see how that isn't very helpful. Here is a short snippet without any unnecessary bits. It should make things a little clearer. package foo // e...
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What are best practices that you use when writing Objective-C and Cocoa? [closed]

...t. 2) Speaking of private things, I prefer to place private method definitions within the .m file in a class extension like so: #import "MyClass.h" @interface MyClass () - (void) someMethod; - (void) someOtherMethod; @end @implementation MyClass Why clutter up the .h file with things outsiders...
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How dangerous is it to compare floating point values?

I know UIKit uses CGFloat because of the resolution independent coordinate system. 11 Answers ...