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rust - Unwrap inner type when enum variant is known

I have this enum type: enum Animal { Dog(i32), Cat(u8), } Now I have a function that takes ... stackoverflow.com/questions/34953711/unwrap-inner-type-when-enum-variant-is-known...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to play Youtube video in ExoPlayer in Android?

I am trying to play youtube video in exoplayer but here is some confusion I don't know what is DASH url, ... /questions/29607104/how-to-play-youtube-video-in-exoplayer-in-android...

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git - Best workflow when forking and renaming a GitHub project

(Closed). This question is opinion-based. It is not currently accepting answers. question from:https:// ... 5661405/best-workflow-when-forking-and-renaming-a-github-project...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Bug in the string comparing of the .NET Framework

It's a requirement for any comparison sort to work that the underlying order operator is transitive and antisymmetric. ... 13254153/bug-in-the-string-comparing-of-the-net-framework...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Rails 5.1: "unknown firstpos: NilClass" - Issue reloading application

Following an upgrade from Rails 5.0 to 5.1 I'm getting this error anytime the app reloads, either ... /44465118/rails-5-1-unknown-firstpos-nilclass-issue-reloading-application...

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ruby - f.error_messages in Rails 3.0

Rails 3.0 deprecated f.error_messages and now requires a plugin to work correctly - I however want to learn how ... .com/questions/3873190/f-error-messages-in-rails-3-0...

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performance - How many rows are 'too many' for a MySQL table?

(This question already has answers here): question from:https://stackoverflow.com/questions/5350581/how-many-rows-are-too-many-for-a-mysql-table...

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git - destination path already exists and is not an empty directory

I cloned a git repository but accidentally messed up. So I re-cloned and the message showed up: destination path ... /destination-path-already-exists-and-is-not-an-empty-directory...

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Best data persistence for Angularjs/Javascript Apps on PhoneGap?

(Closed). This question is opinion-based. It is not currently accepting answers. question from:https:// ... 23715170/best-data-persistence-for-angularjs-javascript-apps-on-phonegap...

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c++ - Lifetime of lambda objects in relation to function pointer conversion

Following this answer I'm now wondering what the rules are for the lifetime of lambdas and how the relate ... /lifetime-of-lambda-objects-in-relation-to-function-pointer-conversion...

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c++ - Detecting a cross in an image with OpenCV

I'm trying to detect a shape (a cross) in my input video stream with the help of OpenCV. Currently I' ... .com/questions/14612192/detecting-a-cross-in-an-image-with-opencv...

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Diffinitive rules for using Android's getBaseContext, getApplicationContext or using an Activity's "this"

I've googled this question a lot and have found many differing recommendations on when to use ... diffinitive-rules-for-using-androids-getbasecontext-getapplicationcontext-or-u...

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android - SecurityException - GoogleCertificatesRslt: not allowed

We have an app with some million users. Over the past week we have gotten around 30 ... //stackoverflow.com/questions/64196715/securityexception-googlecertificatesrslt-not-allowed...

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Java: Difference between Class.forName and ClassLoader.loadClass

What is the difference between Class.forName and ClassLoader.loadClass in the following codes: Class theClass ... /java-difference-between-class-forname-and-classloader-loadclass...

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Why is tab equal to false in JavaScript?

(This question already has answers here): question from:https://stackoverflow.com/questions/57372554/why-is-tab-equal-to-false-in-javascript...

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integration - What is the difference between a channel adapter and a messaging gateway pattern?

No matter how much I read about those two patterns I just can't see the difference. question from:https: ... -difference-between-a-channel-adapter-and-a-messaging-gateway-pattern...

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How to expand/"preprocess" C++ template code

To properly debug complex macros in C++ I usually run the preprocessor on them in order to see exactly what ... .com/questions/5193867/how-to-expand-preprocess-c-template-code...

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integration - What is the difference between a channel adapter and a messaging gateway pattern?

No matter how much I read about those two patterns I just can't see the difference. question from:https: ... -difference-between-a-channel-adapter-and-a-messaging-gateway-pattern...

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javascript - link element onload

Is there anyway to listen to the onload event for a <link> element? F.ex: var link = document. ... question from:https://stackoverflow.com/questions/3078584/link-element-onload...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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browser - Elinks or Lynx?

(Closed). This question is opinion-based. It is not currently accepting answers. question from:https://stackoverflow.com/questions/604666/elinks-or-lynx...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Whats the difference between z and in a regular expression and when and how do I use it?

From http://java.sun.com/j2se/1.5.0/docs/api/java/util/regex/Pattern.html: The end of the input but for ... -difference-between-z-and-z-in-a-regular-expression-and-when-and-how...

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algorithm - How is 2D bin packing achieved programmatically?

There are a few similar questions on stackoverflow, but none of them seem to provide a tangible answer ... com/questions/8762569/how-is-2d-bin-packing-achieved-programmatically...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How can I use npm for front-end dependencies?

I want to ask if it is possible (and generally a good idea) to use npm to handle front-end dependencies ( ... com/questions/11372408/how-can-i-use-npm-for-front-end-dependencies...

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Best data persistence for Angularjs/Javascript Apps on PhoneGap?

(Closed). This question is opinion-based. It is not currently accepting answers. question from:https:// ... 23715170/best-data-persistence-for-angularjs-javascript-apps-on-phonegap...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to unit test deliberate compilation errors of template code

Please note that this is NOT a duplicate of How write a unit test for verifying compiling error? as I'm ... 7282350/how-to-unit-test-deliberate-compilation-errors-of-template-code...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - iTunes software service authentication error domain error 434

I am uploading iPhone application using latest xCode 8. I have good internet connection and all the ... /39889093/itunes-software-service-authentication-error-domain-error-434...

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c++ - Getting Clang to work on windows

I have followed the following step by step guide and I've managed, after a bit of fiddling, to get clang ... ://stackoverflow.com/questions/6525245/getting-clang-to-work-on-windows...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - what is the default expiration time of a cookie

By default what will be the expiration time of a cookie added using C# code? HttpCookie myCookie= new HttpCookie(" ... /19002254/what-is-the-default-expiration-time-of-a-cookie...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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