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shell - How to check if running as root in a bash script

I'm writing a script that requires root level permissions, and I want to make it so that if the script ... looking for some syntactic sugar. See Question&Answers more detail:os...

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ruby - gem eventmachine fatal error: 'openssl/ssl.h' file not found

Just installed El Capitan and can't install gem eventmachine 1.0.7. openssl is at 1.0.2a-1. Tried to use - ... Error 1 make failed, exit code 2 See Question&Answers more detail:os...

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node.js hash string?

I have a string that I want to hash. What's the easiest way to generate the hash in node.js? The hash is for versioning, not security. See Question&Answers more detail:os...

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asp.net mvc - Registering Web API 2 external logins from multiple API clients with OWIN Identity

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javascript - How to toggle a boolean?

Is there a really easy way to toggle a boolean value in javascript? So far, the best I've got outside of writing ... bool = bool ? false : true; See Question&Answers more detail:os...

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spam - Should I use the Reply-To header when sending emails as a service to others?

Suppose we have an application that acts as a middleman, allowing Company A to send reports to their customers. ... concerns I should have? See Question&Answers more detail:os...

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ios - Updating to latest version of CocoaPods?

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Package structure for a Java project?

Whats the best practice for setting up package structures in a Java Web Application? How would you setup your src, unit test code, etc? See Question&Answers more detail:os...

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virtualbox - Switch android x86 screen resolution

I would like to use Android-x86 2.2 as an emulator on my Windows 7. I have downloaded VirtualBox and the ISO, and ... How can I get it to work? See Question&Answers more detail:os...

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thumbnails - Facebook Post Link Image

When someone posts a link on facebook, a script usually scans that link for any images, and displays a quick ... any thumbnails from my site? See Question&Answers more detail:os...

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CMake target_link_libraries Interface Dependencies

I am new to CMake and a bit confused with the PUBLIC, PRIVATE and INTERFACE keywords related to ... link interface actually mean? See Question&Answers more detail:os...

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Python Logging (function name, file name, line number) using a single file

I am trying to learn how an application works. And for this I am inserting debug commands as the first ... greatly appreciate any help. Thanks! See Question&Answers more detail:os...

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ios - Centering a view in its superview using Visual Format Language

I just started learning AutoLayout for iOS and had a look at Visual Format Language. It all works fine ... manually create a constraint myself? See Question&Answers more detail:os...

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What is the best way to use a HashMap in C++?

I know that STL has a HashMap API, but I cannot find any good and thorough documentation with good ... good examples will be appreciated. See Question&Answers more detail:os...

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How do I revert my changes to a git submodule?

I have a git submodule (RestKit) which I have added to my repo. I accidentally changed some files in there ... the content of that submodule? See Question&Answers more detail:os...

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What is the difference between Strategy design pattern and State design pattern?

What are the differences between the Strategy design pattern and the State design pattern? I was going through quite ... in layman's terms? See Question&Answers more detail:os...

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iphone - Take screenshots in the iOS simulator

I want to take a screenshot of my iOS application when it is running in the simulator, and save the screenshot on my Mac. How can I do this? See Question&Answers more detail:os...

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javascript - backbone.js structuring nested views and models

Using backbone.js: I have a top level ModelA that contains 2 attributes and 2 nested models, ModelB and ... any help or guidelines appreciated. See Question&Answers more detail:os...

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.net - How do I use a dump file to diagnose a memory leak?

I have a .NET service with a normal private working set of about 80 MB. During a recent load test, the ... this blog post for more details. See Question&Answers more detail:os...

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python - What are the pros and cons between get_dummies (Pandas) and OneHotEncoder (Scikit-learn)?

I'm learning different methods to convert categorical variables to numeric for machine-learning classifiers. I came across ... 2.91 ms per loop See Question&Answers more detail:os...

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javascript - How to hide the Google Invisible reCAPTCHA badge

When implementing the new Google Invisible reCATPTCHA, by default you get a little "protected by reCAPTCHA" badge in ... d like to hide this. See Question&Answers more detail:os...

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html - Section vs Article HTML5

I have a page made up of various "sections" like videos, a newsfeed etc.. I am a bit confused how to ... it appears to be fairly subjective. See Question&Answers more detail:os...

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ASP.NET MVC - Alternative to Role Provider?

I'm trying to avoid the use of the Role Provider and Membership Provider since its way too clumsy in my opinion ... awful.. Thanks in advance. See Question&Answers more detail:os...

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java - Why should one use Objects.requireNonNull()?

I have noted that many Java 8 methods in Oracle JDK use Objects.requireNonNull(), which internally throws ... beginning of the method. See Question&Answers more detail:os...

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sql - What is the difference between a stored procedure and a view?

I am confused about a few points: What is the difference between a stored procedure and a view? When should I use ... points, if there are any. See Question&Answers more detail:os...

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ios - "Too many symbol files" after successfully submitting my apps

I downloaded Xcode 6 GM and submitted two Swift apps to the app store today. Both passed all pre-upload ... wait to see what happens? See Question&Answers more detail:os...

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javascript - How does Bluebird's util.toFastProperties function make an object's properties "fast"?

In Bluebird's util.js file, it has the following function: function toFastProperties(obj) { /*jshint -W027*/ function ... I couldn't find any. See Question&Answers more detail:os...

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r - Determine the number of NA values in a column

I want to count the number of NA values in a data frame column. Say my data frame is called df, and the ... good/most efficient way to 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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