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64 bit - Android Studio: /dev/kvm device permission denied

When I try to run my Android app on an emulator I get this error: /dev/kvm permission denied. I checked the ... the kvm group. What is wrong? See Question&Answers more detail:os...

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Does every web request send the browser cookies?

Does every web request send the browser's cookies? I'm not talking page views, but a request for an image, .js ... or know it already has it? See Question&Answers more detail:os...

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installation - How to Install gcc 5.3 with yum on CentOS 7.2?

I am using CentOS 7.2 When I use yum groupinstall "Development Tools", gcc version is 4.8.5, like this: I ... .3 How to approach this with yum? See Question&Answers more detail:os...

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

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shell - How to set up tmux so that it starts up with specified windows opened?

How to set up tmux so that it starts up with specified windows opened? See Question&Answers more detail:os...

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git - Export a stash to another computer

I need a way to export a stashed change to another computer. On computer 1 I did $ git stash save feature I'm ... to import it as a stash again. See Question&Answers more detail:os...

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architecture - Difference between a "coroutine" and a "thread"?

What are the differences between a "coroutine" and a "thread"? See Question&Answers more detail:os...

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linux - How do I change bash history completion to complete what's already on the line?

I found a command a couple of months ago that made my bash history auto-complete on what's already on the ... . Does anybody know the command? See Question&Answers more detail:os...

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scala - Akka Kill vs. Stop vs. Poison Pill?

Newbie question of Akka - I'm reading over Akka Essentials, could someone please explain the difference between Akka ... the other? Many thanks! See Question&Answers more detail:os...

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vi - Vim delete blank lines

What command can I run to remove blank lines in Vim? See Question&Answers more detail:os...

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java - Uncatchable ChuckNorrisException

Is it possible to construct a snippet of code in Java that would make a hypothetical java.lang. ... or aspect-oriented programming. See Question&Answers more detail:os...

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javascript - How to create an array of object literals in a loop?

I need to create an array of object literals like this: var myColumnDefs = [ {key:"label", sortable:true, ... in each element of the array. See Question&Answers more detail:os...

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Ruby on Rails Callback, what is difference between :before_save and :before_create?

Could you explain in detail what the :before_save and :before_create Ruby on Rails callbacks are, and what ... :before_save or :before_create? See Question&Answers more detail:os...

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autotools - What are Makefile.am and Makefile.in?

These two files are mostly seen in open source projects. What are they for, and how do they work? See Question&Answers more detail:os...

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Rails server says port already used, how to kill that process?

I'm on a mac, doing: rails server I get: 2010-12-17 12:35:15] INFO WEBrick 1.3.1 [2010-12-17 12:35: ... port, but I want to kill this process. See Question&Answers more detail:os...

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caching - What is the difference between buffer and cache memory in Linux?

To me it's not clear what's the difference between the two Linux memory concepts : buffer and cache. I've read ... : 853 1153 Swap: 2859 0 2859 See Question&Answers more detail:os...

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

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linux - How to kill zombie process

I launched my program in the foreground (a daemon program), and then I killed it with kill -9, but I ... anyprogram 1163 root 0 Z [anyprogramd] See Question&Answers more detail:os...

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Looking for suggestions for building a secure REST API within Ruby on Rails

I'm getting started on building a REST API for a project I'm working on, and it led me to do a ... project" or an "existing project"scenario? See Question&Answers more detail:os...

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How do you find the disk size of a Postgres / PostgreSQL table and its indexes

I'm coming to Postgres from Oracle and looking for a way to find the table and index size in terms of bytes/MB/ ... , but I'm not seeing where. See Question&Answers more detail:os...

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

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bash - How to get the start time of a long-running Linux process?

Is it possible to get the start time of an old running process? It seems that ps will report the date ... lost forever for old processes? See Question&Answers more detail:os...

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git - How to keep a branch synchronized/updated with master?

At the moment git is doing my head in, I cannot come up with the best solution for the following. There are two branches, ... F--G--------K--L See Question&Answers more detail:os...

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

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eclipse - How to fix error "Updating Maven Project". Unsupported IClasspathEntry kind=4?

I have imported maven project in STS, when I run update update project I receive: "Updating Maven Project". ... there a workaround for 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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Is it possible to preview stash contents in git?

I often put work away for later, then other stuff comes along, and a few weeks later, I want to inspect the ... change. How can I do this? See Question&Answers more detail:os...

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shelve - What is Shelving in TFS?

Is shelving in TFS merely a soft checkin so other team members can see the source code? i.e. the shelved code will not be compiled right? See Question&Answers more detail:os...

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

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html - Fast and responsive interactive charts/graphs: SVG, Canvas, other?

I am trying to choose the right technology to use for updating a project that basically renders thousands ... /github.com/zooniverse/LightCurves See Question&Answers more detail:os...

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

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haskell - Why not be dependently typed?

I have seen several sources echo the opinion that "Haskell is gradually becoming a dependently-typed language". The ... s the problem. (?) See Question&Answers more detail:os...

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What is the HEAD in git?

There seems to be a difference between the last commit, the HEAD and the state of the file I can see in my ... and what mistake should I avoid? 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 do you add an array to another array in Ruby and not end up with a multi-dimensional result?

somearray = ["some", "thing"] anotherarray = ["another", "thing"] somearray.push(anotherarray.flatten!) I expected ... thing","another","thing"] See Question&Answers more detail:os...

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How can a time function exist in functional programming?

I've to admit that I don't know much about functional programming. I read about it from here and ... current time in functional programming? See Question&Answers more detail:os...

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

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