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All Ruby tests raising: undefined method `authenticate' for nil:NilClass

...nswered on Twitter by @MatthewClosson @jeffehh You need to create a spec/support/devise.rb file as specified here https://github.com/plataformatec/devise#test-helpers to include the devise test helpers #ruby Thanks once again. ...
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Server is already running in Rails

... command it is showing A server is already running. Check C:/Sites/folder/Pids/Server.pids 14 Answers ...
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How do I disable the “Press ENTER or type command to continue” prompt in Vim?

Is there any way to disable the "Press ENTER or type command to continue" prompt that appears after executing an external command? ...
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How to terminate a window in tmux?

... in tmux? Like the Ctrl a k shortcut in screen with Ctrl a being the prefix. 10 Answers ...
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Java; String replace (using regular expressions)?

As part of a project for school, I need to replace a string from the form: 12 Answers ...
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Find which commit is currently checked out in Git

...ways to view the commit you currently have checked out into your working copy during a git bisect session (note that options 1-4 will also work when you're not doing a bisect): git show. git log -1. Bash prompt. git status. git bisect visualize. I'll explain each option in detail below. Option...
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How do I fix the indentation of an entire file in Vi?

... share | improve this answer | follow | edited Aug 1 '11 at 3:05 ib. 24.6k88 gold ...
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What are the undocumented features and limitations of the Windows FINDSTR command?

...INDSTR command is horribly documented. There is very basic command line help available through FINDSTR /? , or HELP FINDSTR , but it is woefully inadequate. There is a wee bit more documentation online at https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/findstr . ...
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Is it possible to set private property via reflection?

Can I set a private property via reflection? 5 Answers 5 ...
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How can I maintain fragment state when added to the back stack?

I've written up a dummy activity that switches between two fragments. When you go from FragmentA to FragmentB, FragmentA gets added to the back stack. However, when I return to FragmentA (by pressing back), a totally new FragmentA is created and the state it was in is lost. I get the feeling I'm ...