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All Ruby tests raising: undefined method `authenticate' for nil:NilClass
...ion that worked for me.
You will need to log out an anonymous user before setting up variables:
before :each do
sign_out :user
end
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“message failed to fetch from registry” while trying to install any module
...enable nodesource's repo and install:
curl -sL https://deb.nodesource.com/setup | sudo bash -
sudo apt-get install -y nodejs
Note - the previous advice was to use Chris Lea's repo, he's now migrated that to nodesource, see:
https://chrislea.com/2014/07/09/joining-forces-nodesource/
https://node...
How to stop app that node.js express 'npm start'
...lp npm-scripts
prestop, stop, poststop: Run by the npm stop command.
Set one of the above in your package.json, and then use npm stop
npm help npm-stop
You can make this really simple if you set in app.js,
process.title = myApp;
And, then in scripts.json,
"scripts": {
"start": "ap...
How to create composite primary key in SQL Server 2008
...mns you wish to form as a composite key
Right Click over those columns and Set Primary Key
To see the SQL you can then right click on the Table > Script Table As > Create To
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Matching an empty input box using CSS
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Placeholder attribute have to be set. Anyway we can set placeholder attribute as whitespace.
– Piotr Kozłowski
May 30 '17 at 10:07
2
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Passing parameters to a Bash function
I am trying to search how to pass parameters in a Bash function, but what comes up is always how to pass parameter from the command line.
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How do I parse a string with a decimal point to a double?
... If you use numpad in culture with comma, the dot key will be set comma.
– CrazyBaran
Aug 25 '17 at 9:59
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How to hide command output in Bash
...in a pipe the braces will not create a subshell and thus will allow you to set variables inside.
{
/your/first/command
/your/second/command
} &> /dev/null
See the bash manual on redirections for more details, options, and syntax.
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How do I debug an MPI program?
I have an MPI program which compiles and runs, but I would like to step through it to make sure nothing bizarre is happening. Ideally, I would like a simple way to attach GDB to any particular process, but I'm not really sure whether that's possible or how to do it. An alternative would be having ea...
What is an NP-complete in computer science?
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What is NP?
NP is the set of all decision problems (questions with a yes-or-no answer) for which the 'yes'-answers can be verified in polynomial time (O(nk) where n is the problem size, and k is a constant) by a deterministic Turing machine. Polyn...