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psql: FATAL: role “postgres” does not exist
...s using homebrew, see the comment from @user3402754 below.
Note that the error message does NOT talk about a missing database, it talks about a missing role. Later in the login process it might also stumble over the missing database.
But the first step is to check the missing role: What is the ou...
What is the best way to detect a mobile device?
...le }
– andrewrjones
Jan 20 '13 at 1:05
23
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What are advantages of Artificial Neural Networks over Support Vector Machines? [closed]
...of ( y - U(x,aa) )^{2}
Let me explain why, if you select aa such that the error is minimized, then for a rare set of values you have perfect fit. However, since they are rare the average is never 0. You want to minimize the second although you have a discrete approximation to D. And keep in mind th...
Confused about Service vs Factory
...; }; }]); Read more about it here: docs.angularjs.org/tutorial/step_05
– JustGoscha
Oct 2 '14 at 17:33
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How do you run a single test/spec file in RSpec?
...rspec path/to/spec/file.rb
In your case I think as long as your ./spec/db_spec.rb file includes the appropriate helpers, it should work fine.
If you're using an older version of rspec it is:
spec path/to/spec/file.rb
s...
How to modify the keyboard shortcuts in Eclipse IDE?
Title more or less says it all. Specifically, I've become increasingly annoyed that in order to run an ant script I have to use Alt + Shift + x , q . But I think If I had this power I would many things I would change the shortcuts for/add shortcuts for things that don't currently have them.
...
How do I find the location of my Python site-packages directory?
...ysconfig module instead:
python3 -c 'import sysconfig; print(sysconfig.get_paths()["purelib"])'
The per user site-packages directory (PEP 370) is where Python installs your local packages:
python -m site --user-site
If this points to a non-existing directory check the exit status of Python and ...
将 App Inventor 2 项目连接到外部传感器 · App Inventor 2 中文网
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将 App Inventor 2 项目连接到外部传感器
注意：本报告描述了2014年春季在麻省理工学院电气工...
How to avoid installing “Unlimited Strength” JCE policy files when deploying an application?
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I get this error after running this: java.security.InvalidKeyException: Wrong algorithm: AES or Rijndael required
– Andrew
Aug 24 '16 at 18:58
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Determining the current foreground application from a background task or service
I wish to have one application that runs in the background, which knows when any of the built-in applications (messaging, contacts, etc) is running.
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