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PG undefinedtable error relation users does not exist
...hema:load
In most cases the test database is being sowed during the test procedures, so db:seed task action isn't required to be passed. Otherwise, you shall to prepare the database (this is deprecated in Rails 4):
rake db:test:prepare
and then (if it is actually required):
RAILS_ENV=test rake...
How do I get IntelliJ IDEA to display directories?
...d or target, but hiding everything is just a really terrible idea. And the procedure to unhide stuff in IntelliJ is just awful. "Show everything" should be a simple part of the Project view. (In my case, I checked an Angular project out of git, all was hidden, and there were no modules to select.)
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How to insert a line break in a SQL Server VARCHAR/NVARCHAR string
... sometimes this randomly quits working if you use it in stored procedures
– DaFi4
Nov 20 '19 at 12:20
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Converting RGB to grayscale/intensity
...hotographs
using a visually-oriented approach that emphasizes concept over procedure"
Should you run into "linear" vs "nonlinear" RGB,
here's part of an old note to myself on this.
Repeat, in practice you won't see much difference.
RGB -> ^gamma -> Y -> L*
In color science, the common ...
How do I finish the merge after resolving my merge conflicts?
...his will show you which commands are necessary to continue automatic merge procedure)
[command git suggests, e.g. git merge --continue, git cherry-pick --continue, git rebase --continue]
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im...
“Inspect” a hover element?
...ggest.
Here's how you do it in Chrome. I'm sure Firefox has an equivalent procedure:
Open up Developer Tools and go to Sources.
Note the shortcut to pause script execution—F8.
Interact with the UI to get the element to appear.
Hit F8.
Now you can move your mouse around, inspect the DOM, whate...
How to install the current version of Go in Ubuntu Precise
...tant to install anything that doesn't seem to have its own security update procedure
– nealmcb
Nov 10 '16 at 15:49
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How can I sharpen an image in OpenCV?
...
One general procedure is laid out in the Wikipedia article on unsharp masking:
You use a Gaussian smoothing filter and subtract the smoothed version from the original image (in a weighted way so the values of a constant area remain const...
Can iterators be reset in Python?
...al.
The common pattern is to instead create a new iterator using the same procedure again.
If you want to "save off" an iterator so that you can go back to its beginning, you may also fork the iterator by using itertools.tee
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Testing Private method using mockito
...bjects (or roles) to
collaborate, not methods. Forget about pascal & procedural code. Think
in objects.
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