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An “and” operator for an “if” statement in Bash
... code from @HTF would have failed on -ne: unary operator expected. In your case, it will fail on integer expression expected, won't it ?
– Julien Vivenot
Nov 16 '12 at 0:28
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How do you discover model attributes in Rails?
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To get the associations too you can do: Model.reflect_on_all_associations.map(&:name)
– vasilakisfil
Nov 28 '14 at 9:27
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How to convert a ruby hash object to JSON?
...s the possibility to extend existing classes with your own methods. That's called "class reopening" or monkey-patching (the meaning of the latter can vary, though).
So, take a look here:
car = {:make => "bmw", :year => "2003"}
# => {:make=>"bmw", :year=>"2003"}
car.to_json
# NoMetho...
What is the relationship between the docker host OS and the container base image OS?
...e right question... but while I have been reading everything docker that I can get my hands on I see that I can install Docker on Ubuntu 12.04 (for example) and then I can install a Fedora container or a different version of ubuntu? (there is an example where the user installed busybox in the contai...
Docker: adding a file from a parent directory
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You can build the Dockerfile from the parent directory:
docker build -t <some tag> -f <dir/dir/Dockerfile> .
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How to change highlighted occurrences color in Eclipse's sidebar?
...the text editor and place a faint bar in the right ruler to show you the location of other occurrences in the file.
6 Answe...
Android: Create spinner programmatically from array
I'm all new to Android and I'm trying to create a spinner programmatically and feeding it with data from an array, but Eclipse gives me a warning that I can't handle.
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curl -GET and -X GET
Curl offers a series of different http method calls that are prefixed with a X, but also offers the same methods without. I've tried both and I can't seem to figure out the difference. Can someone explain to me quickly how these two operations differ?
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querySelector, wildcard element match?
Is there a way to do a wildcard element name match using querySelector or querySelectorAll ? I see support for wildcards in attribute queries but not for the elements themselves.
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ERROR: permission denied for sequence cities_id_seq using Postgres
...d nextval functions.
Also as pointed out by @epic_fil in the comments you can grant permissions to all the sequences in the schema with:
GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA public TO www;
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